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<button id=search-close title="Cancel search" type=reset aria-label="Cancel search"><svg class="icon cancel-x"><use xlink:href="/v1.8/img/icons.svg#cancel-x"/></svg></button></form></nav></header><div class=banner-container></div><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=card17 title="Learn about the different parts of the Istio system and the abstractions it uses." aria-controls=card17-body><svg class="icon concepts"><use xlink:href="/v1.8/img/icons.svg#concepts"/></svg>Concepts</button><div class=body aria-labelledby=card17 role=region id=card17-body><ul role=tree aria-expanded=true class=leaf-section aria-labelledby=card17><li role=none><a role=treeitem title="Introduces Istio, the problems it solves, its high-level architecture, and its design goals." href=/v1.8/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=/v1.8/docs/concepts/traffic-management/>Traffic Management</a></li><li role=none><a role=treeitem title="Describes Istio's authorization and authentication functionality." href=/v1.8/docs/concepts/security/>Security</a></li><li role=none><a role=treeitem title="Describes the telemetry and monitoring features provided by Istio." href=/v1.8/docs/concepts/observability/>Observability</a></li><li role=none><a role=treeitem title="Describes Istio's WebAssembly Plugin system." href=/v1.8/docs/concepts/wasm/>Extensibility</a></li></ul></div></div><div class=card><button class="header dynamic" id=card40 title="Instructions for installing the Istio control plane on Kubernetes." aria-controls=card40-body><svg class="icon setup"><use xlink:href="/v1.8/img/icons.svg#setup"/></svg>Setup</button><div class=body aria-labelledby=card40 role=region id=card40-body><ul role=tree aria-expanded=true aria-labelledby=card40><li role=none><a role=treeitem title="Try Istio’s features quickly and easily." href=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/docs/setup/platform-setup/azure/>Azure</a></li><li role=none><a role=treeitem title="Instructions to setup Docker Desktop for Istio." href=/v1.8/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=/v1.8/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=/v1.8/docs/setup/platform-setup/ibm/>IBM Cloud</a></li><li role=none><a role=treeitem title="Instructions to setup kind for Istio." href=/v1.8/docs/setup/platform-setup/kind/>kind</a></li><li role=none><a role=treeitem title="Instructions to setup Kops for use with Istio." href=/v1.8/docs/setup/platform-setup/kops/>Kops</a></li><li role=none><a role=treeitem title="Instructions to setup a Gardener cluster for Istio." href=/v1.8/docs/setup/platform-setup/gardener/>Kubernetes Gardener</a></li><li role=none><a role=treeitem title="Instructions to setup a KubeSphere Container Platform for Istio." href=/v1.8/docs/setup/platform-setup/kubesphere/>KubeSphere Container Platform</a></li><li role=none><a role=treeitem title="Instructions to setup MicroK8s for use with Istio." href=/v1.8/docs/setup/platform-setup/microk8s/>MicroK8s</a></li><li role=none><a role=treeitem title="Instructions to setup minikube for Istio." href=/v1.8/docs/setup/platform-setup/minikube/>Minikube</a></li><li role=none><a role=treeitem title="Instructions to setup an OpenShift cluster for Istio." href=/v1.8/docs/setup/platform-setup/openshift/>OpenShift</a></li><li role=none><a role=treeitem title="Instructions to setup an OKE cluster for Istio." href=/v1.8/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=/v1.8/docs/setup/install/>Install</a><ul role=group aria-expanded=false><li role=none><a role=treeitem title="Install and customize any Istio configuration profile for in-depth evaluation or production use." href=/v1.8/docs/setup/install/istioctl/>Install with Istioctl</a></li><li role=none><a role=treeitem title="Instructions to install Istio in a Kubernetes cluster using the Istio operator." href=/v1.8/docs/setup/install/operator/>Istio Operator Install</a></li><li role=none><a role=treeitem title="Install and configure Istio for in-depth evaluation." href=/v1.8/docs/setup/install/helm/>Install with Helm</a></li><li role=treeitem aria-label="Install Multicluster"><button aria-hidden=true></button><a title="Install an Istio mesh across multiple Kubernetes clusters." href=/v1.8/docs/setup/install/multicluster/>Install Multicluster</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Initial steps before installing Istio on multiple clusters." href=/v1.8/docs/setup/install/multicluster/before-you-begin/>Before you begin</a></li><li role=none><a role=treeitem title="Install an Istio mesh across multiple primary clusters." href=/v1.8/docs/setup/install/multicluster/multi-primary/>Install Multi-Primary</a></li><li role=none><a role=treeitem title="Install an Istio mesh across primary and remote clusters." href=/v1.8/docs/setup/install/multicluster/primary-remote/>Install Primary-Remote</a></li><li role=none><a role=treeitem title="Install an Istio mesh across multiple primary clusters on different networks." href=/v1.8/docs/setup/install/multicluster/multi-primary_multi-network/>Install Multi-Primary on different networks</a></li><li role=none><a role=treeitem title="Install an Istio mesh across primary and remote clusters on different networks." href=/v1.8/docs/setup/install/multicluster/primary-remote_multi-network/>Install Primary-Remote on different networks</a></li><li role=none><a role=treeitem title="Verify that Istio has been installed properly on multiple clusters." href=/v1.8/docs/setup/install/multicluster/verify/>Verify the installation</a></li></ul></li><li role=none><a role=treeitem title="Deploy Istio and connect a workload running within a virtual machine to it." href=/v1.8/docs/setup/install/virtual-machine/>Virtual Machine Installation</a></li></ul></li><li role=treeitem aria-label=Upgrade><button aria-hidden=true></button><a title="Upgrade, downgrade, and manage Istio accross multiple control plane revisions." href=/v1.8/docs/setup/upgrade/>Upgrade</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Upgrade Istio by first running a canary deployment of a new control plane." href=/v1.8/docs/setup/upgrade/canary/>Canary Upgrades</a></li><li role=none><a role=treeitem title="Upgrade or downgrade Istio in place." href=/v1.8/docs/setup/upgrade/in-place/>In-place Upgrades</a></li><li role=none><a role=treeitem title="Configuring and upgrading Istio with gateways." href=/v1.8/docs/setup/upgrade/gateways/>Managing Gateways with Multiple Revisions [experimental]</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=/v1.8/docs/setup/additional-setup/>More Guides</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Describes the built-in Istio installation configuration profiles." href=/v1.8/docs/setup/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=/v1.8/docs/setup/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=/v1.8/docs/setup/additional-setup/cni/>Install Istio with the Istio CNI plugin</a></li><li role=none><a role=treeitem title="Install an external control plane and remote cluster." href=/v1.8/docs/setup/additional-setup/external-controlplane/>Install Istio with an External Control Plane</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card73 title="How to do single specific targeted activities with the Istio system." aria-controls=card73-body><svg class="icon tasks"><use xlink:href="/v1.8/img/icons.svg#tasks"/></svg>Tasks</button><div class=body aria-labelledby=card73 role=region id=card73-body><ul role=tree aria-expanded=true aria-labelledby=card73><li role=treeitem aria-label="Traffic Management"><button aria-hidden=true></button><a title="Tasks that demonstrate Istio's traffic routing