istio.io/archive/v1.2/docs/tasks/telemetry/metrics/tcp-metrics/index.html

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<button id=search-close title="Cancel search" type=reset aria-label="Cancel search"><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#cancel-x"/></svg></button></form></nav></header><main class=primary><div id=sidebar-container class="sidebar-container sidebar-offcanvas"><nav id=sidebar aria-label="Section Navigation"><div class=directory><div class=card><button class="header dynamic" id=card24 title="Learn about the different parts of the Istio system and the abstractions it uses." aria-controls=card24-body><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#concepts"/></svg>Concepts</button><div class=body aria-labelledby=card24 role=region id=card24-body><ul role=tree aria-expanded=true class=leaf-section aria-labelledby=card24><li role=none><a role=treeitem title="Introduces Istio, the problems it solves, its high-level architecture and design goals." href=/v1.2/docs/concepts/what-is-istio/>What is Istio?</a></li><li role=none><a role=treeitem title="Describes the various Istio features focused on traffic routing and control." href=/v1.2/docs/concepts/traffic-management/>Traffic Management</a></li><li role=none><a role=treeitem title="Describes Istio's authorization and authentication functionality." href=/v1.2/docs/concepts/security/>Policies and Security</a></li><li role=none><a role=treeitem title="Describes the telemetry and monitoring features provided by Istio." href=/v1.2/docs/concepts/observability/>Observability</a></li><li role=none><a role=treeitem title="Introduces performance and scalability for Istio." href=/v1.2/docs/concepts/performance-and-scalability/>Performance and Scalability</a></li><li role=none><a role=treeitem title="Describes how a service mesh can be configured to include services from more than one cluster." href=/v1.2/docs/concepts/multicluster-deployments/>Multicluster Deployments</a></li></ul></div></div><div class=card><button class="header dynamic" id=card46 title="How to deploy and upgrade Istio in various environments such as Kubernetes and Consul." aria-controls=card46-body><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#setup"/></svg>Setup</button><div class=body aria-labelledby=card46 role=region id=card46-body><ul role=tree aria-expanded=true aria-labelledby=card46><li role=treeitem aria-label=Kubernetes><button aria-hidden=true></button><a title="Instructions for installing the Istio control plane on Kubernetes and adding virtual machines into the mesh." href=/v1.2/docs/setup/kubernetes/>Kubernetes</a><ul role=group aria-expanded=false><li role=none><a role=treeitem title="Download, install, and try out Istio." href=/v1.2/docs/setup/kubernetes/getting-started/>Getting Started</a></li><li role=treeitem aria-label="Platform Setup"><button aria-hidden=true></button><a title="How to prepare various Kubernetes platforms before installing Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/>Platform Setup</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Instructions to setup an Alibaba Cloud Kubernetes cluster for Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/alicloud/>Alibaba Cloud</a></li><li role=none><a role=treeitem title="Instructions to setup an Azure cluster for Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/azure/>Azure</a></li><li role=none><a role=treeitem title="Instructions to setup Docker Desktop for use with Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/docker/>Docker Desktop</a></li><li role=none><a role=treeitem title="Instructions to setup a Google Kubernetes Engine cluster for Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/gke/>Google Kubernetes Engine</a></li><li role=none><a role=treeitem title="Instructions to setup an IBM Cloud cluster for Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/ibm/>IBM Cloud</a></li><li role=none><a role=treeitem title="Instructions to setup a Gardener cluster for Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/gardener/>Kubernetes Gardener</a></li><li role=none><a role=treeitem title="Instructions to setup minikube for use with Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/minikube/>Minikube</a></li><li role=none><a role=treeitem title="Instructions to setup an OpenShift cluster for Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/openshift/>OpenShift</a></li><li role=none><a role=treeitem title="Instructions to setup an OKE cluster for Istio." href=/v1.2/docs/setup/kubernetes/platform-setup/oci/>Oracle Cloud Infrastructure</a></li></ul></li><li role=treeitem aria-label=Install><button aria-hidden=true></button><a title="Choose the guide that best suits your needs and platform." href=/v1.2/docs/setup/kubernetes/install/>Install</a><ul role=group aria-expanded=false><li role=none><a role=treeitem title="Instructions to install Istio in a Kubernetes cluster for evaluation." href=/v1.2/docs/setup/kubernetes/install/kubernetes/>Quick Start Evaluation Install</a></li><li role=none><a role=treeitem title="Install and configure Istio for in-depth evaluation or production use." href=/v1.2/docs/setup/kubernetes/install/helm/>Customizable Install with Helm</a></li><li role=treeitem aria-label="Multicluster Installation"><button aria-hidden=true></button><a title="Configure an Istio mesh spanning multiple Kubernetes clusters." href=/v1.2/docs/setup/kubernetes/install/multicluster/>Multicluster Installation</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Install an Istio mesh across multiple Kubernetes clusters with individually deployed control planes." href=/v1.2/docs/setup/kubernetes/install/multicluster/gateways/>Multiple control planes</a></li><li role=none><a role=treeitem title="Install an Istio mesh across multiple Kubernetes clusters with a shared control plane and VPN connectivity between clusters." href=/v1.2/docs/setup/kubernetes/install/multicluster/shared-vpn/>Shared control plane (single-network)</a></li><li role=none><a role=treeitem title="Install an Istio mesh across multiple Kubernetes clusters using a shared control plane for diconnected cluster networks." href=/v1.2/docs/setup/kubernetes/install/multicluster/shared-gateways/>Shared control plane (multi-network)</a></li></ul></li><li role=treeitem aria-label="Platform-specific Instructions"><button aria-hidden=true></button><a title="Additional installation instructions for supported Kubernetes platforms." href=/v1.2/docs/setup/kubernetes/install/platform/>Platform-specific Instructions</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Instructions to install Istio using the Alibaba Cloud Kubernetes Container Service." href=/v1.2/docs/setup/kubernetes/install/platform/alicloud/>Alibaba Cloud</a></li><li role=none><a role=treeitem title="Instructions to install Istio using the Google Kubernetes Engine (GKE)." href=/v1.2/docs/setup/kubernetes/install/platform/gke/>Google Kubernetes Engine</a></li><li role=none><a role=treeitem title="Instructions to install Istio using IBM Cloud Public or IBM Cloud Private." href=/v1.2/docs/setup/kubernetes/install/platform/ibm/>IBM Cloud</a></li></ul></li></ul></li><li role=treeitem aria-label=Upgrade><button aria-hidden=true></button><a title="Information on upgrading Istio." href=/v1.2/docs/setup/kubernetes/upgrade/>Upgrade</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Important