mirror of https://github.com/grpc/grpc-go.git
568 lines
18 KiB
Go
568 lines
18 KiB
Go
/*
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
package clustermanager
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/google/go-cmp/cmp"
|
|
"google.golang.org/grpc/balancer"
|
|
"google.golang.org/grpc/balancer/roundrobin"
|
|
"google.golang.org/grpc/codes"
|
|
"google.golang.org/grpc/connectivity"
|
|
"google.golang.org/grpc/credentials/insecure"
|
|
"google.golang.org/grpc/internal/balancer/stub"
|
|
"google.golang.org/grpc/internal/grpctest"
|
|
"google.golang.org/grpc/internal/hierarchy"
|
|
itestutils "google.golang.org/grpc/internal/testutils"
|
|
"google.golang.org/grpc/resolver"
|
|
"google.golang.org/grpc/status"
|
|
"google.golang.org/grpc/xds/internal/balancer/balancergroup"
|
|
"google.golang.org/grpc/xds/internal/testutils"
|
|
)
|
|
|
|
type s struct {
|
|
grpctest.Tester
|
|
}
|
|
|
|
func Test(t *testing.T) {
|
|
grpctest.RunSubTests(t, s{})
|
|
}
|
|
|
|
var (
|
|
rtBuilder balancer.Builder
|
|
rtParser balancer.ConfigParser
|
|
testBackendAddrStrs []string
|
|
)
|
|
|
|
const ignoreAttrsRRName = "ignore_attrs_round_robin"
|
|
|
|
type ignoreAttrsRRBuilder struct {
|
|
balancer.Builder
|
|
}
|
|
|
|
func (trrb *ignoreAttrsRRBuilder) Build(cc balancer.ClientConn, opts balancer.BuildOptions) balancer.Balancer {
|
|
return &ignoreAttrsRRBalancer{trrb.Builder.Build(cc, opts)}
|
|
}
|
|
|
|
func (*ignoreAttrsRRBuilder) Name() string {
|
|
return ignoreAttrsRRName
|
|
}
|
|
|
|
// ignoreAttrsRRBalancer clears attributes from all addresses.
|
|
//
|
|
// It's necessary in this tests because hierarchy modifies address.Attributes.
|
|
// Even if rr gets addresses with empty hierarchy, the attributes fields are
|
|
// different. This is a temporary walkaround for the tests to ignore attributes.
|
|
// Eventually, we need a way for roundrobin to know that two addresses with
|
|
// empty attributes are equal.
|
|
//
|
|
// TODO: delete this when the issue is resolved:
|
|
// https://github.com/grpc/grpc-go/issues/3611.
|
|
type ignoreAttrsRRBalancer struct {
|
|
balancer.Balancer
|
|
}
|
|
|
|
func (trrb *ignoreAttrsRRBalancer) UpdateClientConnState(s balancer.ClientConnState) error {
|
|
var newAddrs []resolver.Address
|
|
for _, a := range s.ResolverState.Addresses {
|
|
a.Attributes = nil
|
|
newAddrs = append(newAddrs, a)
|
|
}
|
|
s.ResolverState.Addresses = newAddrs
|
|
return trrb.Balancer.UpdateClientConnState(s)
|
|
}
|
|
|
|
const testBackendAddrsCount = 12
|
|
|
|
func init() {
|
|
for i := 0; i < testBackendAddrsCount; i++ {
|
|
testBackendAddrStrs = append(testBackendAddrStrs, fmt.Sprintf("%d.%d.%d.%d:%d", i, i, i, i, i))
|
|
}
|
|
rtBuilder = balancer.Get(balancerName)
|
|
rtParser = rtBuilder.(balancer.ConfigParser)
|
|
|
|
balancer.Register(&ignoreAttrsRRBuilder{balancer.Get(roundrobin.Name)})
|
|
|
|
balancergroup.DefaultSubBalancerCloseTimeout = time.Millisecond
|
|
}
|
|
|
|