features." href=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/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." href=/v1.8/docs/tasks/traffic-management/ingress/secure-ingress/>Secure Gateways</a></li><li role=none><a role=treeitem title="Describes how to configure SNI passthrough for an ingress gateway." href=/v1.8/docs/tasks/traffic-management/ingress/ingress-sni-passthrough/>Ingress Gateway without TLS Termination</a></li><li role=none><a role=treeitem title="Describes how to configure a Kubernetes Ingress object to expose a service outside of the service mesh." href=/v1.8/docs/tasks/traffic-management/ingress/kubernetes-ingress/>Kubernetes Ingress</a></li><li role=none><a role=treeitem title="Describes how to configure the Kubernetes Service APIs with Istio." href=/v1.8/docs/tasks/traffic-management/ingress/service-apis/>Kubernetes Service APIs [Experimental]</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=/v1.8/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=/v1.8/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=/v1.8/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=/v1.8/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 using Secret Discovery Service." href=/v1.8/docs/tasks/traffic-management/egress/egress-gateway-tls-origination-sds/>Egress Gateways with TLS Origination (SDS)</a></li><li role=none><a role=treeitem title="Describes how to configure an Egress Gateway to perform TLS origination to external services using file mount certificates." href=/v1.8/docs/tasks/traffic-management/egress/egress-gateway-tls-origination/>Egress Gateways with TLS Origination (File Mount)</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=/v1.8/docs/tasks/traffic-management/egress/wildcard-egress-hosts/>Egress using Wildcard Hosts</a></li><li role=none><a role=treeitem title="Shows how to configure Istio for Kubernetes External Services." href=/v1.8/docs/tasks/traffic-management/egress/egress-kubernetes-services/>Kubernetes Services for Egress Traffic</a></li><li role=none><a role=treeitem title="Describes how to configure Istio to let applications use an external HTTPS proxy." href=/v1.8/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=/v1.8/docs/tasks/security/>Security</a><ul role=group aria-expanded=false><li role=treeitem aria-label="Certificate Management"><button aria-hidden=true></button><a title="Management of the certificates in Istio." href=/v1.8/docs/tasks/security/cert-management/>Certificate Management</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Shows how system administrators can configure Istio's CA with a root certificate, signing certificate and key." href=/v1.8/docs/tasks/security/cert-management/plugin-ca-cert/>Plug in CA Certificates</a></li><li role=none><a role=treeitem title="Shows how to provision and manage DNS certificates in Istio." href=/v1.8/docs/tasks/security/cert-management/dns-cert/>Istio DNS Certificate Management</a></li><li role=none><a role=treeitem title="Shows how to use a Custom Certificate Authority (that integrates with the Kubernetes CSR API) to provision Istio workload certificates." href=/v1.8/docs/tasks/security/cert-management/custom-ca-k8s/>Custom CA Integration using Kubernetes CSR [experimental]</a></li></ul></li><li role=treeitem aria-label=Authentication><button aria-hidden=true></button><a title="Controlling mutual TLS and end-user authentication for mesh services." href=/v1.8/docs/tasks/security/authentication/>Authentication</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=/v1.8/docs/tasks/security/authentication/authn-policy/>Authentication Policy</a></li><li role=none><a role=treeitem title="Shows you how to incrementally migrate your Istio services to mutual TLS." href=/v1.8/docs/tasks/security/authentication/mtls-migration/>Mutual TLS Migration</a></li></ul></li><li role=treeitem aria-label=Authorization><button aria-hidden=true></button><a title="Shows how to control access to Istio services." href=/v1.8/docs/tasks/security/authorization/>Authorization</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Shows how to set up access control for HTTP traffic." href=/v1.8/docs/tasks/security/authorization/authz-http/>Authorization for HTTP traffic</a></li><li role=none><a role=treeitem title="How to set up access control for TCP traffic." href=/v1.8/docs/tasks/security/authorization/authz-tcp/>Authorization for TCP traffic</a></li><li role=none><a role=treeitem title="How to set up access control with JWT in Istio." href=/v1.8/docs/tasks/security/authorization/authz-jwt/>Authorization with JWT</a></li><li role=none><a role=treeitem title="Shows how to set up access control to deny traffic explicitly." href=/v1.8/docs/tasks/security/authorization/authz-deny/>Authorization policies with a deny action</a></li><li role=none><a role=treeitem title="How to set up access control on an ingress gateway." href=/v1.8/docs/tasks/security/authorization/authz-ingress/>Authorization on Ingress Gateway</a></li><li role=none><a role=treeitem title="Shows how to migrate from one trust domain to another without changing authorization policy." href=/v1.8/docs/tasks/security/authorization/authz-td-migration/>Authorization Policy Trust Domain Migration</a></li></ul></li></ul></li><li role=treeitem aria-label=Observability><button aria-hidden=true></button><a title="Demonstrates how to collect telemetry information from the mesh." href=/v1.8/docs/tasks/observability/>Observability</a><ul role=group aria-expanded=false><li role=treeitem aria-label=Metrics><button aria-hidden=true></button><a title="Demonstrates the collection and querying of metrics within Istio." href=/v1.8/docs/tasks/observability/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 metrics for TCP services." href=/v1.8/docs/tasks/observability/metrics/tcp-metrics/>Collecting Metrics for TCP Services</a></li><li role=none><a role=treeitem title="This task shows you how to customize the Istio metrics." href=/v1.8/docs/tasks/observability/metrics/customize-metrics/>Customizing Istio Metrics</a></li><li role=none><a role=treeitem title="This task shows you how to improve telemetry by grouping requests and responses by their type." href=/v1.8/docs/tasks/observability/metrics/classify-metrics/>Classifying Metrics Based on Request or Response (Experimental)</a></li><li role=none><a role=treeitem title="This task shows you how to query for Istio Metrics using Prometheus." href=/v1.8/docs/tasks/observability/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=/v1.8/docs/tasks/observability/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 collection of logs within Istio." href=/v1.8/docs/tasks/observability/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 Envoy proxies to print access logs to their standard output." href=/v1.8/docs/tasks/observability/logs/access-log/>Getting Envoy's Access Logs</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=/v1.8/docs/tasks/observability/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=/v1.8/docs/tasks/observability/distributed-tracing/overview/>Overview</a></li><li role=none><a role=treeitem title="Learn how to configure the proxies to send tracing requests to Zipkin." href=/v1.8/docs/tasks/observability/distributed-tracing/zipkin/>Zipkin</a></li><li role=none><a role=treeitem title="Learn how to configure the proxies to send tracing requests to Jaeger." href=/v1.8/docs/tasks/observability/distributed-tracing/jaeger/>Jaeger</a></li><li role=none><a role=treeitem title="How to configure the proxies to send tracing requests to Lightstep." href=/v1.8/docs/tasks/observability/distributed-tracing/lightstep/>Lightstep</a></li><li role=none><a role=treeitem title="How to configure