如何使用同一k8s集群中的kubectl exec从另一个Pod中的一个Pod执行命令

问题描述

我在集群中有两个吊舱.让我们将它们称为A和B.我已经在pod A内安装了kubectl，我试图使用kubectl exec -it podB -- bash在pod A内的pod B内运行命令.我收到以下错误

I have two pods in a cluster. Lets call them A and B. I've installed kubectl inside pod A and I am trying to run a command inside pod B from pod A using kubectl exec -it podB -- bash.I am getting the following error

Error from server (Forbidden): pods "B" is forbidden: User "system:serviceaccount:default:default" cannot create pods/exec in the namespace "default"

我创建了以下Role和RoleBinding以获取访问权限.角色yaml

I've created the following Role and RoleBinding to get access.Role yaml

kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: api-role
  namespace: default
  labels:
    app: tools-rbac
rules:
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]

角色绑定Yaml

kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: global-rolebinding
  namespace: default
  labels:
    app: tools-rbac
subjects:
- kind: Group
  name: system:serviceaccounts
  apiGroup: rbac.authorization.k8s.io

任何帮助将不胜感激.谢谢

Any help is greatly appreciated. Thank you

推荐答案

除了像pods一样，您还需要授予对pods/exec子资源的访问权限.就是说，这是一件很奇怪的事情，可能很难思考这是否是最好的解决方案.

You would need to give access to the pods/exec subresource in addition to pods like you have there. That said, this is a very weird thing to do and probably think very hard as to if this is the best solution.

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