func testPick(t *testing.T, p balancer.Picker, info balancer.PickInfo, wantSC balancer.SubConn, wantErr error) {
|
|
t.Helper()
|
|
for i := 0; i < 5; i++ {
|
|
gotSCSt, err := p.Pick(info)
|
|
if fmt.Sprint(err) != fmt.Sprint(wantErr) {
|
|
t.Fatalf("picker.Pick(%+v), got error %v, want %v", info, err, wantErr)
|
|
}
|
|
if !cmp.Equal(gotSCSt.SubConn, wantSC, cmp.AllowUnexported(testutils.TestSubConn{})) {
|
|
t.Fatalf("picker.Pick(%+v), got %v, want SubConn=%v", info, gotSCSt, wantSC)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestClusterPicks(t *testing.T) {
|
|
cc := testutils.NewTestClientConn(t)
|
|
rtb := rtBuilder.Build(cc, balancer.BuildOptions{})
|
|
|
|
configJSON1 := `{
|
|
"children": {
|
|
"cds:cluster_1":{ "childPolicy": [{"ignore_attrs_round_robin":""}] },
|
|
"cds:cluster_2":{ "childPolicy": [{"ignore_attrs_round_robin":""}] }
|
|
}
|
|
}`
|
|
|
|
config1, err := rtParser.ParseConfig([]byte(configJSON1))
|
|
if err != nil {
|
|
t.Fatalf("failed to parse balancer config: %v", err)
|
|
}
|
|
|
|
// Send the config, and an address with hierarchy path ["cluster_1"].
|
|
wantAddrs := []resolver.Address{
|
|
{Addr: testBackendAddrStrs[0], Attributes: nil},
|
|
{Addr: testBackendAddrStrs[1], Attributes: nil},
|
|
}
|
|
if err := rtb.UpdateClientConnState(balancer.ClientConnState{
|
|
ResolverState: resolver.State{Addresses: []resolver.Address{
|
|
hierarchy.Set(wantAddrs[0], []string{"cds:cluster_1"}),
|
|
hierarchy.Set(wantAddrs[1], []string{"cds:cluster_2"}),
|
|
}},
|
|
BalancerConfig: config1,
|
|
}); err != nil {
|
|
t.Fatalf("failed to update ClientConn state: %v", err)
|
|
}
|
|
|
|
m1 := make(map[resolver.Address]balancer.SubConn)
|
|
// Verify that a subconn is created with the address, and the hierarchy path
|
|
// in the address is cleared.
|
|
for range wantAddrs {
|
|
addrs := <-cc.NewSubConnAddrsCh
|
|
if len(hierarchy.Get(addrs[0])) != 0 {
|
|
t.Fatalf("NewSubConn with address %+v, attrs %+v, want address with hierarchy cleared", addrs[0], addrs[0].Attributes)
|
|
}
|
|
sc := <-cc.NewSubConnCh
|
|
// Clear the attributes before adding to map.
|
|
addrs[0].Attributes = nil
|
|
m1[addrs[0]] = sc
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Connecting})
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Ready})
|
|
}
|
|
|
|
p1 := <-cc.NewPickerCh
|
|
for _, tt := range []struct {
|
|
pickInfo balancer.PickInfo
|
|
wantSC balancer.SubConn
|
|
wantErr error
|
|
}{
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_1"),
|
|
},
|
|
wantSC: m1[wantAddrs[0]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_2"),
|
|
},
|
|
wantSC: m1[wantAddrs[1]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "notacluster"),
|
|
},
|
|
wantErr: status.Errorf(codes.Unavailable, `unknown cluster selected for RPC: "notacluster"`),
|
|
},
|
|
} {
|
|
testPick(t, p1, tt.pickInfo, tt.wantSC, tt.wantErr)
|
|
}
|
|
}
|
|
|
|
// TestConfigUpdateAddCluster covers the cases the balancer receives config
|
|
// update with extra clusters.
