Question

我有以下用户清单，我想允许myapp用户获取集群中所有名称空间的列表。根据我的查找，我应该创建一个ClusterRole，但实际上找不到足够的详细信息。是否有所有apiGroup的列表以及相应的资源和动词？

apiVersion: v1
kind: ServiceAccount
metadata:
  name: myapp-user
  namespace: myapp

---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: myapp-user-role
  namespace: myapp
rules:
- apiGroups: ["", "extensions", "apps"]
  resources: ["*"]
  verbs: ["*"]
- apiGroups: ["batch"]
  resources:
  - jobs
  - cronjobs
  verbs: ["*"]
- apiGroups: ["networking.k8s.io"]
  resources:
  - ingress
  verbs: ["*"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: myapp-user
  namespace: myapp
subjects:
- kind: ServiceAccount
  name: myapp-suer
  namespace: myapp
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: myapp-user-role

我虽然将其添加到role.rules中可能会有所帮助，但不幸的是

- apiGroups: [""]
  resources: ["namespaces"]
  verbs: ["GET"]

Answer 1

您可以通过

获取API资源。

kubectl api-resources

NAME                              SHORTNAMES   APIGROUP                       NAMESPACED   KIND
bindings                                                                      true         Binding
componentstatuses                 cs                                          false        ComponentStatus
configmaps                        cm                                          true         ConfigMap
endpoints                         ep                                          true         Endpoints
events                            ev                                          true         Event
limitranges                       limits                                      true         LimitRange
namespaces                        ns                                          false        Namespace
nodes                             no                                          false        Node
persistentvolumeclaims            pvc                                         true         PersistentVolumeClaim
persistentvolumes                 pv                                          false        PersistentVolume

对于创建clusterrole和clusterolebinding，应使用以下命令。

kubectl create clusterrole cr --verb=get,list --resource=namespaces

kubectl create clusterrolebinding crb --clusterrole=cr --serviceaccount=default:default

然后进行测试

kubectl auth can-i get ns --as=system:serviceaccount:default:default
kubectl auth can-i list ns --as=system:serviceaccount:default:default

Answer 2

您可以通过以下命令列出集群支持的所有资源类型：

❯❯❯ kubectl api-resources
NAME                              SHORTNAMES   APIGROUP                           NAMESPACED   KIND
bindings                                                                          true         Binding
componentstatuses                 cs                                              false        ComponentStatus
configmaps                        cm                                              true         ConfigMap
endpoints                         ep                                              true         Endpoints
events                            ev                                              true         Event
limitranges                       limits                                          true         LimitRange
namespaces                        ns                                              false        Namespace
nodes                             no                                              false        Node
persistentvolumeclaims            pvc                                             true         PersistentVolumeClaim
persistentvolumes                 pv                                              false        PersistentVolume

要查看这些资源支持的所有动作/动词，您需要查找与您相关的版本的kubernetes参考文档，例如对于CronJobs https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.18/#cronjob-v1beta1-batch

Answer 3

由于@ abhishek-jaisingh和@ arghya-sadhu的回答，我得以弄清楚并重写了清单中的命令。

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: myapp-user-cr
rules:
- apiGroups: [""]
  resources: ["namespaces"]
  verbs: ["get", "list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: myapp-user-crb
  namespace: myapp
subjects:
- kind: ServiceAccount
  name: myapp-user
  namespace: myapp
roleRef:
  kind: ClusterRole
  name: myapp-user-cr
  apiGroup: rbac.authorization.k8s.io

允许Kubernetes用户列出/获取名称空间

3 个答案: