diff --git a/packages/grpc-js/package.json b/packages/grpc-js/package.json
index 0a4ec9dd..dfa8d483 100644
--- a/packages/grpc-js/package.json
+++ b/packages/grpc-js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@grpc/grpc-js",
-  "version": "0.6.15",
+  "version": "0.6.16",
   "description": "gRPC Library for Node - pure JS implementation",
   "homepage": "https://grpc.io/",
   "repository": "https://github.com/grpc/grpc-node/tree/master/packages/grpc-js",
diff --git a/packages/grpc-js/src/call-stream.ts b/packages/grpc-js/src/call-stream.ts
index c1e9b3b5..80933fb4 100644
--- a/packages/grpc-js/src/call-stream.ts
+++ b/packages/grpc-js/src/call-stream.ts
@@ -163,6 +163,9 @@ export class Http2CallStream extends Duplex implements Call {
    * @param status The status of the call.
    */
   private endCall(status: StatusObject): void {
+    /* Once endCall is called, we are definitely not using the http2 stream
+     * anymore, so we can always safely destroy it here */
+    this.destroyHttp2Stream();
     if (this.finalStatus === null) {
       this.trace(
         'ended with status: code=' +
@@ -246,9 +249,7 @@ export class Http2CallStream extends Duplex implements Call {
   private tryPush(messageBytes: Buffer | null): void {
     if (this.isReadFilterPending) {
       this.trace(
-        '[' +
-          this.callNumber +
-          '] unfilteredReadMessages.push message of length ' +
+        'unfilteredReadMessages.push message of length ' +
           (messageBytes && messageBytes.length)
       );
       this.unfilteredReadMessages.push(messageBytes);
@@ -422,10 +423,15 @@ export class Http2CallStream extends Duplex implements Call {
         if (!this.pendingWriteCallback) {
           throw new Error('Invalid state in write handling code');
         }
+        this.trace(
+          'sending data chunk of length ' +
+            this.pendingWrite.length +
+            ' (deferred)'
+        );
         stream.write(this.pendingWrite, this.pendingWriteCallback);
       }
       if (this.pendingFinalCallback) {
-        this.trace('calling end() on HTTP/2 stream');
+        this.trace('calling end() on HTTP/2 stream (deferred)');
         stream.end(this.pendingFinalCallback);
       }
     }
@@ -514,9 +520,13 @@ export class Http2CallStream extends Duplex implements Call {
     this.trace('write() called with message of length ' + chunk.message.length);
     this.filterStack.sendMessage(Promise.resolve(chunk)).then(message => {
       if (this.http2Stream === null) {
+        this.trace(
+          'deferring writing data chunk of length ' + message.message.length
+        );
         this.pendingWrite = message.message;
         this.pendingWriteCallback = cb;
       } else {
+        this.trace('sending data chunk of length ' + message.message.length);
         this.http2Stream.write(message.message, cb);
       }
     }, this.handleFilterError.bind(this));
@@ -525,6 +535,7 @@ export class Http2CallStream extends Duplex implements Call {
   _final(cb: Function) {
     this.trace('end() called');
     if (this.http2Stream === null) {
+      this.trace('deferring calling end() on HTTP/2 stream');
       this.pendingFinalCallback = cb;
     } else {
       this.trace('calling end() on HTTP/2 stream');
diff --git a/packages/grpc-js/src/channel-credentials.ts b/packages/grpc-js/src/channel-credentials.ts
index f42c7e93..5d5b87d5 100644
--- a/packages/grpc-js/src/channel-credentials.ts
+++ b/packages/grpc-js/src/channel-credentials.ts
@@ -18,7 +18,7 @@
 import { ConnectionOptions, createSecureContext, PeerCertificate } from 'tls';
 
 import { CallCredentials } from './call-credentials';
-import {CIPHER_SUITES, getDefaultRootsData} from './tls-helpers';
+import { CIPHER_SUITES, getDefaultRootsData } from './tls-helpers';
 
 // tslint:disable-next-line:no-any
 function verifyIsBufferOrNull(obj: any, friendlyName: string): void {
@@ -190,7 +190,7 @@ class SecureChannelCredentialsImpl extends ChannelCredentials {
       ca: rootCerts || undefined,
       key: privateKey || undefined,
       cert: certChain || undefined,
-      ciphers: CIPHER_SUITES
+      ciphers: CIPHER_SUITES,
     });
     this.connectionOptions = { secureContext };
     if (verifyOptions && verifyOptions.checkServerIdentity) {
diff --git a/packages/grpc-js/src/channel.ts b/packages/grpc-js/src/channel.ts
index 6cf987cb..6242fc3c 100644
--- a/packages/grpc-js/src/channel.ts
+++ b/packages/grpc-js/src/channel.ts
@@ -38,6 +38,7 @@ import { getDefaultAuthority } from './resolver';
 import { LoadBalancingConfig } from './load-balancing-config';
 import { ServiceConfig, validateServiceConfig } from './service-config';
 import { trace } from './logging';
+import { SubchannelAddress } from './subchannel';
 
 export enum ConnectivityState {
   CONNECTING,
@@ -142,10 +143,12 @@ export class ChannelImplementation implements Channel {
   ) {
     /* The global boolean parameter to getSubchannelPool has the inverse meaning to what
      * the grpc.use_local_subchannel_pool channel option means. */
-    this.subchannelPool = getSubchannelPool((options['grpc.use_local_subchannel_pool'] ?? 0) === 0);
+    this.subchannelPool = getSubchannelPool(
+      (options['grpc.use_local_subchannel_pool'] ?? 0) === 0
+    );
     const channelControlHelper: ChannelControlHelper = {
       createSubchannel: (
-        subchannelAddress: string,
+        subchannelAddress: SubchannelAddress,
         subchannelArgs: ChannelOptions
       ) => {
         return this.subchannelPool.getOrCreateSubchannel(
@@ -234,16 +237,25 @@ export class ChannelImplementation implements Channel {
                       callStream
                     );
                   } catch (error) {
-                    callStream.cancelWithStatus(
-                      Status.UNAVAILABLE,
-                      'Failed to start call on picked subchannel'
-                    );
+                    /* An error here indicates that something went wrong with
+                     * the picked subchannel's http2 stream right before we
+                     * tried to start the stream. We are handling a promise
+                     * result here, so this is asynchronous with respect to the
+                     * original tryPick call, so calling it again is not
+                     * recursive. We call tryPick immediately instead of
+                     * queueing this pick again because handling the queue is
+                     * triggered by state changes, and we want to immediately
+                     * check if the state has already changed since the
+                     * previous tryPick call. We do this instead of cancelling
+                     * the stream because the correct behavior may be
+                     * re-queueing instead, based on the logic in the rest of
+                     * tryPick */
+                    this.tryPick(callStream, callMetadata);
                   }
                 } else {
-                  callStream.cancelWithStatus(
-                    Status.UNAVAILABLE,
-                    'Connection dropped while starting call'
-                  );
+                  /* The logic for doing this here is the same as in the catch
+                   * block above */
+                  this.tryPick(callStream, callMetadata);
                 }
               },
               (error: Error & { code: number }) => {
diff --git a/packages/grpc-js/src/http_proxy.ts b/packages/grpc-js/src/http_proxy.ts
index 18a6fd48..a3ba0f58 100644
--- a/packages/grpc-js/src/http_proxy.ts
+++ b/packages/grpc-js/src/http_proxy.ts
@@ -22,6 +22,7 @@ import { parseTarget } from "./resolver-dns";
 import { Socket } from "net";
 import * as http from 'http';
 import * as logging from './logging';
+import { SubchannelAddress, TcpSubchannelAddress, isTcpSubchannelAddress } from "./subchannel";
 
 const TRACER_NAME = 'proxy';
 
@@ -123,15 +124,16 @@ export function shouldUseProxy(target: string): boolean {
   return true;
 }
 
-export function getProxiedConnection(target: string, subchannelAddress: string): Promise<Socket> {
-  if (!(PROXY_INFO.address && shouldUseProxy(target))) {
+export function getProxiedConnection(target: string, subchannelAddress: SubchannelAddress): Promise<Socket> {
+  if (!(PROXY_INFO.address && shouldUseProxy(target) && isTcpSubchannelAddress(subchannelAddress))) {
     return Promise.reject<Socket>();
   }
+  const subchannelAddressPathString = `${subchannelAddress.host}:${subchannelAddress.port}`;
   trace('Using proxy ' + PROXY_INFO.address + ' to connect to ' + target + ' at ' + subchannelAddress);
   const options: http.RequestOptions = {
     method: 'CONNECT',
     host: PROXY_INFO.address,
-    path: subchannelAddress
+    path: subchannelAddressPathString
   };
   if (PROXY_INFO.creds) {
     options.headers = {
diff --git a/packages/grpc-js/src/load-balancer-pick-first.ts b/packages/grpc-js/src/load-balancer-pick-first.ts
index a5fbf0fa..52ce8457 100644
--- a/packages/grpc-js/src/load-balancer-pick-first.ts
+++ b/packages/grpc-js/src/load-balancer-pick-first.ts
@@ -30,7 +30,11 @@ import {
   UnavailablePicker,
 } from './picker';
 import { LoadBalancingConfig } from './load-balancing-config';
-import { Subchannel, ConnectivityStateListener } from './subchannel';
+import {
+  Subchannel,
+  ConnectivityStateListener,
+  SubchannelAddress,
+} from './subchannel';
 import * as logging from './logging';
 import { LogVerbosity } from './constants';
 
@@ -76,7 +80,7 @@ export class PickFirstLoadBalancer implements LoadBalancer {
   /**
    * The list of backend addresses most recently passed to `updateAddressList`.
    */
-  private latestAddressList: string[] = [];
+  private latestAddressList: SubchannelAddress[] = [];
   /**
    * The list of subchannels this load balancer is currently attempting to
    * connect to.
@@ -369,7 +373,7 @@ export class PickFirstLoadBalancer implements LoadBalancer {
   }
 
   updateAddressList(
-    addressList: string[],
+    addressList: SubchannelAddress[],
     lbConfig: LoadBalancingConfig | null
   ): void {
     // lbConfig has no useful information for pick first load balancing
diff --git a/packages/grpc-js/src/load-balancer-round-robin.ts b/packages/grpc-js/src/load-balancer-round-robin.ts
index e3eedfe5..4956e11e 100644
--- a/packages/grpc-js/src/load-balancer-round-robin.ts
+++ b/packages/grpc-js/src/load-balancer-round-robin.ts
@@ -30,7 +30,11 @@ import {
   UnavailablePicker,
 } from './picker';
 import { LoadBalancingConfig } from './load-balancing-config';
-import { Subchannel, ConnectivityStateListener } from './subchannel';
+import {
+  Subchannel,
+  ConnectivityStateListener,
+  SubchannelAddress,
+} from './subchannel';
 
 const TYPE_NAME = 'round_robin';
 
@@ -168,7 +172,7 @@ export class RoundRobinLoadBalancer implements LoadBalancer {
   }
 
   updateAddressList(
-    addressList: string[],
+    addressList: SubchannelAddress[],
     lbConfig: LoadBalancingConfig | null
   ): void {
     this.resetSubchannelList();
diff --git a/packages/grpc-js/src/load-balancer.ts b/packages/grpc-js/src/load-balancer.ts
index 69114521..5fa4bdc5 100644
--- a/packages/grpc-js/src/load-balancer.ts
+++ b/packages/grpc-js/src/load-balancer.ts
@@ -16,7 +16,7 @@
  */
 
 import { ChannelOptions } from './channel-options';
-import { Subchannel } from './subchannel';
+import { Subchannel, SubchannelAddress } from './subchannel';
 import { ConnectivityState } from './channel';
 import { Picker } from './picker';
 import { LoadBalancingConfig } from './load-balancing-config';
@@ -34,7 +34,7 @@ export interface ChannelControlHelper {
    * @param subchannelArgs Extra channel arguments specified by the load balancer
    */
   createSubchannel(
-    subchannelAddress: string,
+    subchannelAddress: SubchannelAddress,
     subchannelArgs: ChannelOptions
   ): Subchannel;
   /**
@@ -66,7 +66,7 @@ export interface LoadBalancer {
    *     if one was provided
    */
   updateAddressList(
-    addressList: string[],
+    addressList: SubchannelAddress[],
     lbConfig: LoadBalancingConfig | null
   ): void;
   /**
diff --git a/packages/grpc-js/src/metadata.ts b/packages/grpc-js/src/metadata.ts
index 4b41aa25..630fb99a 100644
--- a/packages/grpc-js/src/metadata.ts
+++ b/packages/grpc-js/src/metadata.ts
@@ -174,7 +174,7 @@ export class Metadata {
    * @return The newly cloned object.
    */
   clone(): Metadata {
-    const newMetadata = new Metadata();
+    const newMetadata = new Metadata(this.options);
     const newInternalRepr = newMetadata.internalRepr;
 
     this.internalRepr.forEach((value, key) => {
diff --git a/packages/grpc-js/src/resolver-dns.ts b/packages/grpc-js/src/resolver-dns.ts
index 3100d3f6..feec8f63 100644
--- a/packages/grpc-js/src/resolver-dns.ts
+++ b/packages/grpc-js/src/resolver-dns.ts
@@ -30,6 +30,7 @@ import { StatusObject } from './call-stream';
 import { Metadata } from './metadata';
 import * as logging from './logging';
 import { LogVerbosity } from './constants';
+import { SubchannelAddress, TcpSubchannelAddress } from './subchannel';
 
 const TRACER_NAME = 'dns_resolver';
 
@@ -112,7 +113,7 @@ const dnsLookupPromise = util.promisify(dns.lookup);
  * @param target
  * @return An "IP:port" string in an array if parsing was successful, `null` otherwise
  */
-function parseIP(target: string): string[] | null {
+function parseIP(target: string): SubchannelAddress[] | null {
   /* These three regular expressions are all mutually exclusive, so we just
    * want the first one that matches the target string, if any do. */
   const ipv4Match = IPV4_REGEX.exec(target);
@@ -123,14 +124,14 @@ function parseIP(target: string): string[] | null {
   }
 
   // ipv6 addresses should be bracketed
-  const addr = ipv4Match ? match[1] : `[${match[1]}]`;
+  const addr = match[1];
   let port: string;
   if (match[2]) {
     port = match[2];
   } else {
     port = DEFAULT_PORT;
   }
-  return [`${addr}:${port}`];
+  return [{ host: addr, port: +port }];
 }
 
 /**
@@ -161,7 +162,7 @@ function mergeArrays<T>(...arrays: T[][]): T[] {
  * Resolver implementation that handles DNS names and IP addresses.
  */
 class DnsResolver implements Resolver {
-  private readonly ipResult: string[] | null;
+  private readonly ipResult: SubchannelAddress[] | null;
   private readonly dnsHostname: string | null;
   private readonly port: string | null;
   /* The promise results here contain, in order, the A record, the AAAA record,
@@ -222,23 +223,28 @@ class DnsResolver implements Resolver {
       this.pendingResultPromise.then(
         ([addressList, txtRecord]) => {
           this.pendingResultPromise = null;
-          const ip4Addresses: string[] = addressList
-            .filter(addr => addr.family === 4)
-            .map(addr => `${addr.address}:${this.port}`);
-          let ip6Addresses: string[];
+          const ip4Addresses: dns.LookupAddress[] = addressList.filter(
+            addr => addr.family === 4
+          );
+          let ip6Addresses: dns.LookupAddress[];
           if (semver.satisfies(process.version, IPV6_SUPPORT_RANGE)) {
-            ip6Addresses = addressList
-              .filter(addr => addr.family === 6)
-              .map(addr => `[${addr.address}]:${this.port}`);
+            ip6Addresses = addressList.filter(addr => addr.family === 6);
           } else {
             ip6Addresses = [];
           }
-          const allAddresses: string[] = mergeArrays(
+          const allAddresses: TcpSubchannelAddress[] = mergeArrays(
             ip4Addresses,
             ip6Addresses
-          );
+          ).map(addr => ({ host: addr.address, port: +this.port! }));
+          const allAddressesString: string =
+            '[' +
+            allAddresses.map(addr => addr.host + ':' + addr.port).join(',') +
+            ']';
           trace(
-            'Resolved addresses for target ' + this.target + ': ' + allAddresses
+            'Resolved addresses for target ' +
+              this.target +
+              ': ' +
+              allAddressesString
           );
           if (allAddresses.length === 0) {
             this.listener.onError(this.defaultResolutionError);
diff --git a/packages/grpc-js/src/resolver-uds.ts b/packages/grpc-js/src/resolver-uds.ts
index 536a018b..91128d2c 100644
--- a/packages/grpc-js/src/resolver-uds.ts
+++ b/packages/grpc-js/src/resolver-uds.ts
@@ -20,6 +20,7 @@ import {
   registerResolver,
   registerDefaultResolver,
 } from './resolver';
+import { SubchannelAddress } from './subchannel';
 
 function getUdsName(target: string): string {
   /* Due to how this resolver is registered, it should only be constructed
@@ -34,9 +35,9 @@ function getUdsName(target: string): string {
 }
 
 class UdsResolver implements Resolver {
-  private addresses: string[] = [];
+  private addresses: SubchannelAddress[] = [];
   constructor(target: string, private listener: ResolverListener) {
-    this.addresses = [getUdsName(target)];
+    this.addresses = [{ path: getUdsName(target) }];
   }
   updateResolution(): void {
     process.nextTick(
diff --git a/packages/grpc-js/src/resolver.ts b/packages/grpc-js/src/resolver.ts
index 3af5da9c..b2be310f 100644
--- a/packages/grpc-js/src/resolver.ts
+++ b/packages/grpc-js/src/resolver.ts
@@ -20,6 +20,7 @@ import { ServiceConfig } from './service-config';
 import * as resolver_dns from './resolver-dns';
 import * as resolver_uds from './resolver-uds';
 import { StatusObject } from './call-stream';
+import { SubchannelAddress } from './subchannel';
 
 /**
  * A listener object passed to the resolver's constructor that provides name
@@ -36,7 +37,7 @@ export interface ResolverListener {
    *     service configuration was invalid
    */
   onSuccessfulResolution(
-    addressList: string[],
+    addressList: SubchannelAddress[],
     serviceConfig: ServiceConfig | null,
     serviceConfigError: StatusObject | null
   ): void;
diff --git a/packages/grpc-js/src/resolving-load-balancer.ts b/packages/grpc-js/src/resolving-load-balancer.ts
index 496e1345..a9ba0594 100644
--- a/packages/grpc-js/src/resolving-load-balancer.ts
+++ b/packages/grpc-js/src/resolving-load-balancer.ts
@@ -34,6 +34,7 @@ import { StatusObject } from './call-stream';
 import { Metadata } from './metadata';
 import * as logging from './logging';
 import { LogVerbosity } from './constants';
+import { SubchannelAddress } from './subchannel';
 
 const TRACER_NAME = 'resolving_load_balancer';
 
@@ -132,7 +133,7 @@ export class ResolvingLoadBalancer implements LoadBalancer {
     this.updateState(ConnectivityState.IDLE, new QueuePicker(this));
     this.innerResolver = createResolver(target, {
       onSuccessfulResolution: (
-        addressList: string[],
+        addressList: SubchannelAddress[],
         serviceConfig: ServiceConfig | null,
         serviceConfigError: ServiceError | null
       ) => {
@@ -243,7 +244,7 @@ export class ResolvingLoadBalancer implements LoadBalancer {
 
     this.innerChannelControlHelper = {
       createSubchannel: (
-        subchannelAddress: string,
+        subchannelAddress: SubchannelAddress,
         subchannelArgs: ChannelOptions
       ) => {
         return this.channelControlHelper.createSubchannel(
@@ -289,7 +290,7 @@ export class ResolvingLoadBalancer implements LoadBalancer {
 
     this.replacementChannelControlHelper = {
       createSubchannel: (
-        subchannelAddress: string,
+        subchannelAddress: SubchannelAddress,
         subchannelArgs: ChannelOptions
       ) => {
         return this.channelControlHelper.createSubchannel(
@@ -409,7 +410,7 @@ export class ResolvingLoadBalancer implements LoadBalancer {
   }
 
   updateAddressList(
-    addressList: string[],
+    addressList: SubchannelAddress[],
     lbConfig: LoadBalancingConfig | null
   ) {
     throw new Error('updateAddressList not supported on ResolvingLoadBalancer');
diff --git a/packages/grpc-js/src/server-credentials.ts b/packages/grpc-js/src/server-credentials.ts
index b56cb68a..17ab2980 100644
--- a/packages/grpc-js/src/server-credentials.ts
+++ b/packages/grpc-js/src/server-credentials.ts
@@ -16,7 +16,7 @@
  */
 
 import { SecureServerOptions } from 'http2';
-import {CIPHER_SUITES, getDefaultRootsData} from './tls-helpers';
+import { CIPHER_SUITES, getDefaultRootsData } from './tls-helpers';
 
 export interface KeyCertPair {
   private_key: Buffer;
@@ -75,7 +75,7 @@ export abstract class ServerCredentials {
       cert,
       key,
       requestCert: checkClientCertificate,
-      ciphers: CIPHER_SUITES
+      ciphers: CIPHER_SUITES,
     });
   }
 }
diff --git a/packages/grpc-js/src/server.ts b/packages/grpc-js/src/server.ts
index 03fcfaf9..a2db30be 100644
--- a/packages/grpc-js/src/server.ts
+++ b/packages/grpc-js/src/server.ts
@@ -203,11 +203,16 @@ export class Server {
     const options: ListenOptions = { host: url.hostname, port: +url.port };
     const serverOptions: http2.ServerOptions = {};
     if ('grpc.max_concurrent_streams' in this.options) {
-      serverOptions.settings = {maxConcurrentStreams: this.options['grpc.max_concurrent_streams']};
+      serverOptions.settings = {
+        maxConcurrentStreams: this.options['grpc.max_concurrent_streams'],
+      };
     }
 
     if (creds._isSecure()) {
-      const secureServerOptions = Object.assign(serverOptions, creds._getSettings()!);
+      const secureServerOptions = Object.assign(
+        serverOptions,
+        creds._getSettings()!
+      );
       this.http2Server = http2.createSecureServer(secureServerOptions);
     } else {
       this.http2Server = http2.createServer(serverOptions);
diff --git a/packages/grpc-js/src/subchannel-pool.ts b/packages/grpc-js/src/subchannel-pool.ts
index 009141e3..61a4e13c 100644
--- a/packages/grpc-js/src/subchannel-pool.ts
+++ b/packages/grpc-js/src/subchannel-pool.ts
@@ -16,7 +16,11 @@
  */
 
 import { ChannelOptions, channelOptionsEqual } from './channel-options';
-import { Subchannel } from './subchannel';
+import {
+  Subchannel,
+  SubchannelAddress,
+  subchannelAddressEqual,
+} from './subchannel';
 import { ChannelCredentials } from './channel-credentials';
 