tracing options (beta/development)." href=/v1.8/docs/tasks/observability/distributed-tracing/configurability/>Configurability (Beta/Development)</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=/v1.8/docs/tasks/observability/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=/v1.8/docs/tasks/observability/gateways/>Remotely Accessing Telemetry Addons</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card94 title="A variety of fully working example uses for Istio that you can experiment with." aria-controls=card94-body><svg class="icon examples"><use xlink:href="/v1.8/img/icons.svg#examples"/></svg>Examples</button><div class=body aria-labelledby=card94 role=region id=card94-body><ul role=tree aria-expanded=true aria-labelledby=card94><li role=none><a role=treeitem title="Deploys a sample application composed of four separate microservices used to demonstrate various Istio features." href=/v1.8/docs/examples/bookinfo/>Bookinfo Application</a></li><li role=treeitem aria-label="Virtual Machines"><button aria-hidden=true></button><a title="Examples that add workloads running on virtual machines to an Istio mesh." href=/v1.8/docs/examples/virtual-machines/>Virtual Machines</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Learn how to add a service running on a virtual machine to your single-network Istio mesh." href=/v1.8/docs/examples/virtual-machines/single-network/>Example Application using Virtual Machines in a Single Network Mesh</a></li><li role=none><a role=treeitem title="Learn how to add a service running on a virtual machine to your multi-network Istio mesh." href=/v1.8/docs/examples/virtual-machines/multi-network/>Virtual Machines in Multi-Network Meshes</a></li><li role=none><a role=treeitem title="Run the Bookinfo application with a MySQL service running on a virtual machine within your mesh." href=/v1.8/docs/examples/virtual-machines/bookinfo/>Bookinfo with a Virtual Machine</a></li></ul></li><li role=treeitem aria-label="Learn Microservices using Kubernetes and Istio"><button aria-hidden=true></button><a title="This modular tutorial provides new users with hands-on experience using Istio for common microservices scenarios, one step at a time." href=/v1.8/docs/examples/microservices-istio/>Learn Microservices using Kubernetes and Istio</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/prereq/>Prerequisites</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/setup-kubernetes-cluster/>Setup a Kubernetes Cluster</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/setup-local-computer/>Setup a Local Computer</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/single/>Run a Microservice Locally</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/package-service/>Run ratings in Docker</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/bookinfo-kubernetes/>Run Bookinfo with Kubernetes</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/production-testing/>Test in production</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/add-new-microservice-version/>Add a new version of reviews</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/add-istio/>Enable Istio on productpage</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/enable-istio-all-microservices/>Enable Istio on all the microservices</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/istio-ingress-gateway/>Configure Istio Ingress Gateway</a></li><li role=none><a role=treeitem href=/v1.8/docs/examples/microservices-istio/logs-istio/>Monitoring with Istio</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card118 title="Concepts, tools, and techniques to deploy and manage an Istio mesh." aria-controls=card118-body><svg class="icon guide"><use xlink:href="/v1.8/img/icons.svg#guide"/></svg>Operations</button><div class="body default" aria-labelledby=card118 role=region id=card118-body><ul role=tree aria-expanded=true aria-labelledby=card118><li role=treeitem aria-label=Deployment><button aria-hidden=true></button><a title="Requirements, concepts, and considerations for setting up an Istio deployment." href=/v1.8/docs/ops/deployment/>Deployment</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Describes Istio's high-level architecture and design goals." href=/v1.8/docs/ops/deployment/architecture/>Architecture</a></li><li role=none><a role=treeitem title="Describes the options and considerations when configuring your Istio deployment." href=/v1.8/docs/ops/deployment/deployment-models/>Deployment Models</a></li><li role=none><a role=treeitem title="Istio performance and scalability summary." href=/v1.8/docs/ops/deployment/performance-and-scalability/>Performance and Scalability</a></li><li role=none><a role=treeitem title="Requirements of applications deployed in an Istio-enabled cluster." href=/v1.8/docs/ops/deployment/requirements/>Application Requirements</a></li></ul></li><li role=treeitem aria-label=Configuration><button aria-hidden=true></button><a title="Advanced concepts and features for configuring a running Istio mesh." href=/v1.8/docs/ops/configuration/>Configuration</a><ul role=group aria-expanded=false><li role=treeitem aria-label="Mesh Configuration"><button aria-hidden=true></button><a title="Helps you manage the global mesh configuration." href=/v1.8/docs/ops/configuration/mesh/>Mesh Configuration</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=/v1.8/docs/ops/configuration/mesh/webhook/>Dynamic Admission Webhooks Overview</a></li><li role=none><a role=treeitem title="Describes how to wait to apply mesh configuration until a resource reaches a given status or readiness." href=/v1.8/docs/ops/configuration/mesh/config-resource-ready/>Wait for Resource Status to Apply Configuration</a></li><li role=none><a role=treeitem title="Describes Istio's use of Kubernetes webhooks for automatic sidecar injection." href=/v1.8/docs/ops/configuration/mesh/injection-concepts/>Automatic Sidecar Injection</a></li><li role=none><a role=treeitem title="Shows how to do health checking for Istio services." href=/v1.8/docs/ops/configuration/mesh/app-health-check/>Health Checking of Istio Services</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=/v1.8/docs/ops/configuration/traffic-management/>Traffic Management</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Information on how to specify protocols." href=/v1.8/docs/ops/configuration/traffic-management/protocol-selection/>Protocol Selection</a></li><li role=none><a role=treeitem title="Information on how to enable and understand Locality Load Balancing." href=/v1.8/docs/ops/configuration/traffic-management/locality-load-balancing/>Locality Load Balancing</a></li><li role=none><a role=treeitem title="How to configure TLS settings to secure network traffic." href=/v1.8/docs/ops/configuration/traffic-management/tls-configuration/>TLS Configuration</a></li><li role=none><a role=treeitem title="How to configure gateway network topology." href=/v1.8/docs/ops/configuration/traffic-management/network-topologies/>Configuring Gateway Network Topology [experimental]</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=/v1.8/docs/ops/configuration/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=/v1.8/docs/ops/configuration/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=/v1.8/docs/ops/configuration/security/root-transition/>Extending Self-Signed Certificate Lifetime</a></li></ul></li><li role=treeitem aria-label=Observability><button aria-hidden=true></button><a title="Helps you manage telemetry collection and visualization in a running mesh." href=/v1.8/docs/ops/configuration/telemetry/>Observability</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Fine-grained control of Envoy