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<button id=search-close title="Cancel search" type=reset aria-label="Cancel search"><svg class="icon"><use xlink:href="/v1.3/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=card32 title="Learn about the different parts of the Istio system and the abstractions it uses." aria-controls=card32-body><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#concepts"/></svg>Concepts</button><div class=body aria-labelledby=card32 role=region id=card32-body><ul role=tree aria-expanded=true class=leaf-section aria-labelledby=card32><li role=none><a role=treeitem title="Introduces Istio, the problems it solves, its high-level architecture and design goals." href=/v1.3/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=/v1.3/docs/concepts/traffic-management/>Traffic Management</a></li><li role=none><a role=treeitem title="Describes Istio's authorization and authentication functionality." href=/v1.3/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=/v1.3/docs/concepts/observability/>Observability</a></li><li role=none><a role=treeitem title="Introduces performance and scalability for Istio." href=/v1.3/docs/concepts/performance-and-scalability/>Performance and Scalability</a></li><li role=none><a role=treeitem title="Describes the system models that impact your overall Istio depolyment." href=/v1.3/docs/concepts/deployment-models/>Deployment Models</a></li></ul></div></div><div class=card><button class="header dynamic" id=card49 title="Instructions for installing the Istio control plane on Kubernetes and adding virtual machines into the mesh." aria-controls=card49-body><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#setup"/></svg>Setup</button><div class="body default" aria-labelledby=card49 role=region id=card49-body><ul role=tree aria-expanded=true aria-labelledby=card49><li role=none><a role=treeitem title="Download, install, and try out Istio." href=/v1.3/docs/setup/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=/v1.3/docs/setup/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=/v1.3/docs/setup/platform-setup/alicloud/>Alibaba Cloud</a></li><li role=none><a role=treeitem title="Instructions to setup an Azure cluster for Istio." href=/v1.3/docs/setup/platform-setup/azure/>Azure</a></li><li role=none><a role=treeitem title="Instructions to setup Docker Desktop for Istio." href=/v1.3/docs/setup/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=/v1.3/docs/setup/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=/v1.3/docs/setup/platform-setup/ibm/>IBM Cloud</a></li><li role=none><a role=treeitem title="Instructions to setup a Gardener cluster for Istio." href=/v1.3/docs/setup/platform-setup/gardener/>Kubernetes Gardener</a></li><li role=none><a role=treeitem title="Instructions to setup MicroK8s for use with Istio." href=/v1.3/docs/setup/platform-setup/microk8s/>MicroK8s</a></li><li role=none><a role=treeitem title="Instructions to setup minikube for Istio." href=/v1.3/docs/setup/platform-setup/minikube/>Minikube</a></li><li role=none><a role=treeitem title="Instructions to setup an OpenShift cluster for Istio." href=/v1.3/docs/setup/platform-setup/openshift/>OpenShift</a></li><li role=none><a role=treeitem title="Instructions to setup an OKE cluster for Istio." href=/v1.3/docs/setup/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=/v1.3/docs/setup/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=/v1.3/docs/setup/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=/v1.3/docs/setup/install/helm/>Customizable Install with Helm</a></li><li role=none><a role=treeitem title="Install and configure Istio using the Istio Operator CLI." href=/v1.3/docs/setup/install/operator/>Operator CLI-based Installation [Experimental]</a></li><li role=treeitem aria-label="Multi-cluster Installation"><button aria-hidden=true></button><a title="Configure an Istio mesh spanning multiple Kubernetes clusters." href=/v1.3/docs/setup/install/multicluster/>Multi-cluster 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 replicated control plane instances." href=/v1.3/docs/setup/install/multicluster/gateways/>Replicated 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=/v1.3/docs/setup/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 disconnected cluster networks." href=/v1.3/docs/setup/install/multicluster/shared-gateways/>Shared control plane (multi-network)</a></li></ul></li></ul></li><li role=treeitem aria-label=Upgrade><button aria-hidden=true></button><a title="Information on upgrading Istio." href=/v1.3/docs/setup/upgrade/>Upgrade</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Important changes to consider when upgrading to Istio 1.3." href=/v1.3/docs/setup/upgrade/notice/>1.3 Upgrade Notice</a></li><li role=none><a role=treeitem title="Upgrade the Istio control plane and data plane independently." href=/v1.3/docs/setup/upgrade/steps/>Upgrade Steps</a></li></ul></li><li role=treeitem aria-label="More Guides"><button class=show aria-hidden=true></button><a title="More information on additional setup tasks." href=/v1.3/docs/setup/additional-setup/>More Guides</a><ul role=group aria-expanded=true class=leaf-section><li role=none><a