|
|
func TestConfigUpdateAddCluster(t *testing.T) {
|
|
cc := testutils.NewTestClientConn(t)
|
|
rtb := rtBuilder.Build(cc, balancer.BuildOptions{})
|
|
|
|
configJSON1 := `{
|
|
"children": {
|
|
"cds:cluster_1":{ "childPolicy": [{"ignore_attrs_round_robin":""}] },
|
|
"cds:cluster_2":{ "childPolicy": [{"ignore_attrs_round_robin":""}] }
|
|
}
|
|
}`
|
|
|
|
config1, err := rtParser.ParseConfig([]byte(configJSON1))
|
|
if err != nil {
|
|
t.Fatalf("failed to parse balancer config: %v", err)
|
|
}
|
|
|
|
// Send the config, and an address with hierarchy path ["cluster_1"].
|
|
wantAddrs := []resolver.Address{
|
|
{Addr: testBackendAddrStrs[0], Attributes: nil},
|
|
{Addr: testBackendAddrStrs[1], Attributes: nil},
|
|
}
|
|
if err := rtb.UpdateClientConnState(balancer.ClientConnState{
|
|
ResolverState: resolver.State{Addresses: []resolver.Address{
|
|
hierarchy.Set(wantAddrs[0], []string{"cds:cluster_1"}),
|
|
hierarchy.Set(wantAddrs[1], []string{"cds:cluster_2"}),
|
|
}},
|
|
BalancerConfig: config1,
|
|
}); err != nil {
|
|
t.Fatalf("failed to update ClientConn state: %v", err)
|
|
}
|
|
|
|
m1 := make(map[resolver.Address]balancer.SubConn)
|
|
// Verify that a subconn is created with the address, and the hierarchy path
|
|
// in the address is cleared.
|
|
for range wantAddrs {
|
|
addrs := <-cc.NewSubConnAddrsCh
|
|
if len(hierarchy.Get(addrs[0])) != 0 {
|
|
t.Fatalf("NewSubConn with address %+v, attrs %+v, want address with hierarchy cleared", addrs[0], addrs[0].Attributes)
|
|
}
|
|
sc := <-cc.NewSubConnCh
|
|
// Clear the attributes before adding to map.
|
|
addrs[0].Attributes = nil
|
|
m1[addrs[0]] = sc
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Connecting})
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Ready})
|
|
}
|
|
|
|
p1 := <-cc.NewPickerCh
|
|
for _, tt := range []struct {
|
|
pickInfo balancer.PickInfo
|
|
wantSC balancer.SubConn
|
|
wantErr error
|
|
}{
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_1"),
|
|
},
|
|
wantSC: m1[wantAddrs[0]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_2"),
|
|
},
|
|
wantSC: m1[wantAddrs[1]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:notacluster"),
|
|
},
|
|
wantErr: status.Errorf(codes.Unavailable, `unknown cluster selected for RPC: "cds:notacluster"`),
|
|
},
|
|
} {
|
|
testPick(t, p1, tt.pickInfo, tt.wantSC, tt.wantErr)
|
|
}
|
|
|
|
// A config update with different routes, and different actions. Expect a
|
|
// new subconn and a picker update.
|
|
configJSON2 := `{
|
|
"children": {
|
|
"cds:cluster_1":{ "childPolicy": [{"ignore_attrs_round_robin":""}] },
|
|
"cds:cluster_2":{ "childPolicy": [{"ignore_attrs_round_robin":""}] },
|
|
"cds:cluster_3":{ "childPolicy": [{"ignore_attrs_round_robin":""}] }
|
|
}
|
|
}`
|
|
config2, err := rtParser.ParseConfig([]byte(configJSON2))
|
|
if err != nil {
|
|
t.Fatalf("failed to parse balancer config: %v", err)
|
|
}
|
|
wantAddrs = append(wantAddrs, resolver.Address{Addr: testBackendAddrStrs[2], Attributes: nil})
|
|
if err := rtb.UpdateClientConnState(balancer.ClientConnState{
|
|
ResolverState: resolver.State{Addresses: []resolver.Address{
|
|
hierarchy.Set(wantAddrs[0], []string{"cds:cluster_1"}),
|
|
hierarchy.Set(wantAddrs[1], []string{"cds:cluster_2"}),
|
|
hierarchy.Set(wantAddrs[2], []string{"cds:cluster_3"}),
|
|
}},
|
|
BalancerConfig: config2,
|
|
}); err != nil {
|
|
t.Fatalf("failed to update ClientConn state: %v", err)
|
|
}
|
|
|
|
// Expect exactly one new subconn.