changes operators must understand before upgrading to Istio 1.2." href=/v1.2/docs/setup/kubernetes/upgrade/notice/>1.2 Upgrade Notice</a></li><li role=none><a role=treeitem title="Upgrade the Istio control plane and data plane independently." href=/v1.2/docs/setup/kubernetes/upgrade/steps/>Upgrade Steps</a></li></ul></li><li role=treeitem aria-label="More Guides"><button aria-hidden=true></button><a title="More information on additional setup tasks." href=/v1.2/docs/setup/kubernetes/additional-setup/>More Guides</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Prepare your Kubernetes pods and services to run in an Istio-enabled cluster." href=/v1.2/docs/setup/kubernetes/additional-setup/requirements/>Pods and Services</a></li><li role=none><a role=treeitem title="Describes the built-in Istio installation configuration profiles." href=/v1.2/docs/setup/kubernetes/additional-setup/config-profiles/>Installation Configuration Profiles</a></li><li role=none><a role=treeitem title="Install the Istio sidecar in application pods automatically using the sidecar injector webhook or manually using istioctl CLI." href=/v1.2/docs/setup/kubernetes/additional-setup/sidecar-injection/>Installing the Sidecar</a></li><li role=none><a role=treeitem title="Install and use Istio with the Istio CNI plugin, allowing operators to deploy services with lower privilege." href=/v1.2/docs/setup/kubernetes/additional-setup/cni/>Install Istio with the Istio CNI plugin</a></li><li role=none><a role=treeitem title="Integrate VMs and bare metal hosts into an Istio mesh deployed on Kubernetes." href=/v1.2/docs/setup/kubernetes/additional-setup/mesh-expansion/>Mesh Expansion</a></li></ul></li></ul></li><li role=treeitem aria-label="Nomad &amp; Consul"><button aria-hidden=true></button><a title="Instructions for installing the Istio control plane in a Consul based environment, with or without Nomad." href=/v1.2/docs/setup/consul/>Nomad &amp; Consul</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Quick Start instructions to setup the Istio service mesh with Docker Compose." href=/v1.2/docs/setup/consul/quick-start/>Quick Start on Docker</a></li><li role=none><a role=treeitem title="Instructions for installing the Istio control plane in a Consul-based environment, with or without Nomad." href=/v1.2/docs/setup/consul/install/>Installation</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card69 title="How to do single specific targeted activities with the Istio system." aria-controls=card69-body><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#tasks"/></svg>Tasks</button><div class="body default" aria-labelledby=card69 role=region id=card69-body><ul role=tree aria-expanded=true aria-labelledby=card69><li role=treeitem aria-label="Traffic Management"><button aria-hidden=true></button><a title="Tasks that demonstrate Istio's traffic routing features." href=/v1.2/docs/tasks/traffic-management/>Traffic Management</a><ul role=group aria-expanded=false><li role=none><a role=treeitem title="This task shows you how to configure dynamic request routing to multiple versions of a microservice." href=/v1.2/docs/tasks/traffic-management/request-routing/>Request Routing</a></li><li role=none><a role=treeitem title="This task shows you how to inject faults to test the resiliency of your application." href=/v1.2/docs/tasks/traffic-management/fault-injection/>Fault Injection</a></li><li role=none><a role=treeitem title="Shows you how to migrate traffic from an old to new version of a service." href=/v1.2/docs/tasks/traffic-management/traffic-shifting/>Traffic Shifting</a></li><li role=none><a role=treeitem title="Shows you how to migrate TCP traffic from an old to new version of a TCP service." href=/v1.2/docs/tasks/traffic-management/tcp-traffic-shifting/>TCP Traffic Shifting</a></li><li role=none><a role=treeitem title="This task shows you how to setup request timeouts in Envoy using Istio." href=/v1.2/docs/tasks/traffic-management/request-timeouts/>Request Timeouts</a></li><li role=none><a role=treeitem title="This task shows you how to configure circuit breaking for connections, requests, and outlier detection." href=/v1.2/docs/tasks/traffic-management/circuit-breaking/>Circuit Breaking</a></li><li role=none><a role=treeitem title="This task demonstrates the traffic mirroring/shadowing capabilities of Istio." href=/v1.2/docs/tasks/traffic-management/mirroring/>Mirroring</a></li><li role=treeitem aria-label=Ingress><button aria-hidden=true></button><a title="Controlling ingress traffic for an Istio service mesh." href=/v1.2/docs/tasks/traffic-management/ingress/>Ingress</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Describes how to configure an Istio gateway to expose a service outside of the service mesh." href=/v1.2/docs/tasks/traffic-management/ingress/ingress-control/>Ingress Gateways</a></li><li role=none><a role=treeitem title="Expose a service outside of the service mesh over TLS or mTLS using file-mounted certificates." href=/v1.2/docs/tasks/traffic-management/ingress/secure-ingress-mount/>Secure Gateways (File Mount)</a></li><li role=none><a role=treeitem title="Expose a service outside of the service mesh over TLS or mTLS using the secret discovery service (SDS)." href=/v1.2/docs/tasks/traffic-management/ingress/secure-ingress-sds/>Secure Gateways (SDS)</a></li><li role=none><a role=treeitem title="Describes how to configure SNI passthrough for an ingress gateway." href=/v1.2/docs/tasks/traffic-management/ingress/ingress-sni-passthrough/>Ingress Gateway without TLS Termination</a></li><li role=none><a role=treeitem title="Demonstrates how to obtain Let's Encrypt TLS certificates for Kubernetes Ingress automatically using Cert-Manager." href=/v1.2/docs/tasks/traffic-management/ingress/ingress-certmgr/>Kubernetes Ingress with Cert-Manager</a></li></ul></li><li role=treeitem aria-label=Egress><button aria-hidden=true></button><a title="Controlling egress traffic for an Istio service mesh." href=/v1.2/docs/tasks/traffic-management/egress/>Egress</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Describes how to configure Istio to route traffic from services in the mesh to external services." href=/v1.2/docs/tasks/traffic-management/egress/egress-control/>Accessing External Services</a></li><li role=none><a role=treeitem title="Describes how to configure Istio to perform TLS origination for traffic to external services." href=/v1.2/docs/tasks/traffic-management/egress/egress-tls-origination/>Egress TLS Origination</a></li><li role=none><a role=treeitem title="Describes how to configure Istio to direct traffic to external services through a dedicated gateway." href=/v1.2/docs/tasks/traffic-management/egress/egress-gateway/>Egress Gateways</a></li><li role=none><a role=treeitem title="Describes how to configure an Egress Gateway to perform TLS origination to external services." href=/v1.2/docs/tasks/traffic-management/egress/egress-gateway-tls-origination/>Egress Gateways with TLS Origination</a></li><li role=none><a role=treeitem title="Describes how to enable egress traffic for a set of hosts in a common domain, instead of configuring each and every host separately." href=/v1.2/docs/tasks/traffic-management/egress/wildcard-egress-hosts/>Egress using Wildcard Hosts</a></li><li role=none><a role=treeitem title="Describes how to configure SNI monitoring