role=treeitem title="Prepare your Kubernetes pods and services to run in an Istio-enabled cluster." href=/v1.3/docs/setup/additional-setup/requirements/>Pods and Services</a></li><li role=none><a role=treeitem title="Describes the built-in Istio installation configuration profiles." href=/v1.3/docs/setup/additional-setup/config-profiles/>Installation Configuration Profiles</a></li><li role=none><span role=treeitem class=current title="Install the Istio sidecar in application pods automatically using the sidecar injector webhook or manually using istioctl CLI.">Installing the Sidecar</span></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=/v1.3/docs/setup/additional-setup/cni/>Install Istio with the Istio CNI plugin</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card72 title="How to do single specific targeted activities with the Istio system." aria-controls=card72-body><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#tasks"/></svg>Tasks</button><div class=body aria-labelledby=card72 role=region id=card72-body><ul role=tree aria-expanded=true aria-labelledby=card72><li role=treeitem aria-label="Traffic Management"><button aria-hidden=true></button><a title="Tasks that demonstrate Istio's traffic routing features." href=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/docs/tasks/security/authz-permissive/>Authorization permissive mode</a></li><li role=none><a role=treeitem title="Shows you how to verify and test Istio's automatic mutual TLS authentication." href=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/docs/tasks/security/auth-sds/>Provisioning Identity through SDS</a></li><li role=none><a role=treeitem title="Configure which namespaces Citadel should generate service account secrets for." href=/v1.3/docs/tasks/security/ca-namespace-targeting/>Configure Citadel Service Account Secret Generation</a></li><li role=none><a role=treeitem title="Shows you how to incrementally migrate your Istio services to mutual TLS." href=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/docs/tasks/policy-enforcement/denial-and-list/>Denials and White/Black Listing</a></li></ul></li><li role=treeitem aria-label=Telemetry><button aria-hidden=true></button><a title="Demonstrates how to collect telemetry information from the mesh." href=/v1.3/docs/tasks/telemetry/>Telemetry</a><ul role=group aria-expanded=false><li role=treeitem aria-label=Metrics><button aria-hidden=true></button><a title="Demonstrates the configuration, collection, and processing of Istio mesh metrics." href=/v1.3/docs/tasks/telemetry/metrics/>Metrics</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 metrics." href=/v1.3/docs/tasks/telemetry/metrics/collecting-metrics/>Collecting Metrics</a></li><li role=none><a role=treeitem title="This task shows you how to configure Istio to collect metrics for TCP services." href=/v1.3/docs/tasks/telemetry/metrics/tcp-metrics/>Collecting Metrics for TCP services</a></li><li role=none><a role=treeitem title="This task shows you how to query for Istio Metrics using Prometheus." href=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/docs/tasks/telemetry/logs/access-log/>Getting Envoy'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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/docs/tasks/telemetry/gateways/>Remotely Accessing Telemetry Addons</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card90 title="A variety of fully working example uses for Istio that you can experiment with." aria-controls=card90-body><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#examples"/></svg>Examples</button><div class=body aria-labelledby=card90 role=region id=card90-body><ul role=tree aria-expanded=true aria-labelledby=card90><li role=none><a role=treeitem title="Deploys a sample application composed of four separate microservices used to demonstrate various Istio features." href=/v1.3/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=/v1.3/docs/examples/endpoints/>Install Istio for Google Cloud Endpoints Services</a></li><li role=treeitem aria-label="Mesh Expansion"><button aria-hidden=true></button><a title="Configure an Istio mesh spanning Kubernetes clusters, VMs and bare metals." href=/v1.3/docs/examples/mesh-expansion/>Mesh Expansion</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Integrate VMs and bare metal hosts into an Istio mesh deployed on Kubernetes." href=/v1.3/docs/examples/mesh-expansion/single-network/>Single-network Mesh Expansion</a></li><li role=none><a role=treeitem title="Integrate VMs and bare metal hosts into an Istio mesh deployed on Kubernetes with gateways." href=/v1.3/docs/examples/mesh-expansion/multi-network/>Multi-network Mesh Expansion</a></li><li role=none><a role=treeitem title="Illustrates how to expand the Bookinfo application's mesh with a raw VM service." href=/v1.3/docs/examples/mesh-expansion/bookinfo-expanded/>Bookinfo with Mesh Expansion</a></li></ul></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=/v1.3/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=/v1.3/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=/v1.3/docs/examples/multicluster/icp/>IBM Cloud Private</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card104 