 // 10 seconds in milliseconds. This value is arbitrary.
@@ -28,13 +32,12 @@ const REF_CHECK_INTERVAL = 10_000;
 
 export class SubchannelPool {
   private pool: {
-    [channelTarget: string]: {
-      [subchannelTarget: string]: Array<{
-        channelArguments: ChannelOptions;
-        channelCredentials: ChannelCredentials;
-        subchannel: Subchannel;
-      }>;
-    };
+    [channelTarget: string]: Array<{
+      subchannelAddress: SubchannelAddress;
+      channelArguments: ChannelOptions;
+      channelCredentials: ChannelCredentials;
+      subchannel: Subchannel;
+    }>;
   } = Object.create(null);
 
   /**
@@ -62,23 +65,20 @@ export class SubchannelPool {
      * do not need to be filtered */
     // tslint:disable-next-line:forin
     for (const channelTarget in this.pool) {
-      // tslint:disable-next-line:forin
-      for (const subchannelTarget in this.pool[channelTarget]) {
-        const subchannelObjArray = this.pool[channelTarget][subchannelTarget];
+      const subchannelObjArray = this.pool[channelTarget];
 
-        const refedSubchannels = subchannelObjArray.filter(
-          value => !value.subchannel.unrefIfOneRef()
-        );
+      const refedSubchannels = subchannelObjArray.filter(
+        value => !value.subchannel.unrefIfOneRef()
+      );
 
-        if (refedSubchannels.length > 0) {
-          allSubchannelsUnrefed = false;
-        }
-
-        /* For each subchannel in the pool, try to unref it if it has
-         * exactly one ref (which is the ref from the pool itself). If that
-         * does happen, remove the subchannel from the pool */
-        this.pool[channelTarget][subchannelTarget] = refedSubchannels;
+      if (refedSubchannels.length > 0) {
+        allSubchannelsUnrefed = false;
       }
+
+      /* For each subchannel in the pool, try to unref it if it has
+       * exactly one ref (which is the ref from the pool itself). If that
+       * does happen, remove the subchannel from the pool */
+      this.pool[channelTarget] = refedSubchannels;
     }
     /* Currently we do not delete keys with empty values. If that results
      * in significant memory usage we should change it. */
@@ -114,25 +114,27 @@ export class SubchannelPool {
    */
   getOrCreateSubchannel(
     channelTarget: string,
-    subchannelTarget: string,
+    subchannelTarget: SubchannelAddress,
     channelArguments: ChannelOptions,
     channelCredentials: ChannelCredentials
   ): Subchannel {
     this.ensureCleanupTask();
 
     if (channelTarget in this.pool) {
-      if (subchannelTarget in this.pool[channelTarget]) {
-        const subchannelObjArray = this.pool[channelTarget][subchannelTarget];
-        for (const subchannelObj of subchannelObjArray) {
-          if (
-            channelOptionsEqual(
-              channelArguments,
-              subchannelObj.channelArguments
-            ) &&
-            channelCredentials._equals(subchannelObj.channelCredentials)
-          ) {
-            return subchannelObj.subchannel;
-          }
+      const subchannelObjArray = this.pool[channelTarget];
+      for (const subchannelObj of subchannelObjArray) {
+        if (
+          subchannelAddressEqual(
+            subchannelTarget,
+            subchannelObj.subchannelAddress
+          ) &&
+          channelOptionsEqual(
+            channelArguments,
+            subchannelObj.channelArguments
+          ) &&
+          channelCredentials._equals(subchannelObj.channelCredentials)
+        ) {
+          return subchannelObj.subchannel;
         }
       }
     }
@@ -144,12 +146,10 @@ export class SubchannelPool {
       channelCredentials
     );
     if (!(channelTarget in this.pool)) {
-      this.pool[channelTarget] = Object.create(null);
+      this.pool[channelTarget] = [];
     }
-    if (!(subchannelTarget in this.pool[channelTarget])) {
-      this.pool[channelTarget][subchannelTarget] = [];
-    }
-    this.pool[channelTarget][subchannelTarget].push({
+    this.pool[channelTarget].push({
+      subchannelAddress: subchannelTarget,
       channelArguments,
       channelCredentials,
       subchannel,
diff --git a/packages/grpc-js/src/subchannel.ts b/packages/grpc-js/src/subchannel.ts
index 31ca76fa..66d14621 100644
--- a/packages/grpc-js/src/subchannel.ts
+++ b/packages/grpc-js/src/subchannel.ts
@@ -20,14 +20,14 @@ import { ChannelCredentials } from './channel-credentials';
 import { Metadata } from './metadata';
 import { Http2CallStream } from './call-stream';
 import { ChannelOptions } from './channel-options';
-import { PeerCertificate, checkServerIdentity } from 'tls';
+import { PeerCertificate, checkServerIdentity, TLSSocket } from 'tls';
 import { ConnectivityState } from './channel';
 import { BackoffTimeout, BackoffOptions } from './backoff-timeout';
 import { getDefaultAuthority } from './resolver';
 import * as logging from './logging';
 import { LogVerbosity } from './constants';
-import { Socket } from 'net';
 import { shouldUseProxy, getProxiedConnection } from './http_proxy';
+import * as net from 'net';
 
 const { version: clientVersion } = require('../../package.json');
 
@@ -75,6 +75,44 @@ function uniformRandom(min: number, max: number) {
 
 const tooManyPingsData: Buffer = Buffer.from('too_many_pings', 'ascii');
 
+export interface TcpSubchannelAddress {
+  port: number;
+  host: string;
+}
+
+export interface IpcSubchannelAddress {
+  path: string;
+}
+
+/**
+ * This represents a single backend address to connect to. This interface is a
+ * subset of net.SocketConnectOpts, i.e. the options described at
+ * https://nodejs.org/api/net.html#net_socket_connect_options_connectlistener.
+ * Those are in turn a subset of the options that can be passed to http2.connect.
+ */
+export type SubchannelAddress = TcpSubchannelAddress | IpcSubchannelAddress;
+
+export function isTcpSubchannelAddress(
+  address: SubchannelAddress
+): address is TcpSubchannelAddress {
+  return 'port' in address;
+}
+
+export function subchannelAddressEqual(
+  address1: SubchannelAddress,
+  address2: SubchannelAddress
+): boolean {
+  if (isTcpSubchannelAddress(address1)) {
+    return (
+      isTcpSubchannelAddress(address2) &&
+      address1.host === address2.host &&
+      address1.port === address2.port
+    );
+  } else {
+    return !isTcpSubchannelAddress(address2) && address1.path === address2.path;
+  }
+}
+
 export class Subchannel {
   /**
    * The subchannel's current connectivity state. Invariant: `session` === `null`
@@ -137,6 +175,11 @@ export class Subchannel {
    */
   private refcount = 0;
 