and apply policies on TLS egress traffic." href=/v1.2/docs/tasks/traffic-management/egress/egress_sni_monitoring_and_policies/>Monitoring and Policies for TLS Egress</a></li><li role=none><a role=treeitem title="Describes how to configure Istio to let applications use an external HTTPS proxy." href=/v1.2/docs/tasks/traffic-management/egress/http-proxy/>Using an External HTTPS Proxy</a></li></ul></li></ul></li><li role=treeitem aria-label=Security><button aria-hidden=true></button><a title="Demonstrates how to secure the mesh." href=/v1.2/docs/tasks/security/>Security</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Shows you how to use Istio authentication policy to setup mutual TLS and basic end-user authentication." href=/v1.2/docs/tasks/security/authn-policy/>Authentication Policy</a></li><li role=none><a role=treeitem title="Shows how to set up role-based access control for HTTP services." href=/v1.2/docs/tasks/security/authz-http/>Authorization for HTTP Services</a></li><li role=none><a role=treeitem title="Shows how to set up role-based access control for TCP services." href=/v1.2/docs/tasks/security/authz-tcp/>Authorization for TCP Services</a></li><li role=none><a role=treeitem title="Tutorial on how to configure the groups-base authorization and configure the authorization of list-typed claims in Istio." href=/v1.2/docs/tasks/security/rbac-groups/>Authorization for groups and list claims</a></li><li role=none><a role=treeitem title="Shows how to use Authorization permissive mode." href=/v1.2/docs/tasks/security/authz-permissive/>Authorization permissive mode</a></li><li role=none><a role=treeitem title="This task shows you how to integrate a Vault Certificate Authority with Istio for mutual TLS." href=/v1.2/docs/tasks/security/vault-ca/>Istio Vault CA Integration</a></li><li role=none><a role=treeitem title="Shows you how to verify and test Istio's automatic mutual TLS authentication." href=/v1.2/docs/tasks/security/mutual-tls/>Mutual TLS Deep-Dive</a></li><li role=none><a role=treeitem title="Shows how operators can configure Citadel with existing root certificate, signing certificate and key." href=/v1.2/docs/tasks/security/plugin-ca-cert/>Plugging in External CA Key and Certificate</a></li><li role=none><a role=treeitem title="Shows how to enable Citadel health checking with Kubernetes." href=/v1.2/docs/tasks/security/health-check/>Citadel Health Checking</a></li><li role=none><a role=treeitem title="Shows how to enable SDS (secret discovery service) for Istio identity provisioning." href=/v1.2/docs/tasks/security/auth-sds/>Provisioning Identity through SDS</a></li><li role=none><a role=treeitem title="Shows you how to incrementally migrate your Istio services to mutual TLS." href=/v1.2/docs/tasks/security/mtls-migration/>Mutual TLS Migration</a></li><li role=none><a role=treeitem title="Shows how to enable mutual TLS on HTTPS services." href=/v1.2/docs/tasks/security/https-overlay/>Mutual TLS over HTTPS</a></li></ul></li><li role=treeitem aria-label=Policies><button aria-hidden=true></button><a title="Demonstrates policy enforcement features." href=/v1.2/docs/tasks/policy-enforcement/>Policies</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="This task shows you how to enable Istio policy enforcement." href=/v1.2/docs/tasks/policy-enforcement/enabling-policy/>Enabling Policy Enforcement</a></li><li role=none><a role=treeitem title="This task shows you how to use Istio to dynamically limit the traffic to a service." href=/v1.2/docs/tasks/policy-enforcement/rate-limiting/>Enabling Rate Limits</a></li><li role=none><a role=treeitem title="Shows how to modify request headers and routing using policy adapters." href=/v1.2/docs/tasks/policy-enforcement/control-headers/>Control Headers and Routing</a></li><li role=none><a role=treeitem title="Shows how to control access to a service using simple denials or white/black listing." href=/v1.2/docs/tasks/policy-enforcement/denial-and-list/>Denials and White/Black Listing</a></li></ul></li><li role=treeitem aria-label=Telemetry><button class=show aria-hidden=true></button><a title="Demonstrates how to collect telemetry information from the mesh." href=/v1.2/docs/tasks/telemetry/>Telemetry</a><ul role=group aria-expanded=true><li role=treeitem aria-label=Metrics><button class=show aria-hidden=true></button><a title="Demonstrates the configuration, collection, and processing of Istio mesh metrics." href=/v1.2/docs/tasks/telemetry/metrics/>Metrics</a><ul role=group aria-expanded=true class=leaf-section><li role=none><a role=treeitem title="This task shows you how to configure Istio to collect and customize metrics." href=/v1.2/docs/tasks/telemetry/metrics/collecting-metrics/>Collecting Metrics</a></li><li role=none><span role=treeitem class=current title="This task shows you how to configure Istio to collect metrics for TCP services.">Collecting Metrics for TCP services</span></li><li role=none><a role=treeitem title="This task shows you how to query for Istio Metrics using Prometheus." href=/v1.2/docs/tasks/telemetry/metrics/querying-metrics/>Querying Metrics from Prometheus</a></li><li role=none><a role=treeitem title="This task shows you how to setup and use the Istio Dashboard to monitor mesh traffic." href=/v1.2/docs/tasks/telemetry/metrics/using-istio-dashboard/>Visualizing Metrics with Grafana</a></li></ul></li><li role=treeitem aria-label=Logs><button aria-hidden=true></button><a title="Demonstrates the configuration, collection, and processing of Istio mesh logs." href=/v1.2/docs/tasks/telemetry/logs/>Logs</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="This task shows you how to configure Istio to collect and customize logs." href=/v1.2/docs/tasks/telemetry/logs/collecting-logs/>Collecting Logs</a></li><li role=none><a role=treeitem title="This task shows you how to configure Envoy proxies to print access log to their standard output." href=/v1.2/docs/tasks/telemetry/logs/access-log/>Getting Envoy&#39;s Access Logs</a></li><li role=none><a role=treeitem title="This task shows you how to configure Istio to log to a Fluentd daemon." href=/v1.2/docs/tasks/telemetry/logs/fluentd/>Logging with Fluentd</a></li></ul></li><li role=treeitem aria-label="Distributed Tracing"><button aria-hidden=true></button><a title="This task shows you how to configure Istio-enabled applications to collect trace spans." href=/v1.2/docs/tasks/telemetry/distributed-tracing/>Distributed Tracing</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Overview of distributed tracing in Istio." href=/v1.2/docs/tasks/telemetry/distributed-tracing/overview/>Overview</a></li><li role=none><a role=treeitem title="Learn how to configure the proxies to send tracing requests to Jaeger." href=/v1.2/docs/tasks/telemetry/distributed-tracing/jaeger/>Jaeger</a></li><li role=none><a role=treeitem title="Learn how to configure the proxies to send tracing requests to Zipkin." href=/v1.2/docs/tasks/telemetry/distributed-tracing/zipkin/>Zipkin</a></li><li role=none><a role=treeitem title="How to configure the proxies to send tracing requests to LightStep." href=/v1.2/docs/tasks/telemetry/distributed-tracing/lightstep/>LightStep</a></li></ul></li><li role=none><a role=treeitem title="This task shows you how to visualize your services within an Istio mesh." href=/v1.2/docs/tasks/telemetry/kiali/>Visualizing Your Mesh</a></li><li