Workload Identity を使用すると、クラスタ内のアプリケーションごとにきめ細かい ID と認可を割り当てることができます。Workload Identity は、GKE on Azure 内で実行されているアプリケーションで Azure と Google Cloud サービスにアクセスする場合に推奨される方法です。
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["わかりにくい","hardToUnderstand","thumb-down"],["情報またはサンプルコードが不正確","incorrectInformationOrSampleCode","thumb-down"],["必要な情報 / サンプルがない","missingTheInformationSamplesINeed","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2024-06-28 UTC。"],[],[],null,["# Workload identity overview\n==========================\n\n*Workload identity* enables you to assign distinct, fine-grained identities and\nauthorization for each application in your cluster. Workload identity is the\nrecommended way for applications running within GKE on Azure to access\nAzure and Google Cloud services.\n\nAll GKE clusters have workload identity enabled.\n\nKubernetes service accounts\n---------------------------\n\nWorkload identity implements *identity federation* , or delegating trust or roles\nto an external provider. Each cluster has a built-in OpenID Connect (OIDC)\nprovider. When a Pod runs in the cluster, it runs using a\n[Kubernetes service account](https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/).\nThe Pod can be configured to obtain a token with short-lived credentials for\nits Kubernetes service account using a\n[Bound Service Account Token Volume](https://kubernetes.io/docs/reference/access-authn-authz/service-accounts-admin/#bound-service-account-token-volume).\n\nOpenID Connect providers\n------------------------\n\nEach cluster can act as an\n[OpenID Connect (OIDC)](https://openid.net/connect/) provider. With\nthis provider, you can provide Kubernetes service account credentials to\nservices that support identity federation using OIDC.\n\nThis provider's issuer URI also serves as an OIDC discovery endpoint. Services\ncan use this discovery endpoint to obtain the JSON Web Key Set (JWKS), which\nprovides public key information that allows them to verify Kubernetes service\naccount credentials.\n\nGoogle Cloud IAM identity pools and providers\n---------------------------------------------\n\nGoogle Cloud IAM supports\n[identity federation using OIDC](https://cloud.google.com/iam/docs/workload-identity-federation).\nAll GKE clusters are configured as identity providers in the\nworkload identity pool \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e`.svc.id.goog`.\n\nTo get the name of your workload identity pool and providers, see\n[Use workload identity with Google Cloud](/kubernetes-engine/multi-cloud/docs/azure/how-to/use-workload-identity-google#determine_the_workload_identity_pool_for_your_cluster).\n\nAlternatives to workload identity\n---------------------------------\n\nThere are alternative methods to access services from GKE on Azure.\nWe don't recommended the following methods due to complications.\n\n1. Export credentials and store them as Kubernetes Secrets. In this case,\n you must rotate stored credentials manually in both Azure IAM and\n in your cluster. Additionally, if an attacker steals credentials, they can\n exploit them.\n\n2. Attach credentials to the node pools's underlying instances. In this case,\n all workloads running on the same node share the credentials,\n which can result in a greater set of permissions than workloads might\n need. To block access to an instance's permissions, GKE clusters\n blocks access from a Pod to the instance metadata service.\n\nWhat's next\n-----------\n\n- [Using workload identity with Google Cloud services](/kubernetes-engine/multi-cloud/docs/azure/how-to/use-workload-identity-google)\n- Learn more about [Workload identity federation](/iam/docs/workload-identity-federation#pools)"]]