statistics." href=/v1.8/docs/ops/configuration/telemetry/envoy-stats/>Envoy Statistics</a></li><li role=none><a role=treeitem title="Configure Prometheus to monitor multicluster Istio." href=/v1.8/docs/ops/configuration/telemetry/monitoring-multicluster-prometheus/>Monitoring Multicluster Istio with Prometheus</a></li></ul></li></ul></li><li role=treeitem aria-label="Best Practices"><button aria-hidden=true></button><a title="Best practices for setting up and managing an Istio service mesh." href=/v1.8/docs/ops/best-practices/>Best Practices</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="General best practices when setting up an Istio service mesh." href=/v1.8/docs/ops/best-practices/deployment/>Deployment Best Practices</a></li><li role=none><a role=treeitem title="Configuration best practices to avoid networking or traffic management issues." href=/v1.8/docs/ops/best-practices/traffic-management/>Traffic Management Best Practices</a></li><li role=none><a role=treeitem title="Best practices for securing applications using Istio." href=/v1.8/docs/ops/best-practices/security/>Security Best Practices</a></li><li role=none><a role=treeitem title="Best practices for observing applications using Istio." href=/v1.8/docs/ops/best-practices/observability/>Observability Best Practices</a></li></ul></li><li role=treeitem aria-label="Common Problems"><button aria-hidden=true></button><a title="Describes how to identify and resolve common problems in Istio." href=/v1.8/docs/ops/common-problems/>Common Problems</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Techniques to address common Istio traffic management and network problems." href=/v1.8/docs/ops/common-problems/network-issues/>Traffic Management Problems</a></li><li role=none><a role=treeitem title="Techniques to address common Istio authentication, authorization, and general security-related problems." href=/v1.8/docs/ops/common-problems/security-issues/>Security Problems</a></li><li role=none><a role=treeitem title="Dealing with telemetry collection issues." href=/v1.8/docs/ops/common-problems/observability-issues/>Observability 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=/v1.8/docs/ops/common-problems/injection/>Sidecar Injection Problems</a></li><li role=none><a role=treeitem title="Describes how to resolve configuration validation problems." href=/v1.8/docs/ops/common-problems/validation/>Configuration Validation Problems</a></li></ul></li><li role=treeitem aria-label="Diagnostic Tools"><button class=show aria-hidden=true></button><a title="Tools and techniques to help troubleshoot an Istio mesh." href=/v1.8/docs/ops/diagnostic-tools/>Diagnostic Tools</a><ul role=group aria-expanded=true 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=/v1.8/docs/ops/diagnostic-tools/istioctl/>Using the Istioctl Command-line Tool</a></li><li role=none><span role=treeitem class=current title="Describes tools and techniques to diagnose Envoy configuration issues related to traffic management.">Debugging Envoy and Istiod</span></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=/v1.8/docs/ops/diagnostic-tools/istioctl-describe/>Understand your Mesh with Istioctl Describe</a></li><li role=none><a role=treeitem title="Shows you how to use istioctl analyze to identify potential issues with your configuration." href=/v1.8/docs/ops/diagnostic-tools/istioctl-analyze/>Diagnose your Configuration with Istioctl Analyze</a></li><li role=none><a role=treeitem title="Describes how to use ControlZ to get insight into a running istiod component." href=/v1.8/docs/ops/diagnostic-tools/controlz/>Istiod Introspection</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=/v1.8/docs/ops/diagnostic-tools/component-logging/>Component Logging</a></li></ul></li><li role=treeitem aria-label=Integrations><button aria-hidden=true></button><a title="Other softwares that Istio can integrate with to provide additional functionality." href=/v1.8/docs/ops/integrations/>Integrations</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Information on how to integrate with cert-manager." href=/v1.8/docs/ops/integrations/certmanager/>cert-manager</a></li><li role=none><a role=treeitem title="Information on how to integrate with Grafana to set up Istio dashboards." href=/v1.8/docs/ops/integrations/grafana/>Grafana</a></li><li role=none><a role=treeitem title="How to integrate with Jaeger." href=/v1.8/docs/ops/integrations/jaeger/>Jaeger</a></li><li role=none><a role=treeitem title="Information on how to integrate with Kiali." href=/v1.8/docs/ops/integrations/kiali/>Kiali</a></li><li role=none><a role=treeitem title="How to integrate with Prometheus." href=/v1.8/docs/ops/integrations/prometheus/>Prometheus</a></li><li role=none><a role=treeitem title="How to integrate with Zipkin." href=/v1.8/docs/ops/integrations/zipkin/>Zipkin</a></li></ul></li></ul></div></div><div class=card><button class="header dynamic" id=card169 title="Detailed authoritative reference material such as command-line options, configuration options, and API calling parameters." aria-controls=card169-body><svg class="icon reference"><use xlink:href="/v1.8/img/icons.svg#reference"/></svg>Reference</button><div class=body aria-labelledby=card169 role=region id=card169-body><ul role=tree aria-expanded=true aria-labelledby=card169><li role=treeitem aria-label=Configuration><button aria-hidden=true></button><a title="Detailed information on configuration options." href=/v1.8/docs/reference/config/>Configuration</a><ul role=group aria-expanded=false><li role=none><a role=treeitem title="Configuration affecting Istio control plane installation version and shape." href=/v1.8/docs/reference/config/istio.operator.v1alpha1/>IstioOperator Options</a></li><li role=none><a role=treeitem title="Configuration affecting the service mesh as a whole." href=/v1.8/docs/reference/config/istio.mesh.v1alpha1/>Global Mesh Options</a></li><li role=none><a role=treeitem title="Describes the structure of messages generated by Istio analyzers." href=/v1.8/docs/reference/config/istio.analysis.v1alpha1/>Analysis Messages</a></li><li role=none><a role=treeitem title="Describes the role of the `status` field in configuration workflow." href=/v1.8/docs/reference/config/config-status/>Configuration Status Field</a></li><li role=treeitem aria-label="Proxy Extensions"><button aria-hidden=true></button><a title="Describes how to configure Istio proxy extensions." href=/v1.8/docs/reference/config/proxy_extensions/>Proxy Extensions</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Configuration for Metadata Exchange Filter." href=/v1.8/docs/reference/config/proxy_extensions/metadata_exchange/>Metadata Exchange Config</a></li><li role=none><a role=treeitem title="Configuration for Stackdriver filter." href=/v1.8/docs/reference/config/proxy_extensions/stackdriver/>Stackdriver Config</a></li><li role=none><a role=treeitem title="Configuration for Attribute Generation plugin." href=/v1.8/docs/reference/config/proxy_extensions/attributegen/>AttributeGen Config</a></li><li role=none><a role=treeitem title="Configuration for AccessLogPolicy Filter." href=/v1.8/docs/reference/config/proxy_extensions/accesslogpolicy/>AccessLogPolicy Config</a></li><li role=none><a role=treeitem title="Configuration for Stats Filter." href=/v1.8/docs/reference/config/proxy_extensions/stats/>Stats Config</a></li><li role=none><a role=treeitem title="How to enable telemetry generation with the Wasm runtime (experimental)." href=/v1.8/docs/reference/config/proxy_extensions/wasm_telemetry/>Wasm-based Telemetry (Experimental)</a></li></ul></li><li role=treeitem aria-label="Traffic Management"><button aria-hidden=true></button><a title="Describes