+  /**
+   * A string representation of the subchannel address, for logging/tracing
+   */
+  private subchannelAddressString: string;
+
   /**
    * A class representing a connection to a single backend.
    * @param channelTarget The target string for the channel as a whole
@@ -149,7 +192,7 @@ export class Subchannel {
    */
   constructor(
     private channelTarget: string,
-    private subchannelAddress: string,
+    private subchannelAddress: SubchannelAddress,
     private options: ChannelOptions,
     private credentials: ChannelCredentials
   ) {
@@ -174,7 +217,7 @@ export class Subchannel {
     clearTimeout(this.keepaliveTimeoutId);
     const backoffOptions: BackoffOptions = {
       initialDelay: options['grpc.initial_reconnect_backoff_ms'],
-      maxDelay: options['grpc.max_reconnect_backoff_ms']
+      maxDelay: options['grpc.max_reconnect_backoff_ms'],
     };
     this.backoffTimeout = new BackoffTimeout(() => {
       if (this.continueConnecting) {
@@ -189,6 +232,11 @@ export class Subchannel {
         );
       }
     }, backoffOptions);
+    if (isTcpSubchannelAddress(subchannelAddress)) {
+      this.subchannelAddressString = `${subchannelAddress.host}:${subchannelAddress.port}`;
+    } else {
+      this.subchannelAddressString = `${subchannelAddress.path}`;
+    }
   }
 
   /**
@@ -226,8 +274,8 @@ export class Subchannel {
     clearTimeout(this.keepaliveTimeoutId);
   }
 
-  private createSession(socket?: Socket) {
-    const connectionOptions: http2.SecureClientSessionOptions =
+  private createSession(socket?: net.Socket) {
+    let connectionOptions: http2.SecureClientSessionOptions =
       this.credentials._getConnectionOptions() || {};
     if (socket) {
       connectionOptions.socket = socket;
@@ -252,9 +300,40 @@ export class Subchannel {
       } else {
         connectionOptions.servername = getDefaultAuthority(this.channelTarget);
       }
+    } else {
+      /* In all but the most recent versions of Node, http2.connect does not use
+       * the options when establishing plaintext connections, so we need to
+       * establish that connection explicitly. */
+      connectionOptions.createConnection = (authority, option) => {
+        /* net.NetConnectOpts is declared in a way that is more restrictive
+         * than what net.connect will actually accept, so we use the type
+         * assertion to work around that. */
+        return net.connect(this.subchannelAddress as net.NetConnectOpts);
+      };
     }
+    connectionOptions = Object.assign(
+      connectionOptions,
+      this.subchannelAddress
+    );
+    /* http2.connect uses the options here:
+     * https://github.com/nodejs/node/blob/70c32a6d190e2b5d7b9ff9d5b6a459d14e8b7d59/lib/internal/http2/core.js#L3028-L3036
+     * The spread operator overides earlier values with later ones, so any port
+     * or host values in the options will be used rather than any values extracted
+     * from the first argument. In addition, the path overrides the host and port,
+     * as documented for plaintext connections here:
+     * https://nodejs.org/api/net.html#net_socket_connect_options_connectlistener
+     * and for TLS connections here:
+     * https://nodejs.org/api/tls.html#tls_tls_connect_options_callback. In
+     * earlier versions of Node, http2.connect passes these options to
+     * tls.connect but not net.connect, so in the insecure case we still need
+     * to set the createConnection option above to create the connection
+     * explicitly. We cannot do that in the TLS case because http2.connect
+     * passes necessary additional options to tls.connect.
+     * The first argument just needs to be parseable as a URL and the scheme
+     * determines whether the connection will be established over TLS or not.
+     */
     const session = http2.connect(
-      addressScheme + this.subchannelAddress,
+      addressScheme + getDefaultAuthority(this.channelTarget),
       connectionOptions
     );
     this.session = session;
@@ -345,7 +424,7 @@ export class Subchannel {
       return false;
     }
     trace(
-      this.subchannelAddress +
+      this.subchannelAddressString +
         ' ' +
         ConnectivityState[this.connectivityState] +
         ' -> ' +
@@ -417,7 +496,7 @@ export class Subchannel {
 
   callRef() {
     trace(
-      this.subchannelAddress +
+      this.subchannelAddressString +
         ' callRefcount ' +
         this.callRefcount +
         ' -> ' +
@@ -434,7 +513,7 @@ export class Subchannel {
 
   callUnref() {
     trace(
-      this.subchannelAddress +
+      this.subchannelAddressString +
         ' callRefcount ' +
         this.callRefcount +
         ' -> ' +
@@ -452,7 +531,7 @@ export class Subchannel {
 
   ref() {
     trace(
-      this.subchannelAddress +
+      this.subchannelAddressString +
         ' callRefcount ' +
         this.refcount +
         ' -> ' +
@@ -463,7 +542,7 @@ export class Subchannel {
 
   unref() {
     trace(
-      this.subchannelAddress +
+      this.subchannelAddressString +
         ' callRefcount ' +
         this.refcount +
         ' -> ' +
@@ -574,6 +653,6 @@ export class Subchannel {
   }
 
   getAddress(): string {
-    return this.subchannelAddress;
+    return this.subchannelAddressString;
   }
 }
diff --git a/packages/grpc-js/src/tls-helpers.ts b/packages/grpc-js/src/tls-helpers.ts
index 161666ed..3f7a62e7 100644
--- a/packages/grpc-js/src/tls-helpers.ts
+++ b/packages/grpc-js/src/tls-helpers.ts
@@ -17,7 +17,8 @@
 
 import * as fs from 'fs';
 
-export const CIPHER_SUITES: string | undefined = process.env.GRPC_SSL_CIPHER_SUITES;
+export const CIPHER_SUITES: string | undefined =
+  process.env.GRPC_SSL_CIPHER_SUITES;
 
 const DEFAULT_ROOTS_FILE_PATH = process.env.GRPC_DEFAULT_SSL_ROOTS_FILE_PATH;
 
@@ -31,4 +32,4 @@ export function getDefaultRootsData(): Buffer | null {
     return defaultRootsData;
   }
   return null;
-}
\ No newline at end of file
+}
diff --git a/packages/grpc-js/test/test-resolver.ts b/packages/grpc-js/test/test-resolver.ts
index 951291a6..ebb4d567 100644
--- a/packages/grpc-js/test/test-resolver.ts
+++ b/packages/grpc-js/test/test-resolver.ts
@@ -21,6 +21,7 @@ import * as assert from 'assert';
 import * as resolverManager from '../src/resolver';
 import { ServiceConfig } from '../src/service-config';
 import { StatusObject } from '../src/call-stream';
+import { SubchannelAddress, isTcpSubchannelAddress } from '../src/subchannel';
 