title="Hints, tips, tricks about running an Istio mesh." aria-controls=card104-body><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#guide"/></svg>Operations</button><div class=body aria-labelledby=card104 role=region id=card104-body><ul role=tree aria-expanded=true aria-labelledby=card104><li role=none><a role=treeitem title="Shows how to do health checking for Istio services." href=/v1.3/docs/ops/app-health-check/>Health Checking of Istio Services</a></li><li role=treeitem aria-label="Installation and Configuration"><button aria-hidden=true></button><a title="Describes important requirements, concepts, and considerations for installing and configuring Istio." href=/v1.3/docs/ops/setup/>Installation and Configuration</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Describes Istio's use of Kubernetes webhooks for automatic sidecar injection." href=/v1.3/docs/ops/setup/injection-concepts/>Automatic Sidecar Injection</a></li><li role=none><a role=treeitem title="Describes how to check which capabilities are allowed for your pods." href=/v1.3/docs/ops/setup/required-pod-capabilities/>Required Pod Capabilities</a></li><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=/v1.3/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=/v1.3/docs/ops/setup/validation/>Configuration Validation Webhook</a></li></ul></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=/v1.3/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=/v1.3/docs/ops/traffic-management/introduction/>Introduction to Network Operations</a></li><li role=none><a role=treeitem title="Provides specific deployment or configuration guidelines to avoid networking or traffic management issues." href=/v1.3/docs/ops/traffic-management/deploy-guidelines/>Avoiding Traffic Management Issues</a></li><li role=none><a role=treeitem title="Information on how to enable and understand Locality Load Balancing." href=/v1.3/docs/ops/traffic-management/locality-load-balancing/>Locality Load Balancing</a></li><li role=none><a role=treeitem title="Information on how to specify protocols." href=/v1.3/docs/ops/traffic-management/protocol-selection/>Protocol Selection</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=/v1.3/docs/ops/security/>Security</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Use hardened container images to reduce Istio's attack surface." href=/v1.3/docs/ops/security/harden-docker-images/>Harden Docker Container Images</a></li><li role=none><a role=treeitem title="Learn how to extend the lifetime of the Istio self-signed root certificate." href=/v1.3/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=/v1.3/docs/ops/telemetry/>Telemetry</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="How to enable in-proxy generation of HTTP service-level metrics." href=/v1.3/docs/ops/telemetry/in-proxy-service-telemetry/>Generate Istio Metrics Without Mixer [Experimental]</a></li><li role=none><a role=treeitem title="Fine-grained control of Envoy statistics." href=/v1.3/docs/ops/telemetry/envoy-stats/>Envoy Statistics</a></li></ul></li><li role=treeitem aria-label=Troubleshooting><button aria-hidden=true></button><a title="Describes how to identify and resolve common problems in Istio." href=/v1.3/docs/ops/troubleshooting/>Troubleshooting</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Istio includes a supplemental tool that provides debugging and diagnosis for Istio service mesh deployments." href=/v1.3/docs/ops/troubleshooting/istioctl/>Using the istioctl command-line tool</a></li><li role=none><a role=treeitem title="Tools and techniques to address common Istio traffic management and network problems." href=/v1.3/docs/ops/troubleshooting/network-issues/>Network Problems</a></li><li role=none><a role=treeitem title="Tools and techniques to address common Istio authentication, authorization, and general security-related problems." href=/v1.3/docs/ops/troubleshooting/security-issues/>Security Problems</a></li><li role=none><a role=treeitem title="Resolve common problems with Istio's use of Kubernetes webhooks for automatic sidecar injection." href=/v1.3/docs/ops/troubleshooting/injection/>Sidecar Injection Problems</a></li><li role=none><a role=treeitem title="What to do if Citadel is not behaving properly." href=/v1.3/docs/ops/troubleshooting/repairing-citadel/>Repairing Citadel</a></li><li role=none><a role=treeitem title="Describes tools and techniques to diagnose Envoy configuration issues related to traffic management." href=/v1.3/docs/ops/troubleshooting/proxy-cmd/>Debugging Envoy and Pilot</a></li><li role=none><a role=treeitem title="Describes how to resolve Galley configuration problems." href=/v1.3/docs/ops/troubleshooting/validation/>Galley Configuration Problems</a></li><li role=none><a role=treeitem title="Diagnose problems where metrics are not being collected." href=/v1.3/docs/ops/troubleshooting/missing-metrics/>Missing Metrics</a></li><li role=none><a role=treeitem title="Dealing with Grafana issues." href=/v1.3/docs/ops/troubleshooting/grafana/>Missing Grafana Output</a></li><li role=none><a role=treeitem title="Fix missing traces in Zipkin." href=/v1.3/docs/ops/troubleshooting/missing-traces/>Missing