如何在Google Kubernetes Engine中为KubeIP部署ClusterRoleBinding

Question

我在尝试将KubeIP部署到GKE时看到RBAC失败。

我已将问题分离到KubeIP infrastructure的以下部分：

kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: kubeip-sa
  namespace: kube-system
rules:
- apiGroups: [""]
  resources: ["nodes"]
  verbs: ["get","list","watch","patch"]
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get","list","watch"]

我从kubectl和GKE收到以下错误：

服务器出错（禁止）：创建“template.yml”时出错：clusterroles.rbac.authorization.k8s.io“kubeip-sa”被禁止：尝试授予额外权限：[{[get] [] [nodes] [ ] []} {[list] [] [nodes] [] []} {[watch] [] [nodes] [] []} {[patch] [] [nodes] [] []} {[get] [] [pods] [] []} {[list] [] [pods] [] []} {[watch] [] [pods] [] []}] user =＆{108986779198363313539 [system：authenticated] map [user-assertion.cloud.google.com:[AKUJVpldMDXqrDZ2slnJReDbLytxt6P2EEyEBbLNRB90oOATH4vIURo/lIhaBuAj9nnwwyxJDSxj2OdCyjjgBC/s5QxftIJnr8128ToTglCzk+e8Wybt4heIizRHugWnIhKNqkF+B0yiv0pIxgOfakma+SbkzbQbVzJPtgxsmHmak30YfPA58n/xyJ8R7oNVJ5dFUAWDFNsqHf/auolViw0Zd7Cr4aYYDXX4GScw==]]} ownerrules = [{[创建] [authorization.k8s.io] [selfsubjectaccessreviews selfsubjectrulesreviews] [] []} {[get] [] [] [] [/ api / api / * / apis / apis / * / healthz / openapi / openapi / * /swagger-2.0.0.pb-v1 /swagger.json / swaggerapi / swaggerapi / * / version / version /]}] ruleResolutionErrors = []

我通过发出创建了适当的〜/ .kubeconfig

gcloud container clusters get-credentials <cluster> \
  --zone <zone> \
  --project <project>

我正在使用的gcloud服务帐户已在相关的GKE集群中被授予cluster-admin

kubectl create clusterrolebinding cluster-admin-binding \
  --clusterrole cluster-admin \
  --user $(gcloud config get-value account)

我可以验证我的服务帐户用户是否应该使用cluster-admin角色检查我当前的gcloud用户并检查GKE ClusterRoleBinding

$ gcloud config get-value account
terraform@<project>.iam.gserviceaccount.com

$ kubectl describe clusterrolebinding cluster-admin-binding
Name:         cluster-admin-binding
Labels:       <none>
Annotations:  <none>
Role:
  Kind:  ClusterRole
  Name:  cluster-admin
Subjects:
  Kind  Name                                                Namespace
  ----  ----                                                ---------
  User  terraform@<project>.iam.gserviceaccount.com  

根据kubectl我应该能够创建ClusterRoleBindings

$ kubectl auth can-i create clusterrolebinding
yes

有人看到我错过了GKE RBAC的哪些元素？

Answer 1

这个问题“Creating a ClusterRole as the default compute service account fails with extra privileges error”的答案引导我解决问题。

如果将ClusterRoleBinding映射到服务帐户ID而不是电子邮件，则一切都按预期工作。

kubectl create clusterrolebinding cluster-admin-binding \
  --clusterrole cluster-admin \
  --user $(gcloud iam service-accounts describe <service account email> --format="value(uniqueId)")