 describe('Name Resolver', () => {
   describe('DNS Names', function() {
@@ -33,11 +34,18 @@ describe('Name Resolver', () => {
       const target = 'localhost:50051';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
-          assert(addressList.includes('127.0.0.1:50051'));
+          assert(
+            addressList.some(
+              addr =>
+                isTcpSubchannelAddress(addr) &&
+                addr.host === '127.0.0.1' &&
+                addr.port === 50051
+            )
+          );
           // We would check for the IPv6 address but it needs to be omitted on some Node versions
           done();
         },
@@ -52,11 +60,18 @@ describe('Name Resolver', () => {
       const target = 'localhost';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
-          assert(addressList.includes('127.0.0.1:443'));
+          assert(
+            addressList.some(
+              addr =>
+                isTcpSubchannelAddress(addr) &&
+                addr.host === '127.0.0.1' &&
+                addr.port === 443
+            )
+          );
           // We would check for the IPv6 address but it needs to be omitted on some Node versions
           done();
         },
@@ -71,11 +86,18 @@ describe('Name Resolver', () => {
       const target = '1.2.3.4';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
-          assert(addressList.includes('1.2.3.4:443'));
+          assert(
+            addressList.some(
+              addr =>
+                isTcpSubchannelAddress(addr) &&
+                addr.host === '1.2.3.4' &&
+                addr.port === 443
+            )
+          );
           // We would check for the IPv6 address but it needs to be omitted on some Node versions
           done();
         },
@@ -90,11 +112,18 @@ describe('Name Resolver', () => {
       const target = '::1';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
-          assert(addressList.includes('[::1]:443'));
+          assert(
+            addressList.some(
+              addr =>
+                isTcpSubchannelAddress(addr) &&
+                addr.host === '::1' &&
+                addr.port === 443
+            )
+          );
           // We would check for the IPv6 address but it needs to be omitted on some Node versions
           done();
         },
@@ -109,11 +138,18 @@ describe('Name Resolver', () => {
       const target = '[::1]:50051';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
-          assert(addressList.includes('[::1]:50051'));
+          assert(
+            addressList.some(
+              addr =>
+                isTcpSubchannelAddress(addr) &&
+                addr.host === '::1' &&
+                addr.port === 50051
+            )
+          );
           // We would check for the IPv6 address but it needs to be omitted on some Node versions
           done();
         },
@@ -128,7 +164,7 @@ describe('Name Resolver', () => {
       const target = 'example.com';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
@@ -146,7 +182,7 @@ describe('Name Resolver', () => {
       const target = 'loopback4.unittest.grpc.io';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
@@ -166,7 +202,7 @@ describe('Name Resolver', () => {
       const target = 'network-tools.com';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
@@ -196,7 +232,7 @@ describe('Name Resolver', () => {
       const target2 = 'grpc-test4.sandbox.googleapis.com';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
@@ -218,11 +254,15 @@ describe('Name Resolver', () => {
       const target = 'unix:socket';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
-          assert(addressList.includes('socket'));
+          assert(
+            addressList.some(
+              addr => !isTcpSubchannelAddress(addr) && addr.path === 'socket'
+            )
+          );
           done();
         },
         onError: (error: StatusObject) => {
@@ -236,11 +276,16 @@ describe('Name Resolver', () => {
       const target = 'unix:///tmp/socket';
       const listener: resolverManager.ResolverListener = {
         onSuccessfulResolution: (
-          addressList: string[],
+          addressList: SubchannelAddress[],
           serviceConfig: ServiceConfig | null,
           serviceConfigError: StatusObject | null
         ) => {
-          assert(addressList.includes('/tmp/socket'));
+          assert(
+            addressList.some(
+              addr =>
+                !isTcpSubchannelAddress(addr) && addr.path === '/tmp/socket'
+            )
+          );
           done();
         },
         onError: (error: StatusObject) => {
diff --git a/packages/grpc-native-core/tools/run_tests/artifacts/build_all_linux_artifacts.sh b/packages/grpc-native-core/tools/run_tests/artifacts/build_all_linux_artifacts.sh
index 26df28bd..1700f393 100755
--- a/packages/grpc-native-core/tools/run_tests/artifacts/build_all_linux_artifacts.sh
+++ b/packages/grpc-native-core/tools/run_tests/artifacts/build_all_linux_artifacts.sh
@@ -70,6 +70,7 @@ fi
 
 if [ "$DO_CROSS" = "true" ] ; then
   $tool_dir/build_artifact_node_arm.sh
+  $tool_dir/build_artifact_node_s390x.sh
 
   docker build -t alpine_node_artifact $base_dir/tools/docker/alpine_artifact
   docker run -e JOBS=8 -e ARTIFACTS_OUT=/var/grpc/artifacts -v $base_dir:/var/grpc alpine_node_artifact /var/grpc/tools/run_tests/artifacts/build_artifact_node.sh --with-alpine
diff --git a/packages/grpc-native-core/tools/run_tests/artifacts/build_artifact_node_s390x.sh b/packages/grpc-native-core/tools/run_tests/artifacts/build_artifact_node_s390x.sh
new file mode 100755
index 00000000..818d9663
--- /dev/null
+++ b/packages/grpc-native-core/tools/run_tests/artifacts/build_artifact_node_s390x.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+set -ex
+
+# https://github.com/mapbox/node-pre-gyp/issues/362
+npm install -g node-gyp
+
+cd $(dirname $0)/../../..
+
+rm -rf build || true
+
+mkdir -p "${ARTIFACTS_OUT}"
+
+npm update
+
+node_versions=( 4.0.0 5.0.0 6.0.0 7.0.0 8.0.0 9.0.0 10.0.0 11.0.0 12.0.0 13.0.0 )
+
+for version in ${node_versions[@]}
+do
+  # Cross compile for s390x on x64
+  # Requires debian or ubuntu packages "g++-s390x-linux-gnu".
+  CC=s390x-linux-gnu-gcc CXX=s390x-linux-gnu-g++ LD=s390x-linux-gnu-g++ ./node_modules/.bin/node-pre-gyp configure rebuild package testpackage --target=$version --target_arch=s390x
+  cp -r build/stage/* "${ARTIFACTS_OUT}"/
+done
diff --git a/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh b/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh
new file mode 100755
index 00000000..dbfd2a9c
--- /dev/null
+++ b/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash
+export NVM_DIR="$HOME/.nvm"
+[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+
+nvm install 10
+nvm use 10
+npm install -g npm
+# https://github.com/mapbox/node-pre-gyp/issues/362
+npm install -g node-gyp
+
+set -ex
+cd $(dirname $0)/../../../../..
+base_dir=$(pwd)
+
+cd $base_dir/packages/grpc-native-core
+
+# Install gRPC and its submodules.
+git submodule update --init --recursive
+
+pip install mako
+./tools/buildgen/generate_projects.sh
+
+export JOBS=8
+export ARTIFACTS_OUT=$base_dir/artifacts
+
+mkdir -p ${ARTIFACTS_OUT}
+
+rm -rf build || true
+
+npm update
+
+case $RUNTIME in
+  electron)
+    HOME=~/.electron-gyp ./node_modules/.bin/node-pre-gyp configure rebuild package --runtime=electron --target=$VERSION --target_arch=$ARCH --disturl=https://atom.io/download/electron
+    cp -r build/stage/* "${ARTIFACTS_OUT}"/
+    ;;
+  node)
+    ./node_modules/.bin/node-pre-gyp configure rebuild package --target=$VERSION --target_arch=$ARCH
+    cp -r build/stage/* "${ARTIFACTS_OUT}"/
+    ;;
+esac
\ No newline at end of file
diff --git a/packages/grpc-native-core/tools/run_tests/artifacts/workflow.sh b/packages/grpc-native-core/tools/run_tests/artifacts/workflow.sh
new file mode 100644
index 00000000..20c5ec54
--- /dev/null
+++ b/packages/grpc-native-core/tools/run_tests/artifacts/workflow.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/test/api/connectivity_test.js b/test/api/connectivity_test.js
index 042c136b..b5d31943 100644
--- a/test/api/connectivity_test.js
+++ b/test/api/connectivity_test.js
@@ -59,6 +59,29 @@ const serviceImpl = {
 };
 