|
|
addrs := <-cc.NewSubConnAddrsCh
|
|
if len(hierarchy.Get(addrs[0])) != 0 {
|
|
t.Fatalf("NewSubConn with address %+v, attrs %+v, want address with hierarchy cleared", addrs[0], addrs[0].Attributes)
|
|
}
|
|
sc := <-cc.NewSubConnCh
|
|
// Clear the attributes before adding to map.
|
|
addrs[0].Attributes = nil
|
|
m1[addrs[0]] = sc
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Connecting})
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Ready})
|
|
|
|
// Should have no more newSubConn.
|
|
select {
|
|
case <-time.After(time.Millisecond * 500):
|
|
case <-cc.NewSubConnCh:
|
|
addrs := <-cc.NewSubConnAddrsCh
|
|
t.Fatalf("unexpected NewSubConn with address %v", addrs)
|
|
}
|
|
|
|
p2 := <-cc.NewPickerCh
|
|
for _, tt := range []struct {
|
|
pickInfo balancer.PickInfo
|
|
wantSC balancer.SubConn
|
|
wantErr error
|
|
}{
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_1"),
|
|
},
|
|
wantSC: m1[wantAddrs[0]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_2"),
|
|
},
|
|
wantSC: m1[wantAddrs[1]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_3"),
|
|
},
|
|
wantSC: m1[wantAddrs[2]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:notacluster"),
|
|
},
|
|
wantErr: status.Errorf(codes.Unavailable, `unknown cluster selected for RPC: "cds:notacluster"`),
|
|
},
|
|
} {
|
|
testPick(t, p2, tt.pickInfo, tt.wantSC, tt.wantErr)
|
|
}
|
|
}
|
|
|
|
// TestRoutingConfigUpdateDeleteAll covers the cases the balancer receives
|
|
// config update with no clusters. Pick should fail with details in error.
|
|
func TestRoutingConfigUpdateDeleteAll(t *testing.T) {
|
|
cc := testutils.NewTestClientConn(t)
|
|
rtb := rtBuilder.Build(cc, balancer.BuildOptions{})
|
|
|
|
configJSON1 := `{
|
|
"children": {
|
|
"cds:cluster_1":{ "childPolicy": [{"ignore_attrs_round_robin":""}] },
|
|
"cds:cluster_2":{ "childPolicy": [{"ignore_attrs_round_robin":""}] }
|
|
}
|
|
}`
|
|
|
|
config1, err := rtParser.ParseConfig([]byte(configJSON1))
|
|
if err != nil {
|
|
t.Fatalf("failed to parse balancer config: %v", err)
|
|
}
|
|
|
|
// Send the config, and an address with hierarchy path ["cluster_1"].
|
|
wantAddrs := []resolver.Address{
|
|
{Addr: testBackendAddrStrs[0], Attributes: nil},
|
|
{Addr: testBackendAddrStrs[1], Attributes: nil},
|
|
}
|
|
if err := rtb.UpdateClientConnState(balancer.ClientConnState{
|
|
ResolverState: resolver.State{Addresses: []resolver.Address{
|
|
hierarchy.Set(wantAddrs[0], []string{"cds:cluster_1"}),
|
|
hierarchy.Set(wantAddrs[1], []string{"cds:cluster_2"}),
|
|
}},
|
|
BalancerConfig: config1,
|
|
}); err != nil {
|
|
t.Fatalf("failed to update ClientConn state: %v", err)
|
|
}
|
|
|
|
m1 := make(map[resolver.Address]balancer.SubConn)
|
|
// Verify that a subconn is created with the address, and the hierarchy path
|
|
// in the address is cleared.