how to configure HTTP/TCP routing features." href=/v1.8/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=/v1.8/docs/reference/config/networking/destination-rule/>Destination Rule</a></li><li role=none><a role=treeitem title="Customizing Envoy configuration generated by Istio." href=/v1.8/docs/reference/config/networking/envoy-filter/>Envoy Filter</a></li><li role=none><a role=treeitem title="Configuration affecting edge load balancer." href=/v1.8/docs/reference/config/networking/gateway/>Gateway</a></li><li role=none><a role=treeitem title="Configuration affecting service registry." href=/v1.8/docs/reference/config/networking/service-entry/>Service Entry</a></li><li role=none><a role=treeitem title="Configuration affecting network reachability of a sidecar." href=/v1.8/docs/reference/config/networking/sidecar/>Sidecar</a></li><li role=none><a role=treeitem title="Describes a collection of workload instances." href=/v1.8/docs/reference/config/networking/workload-group/>Workload Group</a></li><li role=none><a role=treeitem title="Configuration affecting VMs onboarded into the mesh." href=/v1.8/docs/reference/config/networking/workload-entry/>Workload Entry</a></li><li role=none><a role=treeitem title="Configuration affecting label/content routing, sni routing, etc." href=/v1.8/docs/reference/config/networking/virtual-service/>Virtual Service</a></li></ul></li><li role=treeitem aria-label=Security><button aria-hidden=true></button><a title="Describes how to configure Istio's security features." href=/v1.8/docs/reference/config/security/>Security</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Configuration to validate JWT." href=/v1.8/docs/reference/config/security/jwt/>JWTRule</a></li><li role=none><a role=treeitem title="Peer authentication configuration for workloads." href=/v1.8/docs/reference/config/security/peer_authentication/>PeerAuthentication</a></li><li role=none><a role=treeitem title="Request authentication configuration for workloads." href=/v1.8/docs/reference/config/security/request_authentication/>RequestAuthentication</a></li><li role=none><a role=treeitem title="Configuration for access control on workloads." href=/v1.8/docs/reference/config/security/authorization-policy/>Authorization Policy</a></li><li role=none><a role=treeitem title="Describes the supported conditions in authorization policies." href=/v1.8/docs/reference/config/security/conditions/>Authorization Policy Conditions</a></li></ul></li><li role=treeitem aria-label="Common Types"><button aria-hidden=true></button><a title="Describes common types in Istio API." href=/v1.8/docs/reference/config/type/>Common Types</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Definition of a workload selector." href=/v1.8/docs/reference/config/type/workload-selector/>Workload Selector</a></li></ul></li><li role=none><a role=treeitem title="Istio standard metrics exported by Istio telemetry." href=/v1.8/docs/reference/config/metrics/>Istio Standard Metrics</a></li><li role=none><a role=treeitem title="Resource annotations used by Istio." href=/v1.8/docs/reference/config/annotations/>Resource Annotations</a></li><li role=treeitem aria-label="Configuration Analysis Messages"><button aria-hidden=true></button><a title="Documents the individual error and warning messages produced during configuration analysis." href=/v1.8/docs/reference/config/analysis/>Configuration Analysis Messages</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0113/>MTLSPolicyConflict</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0109/>ConflictingMeshGatewayVirtualServiceHosts</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0110/>ConflictingSidecarWorkloadSelectors</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0116/>DeploymentAssociatedToMultipleServices</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0117/>DeploymentRequiresServiceAssociated</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0002/>Deprecated</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0104/>GatewayPortNotOnWorkload</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0001/>InternalError</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0125/>InvalidAnnotation</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0122/>InvalidRegexp</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0105/>IstioProxyImageMismatch</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0119/>JwtFailureDueToInvalidServicePortPrefix</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0107/>MisplacedAnnotation</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0108/>UnknownAnnotation</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0111/>MultipleSidecarsWithoutWorkloadSelectors</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0123/>NamespaceMultipleInjectionLabels</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0102/>NamespaceNotInjected</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0127/>NoMatchingWorkloadsFound</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0128/>NoServerCertificateVerificationDestinationLevel</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0129/>NoServerCertificateVerificationPortLevel</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/message-format/>Analyzer Message Format</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0131/>VirtualServiceIneffectiveMatch</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0118/>PortNameIsNotUnderNamingConvention</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0101/>ReferencedResourceNotFound</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0106/>SchemaValidationError</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0130/>VirtualServiceUnreachableRule</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0103/>PodMissingProxy</a></li><li role=none><a role=treeitem href=/v1.8/docs/reference/config/analysis/ist0112/>VirtualServiceDestinationPortSelectorRequired</a></li></ul></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=/v1.8/docs/reference/commands/>Commands</a><ul role=group aria-expanded=false class=leaf-section><li role=none><a role=treeitem title="Istio control interface." href=/v1.8/docs/reference/commands/istioctl/>istioctl</a></li><li role=none><a role=treeitem title="Istio Pilot." href=/v1.8/docs/reference/commands/pilot-discovery/>pilot-discovery</a></li><li role=none><a role=treeitem title="The Istio operator." href=/v1.8/docs/reference/commands/operator/>operator</a></li><li role=none><a role=treeitem title="Istio Pilot agent." href=/v1.8/docs/reference/commands/pilot-agent/>pilot-agent</a></li></ul></li><li role=none><a role=treeitem title="A glossary of common Istio terms." href=/v1.8/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 pull"><use xlink:href="/v1.8/img/icons.svg#pull"/></svg></button><nav aria-label=Breadcrumb><ol><li><a href=/v1.8/ title="Connect, secure, control, and observe services.">Istio</a></li><li><a href=/v1.8/docs/ title="Learn how to deploy, use, and operate Istio.">Docs</a></li><li><a href=/v1.8/docs/ops/ title="Concepts, tools, and techniques to deploy and manage an Istio mesh.">Operations</a></li><li><a href=/v1.8/docs/ops/diagnostic-tools/ title="Tools and techniques to help troubleshoot an Istio mesh.">Diagnostic Tools</a></li><li>Debugging Envoy and Istiod</li></ol></nav><article aria-labelledby=title><div class=title-area><div style=width:100%><h1 id=title>Debugging Envoy and Istiod</h1><p class=byline><span title="1782 words"><svg class="icon clock"><use xlink:href="/v1.8/img/icons.svg#clock"/></svg><span> </span>9 minute read</span>
|
||
<span> </span>
|
||