role=none><a role=treeitem title="This task shows you how to configure external access to the set of Istio telemetry addons." href=/v1.2/docs/tasks/telemetry/gateways/>Remotely Accessing Telemetry Addons</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card83 title="A variety of fully working example uses for Istio that you can experiment with." aria-controls=card83-body><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#examples"/></svg>Examples</button><div class=body aria-labelledby=card83 role=region id=card83-body><ul role=tree aria-expanded=true aria-labelledby=card83><li role=none><a role=treeitem title="Deploys a sample application composed of four separate microservices used to demonstrate various Istio features." href=/v1.2/docs/examples/bookinfo/>Bookinfo Application</a></li><li role=none><a role=treeitem title="Explains how to manually integrate Google Cloud Endpoints services with Istio." href=/v1.2/docs/examples/endpoints/>Install Istio for Google Cloud Endpoints Services</a></li><li role=none><a role=treeitem title="Illustrates how to use Istio to control a Kubernetes cluster and raw VMs as a single mesh." href=/v1.2/docs/examples/integrating-vms/>Integrating Virtual Machines</a></li><li role=treeitem aria-label="Multicluster Service Mesh"><button aria-hidden=true></button><a title="Multicluster service mesh examples for Istio that you can experiment with." href=/v1.2/docs/examples/multicluster/>Multicluster Service Mesh</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Set up a multicluster mesh over two GKE clusters." href=/v1.2/docs/examples/multicluster/gke/>Google Kubernetes Engine</a></li><li role=none><a role=treeitem title="Example multicluster mesh over two IBM Cloud Private clusters." href=/v1.2/docs/examples/multicluster/icp/>IBM Cloud Private</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card100 title="Hints, tips, tricks about running an Istio mesh." aria-controls=card100-body><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#guide"/></svg>Operations</button><div class=body aria-labelledby=card100 role=region id=card100-body><ul role=tree aria-expanded=true aria-labelledby=card100><li role=none><a role=treeitem title="Describes how to use component-level logging to get insights into a running component's behavior." href=/v1.2/docs/ops/component-logging/>Component Logging</a></li><li role=none><a role=treeitem title="Describes how to use ControlZ to get insight into individual running components." href=/v1.2/docs/ops/controlz/>Component Introspection</a></li><li role=none><a role=treeitem title="How to do low-level debugging of Istio components." href=/v1.2/docs/ops/component-debugging/>Component Debugging</a></li><li role=treeitem aria-label="Traffic Management"><button aria-hidden=true></button><a title="Helps you manage the networking aspects of a running mesh." href=/v1.2/docs/ops/traffic-management/>Traffic Management</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="An introduction to Istio networking operational aspects." href=/v1.2/docs/ops/traffic-management/introduction/>Introduction to Network Operations</a></li><li role=none><a role=treeitem title="Provides specific deployment and configuration guidelines." href=/v1.2/docs/ops/traffic-management/deploy-guidelines/>Deployment and Configuration Guidelines</a></li><li role=none><a role=treeitem title="Describes common networking issues and how to recognize and avoid them." href=/v1.2/docs/ops/traffic-management/troubleshooting/>Troubleshooting Networking Issues</a></li><li role=none><a role=treeitem title="Describes tools and techniques to diagnose Envoy configuration issues related to traffic management." href=/v1.2/docs/ops/traffic-management/proxy-cmd/>Debugging Envoy and Pilot</a></li><li role=none><a role=treeitem title="Information on how to enable and understand Locality Load Balancing." href=/v1.2/docs/ops/traffic-management/locality-load-balancing/>Locality Load Balancing</a></li></ul></li><li role=treeitem aria-label=Security><button aria-hidden=true></button><a title="Helps you manage the security aspects of a running mesh." href=/v1.2/docs/ops/security/>Security</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Demonstrates how to debug authorization." href=/v1.2/docs/ops/security/debugging-authorization/>Debugging Authorization</a></li><li role=none><a role=treeitem title="What to do if Citadel is not behaving properly." href=/v1.2/docs/ops/security/repairing-citadel/>Repairing Citadel</a></li><li role=none><a role=treeitem title="What to do if you suspect problems with Istio keys and certificates." href=/v1.2/docs/ops/security/keys-and-certs/>Keys and Certificates</a></li><li role=none><a role=treeitem title="What to do if mutual TLS authentication isn't working." href=/v1.2/docs/ops/security/mutual-tls/>Mutual TLS</a></li><li role=none><a role=treeitem title="Authorization is enabled, but requests make it through anyway." href=/v1.2/docs/ops/security/authorization-permissive/>Authorization Too Permissive</a></li><li role=none><a role=treeitem title="Authorization is enabled and no requests make it through to the service." href=/v1.2/docs/ops/security/authorization-restrictive/>Authorization Too Restrictive</a></li><li role=none><a role=treeitem title="What to do if end-user authentication doesn't work." href=/v1.2/docs/ops/security/end-user-auth/>End User Authentication</a></li><li role=none><a role=treeitem title="Learn how to extend the lifetime of the Istio self-signed root certificate." href=/v1.2/docs/ops/security/root-transition/>Extending Self-Signed Certificate Lifetime</a></li></ul></li><li role=treeitem aria-label=Telemetry><button aria-hidden=true></button><a title="Helps you manage telemetry collection and visualization in a running mesh." href=/v1.2/docs/ops/telemetry/>Telemetry</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Diagnose problems where metrics are not being collected." href=/v1.2/docs/ops/telemetry/missing-metrics/>Missing Metrics</a></li><li role=none><a role=treeitem title="Dealing with Grafana issues." href=/v1.2/docs/ops/telemetry/grafana/>Grafana</a></li><li role=none><a role=treeitem title="Fine-grained control of Envoy statistics." href=/v1.2/docs/ops/telemetry/envoy-stats/>Envoy Statistics</a></li></ul></li><li role=treeitem aria-label="Installation and Setup"><button aria-hidden=true></button><a title="Helps you diagnose and repair Istio installations." href=/v1.2/docs/ops/setup/>Installation and Setup</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Provides a general overview of Istio's use of Kubernetes webhooks and the related issues that can arise." href=/v1.2/docs/ops/setup/webhook/>Dynamic Admission Webhooks Overview</a></li><li role=none><a role=treeitem title="Describes Istio's use of Kubernetes webhooks for server-side configuration validation." href=/v1.2/docs/ops/setup/validation/>Configuration Validation Webhook</a></li><li role=none><a role=treeitem title="Istio includes a supplemental tool that provides debugging and diagnosis for Istio service mesh deployments." href=/v1.2/docs/ops/setup/istioctl/>Using the istioctl command-line tool</a></li><li role=none><a role=treeitem title="Describes Istio's use of Kubernetes webhooks for automatic sidecar injection." href=/v1.2/docs/ops/setup/injection/>Sidecar Injection Webhook</a></li><li role=none><a