|
|
for range wantAddrs {
|
|
addrs := <-cc.NewSubConnAddrsCh
|
|
if len(hierarchy.Get(addrs[0])) != 0 {
|
|
t.Fatalf("NewSubConn with address %+v, attrs %+v, want address with hierarchy cleared", addrs[0], addrs[0].Attributes)
|
|
}
|
|
sc := <-cc.NewSubConnCh
|
|
// Clear the attributes before adding to map.
|
|
addrs[0].Attributes = nil
|
|
m1[addrs[0]] = sc
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Connecting})
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Ready})
|
|
}
|
|
|
|
p1 := <-cc.NewPickerCh
|
|
for _, tt := range []struct {
|
|
pickInfo balancer.PickInfo
|
|
wantSC balancer.SubConn
|
|
wantErr error
|
|
}{
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_1"),
|
|
},
|
|
wantSC: m1[wantAddrs[0]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_2"),
|
|
},
|
|
wantSC: m1[wantAddrs[1]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:notacluster"),
|
|
},
|
|
wantErr: status.Errorf(codes.Unavailable, `unknown cluster selected for RPC: "cds:notacluster"`),
|
|
},
|
|
} {
|
|
testPick(t, p1, tt.pickInfo, tt.wantSC, tt.wantErr)
|
|
}
|
|
|
|
// A config update with no clusters.
|
|
configJSON2 := `{}`
|
|
config2, err := rtParser.ParseConfig([]byte(configJSON2))
|
|
if err != nil {
|
|
t.Fatalf("failed to parse balancer config: %v", err)
|
|
}
|
|
if err := rtb.UpdateClientConnState(balancer.ClientConnState{
|
|
BalancerConfig: config2,
|
|
}); err != nil {
|
|
t.Fatalf("failed to update ClientConn state: %v", err)
|
|
}
|
|
|
|
// Expect two removed subconns.
|
|
for range wantAddrs {
|
|
select {
|
|
case <-time.After(time.Millisecond * 500):
|
|
t.Fatalf("timeout waiting for remove subconn")
|
|
case <-cc.RemoveSubConnCh:
|
|
}
|
|
}
|
|
|
|
p2 := <-cc.NewPickerCh
|
|
for i := 0; i < 5; i++ {
|
|
gotSCSt, err := p2.Pick(balancer.PickInfo{Ctx: SetPickedCluster(context.Background(), "cds:notacluster")})
|
|
if fmt.Sprint(err) != status.Errorf(codes.Unavailable, `unknown cluster selected for RPC: "cds:notacluster"`).Error() {
|
|
t.Fatalf("picker.Pick, got %v, %v, want error %v", gotSCSt, err, `unknown cluster selected for RPC: "cds:notacluster"`)
|
|
}
|
|
}
|
|
|
|
// Resend the previous config with clusters
|
|
if err := rtb.UpdateClientConnState(balancer.ClientConnState{
|
|
ResolverState: resolver.State{Addresses: []resolver.Address{
|
|
hierarchy.Set(wantAddrs[0], []string{"cds:cluster_1"}),
|
|
hierarchy.Set(wantAddrs[1], []string{"cds:cluster_2"}),
|
|
}},
|
|
BalancerConfig: config1,
|
|
}); err != nil {
|
|
t.Fatalf("failed to update ClientConn state: %v", err)
|
|
}
|
|
|
|
m2 := make(map[resolver.Address]balancer.SubConn)
|
|
// Verify that a subconn is created with the address, and the hierarchy path
|
|
// in the address is cleared.