Zipkin Traces</a></li><li role=none><a role=treeitem title="Shows you how to use istioctl describe to verify the configurations of a pod in your mesh." href=/v1.3/docs/ops/troubleshooting/istioctl-describe/>Understand your Mesh with istioctl describe</a></li><li role=none><a role=treeitem title="Describes how to use component-level logging to get insights into a running component's behavior." href=/v1.3/docs/ops/troubleshooting/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=/v1.3/docs/ops/troubleshooting/controlz/>Component Introspection</a></li><li role=none><a role=treeitem title="Limitations for using Tcpdump in pods." href=/v1.3/docs/ops/troubleshooting/tcpdump-notes/>Tcpdump Limitations</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card126 title="Detailed authoritative reference material such as command-line options, configuration options, and API calling parameters." aria-controls=card126-body><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#reference"/></svg>Reference</button><div class=body aria-labelledby=card126 role=region id=card126-body><ul role=tree aria-expanded=true aria-labelledby=card126><li role=treeitem aria-label=Configuration><button aria-hidden=true></button><a title="Detailed information on configuration options." href=/v1.3/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=/v1.3/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=/v1.3/docs/reference/config/networking/v1alpha3/destination-rule/>Destination Rule</a></li><li role=none><a role=treeitem title="Customizing Envoy configuration generated by Istio." href=/v1.3/docs/reference/config/networking/v1alpha3/envoy-filter/>Envoy Filter</a></li><li role=none><a role=treeitem title="Configuration affecting edge load balancer." href=/v1.3/docs/reference/config/networking/v1alpha3/gateway/>Gateway</a></li><li role=none><a role=treeitem title="Configuration affecting service registry." href=/v1.3/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=/v1.3/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=/v1.3/docs/reference/config/networking/v1alpha3/virtual-service/>Virtual Service</a></li></ul></li><li role=none><a role=treeitem title="Authentication policy for Istio services." href=/v1.3/docs/reference/config/istio.authentication.v1alpha1/>Authentication Policy</a></li><li role=none><a role=treeitem title="Resource annotations used by Istio." href=/v1.3/docs/reference/config/annotations/>Resource Annotations</a></li><li role=treeitem aria-label=Authorization><button aria-hidden=true></button><a title="Describes how to configure Istio's authorization features." href=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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-1.2 and release-1.3." href=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/docs/reference/config/policy-and-telemetry/adapters/apigee/>Apigee</a></li><li role=none><a role=treeitem title="Adapter to enforce authentication and authorization policies for web apps and APIs." href=/v1.3/docs/reference/config/policy-and-telemetry/adapters/app-identity-access-adapter/>App Identity and Access</a></li><li role=none><a role=treeitem title="Adapter for circonus.com's monitoring solution." href=/v1.3/docs/reference/config/policy-and-telemetry/adapters/circonus/>Circonus</a></li><li role=none><a role=treeitem title="Adapter for cloudmonitor metrics." href=/v1.3/docs/reference/config/policy-and-telemetry/adapters/cloudmonitor/>CloudMonitor</a></li><li role=none><a role=treeitem title="Adapter for cloudwatch metrics." href=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/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=/v1.3/docs/reference/config/policy-and-telemetry/istio.policy.v1beta1/>Rules</a></li></ul></li><li role=none><a role=treeitem title="Configuration for Istio control plane installation through the Operator." href=/v1.3/docs/reference/config/istio.operator.v1alpha12.pb/>Operator Installation</a></li><li role=none><a role=treeitem title="Configuration affecting the service mesh as a whole." href=/v1.3/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=/v1.3/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=/v1.3/docs/reference/commands/galley/>galley</a></li><li role=none><a role=treeitem title="Istio Certificate Authority (CA)." href=/v1.3/docs/reference/commands/istio_ca/>istio_ca</a></li><li role=none><a role=treeitem title="Istio control interface." href=/v1.3/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=/v1.3/docs/reference/commands/mixs/>mixs</a></li><li role=none><a role=treeitem title="Istio security per-node agent." href=/v1.3/docs/reference/commands/node_agent/>node_agent</a></li><li role=none><a role=treeitem title="The Istio operator." href=/v1.3/docs/reference/commands/operator/>operator</a></li><li role=none><a role=treeitem title="Istio Pilot agent." href=/v1.3/docs/reference/commands/pilot-agent/>pilot-agent</a></li><li role=none><a role=treeitem title="Istio Pilot." href=/v1.3/docs/reference/commands/pilot-discovery/>pilot-discovery</a></li><li role=none><a role=treeitem title="Kubernetes webhook for automatic Istio sidecar