role=treeitem title="Describes how to check which capabilities are allowed for your pods." href=/v1.2/docs/ops/setup/required-pod-capabilities/>Required Pod Capabilities</a></li><li role=none><a role=treeitem title="Shows how to do health checking for Istio services." href=/v1.2/docs/ops/setup/app-health-check/>Health Checking of Istio Services</a></li></ul></li><li role=none><a role=treeitem title="Advice on tackling common problems with Istio." href=/v1.2/docs/ops/misc/>Miscellaneous</a></li></ul></div></div><div class=card><button class="header dynamic" id=card130 title="Detailed authoritative reference material such as command-line options, configuration options, and API calling parameters." aria-controls=card130-body><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#reference"/></svg>Reference</button><div class=body aria-labelledby=card130 role=region id=card130-body><ul role=tree aria-expanded=true aria-labelledby=card130><li role=treeitem aria-label=Configuration><button aria-hidden=true></button><a title="Detailed information on configuration options." href=/v1.2/docs/reference/config/>Configuration</a><ul role=group aria-expanded=false><li role=treeitem aria-label="Traffic Management"><button aria-hidden=true></button><a title="Describes how to configure HTTP/TCP routing features." href=/v1.2/docs/reference/config/networking/>Traffic Management</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Configuration affecting load balancing, outlier detection, etc." href=/v1.2/docs/reference/config/networking/v1alpha3/destination-rule/>Destination Rule</a></li><li role=none><a role=treeitem title="Configuration affecting insertion of custom Envoy filters." href=/v1.2/docs/reference/config/networking/v1alpha3/envoy-filter/>Envoy Filter</a></li><li role=none><a role=treeitem title="Configuration affecting edge load balancer." href=/v1.2/docs/reference/config/networking/v1alpha3/gateway/>Gateway</a></li><li role=none><a role=treeitem title="Configuration affecting service registry." href=/v1.2/docs/reference/config/networking/v1alpha3/service-entry/>Service Entry</a></li><li role=none><a role=treeitem title="Configuration affecting network reachability of a sidecar." href=/v1.2/docs/reference/config/networking/v1alpha3/sidecar/>Sidecar</a></li><li role=none><a role=treeitem title="Configuration affecting label/content routing, sni routing, etc." href=/v1.2/docs/reference/config/networking/v1alpha3/virtual-service/>Virtual Service</a></li></ul></li><li role=treeitem aria-label=Authorization><button aria-hidden=true></button><a title="Describes how to configure Istio's authorization features." href=/v1.2/docs/reference/config/authorization/>Authorization</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Describes the supported constraints and properties." href=/v1.2/docs/reference/config/authorization/constraints-and-properties/>Constraints and Properties</a></li><li role=none><a role=treeitem title="Configuration for Role Based Access Control." href=/v1.2/docs/reference/config/authorization/istio.rbac.v1alpha1/>RBAC</a></li></ul></li><li role=none><a role=treeitem title="Describes the options available when installing Istio using the included Helm chart." href=/v1.2/docs/reference/config/installation-options/>Installation Options</a></li><li role=none><a role=treeitem title="Details the Helm chart installation options differences between release-1.1 and release-1.2." href=/v1.2/docs/reference/config/installation-options-changes/>Installation Options Changes</a></li><li role=treeitem aria-label="Policies and Telemetry"><button aria-hidden=true></button><a title="Describes how to configure Istio's policy and telemetry features." href=/v1.2/docs/reference/config/policy-and-telemetry/>Policies and Telemetry</a><ul role=group aria-expanded=false><li role=none><a role=treeitem title="Describes the configuration model for Istio's policy enforcement and telemetry mechanisms." href=/v1.2/docs/reference/config/policy-and-telemetry/mixer-overview/>Mixer Configuration Model</a></li><li role=none><a role=treeitem title="Describes the base attribute vocabulary used for policy and control." href=/v1.2/docs/reference/config/policy-and-telemetry/attribute-vocabulary/>Attribute Vocabulary</a></li><li role=none><a role=treeitem title="Mixer configuration expression language reference." href=/v1.2/docs/reference/config/policy-and-telemetry/expression-language/>Expression Language</a></li><li role=treeitem aria-label=Adapters><button aria-hidden=true></button><a title="Mixer adapters allow Istio to interface to a variety of infrastructure backends for such things as metrics and logs." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/>Adapters</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Adapter to deliver metrics to Apache SkyWalking." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/apache-skywalking/>Apache SkyWalking</a></li><li role=none><a role=treeitem title="Adapter for Apigee's distributed policy checks and analytics." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/apigee/>Apigee</a></li><li role=none><a role=treeitem title="Adapter for circonus.com's monitoring solution." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/circonus/>Circonus</a></li><li role=none><a role=treeitem title="Adapter for cloudmonitor metrics." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/cloudmonitor/>CloudMonitor</a></li><li role=none><a role=treeitem title="Adapter for cloudwatch metrics." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/cloudwatch/>CloudWatch</a></li><li role=none><a role=treeitem title="Adapter to deliver metrics to a dogstatsd agent for delivery to DataDog." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/datadog/>Datadog</a></li><li role=none><a role=treeitem title="Adapter that always returns a precondition denial." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/denier/>Denier</a></li><li role=none><a role=treeitem title="Adapter that delivers logs to a Fluentd daemon." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/fluentd/>Fluentd</a></li><li role=none><a role=treeitem title="Adapter that extracts information from a Kubernetes environment." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/kubernetesenv/>Kubernetes Env</a></li><li role=none><a role=treeitem title="Adapter that performs whitelist or blacklist checks." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/list/>List</a></li><li role=none><a role=treeitem title="Adapter for a simple in-memory quota management system." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/memquota/>Memory quota</a></li><li role=none><a role=treeitem title="Adapter that implements an Open Policy Agent engine." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/opa/>OPA</a></li><li role=none><a role=treeitem title="Adapter that exposes Istio metrics for ingestion by a Prometheus harvester." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/prometheus/>Prometheus</a></li><li role=none><a role=treeitem title="Adapter for a Redis-based quota management system." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/redisquota/>Redis Quota</a></li><li role=none><a role=treeitem title="Adapter that sends metrics to SignalFx." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/signalfx/>SignalFx</a></li><li role=none><a role=treeitem title="Adapter to deliver logs and metrics to Papertrail and AppOptics backends." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/solarwinds/>SolarWinds</a></li><li role=none><a role=treeitem title="Adapter to deliver logs, metrics, and traces to Stackdriver." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/stackdriver/>Stackdriver</a></li><li role=none><a role=treeitem title="Adapter to deliver metrics to a StatsD backend." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/statsd/>StatsD</a></li><li role=none><a role=treeitem title="Adapter to locally output logs and metrics." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/stdio/>Stdio</a></li><li role=none><a role=treeitem title="Adapter to deliver metrics to Wavefront by VMware." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/wavefront/>Wavefront by VMware</a></li><li role=none><a role=treeitem title="Adapter to deliver tracing data to Zipkin." href=/v1.2/docs/reference/config/policy-and-telemetry/adapters/zipkin/>Zipkin</a></li></ul></li><li role=none><a role=treeitem title="Default Metrics exported from Istio through Mixer." href=/v1.2/docs/reference/config/policy-and-telemetry/metrics/>Default Metrics</a></li><li role=treeitem aria-label=Templates><button aria-hidden=true></button><a title="Mixer templates are used to send data to individual adapters." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/>Templates</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="A template that represents a single API key." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/apikey/>API Key</a></li><li role=none><a role=treeitem title="The Analytics template is used to dispatch runtime telemetry to Apigee." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/analytics/>Analytics</a></li><li role=none><a role=treeitem title="A template used to represent an access control query." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/authorization/>Authorization</a></li><li role=none><a role=treeitem title="A template that carries no data, useful for testing." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/checknothing/>Check Nothing</a></li><li role=none><a role=treeitem title="A template designed to report observed communication edges between workloads." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/edge/>Edge</a></li><li role=none><a role=treeitem title="A template that is used to control the production of Kubernetes-specific attributes." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/kubernetes/>Kubernetes</a></li><li role=none><a role=treeitem title="A template designed to let you perform list checking operations." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/listentry/>List Entry</a></li><li role=none><a role=treeitem title="A template that represents a single runtime log entry." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/logentry/>Log Entry</a></li><li role=none><a role=treeitem title="A template that represents a single runtime metric." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/metric/>Metric</a></li><li role=none><a role=treeitem title="A template that represents a quota allocation request." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/quota/>Quota</a></li><li role=none><a role=treeitem title="A template that carries no data, useful for testing." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/reportnothing/>Report Nothing</a></li><li role=none><a role=treeitem title="A template that represents an individual span within a distributed trace." href=/v1.2/docs/reference/config/policy-and-telemetry/templates/tracespan/>Trace Span</a></li></ul></li><li role=none><a role=treeitem title="Configuration state for the Mixer client library." href=/v1.2/docs/reference/config/policy-and-telemetry/istio.mixer.v1.config.client/>Mixer Client</a></li><li role=none><a role=treeitem title="Describes the rules used to configure Mixer's policy and telemetry features." href=/v1.2/docs/reference/config/policy-and-telemetry/istio.policy.v1beta1/>Rules</a></li></ul></li><li role=none><a role=treeitem title="Authentication policy for Istio services." href=/v1.2/docs/reference/config/istio.authentication.v1alpha1/>Authentication Policy</a></li><li role=none><a role=treeitem title="Configuration affecting the service mesh as a whole." href=/v1.2/docs/reference/config/istio.mesh.v1alpha1/>Service Mesh</a></li></ul></li><li role=treeitem aria-label=Commands><button aria-hidden=true></button><a title="Describes usage and options of the Istio commands and utilities." href=/v1.2/docs/reference/commands/>Commands</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Galley provides configuration management services for Istio." href=/v1.2/docs/reference/commands/galley/>galley</a></li><li role=none><a role=treeitem title="Istio Certificate Authority (CA)." href=/v1.2/docs/reference/commands/istio_ca/>istio_ca</a></li><li role=none><a role=treeitem title="Istio control interface." href=/v1.2/docs/reference/commands/istioctl/>istioctl</a></li><li role=none><a role=treeitem title="Mixer is Istio's abstraction on top of infrastructure backends." href=/v1.2/docs/reference/commands/mixs/>mixs</a></li><li role=none><a role=treeitem title="Istio security per-node agent." href=/v1.2/docs/reference/commands/node_agent/>node_agent</a></li><li role=none><a role=treeitem title="The Istio operator." href=/v1.2/docs/reference/commands/operator/>operator</a></li><li role=none><a role=treeitem title="Istio Pilot agent." href=/v1.2/docs/reference/commands/pilot-agent/>pilot-agent</a></li><li role=none><a role=treeitem title="Istio Pilot." href=/v1.2/docs/reference/commands/pilot-discovery/>pilot-discovery</a></li><li role=none><a role=treeitem title="Kubernetes webhook for automatic Istio sidecar injection." href=/v1.2/docs/reference/commands/sidecar-injector/>sidecar-injector</a></li></ul></li><li role=none><a role=treeitem title="A glossary of common Istio terms." href=/v1.2/docs/reference/glossary/>Glossary</a></li></ul></div></div></div></nav></div><div class=article-container><button tabindex=-1 id=sidebar-toggler title="Toggle the navigation bar"><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#pull"/></svg></button><nav aria-label=Breadcrumb><ol><li><a href=/v1.2/ title="Connect, secure, control, and observe services.">Istio</a></li><li><a href=/v1.2/docs/ title="Learn how to deploy, use, and operate Istio.">Docs</a></li><li><a href=/v1.2/docs/tasks/ title="How to do single specific targeted activities with the Istio system.">Tasks</a></li><li><a href=/v1.2/docs/tasks/telemetry/ title="Demonstrates how to collect telemetry information from the mesh.">Telemetry</a></li><li><a href=/v1.2/docs/tasks/telemetry/metrics/ title="Demonstrates the configuration, collection, and processing of Istio mesh metrics.">Metrics</a></li><li>Collecting Metrics for TCP services</li></ol></nav><article aria-labelledby=title><div class=title-area><div><h1 id=title>Collecting Metrics for TCP services</h1><p class=byline><span title="686 words"><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#clock"/></svg><span>&nbsp;</span>4 minute read</span></p></div></div><nav class=toc-inlined aria-label="Table of Contents"><div><hr><ol><li role=none aria-label="Before you begin"><a href=#before-you-begin>Before you begin</a><li role=none aria-label="Collecting new telemetry data"><a href=#collecting-new-telemetry-data>Collecting new telemetry data</a><li role=none aria-label="Understanding TCP telemetry collection"><a href=#understanding-tcp-telemetry-collection>Understanding TCP telemetry collection</a><ol><li role=none aria-label="TCP attributes"><a href=#tcp-attributes>TCP attributes</a></ol></li><li role=none aria-label=Cleanup><a href=#cleanup>Cleanup</a><li role=none aria-label="See also"><a href=#see-also>See also</a></li></ol><hr></div></nav><p>This task shows how to configure Istio to automatically gather telemetry for TCP