 describe(`${anyGrpc.clientName} client -> ${anyGrpc.serverName} server`, function() {
+  it('client should not wait for ready by default', function(done) {
+    this.timeout(15000);
+    const disconnectedClient = new TestServiceClient('foo.test.google.com:50051', clientGrpc.credentials.createInsecure());
+    const deadline = new Date();
+    deadline.setSeconds(deadline.getSeconds() + 10);
+    disconnectedClient.unary({}, {deadline: deadline}, (error, value) =>{
+      assert(error);
+      assert.strictEqual(error.code, clientGrpc.status.UNAVAILABLE);
+      done();
+    });
+  });
+  it('client should wait for a connection with waitForReady on', function(done) {
+    this.timeout(15000);
+    const disconnectedClient = new TestServiceClient('foo.test.google.com:50051', clientGrpc.credentials.createInsecure());
+    const metadata = new clientGrpc.Metadata({waitForReady: true});
+    const deadline = new Date();
+    deadline.setSeconds(deadline.getSeconds() + 10);
+    disconnectedClient.unary({}, metadata, {deadline: deadline}, (error, value) =>{
+      assert(error);
+      assert.strictEqual(error.code, clientGrpc.status.DEADLINE_EXCEEDED);
+      done();
+    });
+  });
   describe('Reconnection', function() {
     let server1;
     let server2;
diff --git a/tools/release/cross/Dockerfile b/tools/release/cross/Dockerfile
index 7dabff9a..1e931250 100644
--- a/tools/release/cross/Dockerfile
+++ b/tools/release/cross/Dockerfile
@@ -2,7 +2,7 @@ FROM debian:stretch
 
 RUN dpkg --add-architecture i386
 RUN apt-get update
-RUN apt-get install -y curl build-essential g++-aarch64-linux-gnu g++-arm-linux-gnueabihf python libc6-dev:i386 lib32stdc++-6-dev
+RUN apt-get install -y curl build-essential g++-aarch64-linux-gnu g++-arm-linux-gnueabihf g++-s390x-linux-gnu python libc6-dev:i386 lib32stdc++-6-dev
 RUN curl -fsSL get.docker.com | bash
 
