本文档介绍如何使用 Cloud Service Mesh 配置边车代理注入,以增强网络安全性、可靠性和可观测性。这些功能从应用的主容器中抽象出来,并在作为同一 pod 中单独的容器提供的常见进程外代理 (Sidecar) 中实现。这可提供 Cloud Service Mesh 的功能,而无需重新设计生产应用以参与服务网格。
当 Cloud Service Mesh 检测到您为工作负载 Pod 配置的命名空间标签时,将自动进行边车代理注入(即自动注入)。该代理会拦截工作负载的所有入站和出站流量,并与 Cloud Service Mesh 通信。
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-08-28。"],[],[],null,["# Inject sidecar proxies with Cloud Service Mesh\n==============================================\n\nThis document covers how to configure sidecar proxy injection with Cloud Service Mesh\nto enhance network security, reliability, and observability. These functions are\nabstracted away from the application's primary container and implemented in a\ncommon out-of-process proxy (the sidecar), delivered as a separate container in\nthe same Pod. This provides the\n[Cloud Service Mesh's features](/service-mesh/v1.19/docs/overview) without redesigning your\nproduction applications to participate in a service mesh.\n\nAutomatic sidecar proxy injection (auto-injection) occurs when Cloud Service Mesh\ndetects a namespace label you configure for the workload's Pod. The proxy\nintercepts all inbound and outbound traffic to the workloads and communicates\nwith Cloud Service Mesh.\n\n#### Permissions required for these tasks\n\n\nTo perform the tasks on this page, you must have the\n`roles/container.clusterAdmin` or a higher role. See\n[Google Kubernetes Engine roles](/iam/docs/understanding-roles#container) for\ndetails on the permissions included in this role.\n\nEnabling automatic sidecar injection\n------------------------------------\n\nThe recommended way to inject sidecar proxies is to use the webhooks-based\nautomatic sidecar injector, although you can manually update your Pods'\nKubernetes configuration.\n\nTo enable auto-injection, you label your namespaces with the\n*[default injection labels](https://istio.io/latest/docs/setup/upgrade/canary/#default-tag)*\nif the default tag is set up, or with the\n[revision label](/service-mesh/v1.19/docs/revisions-overview) to your namespace.\nThe label that you add also depends on whether you deployed\nmanaged Cloud Service Mesh (with the\n[fleet API](/service-mesh/v1.19/docs/managed/provision-managed-anthos-service-mesh) or with\n[`asmcli`](/service-mesh/v1.19/docs/managed/provision-managed-anthos-service-mesh-asmcli)), or\ninstalled the in-cluster control plane. The label is used by the sidecar\ninjector webhook to associate injected sidecars with a particular control plane\nrevision.\n\nTo enable auto-injection: \n\n### In-cluster\n\n1. Use the following command to locate the revision label on `istiod`:\n\n kubectl -n istio-system get pods -l app=istiod --show-labels\n\n The output looks similar to the following: \n\n ```bash\n NAME READY STATUS RESTARTS AGE LABELS\n istiod-asm-11910-9-5788d57586-bljj4 1/1 Running 0 23h app=istiod,istio.io/rev=asm-11910-9,istio=istiod,pod-template-hash=5788d57586\n istiod-asm-11910-9-5788d57586-vsklm 1/1 Running 1 23h app=istiod,istio.io/rev=asm-11910-9,istio=istiod,pod-template-hash=5788d57586\n ```\n\n In the output, under the `LABELS` column, note the value of the `istiod`\n revision label, which follows the prefix `istio.io/rev=`. In this\n example, the value is `asm-11910-9`.\n\n\n | **Note:** You can substitute `istio.io/rev` with the `istio-injection=enabled` label if the [default tag](https://istio.io/latest/docs/setup/upgrade/canary/#default-tag) is configured. Verify the default tag exists by running ` istioctl tag list` with the `istioctl` from \u003cvar translate=\"no\"\u003eOUTPUT_DIR\u003c/var\u003e.\n\n \u003cbr /\u003e\n\n2. Apply the revision label to namespaces and remove the istio-injection label\n (if it exists). In the following command, \u003cvar translate=\"no\"\u003eNAMESPACE\u003c/var\u003e is\n the name of the namespace where you want to enable auto-injection, and\n \u003cvar translate=\"no\"\u003eREVISION\u003c/var\u003e is the revision label you noted in the\n previous step.