<span><a href=https://github.com/istio/istio.io/tree/master/README.md#testing-document-content title="No automated test is available for this page. Click for details or to help create one."><svg class="icon cancel-grey"><use xlink:href="/v1.8/img/icons.svg#cancel-grey"/></svg><span> </span>
|
||
page test</a></span></p></div></div><nav class=toc-inlined aria-label="Table of Contents"><div><hr><ol><li role=none aria-label="Get an overview of your mesh"><a href=#get-an-overview-of-your-mesh>Get an overview of your mesh</a><li role=none aria-label="Retrieve diffs between Envoy and Istiod"><a href=#retrieve-diffs-between-envoy-and-istiod>Retrieve diffs between Envoy and Istiod</a><li role=none aria-label="Deep dive into Envoy configuration"><a href=#deep-dive-into-envoy-configuration>Deep dive into Envoy configuration</a><li role=none aria-label="Inspecting bootstrap configuration"><a href=#inspecting-bootstrap-configuration>Inspecting bootstrap configuration</a><li role=none aria-label="Verifying connectivity to Istiod"><a href=#verifying-connectivity-to-istiod>Verifying connectivity to Istiod</a><li role=none aria-label="What Envoy version is Istio using?"><a href=#what-envoy-version-is-istio-using>What Envoy version is Istio using?</a><li role=none aria-label="See also"><a href=#see-also>See also</a></li></ol><hr></div></nav><p>Istio provides two very valuable commands to help diagnose traffic management configuration problems,
|
||
the <a href=/v1.8/docs/reference/commands/istioctl/#istioctl-proxy-status><code>proxy-status</code></a>
|
||
and <a href=/v1.8/docs/reference/commands/istioctl/#istioctl-proxy-config><code>proxy-config</code></a> commands. The <code>proxy-status</code> command
|
||
allows you to get an overview of your mesh and identify the proxy causing the problem. Then <code>proxy-config</code> can be used
|
||
to inspect Envoy configuration and diagnose the issue.</p><p>If you want to try the commands described below, you can either:</p><ul><li>Have a Kubernetes cluster with Istio and Bookinfo installed (as described in
|
||
<a href=/v1.8/docs/setup/getting-started/>installation steps</a> and
|
||
<a href=/v1.8/docs/examples/bookinfo/#deploying-the-application>Bookinfo installation steps</a>).</li></ul><p>OR</p><ul><li>Use similar commands against your own application running in a Kubernetes cluster.</li></ul><h2 id=get-an-overview-of-your-mesh>Get an overview of your mesh</h2><p>The <code>proxy-status</code> command allows you to get an overview of your mesh. If you suspect one of your sidecars isn’t
|
||
receiving configuration or is out of sync then <code>proxy-status</code> will tell you this.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl proxy-status
|
||
NAME CDS LDS EDS RDS ISTIOD VERSION
|
||
details-v1-558b8b4b76-qzqsg.default SYNCED SYNCED SYNCED SYNCED istiod-6cf8d4f9cb-wm7x6 1.7.0
|
||
istio-ingressgateway-66c994c45c-cmb7x.istio-system SYNCED SYNCED SYNCED NOT SENT istiod-6cf8d4f9cb-wm7x6 1.7.0
|
||
productpage-v1-6987489c74-nc7tj.default SYNCED SYNCED SYNCED SYNCED istiod-6cf8d4f9cb-wm7x6 1.7.0
|
||
prometheus-7bdc59c94d-hcp59.istio-system SYNCED SYNCED SYNCED SYNCED istiod-6cf8d4f9cb-wm7x6 1.7.0
|
||
ratings-v1-7dc98c7588-5m6xj.default SYNCED SYNCED SYNCED SYNCED istiod-6cf8d4f9cb-wm7x6 1.7.0
|
||
reviews-v1-7f99cc4496-rtsqn.default SYNCED SYNCED SYNCED SYNCED istiod-6cf8d4f9cb-wm7x6 1.7.0
|
||
reviews-v2-7d79d5bd5d-tj6kf.default SYNCED SYNCED SYNCED SYNCED istiod-6cf8d4f9cb-wm7x6 1.7.0
|
||
reviews-v3-7dbcdcbc56-t8wrx.default SYNCED SYNCED SYNCED SYNCED istiod-6cf8d4f9cb-wm7x6 1.7.0
|
||
</code></pre><p>If a proxy is missing from this list it means that it is not currently connected to a Istiod instance so will not be
|
||
receiving any configuration.</p><ul><li><code>SYNCED</code> means that Envoy has acknowledged the last configuration <span class=term data-title=Istiod data-body='<p>The Istiod component is the consolidated control plane binary that encapsulates the functions of Pilot, Galley, Citadel, and the sidecar injector.</p>
|
||
|
||
<p><a href="/blog/2020/istiod/">Learn more about Istiod</a>.</p>'>Istiod</span> has sent to it.</li><li><code>NOT SENT</code> means that Istiod hasn’t sent anything to Envoy. This usually is because Istiod has nothing to send.</li><li><code>STALE</code> means that Istiod has sent an update to Envoy but has not received an acknowledgement. This usually indicates
|
||
a networking issue between Envoy and Istiod or a bug with Istio itself.</li></ul><h2 id=retrieve-diffs-between-envoy-and-istiod>Retrieve diffs between Envoy and Istiod</h2><p>The <code>proxy-status</code> command can also be used to retrieve a diff between the configuration Envoy has loaded and the
|
||
configuration Istiod would send, by providing a proxy ID. This can help you determine exactly what is out of sync and
|
||
where the issue may lie.</p><pre><code class=language-bash data-expandlinks=true data-outputis=json data-repo=istio>$ istioctl proxy-status details-v1-6dcc6fbb9d-wsjz4.default
|
||
--- Istiod Clusters
|
||
+++ Envoy Clusters
|
||
@@ -374,36 +374,14 @@
|
||
"edsClusterConfig": {
|
||
"edsConfig": {
|
||
"ads": {
|
||
|
||
}
|
||
},
|
||
"serviceName": "outbound|443||public-cr0bdc785ce3f14722918080a97e1f26be-alb1.kube-system.svc.cluster.local"
|
||
- },
|
||
- "connectTimeout": "1.000s",
|
||
- "circuitBreakers": {
|
||
- "thresholds": [
|
||
- {
|
||
-
|
||
- }
|
||
- ]
|
||
- }
|
||
- }
|
||
- },
|
||
- {
|
||
- "cluster": {
|
||
- "name": "outbound|53||kube-dns.kube-system.svc.cluster.local",
|
||
- "type": "EDS",
|
||
- "edsClusterConfig": {
|
||
- "edsConfig": {
|
||
- "ads": {
|
||
-
|
||
- }
|
||
- },
|
||
- "serviceName": "outbound|53||kube-dns.kube-system.svc.cluster.local"
|
||
},
|
||
"connectTimeout": "1.000s",
|
||
"circuitBreakers": {
|
||
"thresholds": [
|
||
{
|
||
|
||
}
|
||
|
||
Listeners Match
|
||
Routes Match (RDS last loaded at Tue, 04 Aug 2020 11:52:54 IST)
|
||
</code></pre><p>Here you can see that the listeners and routes match but the clusters are out of sync.</p><h2 id=deep-dive-into-envoy-configuration>Deep dive into Envoy configuration</h2><p>The <code>proxy-config</code> command can be used to see how a given Envoy instance is configured. This can then be used to
|
||
pinpoint any issues you are unable to detect by just looking through your Istio configuration and custom resources.
|
||
To get a basic summary of clusters, listeners or routes for a given pod use the command as follows (changing clusters
|
||
for listeners or routes when required):</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl proxy-config cluster -n istio-system istio-ingressgateway-7d6874b48f-qxhn5
|
||
SERVICE FQDN PORT SUBSET DIRECTION TYPE DESTINATION RULE
|
||
BlackHoleCluster - - - STATIC
|
||
agent - - - STATIC
|
||
details.default.svc.cluster.local 9080 - outbound EDS details.default
|
||
istio-ingressgateway.istio-system.svc.cluster.local 80 - outbound EDS
|
||
istio-ingressgateway.istio-system.svc.cluster.local 443 - outbound EDS
|
||
istio-ingressgateway.istio-system.svc.cluster.local 15021 - outbound EDS
|
||
istio-ingressgateway.istio-system.svc.cluster.local 15443 - outbound EDS
|
||
istiod.istio-system.svc.cluster.local 443 - outbound EDS
|
||
istiod.istio-system.svc.cluster.local 853 - outbound EDS
|
||
istiod.istio-system.svc.cluster.local 15010 - outbound EDS
|
||
istiod.istio-system.svc.cluster.local 15012 - outbound EDS
|
||
istiod.istio-system.svc.cluster.local 15014 - outbound EDS
|
||
kube-dns.kube-system.svc.cluster.local 53 - outbound EDS
|
||
kube-dns.kube-system.svc.cluster.local 9153 - outbound EDS
|
||
kubernetes.default.svc.cluster.local 443 - outbound EDS
|
||
...
|
||
productpage.default.svc.cluster.local 9080 - outbound EDS
|
||
prometheus_stats - - - STATIC
