在 pod 内扩展 kubernetes 部署 - 权限被拒绝？

Question

我正在尝试从 pod 中扩大和缩小部署。
为此，我创建了一个服务帐户，使用以下 rbac 进行 clusterrolebinding：

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  namespace: backups-scripts
  name: backups-roles
rules:
  - apiGroups: [""]
    resources:
      - pods
    verbs:
      - get
      - list
      - delete
      - watch
  - apiGroups: ["apps","extensions"]
    resources:
      - deployments
      - replicasets
      - statefulsets
    verbs:
      - get
      - list
      - patch
      - update
      - watch
      - scale

使用 auth can-i kube 进行测试时说一切正常：

$ kubectl auth can-i delete deployment  --namespace vm-catalogue --as system:serviceaccount:backups-scripts:backups-sa
no - no RBAC policy matched
$ kubectl auth can-i list deployment  --namespace vm-catalogue --as system:serviceaccount:backups-scripts:backups-sa
yes
$ kubectl auth can-i scale deployment  --namespace vm-catalogue --as system:serviceaccount:backups-scripts:backups-sa
yes
$ kubectl auth can-i update deployment  --namespace vm-catalogue --as system:serviceaccount:backups-scripts:backups-sa
yes
$ kubectl auth can-i patch deployment  --namespace vm-catalogue --as system:serviceaccount:backups-scripts:backups-sa
yes

但是现在在 pod 中执行 kubectl 命令时，出现以下错误：

$ kubectl scale --replicas="$replicas" deployment -n "vm-catalogue" "mysql"
 Error from server (Forbidden): deployments.extensions "mysql" is forbidden: User "system:serviceaccount:backups-scripts:backups-sa" cannot get resource "deployments/scale" in API group "extensions" in the namespace "vm-catalogue"

我知道“list”和“get”动词有效，因为我在脚本中提取了这些信息（并且该部分有效）。

所以..我不明白，我错过了什么？

Answer 1

我认为您粘贴的错误消息很好地说明了这一点：

$ kubectl scale --replicas="$replicas" deployment -n "vm-catalogue" "mysql"
 Error from server (Forbidden): deployments.extensions "mysql" is forbidden: User "system:serviceaccount:backups-scripts:backups-sa" cannot get resource "deployments/scale" in API group "extensions" in the namespace "vm-catalogue"

无法获取资源“deployments/scale”

根据Kubernetes rbac docs #referring to resources

"要在 RBAC 角色中表示这一点，请使用斜杠 (/) 分隔资源和子资源".

如：

- deployments/scale
- deployments/status
- pods/log

在 pod 内扩展 kubernetes 部署 - 权限被拒绝？

Scale kubernetes deployment within a pod - permission denied?

rbac

kubernetes