\n\n kubectl label namespace \u003cvar translate=\"no\"\u003eNAMESPACE\u003c/var\u003e istio-injection- istio.io/rev=\u003cvar translate=\"no\"\u003eREVISION\u003c/var\u003e --overwrite\n\n\n You can ignore the message `\"istio-injection not found\"` in the\n output. That means that the namespace didn't previously have the\n `istio-injection` label, which you should expect in new\n installations of Cloud Service Mesh or new deployments. Because auto-injection\n behavior is undefined when a namespace has both the `istio-injection`\n and the revision label, all `kubectl label` commands in the\n Cloud Service Mesh documentation explicitly ensure that only one is set.\n3. Restart the affected pods, using the steps in the next section.\n\n### Managed service mesh\n\n1. Use the following command to locate the available release channels:\n\n kubectl -n istio-system get controlplanerevision\n\n The output is similar to the following: \n\n NAME AGE\n asm-managed 6d7h\n\n In the output, select the value under the `NAME` column is the\n \u003cvar translate=\"no\"\u003eREVISION\u003c/var\u003e label that corresponds to the available\n [release channel](/service-mesh/v1.19/docs/managed/select-a-release-channel#anthos_service_mesh_versions_per_channel)\n for the Cloud Service Mesh version. Apply this label to your namespaces, and\n remove the `istio-injection` label (if it exists).\n In the following command, replace \u003cvar translate=\"no\"\u003eREVISION\u003c/var\u003e with the\n revision label you noted above, and replace\n \u003cvar translate=\"no\"\u003eNAMESPACE\u003c/var\u003e` ` with the name of the namespace where you\n want to enable auto-injection: \n\n kubectl label namespace \u003cvar translate=\"no\"\u003eNAMESPACE\u003c/var\u003e istio-injection- istio.io/rev=\u003cvar translate=\"no\"\u003eREVISION\u003c/var\u003e --overwrite\n\n\n You can ignore the message `\"istio-injection not found\"` in the\n output. That means that the namespace didn't previously have the\n `istio-injection` label, which you should expect in new\n installations of Cloud Service Mesh or new deployments. Because auto-injection\n behavior is undefined when a namespace has both the `istio-injection`\n and the revision label, all `kubectl label` commands in the\n Cloud Service Mesh documentation explicitly ensure that only one is set.\n2. Restart the affected pods, using the steps in the next section.\n\n3. If you also deployed the optional\n [Google-managed data plane](/service-mesh/v1.19/docs/managed/provision-managed-anthos-service-mesh#managed-data-plane),\n annotate the `demo` namespace as follows:\n\n kubectl annotate --overwrite namespace \u003cvar translate=\"no\"\u003eYOUR_NAMESPACE\u003c/var\u003e \\\n mesh.cloud.google.com/proxy='{\"managed\":\"true\"}'\n\n### Restart Pods to update sidecar proxies\n\n| **Warning:** Unless you have a load balancer or router setup for [blue-green deployments](https://martinfowler.com/bliki/BlueGreenDeployment.html), make sure you test restarting Pods in a staging environment to verify that your services can handle any potential traffic interruption.\n\nWith automatic sidecar injection, you can update the sidecars for existing Pods\nwith a Pod restart:\n\nHow you restart Pods depends on if they were created as part of a\n[Deployment](https://kubernetes.io/docs/concepts/workloads/controllers/deployment/).\n\n1. If you used a Deployment, restart the Deployment, which restarts all Pods\n with sidecars:\n\n ```\n kubectl rollout restart deployment -n YOUR_NAMESPACE\n ```\n\n If you didn't use a Deployment, delete the Pods, and they are automatically\n recreated with sidecars: \n\n ```\n kubectl delete pod -n YOUR_NAMESPACE --all\n ```\n2. Check that all the Pods in the namespace have sidecars injected:\n\n ```\n kubectl get pod -n YOUR_NAMESPACE\n ```\n\n In the following example output from the previous command, notice that the\n `READY` column indicates there are two containers for each of your\n workloads: the primary container and the container for the sidecar proxy. \n\n ```\n NAME READY STATUS RESTARTS AGE\n YOUR_WORKLOAD 2/2 Running 0 20s\n ...\n ```\n\nWhat's next\n-----------\n\nLearn more about:\n\n- [Cloud Service Mesh control plane revisions](/service-mesh/v1.19/docs/revisions-overview)\n- [Deploying workloads](/kubernetes-engine/docs/how-to/deploying-workloads-overview)\n- [Customizing injection](https://istio.io/latest/docs/setup/additional-setup/sidecar-injection/#customizing-injection)"]]