injection." href=/v1.3/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=/v1.3/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="/v1.3/img/icons.svg#pull"/></svg></button><nav aria-label=Breadcrumb><ol><li><a href=/v1.3/ title="Connect, secure, control, and observe services.">Istio</a></li><li><a href=/v1.3/docs/ title="Learn how to deploy, use, and operate Istio.">Docs</a></li><li><a href=/v1.3/docs/setup/ title="Instructions for installing the Istio control plane on Kubernetes and adding virtual machines into the mesh.">Setup</a></li><li><a href=/v1.3/docs/setup/additional-setup/ title="More information on additional setup tasks.">More Guides</a></li><li>Installing the Sidecar</li></ol></nav><article aria-labelledby=title><div class=title-area><div><h1 id=title>Installing the Sidecar</h1><p class=byline><span title="1484 words"><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#clock"/></svg><span> </span>7 minute read</span></p></div></div><nav class=toc-inlined aria-label="Table of Contents"><div><hr><ol><li role=none aria-label=Injection><a href=#injection>Injection</a><ol><li role=none aria-label="Manual sidecar injection"><a href=#manual-sidecar-injection>Manual sidecar injection</a><li role=none aria-label="Automatic sidecar injection"><a href=#automatic-sidecar-injection>Automatic sidecar injection</a><ol><li role=none aria-label="Disabling or updating the webhook"><a href=#disabling-or-updating-the-webhook>Disabling or updating the webhook</a><li role=none aria-label="Deploying an app"><a href=#deploying-an-app>Deploying an app</a><li role=none aria-label="Understanding what happened"><a href=#understanding-what-happened>Understanding what happened</a><ol><li role=none aria-label=policy><a href=#policy><em><strong>policy</strong></em></a><li role=none aria-label=template><a href=#template><em><strong>template</strong></em></a></ol></li><li role=none aria-label="More control: adding exceptions"><a href=#more-control-adding-exceptions>More control: adding exceptions</a><li role=none aria-label="Uninstalling the automatic sidecar injector"><a href=#uninstalling-the-automatic-sidecar-injector>Uninstalling the automatic sidecar injector</a></ol></li></ol></li><li role=none aria-label="See also"><a href=#see-also>See also</a></li></ol><hr></div></nav><h2 id=injection>Injection</h2><p>In order to take advantage of all of Istio’s features, pods in the mesh must be running an Istio sidecar proxy.</p><p>The following sections describe two
|
||
ways of injecting the Istio sidecar into a pod: manually using the <a href=/v1.3/docs/reference/commands/istioctl><code>istioctl</code></a>
|
||
command or automatically using the Istio sidecar injector.</p><p>Manual injection directly modifies configuration, like deployments, and injects the proxy configuration into it.</p><p>Automatic injection injects at pod creation time using an admission controller.</p><p>Injection occurs by applying a template defined in the <code>istio-sidecar-injector</code> ConfigMap.</p><h3 id=manual-sidecar-injection>Manual sidecar injection</h3><p>To manually inject a deployment, use <a href=/v1.3/docs/reference/commands/istioctl/#istioctl-kube-inject><code>istioctl kube-inject</code></a>:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.3/samples/sleep/sleep.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl kube-inject -f @samples/sleep/sleep.yaml@ | kubectl apply -f -
|
||
</code></pre></div><p>By default, this will use the in-cluster configuration. Alternatively, injection can be done using local copies of the configuration.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl -n istio-system get configmap istio-sidecar-injector -o=jsonpath='{.data.config}' > inject-config.yaml
|
||
$ kubectl -n istio-system get configmap istio-sidecar-injector -o=jsonpath='{.data.values}' > inject-values.yaml
|
||
$ kubectl -n istio-system get configmap istio -o=jsonpath='{.data.mesh}' > mesh-config.yaml
|
||
</code></pre><p>Run <code>kube-inject</code> over the input file and deploy.</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.3/samples/sleep/sleep.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl kube-inject \
|
||
--injectConfigFile inject-config.yaml \
|
||
--meshConfigFile mesh-config.yaml \
|
||
--valuesFile inject-values.yaml \
|
||
--filename @samples/sleep/sleep.yaml@ \
|
||
| kubectl apply -f -
|
||
</code></pre></div><p>Verify that the sidecar has been injected into the sleep pod with <code>2/2</code> under the READY column.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl get pod -l app=sleep
|
||
NAME READY STATUS RESTARTS AGE
|
||
sleep-64c6f57bc8-f5n4x 2/2 Running 0 24s
|
||
</code></pre><h3 id=automatic-sidecar-injection>Automatic sidecar injection</h3><p>Sidecars can be automatically added to applicable Kubernetes pods using a
|
||
