[kubernetes]-kubernetes创建多namespace权限的kubeconfig

Love The Way You Lie 2023-03-03 15:25 12阅读 0赞

\#1. 创建集群级别的角色 ClusterRole

# clusterrole.yaml 提供基本权限
    apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRole
    metadata:
      name: cr-hz
    rules:
      - apiGroups: [""]
        resources: ["pods"]
        verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
      - apiGroups: ["extensions", "apps"]
        resources: ["deployments"]
        verbs: ["get", "watch", "list"]
      - apiGroups: [""]
        resources: ["pods/exec"]
        verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
      - apiGroups: [""]
        resources: ["pods/log"]
        verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]

创建clusterrole.cr-namespace.yaml

提供kubectl get namespace能力

# clusterrole.cr-namespace.yaml 提供namespace的查看权限
    apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRole
    metadata:
      name: cr-namespace-hz
    rules:
    - apiGroups:
      - ""
      resources:
      - namespaces/status
      - namespaces
      verbs:
      - get
      - list
      - watch

kubectl apply -f clusterrole.yaml
    kubectl apply -f clusterrole.cr-namespace.yaml

\#2. 在default命名空间创建 ServiceAccount

注意，创建sa后，会自动创建一个绑定的 secret

后面在kubeconfig文件中，会用到该secret中的token

kubectl create serviceaccount hz

\#3. 对sa和集群角色建立绑定关系

#这里对dev和test两个namespace授权
    kubectl create rolebinding rbd-hz --clusterrole=cr-hz --serviceaccount=default:hz --namespace=dev
    kubectl create rolebinding rbd-hz --clusterrole=cr-hz --serviceaccount=default:hz --namespace=test
    kubectl create rolebinding rbd-hz --clusterrole=cr-hz --serviceaccount=default:hz --namespace=peg
    #这里namespace会将集群级别的权限限定在某个namespace下，cr-devlog中定认的集群权限仅作用于dev和test名称空间
    kubectl create clusterrolebinding crbd-hz --clusterrole=cr-namespace-hz --serviceaccount=default:hz

\#4.获取token先测试一下

kubectl get secret  |grep hz-token
    token_name=`kubectl get secret  |grep hz-token |awk '{print $1}'`
    secret=`kubectl  describe secret $token_name|grep "token:" |awk -F":" '{print $NF}'`
    echo $secret

\#5.生成config文件

kubectl config set-cluster kubernetes --server=192.168.1.202:6443 --kubeconfig=/kubernetes/dashboard/dashboard-h z.conf
    # 这里的scret参数需要替换成上面获取到的登陆的token值
    kubectl config set-credentials dashboard-hz --token="$secret" --kubeconfig=/kubernetes/dashboard/dashboard-hz.conf
    kubectl config set-context dashboard-hz@kubernetes --cluster=kubernetes --user=dashboard-hz --kubeconfig=/kubernetes/dashboard/dashboard-hz.conf
    kubectl config use-context dashboard-hz@kubernetes  --kubeconfig=/kubernetes/dashboard/dashboard-hz.conf

\#6.导出config文件 测试

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参考

https://pdf.us/2019/09/20/3650.html

[format_png]: /images/20230208/90e0a4674d464077b9456524953cf717.png
[format_png 1]: /images/20230208/f516ddce9b694c92939f26452d554a4d.png
[format_png 2]: /images/20230208/10e561d8e61b49c591dbb4771f74944c.png