|
||
ratings.default.svc.cluster.local 9080 - outbound EDS
|
||
reviews.default.svc.cluster.local 9080 - outbound EDS
|
||
sds-grpc - - - STATIC
|
||
xds-grpc - - - STRICT_DNS
|
||
zipkin - - - STRICT_DNS
|
||
</code></pre><p>In order to debug Envoy you need to understand Envoy clusters/listeners/routes/endpoints and how they all interact.
|
||
We will use the <code>proxy-config</code> command with the <code>-o json</code> and filtering flags to follow Envoy as it determines where
|
||
to send a request from the <code>productpage</code> pod to the <code>reviews</code> pod at <code>reviews:9080</code>.</p><ol><li><p>If you query the listener summary on a pod you will notice Istio generates the following listeners:</p><ul><li>A listener on <code>0.0.0.0:15006</code> that receives all inbound traffic to the pod and a listener on <code>0.0.0.0:15001</code> that receives all outbound traffic to the pod, then hands the request over to a virtual listener.</li><li>A virtual listener per service IP, per each non-HTTP for outbound TCP/HTTPS traffic.</li><li>A virtual listener on the pod IP for each exposed port for inbound traffic.</li><li>A virtual listener on <code>0.0.0.0</code> per each HTTP port for outbound HTTP traffic.</li></ul><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl proxy-config listeners productpage-v1-6c886ff494-7vxhs
|
||
ADDRESS PORT MATCH DESTINATION
|
||
10.96.0.10 53 ALL Cluster: outbound|53||kube-dns.kube-system.svc.cluster.local
|
||
0.0.0.0 80 App: HTTP Route: 80
|
||
0.0.0.0 80 ALL PassthroughCluster
|
||
10.100.93.102 443 ALL Cluster: outbound|443||istiod.istio-system.svc.cluster.local
|
||
10.111.121.13 443 ALL Cluster: outbound|443||istio-ingressgateway.istio-system.svc.cluster.local
|
||
10.96.0.1 443 ALL Cluster: outbound|443||kubernetes.default.svc.cluster.local
|
||
10.100.93.102 853 App: HTTP Route: istiod.istio-system.svc.cluster.local:853
|
||
10.100.93.102 853 ALL Cluster: outbound|853||istiod.istio-system.svc.cluster.local
|
||
0.0.0.0 9080 App: HTTP Route: 9080
|
||
0.0.0.0 9080 ALL PassthroughCluster
|
||
0.0.0.0 9090 App: HTTP Route: 9090
|
||
0.0.0.0 9090 ALL PassthroughCluster
|
||
10.96.0.10 9153 App: HTTP Route: kube-dns.kube-system.svc.cluster.local:9153
|
||
10.96.0.10 9153 ALL Cluster: outbound|9153||kube-dns.kube-system.svc.cluster.local
|
||
0.0.0.0 15001 ALL PassthroughCluster
|
||
0.0.0.0 15006 Addr: 10.244.0.22/32:15021 inbound|15021|mgmt-15021|mgmtCluster
|
||
0.0.0.0 15006 Addr: 10.244.0.22/32:9080 Inline Route: /*
|
||
0.0.0.0 15006 Trans: tls; App: HTTP TLS; Addr: 0.0.0.0/0 Inline Route: /*
|
||
0.0.0.0 15006 App: HTTP; Addr: 0.0.0.0/0 Inline Route: /*
|
||
0.0.0.0 15006 App: Istio HTTP Plain; Addr: 10.244.0.22/32:9080 Inline Route: /*
|
||
0.0.0.0 15006 Addr: 0.0.0.0/0 InboundPassthroughClusterIpv4
|
||
0.0.0.0 15006 Trans: tls; App: TCP TLS; Addr: 0.0.0.0/0 InboundPassthroughClusterIpv4
|
||
0.0.0.0 15010 App: HTTP Route: 15010
|
||
0.0.0.0 15010 ALL PassthroughCluster
|
||
10.100.93.102 15012 ALL Cluster: outbound|15012||istiod.istio-system.svc.cluster.local
|
||
0.0.0.0 15014 App: HTTP Route: 15014
|
||
0.0.0.0 15014 ALL PassthroughCluster
|
||
0.0.0.0 15021 ALL Inline Route: /healthz/ready*
|
||
10.111.121.13 15021 App: HTTP Route: istio-ingressgateway.istio-system.svc.cluster.local:15021
|
||
10.111.121.13 15021 ALL Cluster: outbound|15021||istio-ingressgateway.istio-system.svc.cluster.local
|
||
0.0.0.0 15090 ALL Inline Route: /stats/prometheus*
|
||
10.111.121.13 15443 ALL Cluster: outbound|15443||istio-ingressgateway.istio-system.svc.cluster.local
|
||
</code></pre></li><li><p>From the above summary you can see that every sidecar has a listener bound to <code>0.0.0.0:15006</code> which is where IP tables routes all inbound pod traffic to and a listener bound to <code>0.0.0.0:15001</code> which is where IP tables routes all outbound pod traffic to. The <code>0.0.0.0:15001</code> listener hands the request over to the virtual listener that best matches the original destination of the request, if it can find a matching one. Otherwise, it sends the request to the <code>PassthroughCluster</code> which connects to the destination directly.</p><pre><code class=language-bash data-expandlinks=true data-outputis=json data-repo=istio>$ istioctl proxy-config listeners productpage-v1-6c886ff494-7vxhs --port 15001 -o json
|
||
[
|
||
{
|
||
"name": "virtualOutbound",
|
||
"address": {
|
||
"socketAddress": {
|
||
"address": "0.0.0.0",
|
||
"portValue": 15001
|
||
}
|
||
},
|
||
"filterChains": [
|
||
{
|
||
"filters": [
|
||
{
|
||
"name": "istio.stats",
|
||
"typedConfig": {
|
||
"@type": "type.googleapis.com/udpa.type.v1.TypedStruct",
|
||
"typeUrl": "type.googleapis.com/envoy.extensions.filters.network.wasm.v3.Wasm",
|
||
"value": {
|
||
"config": {
|
||
"configuration": "{\n \"debug\": \"false\",\n \"stat_prefix\": \"istio\"\n}\n",
|
||
"root_id": "stats_outbound",
|
||
"vm_config": {
|
||
"code": {
|
||
"local": {
|
||
"inline_string": "envoy.wasm.stats"
|
||
}
|
||
},
|
||
"runtime": "envoy.wasm.runtime.null",
|
||
"vm_id": "tcp_stats_outbound"
|
||
}
|
||
}
|
||
}
|
||
}
|
||
},
|
||
{
|
||
"name": "envoy.tcp_proxy",
|
||
"typedConfig": {
|
||
"@type": "type.googleapis.com/envoy.config.filter.network.tcp_proxy.v2.TcpProxy",
|
||
"statPrefix": "PassthroughCluster",
|
||
"cluster": "PassthroughCluster"
|
||
}
|
||
}
|
||
],
|
||
"name": "virtualOutbound-catchall-tcp"
|
||
}
|
||
],
|
||
"trafficDirection": "OUTBOUND",
|
||
"hiddenEnvoyDeprecatedUseOriginalDst": true
|
||
}
|
||
]
|
||
</code></pre></li><li><p>Our request is an outbound HTTP request to port <code>9080</code> this means it gets handed off to the <code>0.0.0.0:9080</code> virtual
|
||
listener. This listener then looks up the route configuration in its configured RDS. In this case it will be looking
|
||
up route <code>9080</code> in RDS configured by Istiod (via ADS).</p><pre><code class=language-bash data-expandlinks=true data-outputis=json data-repo=istio>$ istioctl proxy-config listeners productpage-v1-6c886ff494-7vxhs -o json --address 0.0.0.0 --port 9080
|
||
...
|
||
"rds": {
|
||
"configSource": {
|
||
"ads": {},
|
||
"resourceApiVersion": "V3"
|
||
},
|
||
"routeConfigName": "9080"
|
||
}
|
||
...
|
||
</code></pre></li><li><p>The <code>9080</code> route configuration only has a virtual host for each service. Our request is heading to the reviews
|
||
service so Envoy will select the virtual host to which our request matches a domain. Once matched on domain Envoy
|
||
looks for the first route that matches the request. In this case we don’t have any advanced routing so there is only
|
||
one route that matches on everything. This route tells Envoy to send the request to the
|
||
<code>outbound|9080||reviews.default.svc.cluster.local</code> cluster.</p><pre><code class=language-bash data-expandlinks=true data-outputis=json data-repo=istio>$ istioctl proxy-config routes productpage-v1-6c886ff494-7vxhs --name 9080 -o json
|
||
[
|
||
{
|
||
"name": "9080",
|
||
"virtualHosts": [
|
||
{
|
||
"name": "reviews.default.svc.cluster.local:9080",
|
||
"domains": [
|
||
"reviews.default.svc.cluster.local",
|
||
"reviews.default.svc.cluster.local:9080",
|
||
"reviews",
|
||
"reviews:9080",
|
||
"reviews.default.svc.cluster",
|
||
"reviews.default.svc.cluster:9080",
|
||
"reviews.default.svc",
|
||
"reviews.default.svc:9080",
|
||
"reviews.default",
|
||
"reviews.default:9080",
|
||
"10.98.88.0",
|
||
"10.98.88.0:9080"
|
||
],
|
||
"routes": [
|
||
{
|
||
"name": "default",
|
||
"match": {
|
||
"prefix": "/"
|
||
},
|
||
"route": {
|
||
"cluster": "outbound|9080||reviews.default.svc.cluster.local",
|
||
"timeout": "0s",
|
||
}
|
||
}
|
||
]
|
||
...