|
|
for range wantAddrs {
|
|
addrs := <-cc.NewSubConnAddrsCh
|
|
if len(hierarchy.Get(addrs[0])) != 0 {
|
|
t.Fatalf("NewSubConn with address %+v, attrs %+v, want address with hierarchy cleared", addrs[0], addrs[0].Attributes)
|
|
}
|
|
sc := <-cc.NewSubConnCh
|
|
// Clear the attributes before adding to map.
|
|
addrs[0].Attributes = nil
|
|
m2[addrs[0]] = sc
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Connecting})
|
|
rtb.UpdateSubConnState(sc, balancer.SubConnState{ConnectivityState: connectivity.Ready})
|
|
}
|
|
|
|
p3 := <-cc.NewPickerCh
|
|
for _, tt := range []struct {
|
|
pickInfo balancer.PickInfo
|
|
wantSC balancer.SubConn
|
|
wantErr error
|
|
}{
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_1"),
|
|
},
|
|
wantSC: m2[wantAddrs[0]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:cluster_2"),
|
|
},
|
|
wantSC: m2[wantAddrs[1]],
|
|
},
|
|
{
|
|
pickInfo: balancer.PickInfo{
|
|
Ctx: SetPickedCluster(context.Background(), "cds:notacluster"),
|
|
},
|
|
wantErr: status.Errorf(codes.Unavailable, `unknown cluster selected for RPC: "cds:notacluster"`),
|
|
},
|
|
} {
|
|
testPick(t, p3, tt.pickInfo, tt.wantSC, tt.wantErr)
|
|
}
|
|
}
|
|
|
|
func TestClusterManagerForwardsBalancerBuildOptions(t *testing.T) {
|
|
const (
|
|
balancerName = "stubBalancer-TestClusterManagerForwardsBalancerBuildOptions"
|
|
parent = int64(1234)
|
|
userAgent = "ua"
|
|
defaultTestTimeout = 1 * time.Second
|
|
)
|
|
|
|
// Setup the stub balancer such that we can read the build options passed to
|
|
// it in the UpdateClientConnState method.
|
|
ccsCh := itestutils.NewChannel()
|
|
bOpts := balancer.BuildOptions{
|
|
DialCreds: insecure.NewCredentials(),
|
|
ChannelzParentID: parent,
|
|
CustomUserAgent: userAgent,
|
|
}
|
|
stub.Register(balancerName, stub.BalancerFuncs{
|
|
UpdateClientConnState: func(bd *stub.BalancerData, _ balancer.ClientConnState) error {
|
|
if !cmp.Equal(bd.BuildOptions, bOpts) {
|
|
err := fmt.Errorf("buildOptions in child balancer: %v, want %v", bd, bOpts)
|
|
ccsCh.Send(err)
|
|
return err
|
|
}
|
|
ccsCh.Send(nil)
|
|
return nil
|
|
},
|
|
})
|
|
|
|
cc := testutils.NewTestClientConn(t)
|
|
rtb := rtBuilder.Build(cc, bOpts)
|
|
|
|
configJSON1 := fmt.Sprintf(`{
|
|
"children": {
|
|
"cds:cluster_1":{ "childPolicy": [{"%s":""}] }
|
|
}
|
|
}`, balancerName)
|
|
config1, err := rtParser.ParseConfig([]byte(configJSON1))
|
|
if err != nil {
|
|
t.Fatalf("failed to parse balancer config: %v", err)
|
|
}
|
|
|
|
if err := rtb.UpdateClientConnState(balancer.ClientConnState{BalancerConfig: config1}); err != nil {
|
|
t.Fatalf("failed to update ClientConn state: %v", err)
|
|
}
|
|
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
|
|
defer cancel()
|
|
if v, err := ccsCh.Receive(ctx); err != nil {
|
|
err2 := v.(error)
|
|
t.Fatal(err2)
|
|
}
|
|
}
|