services in a mesh. At the end of this task, a new metric will be enabled for
calls to a TCP service within your mesh.</p><p>The <a href=/v1.2/docs/examples/bookinfo/>Bookinfo</a> sample application is used
as the example application throughout this task.</p><h2 id=before-you-begin>Before you begin</h2><ul><li><p><a href=/v1.2/docs/setup/kubernetes>Install Istio</a> in your cluster and deploy an
application.</p></li><li><p>This task assumes that the Bookinfo sample will be deployed in the <code>default</code>
namespace. If you use a different namespace, you will need to update the
example configuration and commands.</p></li></ul><h2 id=collecting-new-telemetry-data>Collecting new telemetry data</h2><ol><li><p>Apply a YAML file with configuration for the new metrics that Istio
will generate and collect automatically.</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/telemetry/tcp-metrics.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f @samples/bookinfo/telemetry/tcp-metrics.yaml@
</code></pre></div><div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.2/img/icons.svg#callout-warning"/></svg></div><div class=content><p>If you use Istio 1.1.2 or prior, please use the following configuration instead:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/telemetry/tcp-metrics-crd.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f @samples/bookinfo/telemetry/tcp-metrics-crd.yaml@
</code></pre></div></div></aside></div></li><li><p>Setup Bookinfo to use MongoDB.</p><ol><li><p>Install <code>v2</code> of the <code>ratings</code> service.</p><p>If you are using a cluster with automatic sidecar injection enabled,
simply deploy the services using <code>kubectl</code>:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/platform/kube/bookinfo-ratings-v2.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f @samples/bookinfo/platform/kube/bookinfo-ratings-v2.yaml@
</code></pre></div><p>If you are using manual sidecar injection, use the following command instead:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/platform/kube/bookinfo-ratings-v2.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f &lt;(istioctl kube-inject -f @samples/bookinfo/platform/kube/bookinfo-ratings-v2.yaml@)
deployment &#34;ratings-v2&#34; configured
</code></pre></div></li><li><p>Install the <code>mongodb</code> service:</p><p>If you are using a cluster with automatic sidecar injection enabled,
simply deploy the services using <code>kubectl</code>:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/platform/kube/bookinfo-db.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f @samples/bookinfo/platform/kube/bookinfo-db.yaml@
</code></pre></div><p>If you are using manual sidecar injection, use the following command instead:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/platform/kube/bookinfo-db.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f &lt;(istioctl kube-inject -f @samples/bookinfo/platform/kube/bookinfo-db.yaml@)
service &#34;mongodb&#34; configured
deployment &#34;mongodb-v1&#34; configured
</code></pre></div></li><li><p>The Bookinfo sample deploys multiple versions of each microservice, so you will start by creating destination rules
that define the service subsets corresponding to each version, and the load balancing policy for each subset.</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/networking/destination-rule-all.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f @samples/bookinfo/networking/destination-rule-all.yaml@
</code></pre></div><p>If you enabled mutual TLS, please run the following instead</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/networking/destination-rule-all-mtls.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f @samples/bookinfo/networking/destination-rule-all-mtls.yaml@
</code></pre></div><p>You can display the destination rules with the following command:</p><pre><code class=language-bash data-expandlinks=true>$ kubectl get destinationrules -o yaml
</code></pre><p>Since the subset references in virtual services rely on the destination rules,
wait a few seconds for destination rules to propagate before adding virtual services that refer to these subsets.</p></li><li><p>Create <code>ratings</code> and <code>reviews</code> virtual services:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/networking/virtual-service-ratings-db.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl apply -f @samples/bookinfo/networking/virtual-service-ratings-db.yaml@
Created config virtual-service/default/reviews at revision 3003
Created config virtual-service/default/ratings at revision 3004
</code></pre></div></li></ol></li><li><p>Send traffic to the sample application.</p><p>For the Bookinfo sample, visit <code>http://$GATEWAY_URL/productpage</code> in your web
browser or issue the following command:</p><pre><code class=language-bash data-expandlinks=true>$ curl http://$GATEWAY_URL/productpage
</code></pre></li><li><p>Verify that the new metric values are being generated and collected.</p><p>In a Kubernetes environment, setup port-forwarding for Prometheus by
executing the following command:</p><pre><code class=language-bash data-expandlinks=true>$ kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=prometheus -o jsonpath=&#39;{.items[0].metadata.name}&#39;) 9090:9090 &amp;
</code></pre><p>View values for the new metric via the <a href=http://localhost:9090/graph#%5B%7B%22range_input%22%3A%221h%22%2C%22expr%22%3A%22istio_mongo_received_bytes%22%2C%22tab%22%3A1%7D%5D>Prometheus UI</a>.</p><p>The provided link opens the Prometheus UI and executes a query for values of
the <code>istio_mongo_received_bytes</code> metric. The table displayed in the
<strong>Console</strong> tab includes entries similar to:</p><pre><code class=language-plain data-expandlinks=true>istio_mongo_received_bytes{destination_version=&#34;v1&#34;,instance=&#34;172.17.0.18:42422&#34;,job=&#34;istio-mesh&#34;,source_service=&#34;ratings-v2&#34;,source_version=&#34;v2&#34;}
</code></pre></li></ol><h2 id=understanding-tcp-telemetry-collection>Understanding TCP telemetry collection</h2><p>In this task, you added Istio configuration that instructed Mixer to
automatically generate and report a new metric for all traffic to a TCP service
within the mesh.</p><p>Similar to the <a href=/v1.2/docs/tasks/telemetry/metrics/collecting-metrics/>Collecting Metrics and
Logs</a> Task, the new
configuration consisted of <em>instances</em>, a <em>handler</em>, and a <em>rule</em>. Please see
that Task for a complete description of the components of metric collection.</p><p>Metrics collection for TCP services differs only in the limited set of
attributes that are available for use in <em>instances</em>.</p><h3 id=tcp-attributes>TCP attributes</h3><p>Several TCP-specific attributes enable TCP policy and control within Istio.