<a href=https://kubernetes.io/docs/admin/admission-controllers/>mutating webhook admission controller</a> provided by Istio.</p><div><aside class="callout tip"><div class=type><svg class="large-icon"><use xlink:href="/v1.3/img/icons.svg#callout-tip"/></svg></div><div class=content>While admission controllers are enabled by default, some Kubernetes distributions may disable them. If this is the case, follow the instructions to <a href=https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#how-do-i-turn-on-an-admission-controller>turn on admission controllers</a>.</div></aside></div><p>When the injection webhook is enabled, any new pods that are created will automatically have a sidecar added to them.</p><p>Note that unlike manual injection, automatic injection occurs at the pod-level. You won’t see any change to the deployment itself. Instead you’ll want to check individual pods (via <code>kubectl describe</code>) to see the injected proxy.</p><h4 id=disabling-or-updating-the-webhook>Disabling or updating the webhook</h4><p>The sidecar injecting webhook is enabled by default. If you wish to disable the webhook, you can
|
||
use <a href=/v1.3/docs/setup/install/helm/>Helm</a> to set option <code>sidecarInjectorWebhook.enabled</code> to <code>false</code>.</p><p>There are also a <a href=/v1.3/docs/reference/config/installation-options/#sidecarinjectorwebhook-options>variety of other options</a> that can be configured.</p><h4 id=deploying-an-app>Deploying an app</h4><p>Deploy sleep app. Verify both deployment and pod have a single container.</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.3/samples/sleep/sleep.yaml>Zip</a><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl apply -f @samples/sleep/sleep.yaml@
|
||
$ kubectl get deployment -o wide
|
||
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
|
||
sleep 1 1 1 1 12m sleep tutum/curl app=sleep
|
||
</code></pre></div><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl get pod
|
||
NAME READY STATUS RESTARTS AGE
|
||
sleep-776b7bcdcd-7hpnk 1/1 Running 0 4
|
||
</code></pre><p>Label the <code>default</code> namespace with <code>istio-injection=enabled</code></p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl label namespace default istio-injection=enabled
|
||
$ kubectl get namespace -L istio-injection
|
||
NAME STATUS AGE ISTIO-INJECTION
|
||
default Active 1h enabled
|
||
istio-system Active 1h
|
||
kube-public Active 1h
|
||
kube-system Active 1h
|
||
</code></pre><p>Injection occurs at pod creation time. Kill the running pod and verify a new pod is created with the injected sidecar. The original pod has 1/1 READY containers and the pod with injected sidecar has 2/2 READY containers.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl delete pod -l app=sleep
|
||
$ kubectl get pod -l app=sleep
|
||
NAME READY STATUS RESTARTS AGE
|
||
sleep-776b7bcdcd-7hpnk 1/1 Terminating 0 1m
|
||
sleep-776b7bcdcd-bhn9m 2/2 Running 0 7s
|
||
</code></pre><p>View detailed state of the injected pod. You should see the injected <code>istio-proxy</code> container and corresponding volumes. Be sure to substitute the correct name for the <code>Running</code> pod below.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl describe pod -l app=sleep
|
||
</code></pre><p>Disable injection for the <code>default</code> namespace and verify new pods are created without the sidecar.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl label namespace default istio-injection-
|
||
$ kubectl delete pod -l app=sleep
|
||
$ kubectl get pod
|
||
NAME READY STATUS RESTARTS AGE
|
||
sleep-776b7bcdcd-bhn9m 2/2 Terminating 0 2m
|
||
sleep-776b7bcdcd-gmvnr 1/1 Running 0 2s
|
||
</code></pre><h4 id=understanding-what-happened>Understanding what happened</h4><p>When Kubernetes invokes the webhook, the <a href=https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.10/#mutatingwebhookconfiguration-v1beta1-admissionregistration-k8s-io>admissionregistration.k8s.io/v1beta1#MutatingWebhookConfiguration</a>
|
||
configuration is applied. The default configuration injects the sidecar into
|
||
pods in any namespace with the <code>istio-injection=enabled label</code>. The
|
||
<code>istio-sidecar-injector</code> configuration map specifies the configuration for the
|
||
injected sidecar. To change how namespaces are selected for injection, you can
|
||
edit the <code>MutatingWebhookConfiguration</code> with the following command:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl edit mutatingwebhookconfiguration istio-sidecar-injector
|
||
</code></pre><div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.3/img/icons.svg#callout-warning"/></svg></div><div class=content>You should restart the sidecar injector pod(s) after modifying
|
||
the <code>MutatingWebhookConfiguration</code>.</div></aside></div><p>For example, you can modify the <code>MutatingWebhookConfiguration</code> to always inject
|
||
the sidecar into every namespace, unless a label is set. Editing this
|
||
configuration is an advanced operation. Refer to the Kubernetes documentation
|
||
for the <a href=https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.10/#mutatingwebhookconfiguration-v1beta1-admissionregistration-k8s-io><code>MutatingWebhookConfiguration</code> API</a>
|
||
for more information.</p><h5 id=policy><em><strong>policy</strong></em></h5><p><code>disabled</code> - The sidecar injector will not inject the sidecar into
|
||
pods by default. Add the <code>sidecar.istio.io/inject</code> annotation with
|
||
