Kubernetes 從外部訪問度量服務器 API

Question

我正在嘗試在不使用kubectl proxy的情況下訪問 k8s 集群的指標服務器。 在https://kubernetes.io/docs/tasks/administer-cluster/access-cluster-api/#without-kubectl-proxy找到教程后，我遇到了一個問題。

發出請求時curl -X GET $APISERVER/apis/metrics.k8s.io/v1beta1/nodes --header "Authorization: Bearer $TOKEN" --insecure | jq curl -X GET $APISERVER/apis/metrics.k8s.io/v1beta1/nodes --header "Authorization: Bearer $TOKEN" --insecure | jq我收到以下權限錯誤：

curl -X GET $APISERVER/apis/metrics.k8s.io/v1beta1/nodes --header "Authorization: Bearer $TOKEN" --insecure | jq                                                                                       11:58AM
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   386  100   386    0     0   2064      0 --:--:-- --:--:-- --:--:--  2064
{
  "kind": "Status",
  "apiVersion": "v1",
  "metadata": {},
  "status": "Failure",
  "message": "nodes.metrics.k8s.io is forbidden: User \"system:serviceaccount:default:default\" cannot list resource \"nodes\" in API group \"metrics.k8s.io\" at the cluster scope",
  "reason": "Forbidden",
  "details": {
    "group": "metrics.k8s.io",
    "kind": "nodes"
  },
  "code": 403
}

我嘗試使用以下testaccount創建自定義 ServiceAccount 測試帳戶：

apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
  name: test-admin
rules:
- apiGroups: [""]
  resources: ["pods", "nodes"]
  verbs: ["get", "watch", "list"]

---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: test-rbac
subjects:
- kind: ServiceAccount
  name: testaccount
  namespace: default
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io

我已經嘗試使用包含的 ClusterRole 以及cluster-admin集群角色。 使用這些更改后生成的令牌，我仍然得到相同的 curl 錯誤。

Answer 1

我發現需要修改的是apiGroups 。 以下 ClusterRole 和 ClusterRoleBinding 有效：

apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
  name: test-admin
rules:
- apiGroups: ["*"] # This was the change
  resources: ["pods", "nodes"]
  verbs: ["get", "watch", "list"]

---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: test-rbac
subjects:
- kind: ServiceAccount
  name: testaccount
  namespace: default
roleRef:
  kind: ClusterRole
  name: test-admin
  apiGroup: rbac.authorization.k8s.io