These attributes are generated by server-side Envoy proxies. They are forwarded to Mixer at connection establishment, and forwarded periodically when connection is alive (periodical report), and forwarded at connection close (final report). The default interval for periodical report is 10 seconds, and it should be at least 1 second. Additionally, context attributes provide the ability to distinguish between <code>http</code> and <code>tcp</code>
protocols within policies.</p><figure style=width:100%><div class=wrapper-with-intrinsic-ratio style=padding-bottom:393.1216931216931%><a data-skipendnotes=true href=/v1.2/docs/tasks/telemetry/metrics/tcp-metrics/./istio-tcp-attribute-flow.svg title="TCP Attribute Flow"><img class=element-to-stretch src=/v1.2/docs/tasks/telemetry/metrics/tcp-metrics/./istio-tcp-attribute-flow.svg alt="Attribute Generation Flow for TCP Services in an Istio Mesh."></a></div><figcaption>TCP Attribute Flow</figcaption></figure><h2 id=cleanup>Cleanup</h2><ul><li><p>Remove the new telemetry configuration:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/telemetry/tcp-metrics.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl delete -f @samples/bookinfo/telemetry/tcp-metrics.yaml@
</code></pre></div><p>If you are using Istio 1.1.2 or prior:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.2/samples/bookinfo/telemetry/tcp-metrics-crd.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true>$ kubectl delete -f @samples/bookinfo/telemetry/tcp-metrics-crd.yaml@
</code></pre></div></li><li><p>Remove the <code>port-forward</code> process:</p><pre><code class=language-bash data-expandlinks=true>$ killall kubectl
</code></pre></li><li><p>If you are not planning to explore any follow-on tasks, refer to the
<a href=/v1.2/docs/examples/bookinfo/#cleanup>Bookinfo cleanup</a> instructions
to shutdown the application.</p></li></ul><nav id=see-also><h2>See also</h2><div class=see-also><div class=entry><p class=link><a data-skipendnotes=true href=/v1.2/docs/tasks/telemetry/metrics/collecting-metrics/>Collecting Metrics</a></p><p class=desc>This task shows you how to configure Istio to collect and customize metrics.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.2/docs/tasks/telemetry/metrics/querying-metrics/>Querying Metrics from Prometheus</a></p><p class=desc>This task shows you how to query for Istio Metrics using Prometheus.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.2/blog/2018/egress-mongo/>Consuming External MongoDB Services</a></p><p class=desc>Describes a simple scenario based on Istio&#39;s Bookinfo example.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.2/blog/2018/egress-tcp/>Consuming External TCP Services</a></p><p class=desc>Describes a simple scenario based on Istio&#39;s Bookinfo example.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.2/blog/2017/mixer-spof-myth/>Mixer and the SPOF Myth</a></p><p class=desc>Improving availability and reducing latency.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.2/blog/2017/adapter-model/>Mixer Adapter Model</a></p><p class=desc>Provides an overview of Mixer&#39;s plug-in architecture.</p></div></div></nav></article><nav class=pagenav><div class=left><a title="This task shows you how to configure Istio to collect and customize metrics." href=/v1.2/docs/tasks/telemetry/metrics/collecting-metrics/><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#left-arrow"/></svg>Collecting Metrics</a></div><div class=right><a title="This task shows you how to query for Istio Metrics using Prometheus." href=/v1.2/docs/tasks/telemetry/metrics/querying-metrics/>Querying Metrics from Prometheus<svg class="icon"><use xlink:href="/v1.2/img/icons.svg#right-arrow"/></svg></a></div></nav><div id=endnotes-container aria-hidden=true><h2>Links</h2><ol id=endnotes></ol></div></div><div class=toc-container><nav class=toc aria-label="Table of Contents"><div id=toc><ol><li role=none aria-label="Before you begin"><a href=#before-you-begin>Before you begin</a><li role=none aria-label="Collecting new telemetry data"><a href=#collecting-new-telemetry-data>Collecting new telemetry data</a><li role=none aria-label="Understanding TCP telemetry collection"><a href=#understanding-tcp-telemetry-collection>Understanding TCP telemetry collection</a><ol><li role=none aria-label="TCP attributes"><a href=#tcp-attributes>TCP attributes</a></ol></li><li role=none aria-label=Cleanup><a href=#cleanup>Cleanup</a><li role=none aria-label="See also"><a href=#see-also>See also</a></li></ol></div></nav></div></main><footer><div class=user-links><a class=channel title="Go download Istio 1.2.5 now" href=https://github.com/istio/istio/releases/tag/1.2.5 aria-label="Download Istio"><span>download</span><svg class="icon"><use xlink:href="/v1.2/img/icons.svg#download"/></svg>
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