value <code>true</code> to the pod template spec to override the default and enable injection.</p><p><code>enabled</code> - The sidecar injector will inject the sidecar into pods by
|
||
default. Add the <code>sidecar.istio.io/inject</code> annotation with
|
||
value <code>false</code> to the pod template spec to override the default and disable injection.</p><p>The following example uses the <code>sidecar.istio.io/inject</code> annotation to disable sidecar injection.</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: extensions/v1beta1
|
||
kind: Deployment
|
||
metadata:
|
||
name: ignored
|
||
spec:
|
||
template:
|
||
metadata:
|
||
annotations:
|
||
sidecar.istio.io/inject: "false"
|
||
spec:
|
||
containers:
|
||
- name: ignored
|
||
image: tutum/curl
|
||
command: ["/bin/sleep","infinity"]
|
||
</code></pre><h5 id=template><em><strong>template</strong></em></h5><p>The sidecar injection template uses <a href=https://golang.org/pkg/text/template>https://golang.org/pkg/text/template</a> which,
|
||
when parsed and executed, is decoded to the following
|
||
struct containing the list of containers and volumes to inject into the pod.</p><pre><code class=language-go data-expandlinks=true data-repo=istio>type SidecarInjectionSpec struct {
|
||
RewriteAppHTTPProbe bool `yaml:"rewriteAppHTTPProbe"`
|
||
InitContainers []corev1.Container `yaml:"initContainers"`
|
||
Containers []corev1.Container `yaml:"containers"`
|
||
Volumes []corev1.Volume `yaml:"volumes"`
|
||
DNSConfig *corev1.PodDNSConfig `yaml:"dnsConfig"`
|
||
ImagePullSecrets []corev1.LocalObjectReference `yaml:"imagePullSecrets"`
|
||
}
|
||
</code></pre><p>The template is applied to the following data structure at runtime.</p><pre><code class=language-go data-expandlinks=true data-repo=istio>type SidecarTemplateData struct {
|
||
DeploymentMeta *metav1.ObjectMeta
|
||
ObjectMeta *metav1.ObjectMeta
|
||
Spec *corev1.PodSpec
|
||
ProxyConfig *meshconfig.ProxyConfig // Defined by https://istio.io/docs/reference/config/service-mesh.html#proxyconfig
|
||
MeshConfig *meshconfig.MeshConfig // Defined by https://istio.io/docs/reference/config/service-mesh.html#meshconfig
|
||
}
|
||
</code></pre><p><code>ObjectMeta</code> and <code>Spec</code> are from the pod. <code>ProxyConfig</code> and <code>MeshConfig</code>
|
||
are from the <code>istio</code> ConfigMap in the <code>istio-system</code> namespace. Templates can conditionally
|
||
define injected containers and volumes with this data.</p><p>For example, the following template</p><pre><code class=language-plain data-expandlinks=true data-repo=istio>containers:
|
||
- name: istio-proxy
|
||
image: istio.io/proxy:0.5.0
|
||
args:
|
||
- proxy
|
||
- sidecar
|
||
- --configPath
|
||
- {{ .ProxyConfig.ConfigPath }}
|
||
- --binaryPath
|
||
- {{ .ProxyConfig.BinaryPath }}
|
||
- --serviceCluster
|
||
{{ if ne "" (index .ObjectMeta.Labels "app") -}}
|
||
- {{ index .ObjectMeta.Labels "app" }}
|
||
{{ else -}}
|
||
- "istio-proxy"
|
||
{{ end -}}
|
||
</code></pre><p>expands to</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>containers:
|
||
- name: istio-proxy
|
||
image: istio.io/proxy:0.5.0
|
||
args:
|
||
- proxy
|
||
- sidecar
|
||
- --configPath
|
||
- /etc/istio/proxy
|
||
- --binaryPath
|
||
- /usr/local/bin/envoy
|
||
- --serviceCluster
|
||
- sleep
|
||
</code></pre><p>when applied over a pod defined by the pod template spec in <a href=https://github.com/istio/istio/tree/release-1.3/samples/sleep/sleep.yaml><code>samples/sleep/sleep.yaml</code></a></p><h4 id=more-control-adding-exceptions>More control: adding exceptions</h4><p>There are cases where users do not have control of the pod creation, for instance, when they are created by someone else. Therefore they are unable to add the annotation <code>sidecar.istio.io/inject</code> in the pod, to explicitly instruct Istio whether to install the sidecar or not.</p><p>Think of auxiliary pods that might be created as an intermediate step while deploying an application. <a href=https://docs.okd.io/latest/dev_guide/builds/index.html>OpenShift Builds</a>, for example, creates such pods for building the source code of an application. Once the binary artifact is built, the application pod is ready to run and the auxiliary pods are discarded. Those intermediate pods should not get an Istio sidecar, even if the policy is set to <code>enabled</code> and the namespace is properly labeled to get automatic injection.</p><p>For such cases you can instruct Istio to <strong>not</strong> inject the sidecar on those pods, based on labels that are present in those pods. You can do this by editing the <code>istio-sidecar-injector</code> ConfigMap and adding the entry <code>neverInjectSelector</code>. It is an array of Kubernetes label selectors. They are <code>OR'd</code>, stopping at the first match. See an example:</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: v1
|
||
kind: ConfigMap
|
||
metadata:
|
||
name: istio-sidecar-injector
|
||
data:
|
||
config: |-
|
||
policy: enabled
|
||
neverInjectSelector:
|
||
- matchExpressions:
|
||
- {key: openshift.io/build.name, operator: Exists}
|
||
- matchExpressions:
|
||
- {key: openshift.io/deployer-pod-for.name, operator: Exists}
|
||
template: |-
|
||
initContainers:
|
||
...