 RUN mkdir /usr/local/nvm
diff --git a/tools/release/kokoro/macos.cfg b/tools/release/kokoro/macos.cfg
new file mode 100644
index 00000000..b52902e5
--- /dev/null
+++ b/tools/release/kokoro/macos.cfg
@@ -0,0 +1,17 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/workflow.sh"
diff --git a/tools/release/kokoro/macos/electron_1.0_ia32.cfg b/tools/release/kokoro/macos/electron_1.0_ia32.cfg
new file mode 100644
index 00000000..c14493f1
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.0_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.0_x64.cfg b/tools/release/kokoro/macos/electron_1.0_x64.cfg
new file mode 100644
index 00000000..de01b329
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.0_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.1_ia32.cfg b/tools/release/kokoro/macos/electron_1.1_ia32.cfg
new file mode 100644
index 00000000..71c370c4
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.1_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.1_x64.cfg b/tools/release/kokoro/macos/electron_1.1_x64.cfg
new file mode 100644
index 00000000..10f9a525
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.1_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.2_ia32.cfg b/tools/release/kokoro/macos/electron_1.2_ia32.cfg
new file mode 100644
index 00000000..3c2136b7
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.2_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.2.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.2_x64.cfg b/tools/release/kokoro/macos/electron_1.2_x64.cfg
new file mode 100644
index 00000000..06f2ce56
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.2_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.2.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.3_ia32.cfg b/tools/release/kokoro/macos/electron_1.3_ia32.cfg
new file mode 100644
index 00000000..cdaace0d
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.3_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.3.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.3_x64.cfg b/tools/release/kokoro/macos/electron_1.3_x64.cfg
new file mode 100644
index 00000000..59241ec3
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.3_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.3.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.4_ia32.cfg b/tools/release/kokoro/macos/electron_1.4_ia32.cfg
new file mode 100644
index 00000000..f4359b6c
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.4_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.4.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.4_x64.cfg b/tools/release/kokoro/macos/electron_1.4_x64.cfg
new file mode 100644
index 00000000..eadc22a2
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.4_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.4.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.5_ia32.cfg b/tools/release/kokoro/macos/electron_1.5_ia32.cfg
new file mode 100644
index 00000000..e70c18c0
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.5_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.5.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.5_x64.cfg b/tools/release/kokoro/macos/electron_1.5_x64.cfg
new file mode 100644
index 00000000..d2382a17
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.5_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.5.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.6_ia32.cfg b/tools/release/kokoro/macos/electron_1.6_ia32.cfg
new file mode 100644
index 00000000..f074428f
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.6_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.6.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.6_x64.cfg b/tools/release/kokoro/macos/electron_1.6_x64.cfg
new file mode 100644
index 00000000..0c93e0d7
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.6_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.6.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.7_ia32.cfg b/tools/release/kokoro/macos/electron_1.7_ia32.cfg
new file mode 100644
index 00000000..48d53103
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.7_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.7.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.7_x64.cfg b/tools/release/kokoro/macos/electron_1.7_x64.cfg
new file mode 100644
index 00000000..bdef8d3f
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.7_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.7.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.8_ia32.cfg b/tools/release/kokoro/macos/electron_1.8_ia32.cfg
new file mode 100644
index 00000000..a0455a72
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.8_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.8.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_1.8_x64.cfg b/tools/release/kokoro/macos/electron_1.8_x64.cfg
new file mode 100644
index 00000000..94b3a0cf
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_1.8_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "1.8.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_2.0_ia32.cfg b/tools/release/kokoro/macos/electron_2.0_ia32.cfg
new file mode 100644
index 00000000..137d8ec2
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_2.0_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "2.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_2.0_x64.cfg b/tools/release/kokoro/macos/electron_2.0_x64.cfg
new file mode 100644
index 00000000..f70f742e
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_2.0_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "2.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_3.0_ia32.cfg b/tools/release/kokoro/macos/electron_3.0_ia32.cfg
new file mode 100644
index 00000000..eee4f303
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_3.0_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "3.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_3.0_x64.cfg b/tools/release/kokoro/macos/electron_3.0_x64.cfg
new file mode 100644
index 00000000..52df13a8
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_3.0_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "3.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_3.1_ia32.cfg b/tools/release/kokoro/macos/electron_3.1_ia32.cfg
new file mode 100644
index 00000000..12785e3b
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_3.1_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "3.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_3.1_x64.cfg b/tools/release/kokoro/macos/electron_3.1_x64.cfg
new file mode 100644
index 00000000..02d1a8d3
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_3.1_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "3.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_4.1_ia32.cfg b/tools/release/kokoro/macos/electron_4.1_ia32.cfg
new file mode 100644
index 00000000..33cf881e
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_4.1_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "4.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_4.1_x64.cfg b/tools/release/kokoro/macos/electron_4.1_x64.cfg
new file mode 100644
index 00000000..5553bce7
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_4.1_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "4.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_4.2_ia32.cfg b/tools/release/kokoro/macos/electron_4.2_ia32.cfg
new file mode 100644
index 00000000..41746c21
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_4.2_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "4.2.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_4.2_x64.cfg b/tools/release/kokoro/macos/electron_4.2_x64.cfg
new file mode 100644
index 00000000..b6cf5a70
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_4.2_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "4.2.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_5.0_ia32.cfg b/tools/release/kokoro/macos/electron_5.0_ia32.cfg
new file mode 100644
index 00000000..e59cf6a6
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_5.0_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "5.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_5.0_x64.cfg b/tools/release/kokoro/macos/electron_5.0_x64.cfg
new file mode 100644
index 00000000..47de1345
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_5.0_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "5.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_6.0_ia32.cfg b/tools/release/kokoro/macos/electron_6.0_ia32.cfg
new file mode 100644
index 00000000..10ca9f5e
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_6.0_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "6.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_6.0_x64.cfg b/tools/release/kokoro/macos/electron_6.0_x64.cfg
new file mode 100644
index 00000000..312c27d9
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_6.0_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "6.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_6.1_ia32.cfg b/tools/release/kokoro/macos/electron_6.1_ia32.cfg
new file mode 100644
index 00000000..45ed07c5
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_6.1_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "6.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_6.1_x64.cfg b/tools/release/kokoro/macos/electron_6.1_x64.cfg
new file mode 100644
index 00000000..e5167655
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_6.1_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "6.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_7.0_ia32.cfg b/tools/release/kokoro/macos/electron_7.0_ia32.cfg
new file mode 100644
index 00000000..5824649e
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_7.0_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "7.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_7.0_x64.cfg b/tools/release/kokoro/macos/electron_7.0_x64.cfg
new file mode 100644
index 00000000..38688281
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_7.0_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "7.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_7.1_ia32.cfg b/tools/release/kokoro/macos/electron_7.1_ia32.cfg
new file mode 100644
index 00000000..4a81c57e
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_7.1_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "7.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/electron_7.1_x64.cfg b/tools/release/kokoro/macos/electron_7.1_x64.cfg
new file mode 100644
index 00000000..a8671b17
--- /dev/null
+++ b/tools/release/kokoro/macos/electron_7.1_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "electron"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "7.1.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_10_ia32.cfg b/tools/release/kokoro/macos/node_10_ia32.cfg
new file mode 100644
index 00000000..fd1102df
--- /dev/null
+++ b/tools/release/kokoro/macos/node_10_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "10.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_10_x64.cfg b/tools/release/kokoro/macos/node_10_x64.cfg
new file mode 100644
index 00000000..ca306e12
--- /dev/null
+++ b/tools/release/kokoro/macos/node_10_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "10.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_11_ia32.cfg b/tools/release/kokoro/macos/node_11_ia32.cfg
new file mode 100644
index 00000000..ecd4f3d0
--- /dev/null
+++ b/tools/release/kokoro/macos/node_11_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "11.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_11_x64.cfg b/tools/release/kokoro/macos/node_11_x64.cfg
new file mode 100644
index 00000000..80542311
--- /dev/null
+++ b/tools/release/kokoro/macos/node_11_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "11.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_12_ia32.cfg b/tools/release/kokoro/macos/node_12_ia32.cfg
new file mode 100644
index 00000000..7bf3a9a3
--- /dev/null
+++ b/tools/release/kokoro/macos/node_12_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "12.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_12_x64.cfg b/tools/release/kokoro/macos/node_12_x64.cfg
new file mode 100644
index 00000000..a4d7c8d0
--- /dev/null
+++ b/tools/release/kokoro/macos/node_12_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "12.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_13_ia32.cfg b/tools/release/kokoro/macos/node_13_ia32.cfg
new file mode 100644
index 00000000..7fe3a4ea
--- /dev/null
+++ b/tools/release/kokoro/macos/node_13_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "13.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_13_x64.cfg b/tools/release/kokoro/macos/node_13_x64.cfg
new file mode 100644
index 00000000..156eb6cf
--- /dev/null
+++ b/tools/release/kokoro/macos/node_13_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "13.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_4_ia32.cfg b/tools/release/kokoro/macos/node_4_ia32.cfg
new file mode 100644
index 00000000..1411ea92
--- /dev/null
+++ b/tools/release/kokoro/macos/node_4_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "4.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_4_x64.cfg b/tools/release/kokoro/macos/node_4_x64.cfg
new file mode 100644
index 00000000..8a330ce5
--- /dev/null
+++ b/tools/release/kokoro/macos/node_4_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "4.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_5_ia32.cfg b/tools/release/kokoro/macos/node_5_ia32.cfg
new file mode 100644
index 00000000..f99f3b69
--- /dev/null
+++ b/tools/release/kokoro/macos/node_5_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "5.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_5_x64.cfg b/tools/release/kokoro/macos/node_5_x64.cfg
new file mode 100644
index 00000000..f1436c2f
--- /dev/null
+++ b/tools/release/kokoro/macos/node_5_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "5.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_6_ia32.cfg b/tools/release/kokoro/macos/node_6_ia32.cfg
new file mode 100644
index 00000000..2381480d
--- /dev/null
+++ b/tools/release/kokoro/macos/node_6_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "6.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_6_x64.cfg b/tools/release/kokoro/macos/node_6_x64.cfg
new file mode 100644
index 00000000..10b657ee
--- /dev/null
+++ b/tools/release/kokoro/macos/node_6_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "6.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_7_ia32.cfg b/tools/release/kokoro/macos/node_7_ia32.cfg
new file mode 100644
index 00000000..9841a4a2
--- /dev/null
+++ b/tools/release/kokoro/macos/node_7_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "7.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_7_x64.cfg b/tools/release/kokoro/macos/node_7_x64.cfg
new file mode 100644
index 00000000..a46516bb
--- /dev/null
+++ b/tools/release/kokoro/macos/node_7_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "7.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_8_ia32.cfg b/tools/release/kokoro/macos/node_8_ia32.cfg
new file mode 100644
index 00000000..4c6f268c
--- /dev/null
+++ b/tools/release/kokoro/macos/node_8_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "8.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_8_x64.cfg b/tools/release/kokoro/macos/node_8_x64.cfg
new file mode 100644
index 00000000..2034ac8d
--- /dev/null
+++ b/tools/release/kokoro/macos/node_8_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "8.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_9_ia32.cfg b/tools/release/kokoro/macos/node_9_ia32.cfg
new file mode 100644
index 00000000..f51cf728
--- /dev/null
+++ b/tools/release/kokoro/macos/node_9_ia32.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "ia32"
+}
+env_vars {
+  key: "VERSION"
+  value: "9.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}
diff --git a/tools/release/kokoro/macos/node_9_x64.cfg b/tools/release/kokoro/macos/node_9_x64.cfg
new file mode 100644
index 00000000..083e1ee8
--- /dev/null
+++ b/tools/release/kokoro/macos/node_9_x64.cfg
@@ -0,0 +1,35 @@
+# Copyright 2020 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for Kokoro (in protobuf text format)
+
+build_file: "grpc-node/packages/grpc-native-core/tools/run_tests/artifacts/build_one_artifact_macos.sh"
+env_vars {
+  key: "RUNTIME"
+  value: "node"
+}
+env_vars {
+  key: "ARCH"
+  value: "x64"
+}
+env_vars {
+  key: "VERSION"
+  value: "9.0.0"
+}
+action {
+  define_artifacts {
+    regex: "github/grpc-node/artifacts/**",
+    strip_prefix: "github/grpc-node/artifacts"
+  }
+}