|
||
</code></pre></li><li><p>This cluster is configured to retrieve the associated endpoints from Istiod (via ADS). So Envoy will then use the
|
||
<code>serviceName</code> field as a key to look up the list of Endpoints and proxy the request to one of them.</p><pre><code class=language-bash data-expandlinks=true data-outputis=json data-repo=istio>$ istioctl proxy-config cluster productpage-v1-6c886ff494-7vxhs --fqdn reviews.default.svc.cluster.local -o json
|
||
[
|
||
{
|
||
"name": "outbound|9080||reviews.default.svc.cluster.local",
|
||
"type": "EDS",
|
||
"edsClusterConfig": {
|
||
"edsConfig": {
|
||
"ads": {},
|
||
"resourceApiVersion": "V3"
|
||
},
|
||
"serviceName": "outbound|9080||reviews.default.svc.cluster.local"
|
||
},
|
||
"connectTimeout": "10s",
|
||
"circuitBreakers": {
|
||
"thresholds": [
|
||
{
|
||
"maxConnections": 4294967295,
|
||
"maxPendingRequests": 4294967295,
|
||
"maxRequests": 4294967295,
|
||
"maxRetries": 4294967295
|
||
}
|
||
]
|
||
},
|
||
}
|
||
]
|
||
</code></pre></li><li><p>To see the endpoints currently available for this cluster use the <code>proxy-config</code> endpoints command.</p><pre><code class=language-bash data-expandlinks=true data-outputis=json data-repo=istio>$ istioctl proxy-config endpoints productpage-v1-6c886ff494-7vxhs --cluster "outbound|9080||reviews.default.svc.cluster.local"
|
||
ENDPOINT STATUS OUTLIER CHECK CLUSTER
|
||
172.17.0.7:9080 HEALTHY OK outbound|9080||reviews.default.svc.cluster.local
|
||
172.17.0.8:9080 HEALTHY OK outbound|9080||reviews.default.svc.cluster.local
|
||
172.17.0.9:9080 HEALTHY OK outbound|9080||reviews.default.svc.cluster.local
|
||
</code></pre></li></ol><h2 id=inspecting-bootstrap-configuration>Inspecting bootstrap configuration</h2><p>So far we have looked at configuration retrieved (mostly) from Istiod, however Envoy requires some bootstrap configuration that
|
||
includes information like where Istiod can be found. To view this use the following command:</p><pre><code class=language-bash data-expandlinks=true data-outputis=json data-repo=istio>$ istioctl proxy-config bootstrap -n istio-system istio-ingressgateway-7d6874b48f-qxhn5
|
||
{
|
||
"bootstrap": {
|
||
"node": {
|
||
"id": "router~172.30.86.14~istio-ingressgateway-7d6874b48f-qxhn5.istio-system~istio-system.svc.cluster.local",
|
||
"cluster": "istio-ingressgateway",
|
||
"metadata": {
|
||
"CLUSTER_ID": "Kubernetes",
|
||
"EXCHANGE_KEYS": "NAME,NAMESPACE,INSTANCE_IPS,LABELS,OWNER,PLATFORM_METADATA,WORKLOAD_NAME,MESH_ID,SERVICE_ACCOUNT,CLUSTER_ID",
|
||
"INSTANCE_IPS": "10.244.0.7",
|
||
"ISTIO_PROXY_SHA": "istio-proxy:f98b7e538920abc408fbc91c22a3b32bc854d9dc",
|
||
"ISTIO_VERSION": "1.7.0",
|
||
"LABELS": {
|
||
"app": "istio-ingressgateway",
|
||
"chart": "gateways",
|
||
"heritage": "Tiller",
|
||
"istio": "ingressgateway",
|
||
"pod-template-hash": "68bf7d7f94",
|
||
"release": "istio",
|
||
"service.istio.io/canonical-name": "istio-ingressgateway",
|
||
"service.istio.io/canonical-revision": "latest"
|
||
},
|
||
"MESH_ID": "cluster.local",
|
||
"NAME": "istio-ingressgateway-68bf7d7f94-sp226",
|
||
"NAMESPACE": "istio-system",
|
||
"OWNER": "kubernetes://apis/apps/v1/namespaces/istio-system/deployments/istio-ingressgateway",
|
||
"ROUTER_MODE": "sni-dnat",
|
||
"SDS": "true",
|
||
"SERVICE_ACCOUNT": "istio-ingressgateway-service-account",
|
||
"WORKLOAD_NAME": "istio-ingressgateway"
|
||
},
|
||
"userAgentBuildVersion": {
|
||
"version": {
|
||
"majorNumber": 1,
|
||
"minorNumber": 15
|
||
},
|
||
"metadata": {
|
||
"build.type": "RELEASE",
|
||
"revision.sha": "f98b7e538920abc408fbc91c22a3b32bc854d9dc",
|
||
"revision.status": "Clean",
|
||
"ssl.version": "BoringSSL"
|
||
}
|
||
},
|
||
},
|
||
...
|
||
</code></pre><h2 id=verifying-connectivity-to-istiod>Verifying connectivity to Istiod</h2><p>Verifying connectivity to Istiod is a useful troubleshooting step. Every proxy container in the service mesh should be able to communicate with Istiod. This can be accomplished in a few simple steps:</p><ol><li><p>Create a <code>sleep</code> pod:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl create namespace foo
|
||
$ kubectl apply -f <(istioctl kube-inject -f samples/sleep/sleep.yaml) -n foo
|
||
</code></pre></li><li><p>Test connectivity to Istiod using <code>curl</code>. The following example invokes the v1 registration API using default Istiod configuration parameters and mutual TLS enabled:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl exec $(kubectl get pod -l app=sleep -n foo -o jsonpath={.items..metadata.name}) -c sleep -n foo -- curl -sS istiod.istio-system:15014/debug/endpointz
|
||
</code></pre></li></ol><p>You should receive a response listing the “service” and “endpoint” for each service in the mesh.</p><h2 id=what-envoy-version-is-istio-using>What Envoy version is Istio using?</h2><p>To find out the Envoy version used in deployment, you can <code>exec</code> into the container and query the <code>server_info</code> endpoint:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl exec -it prometheus-68b46fc8bb-dc965 -c istio-proxy -n istio-system pilot-agent request GET server_info
|
||
{
|
||
"version": "f98b7e538920abc408fbc91c22a3b32bc854d9dc/1.15.0/Clean/RELEASE/BoringSSL"
|
||
}
|
||
</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=/v1.8/blog/2020/mosn-proxy/>Using MOSN with Istio: an alternative data plane</a></p><p class=desc>An alternative sidecar proxy for Istio.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.8/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=/v1.8/docs/concepts/observability/>Observability</a></p><p class=desc>Describes the telemetry and monitoring features provided by Istio.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.8/docs/concepts/traffic-management/>Traffic Management</a></p><p class=desc>Describes the various Istio features focused on traffic routing and control.</p></div><div class=entry><p class=link><a data-skipendnotes=true href=/v1.8/docs/ops/configuration/traffic-management/tls-configuration/>TLS Configuration</a></p><p class=desc>How to configure TLS settings to secure network traffic.</p></div></div></nav></article><nav class=pagenav><div class=left><a title="Istio includes a supplemental tool that provides debugging and diagnosis for Istio service mesh deployments." href=/v1.8/docs/ops/diagnostic-tools/istioctl/><svg class="icon left-arrow"><use xlink:href="/v1.8/img/icons.svg#left-arrow"/></svg>Using the Istioctl Command-line Tool</a></div><div class=right><a title="Shows you how to use istioctl describe to verify the configurations of a pod in your mesh." href=/v1.8/docs/ops/diagnostic-tools/istioctl-describe/>Understand your Mesh with Istioctl Describe<svg class="icon right-arrow"><use xlink:href="/v1.8/img/icons.svg#right-arrow"/></svg></a></div></nav><div id=feedback><div id=feedback-initial>Was this information useful?<br><button class="btn feedback" onclick="sendFeedback('en',1)">Yes</button>
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<button class="btn feedback" onclick="sendFeedback('en',0)">No</button></div><div id=feedback-comment>Do you have any suggestions for improvement?<br><br><input id=feedback-textbox type=text placeholder="Help us improve..." data-lang=en></div><div id=feedback-thankyou>Thanks for your feedback!</div></div><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="Get an overview of your mesh"><a href=#get-an-overview-of-your-mesh>Get an overview of your mesh</a><li role=none aria-label="Retrieve diffs between Envoy and Istiod"><a href=#retrieve-diffs-between-envoy-and-istiod>Retrieve diffs between Envoy and Istiod</a><li role=none aria-label="Deep dive into Envoy configuration"><a href=#deep-dive-into-envoy-configuration>Deep dive into Envoy configuration</a><li role=none aria-label="Inspecting bootstrap configuration"><a href=#inspecting-bootstrap-configuration>Inspecting bootstrap configuration</a><li role=none aria-label="Verifying connectivity to Istiod"><a href=#verifying-connectivity-to-istiod>Verifying connectivity to Istiod</a><li role=none aria-label="What Envoy version is Istio using?"><a href=#what-envoy-version-is-istio-using>What Envoy version is Istio using?</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 1.8.3 now" href=/v1.8/docs/setup/getting-started/#download aria-label="Download Istio"><span>download</span><svg class="icon download"><use xlink:href="/v1.8/img/icons.svg#download"/></svg>
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1.8.3<br>© 2020 Istio Authors, <a href=https://policies.google.com/privacy>Privacy Policy</a><br>Archived on February 9, 2021</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 github"><use xlink:href="/v1.8/img/icons.svg#github"/></svg></a>
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