|
||
</code></pre><p>The above statement means: Never inject on pods that have the label <code>openshift.io/build.name</code> <strong>or</strong> <code>openshift.io/deployer-pod-for.name</code> – the values of the labels don’t matter, we are just checking if the keys exist. With this rule added, the OpenShift Builds use case illustrated above is covered, meaning auxiliary pods will not have sidecars injected (because source-to-image auxiliary pods <strong>do</strong> contain those labels).</p><p>For completeness, you can also use a field called <code>alwaysInjectSelector</code>, with similar syntax, which will always inject the sidecar on pods that match that label selector, regardless of the global policy.</p><p>The label selector approach gives a lot of flexibility on how to express those exceptions. Take a look at <a href=https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#resources-that-support-set-based-requirements>these docs</a> to see what you can do with them!</p><div><aside class="callout tip"><div class=type><svg class="large-icon"><use xlink:href="/v1.3/img/icons.svg#callout-tip"/></svg></div><div class=content><p>It’s worth noting that annotations in the pods have higher precedence than the label selectors. If a pod is annotated with <code>sidecar.istio.io/inject: "true/false"</code> then it will be honored. So, the order of evaluation is:</p><p><code>Pod Annotations → NeverInjectSelector → AlwaysInjectSelector → Default Policy</code></p></div></aside></div><h4 id=uninstalling-the-automatic-sidecar-injector>Uninstalling the automatic sidecar injector</h4><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl delete mutatingwebhookconfiguration istio-sidecar-injector
|
||
$ kubectl -n istio-system delete service istio-sidecar-injector
|
||
$ kubectl -n istio-system delete deployment istio-sidecar-injector
|
||
$ kubectl -n istio-system delete serviceaccount istio-sidecar-injector-service-account
|
||
$ kubectl delete clusterrole istio-sidecar-injector-istio-system
|
||
$ kubectl delete clusterrolebinding istio-sidecar-injector-admin-role-binding-istio-system
|
||
</code></pre><p>The above command will not remove the injected sidecars from Pods. A
|
||
rolling update or simply deleting the pods and forcing the deployment
|
||
to create them is required.</p><p>Optionally, it may also be desirable to clean-up other resources that
|
||
were modified in this task.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl label namespace default istio-injection-
|
||
</code></pre><nav id=see-also><h2>See also</h2><div class=see-also><div class=entry><p class=link><a data-skipendnotes=true href=/v1.3/docs/setup/additional-setup/requirements/>Pods and Services</a></p><p class=desc>Prepare your Kubernetes pods and services to run in an Istio-enabled cluster.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.3/blog/2019/data-plane-setup/>Demystifying Istio's Sidecar Injection Model</a></p><p class=desc>De-mystify how Istio manages to plugin its data-plane components into an existing deployment.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.3/docs/setup/additional-setup/cni/>Install Istio with the Istio CNI plugin</a></p><p class=desc>Install and use Istio with the Istio CNI plugin, allowing operators to deploy services with lower privilege.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.3/docs/setup/install/helm/>Customizable Install with Helm</a></p><p class=desc>Install and configure Istio for in-depth evaluation or production use.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.3/docs/setup/platform-setup/docker/>Docker Desktop</a></p><p class=desc>Instructions to setup Docker Desktop for Istio.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.3/docs/setup/getting-started/>Getting Started</a></p><p class=desc>Download, install, and try out Istio.</p></div></div></nav></article><nav class=pagenav><div class=left><a title="Describes the built-in Istio installation configuration profiles." href=/v1.3/docs/setup/additional-setup/config-profiles/><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#left-arrow"/></svg>Installation Configuration Profiles</a></div><div class=right><a title="Install and use Istio with the Istio CNI plugin, allowing operators to deploy services with lower privilege." href=/v1.3/docs/setup/additional-setup/cni/>Install Istio with the Istio CNI plugin<svg class="icon"><use xlink:href="/v1.3/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=Injection><a href=#injection>Injection</a><ol><li role=none aria-label="Manual sidecar injection"><a href=#manual-sidecar-injection>Manual sidecar injection</a><li role=none aria-label="Automatic sidecar injection"><a href=#automatic-sidecar-injection>Automatic sidecar injection</a><ol><li role=none aria-label="Disabling or updating the webhook"><a href=#disabling-or-updating-the-webhook>Disabling or updating the webhook</a><li role=none aria-label="Deploying an app"><a href=#deploying-an-app>Deploying an app</a><li role=none aria-label="Understanding what happened"><a href=#understanding-what-happened>Understanding what happened</a><ol><li role=none aria-label=policy><a href=#policy><em><strong>policy</strong></em></a><li role=none aria-label=template><a href=#template><em><strong>template</strong></em></a></ol></li><li role=none aria-label="More control: adding exceptions"><a href=#more-control-adding-exceptions>More control: adding exceptions</a><li role=none aria-label="Uninstalling the automatic sidecar injector"><a href=#uninstalling-the-automatic-sidecar-injector>Uninstalling the automatic sidecar injector</a></ol></li></ol></li><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 1.3.5 now" href=/v1.3/docs/setup#downloading-the-release aria-label="Download Istio"><span>download</span><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#download"/></svg>
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1.3.5<br>© 2019 Istio Authors, <a href=https://policies.google.com/privacy>Privacy Policy</a><br>Archived on November 14, 2019</p></div><div class=dev-links><a class=channel title="GitHub is where development takes place on Istio code" href=https://github.com/istio/community aria-label=GitHub><span>github</span><svg class="icon"><use xlink:href="/v1.3/img/icons.svg#github"/></svg></a>
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