如何执行shell脚本从POD A到另一个POD B

Question

我有两个豆荚在kubernetes星系团内运行。豆荚如下

1. MongoDB豆荚，其类型为：statefulset
2. 脚本吊舱，其类型为:job

kubectl exec mongo-0 -c mongo -- mongo --eval 'rs.initiate({_id: "rs0", version: 1, members: [ {_id: 0, host: "mongo-0.mongo.default.svc.cluster.local:27017"}, {_id: 1, host: "mongo-1.mongo.default.svc.cluster.local:27017"}, {_id: 2, host: "mongo-2.mongo.default.svc.cluster.local:27017"} ]});'

Error from server (Forbidden): pods "mongo-0" is forbidden: User "system:serviceaccount:default:default" cannot create resource "pods/exec" in API group "" in the namespace "default"

如何为脚本吊舱提供在mongodb吊舱中运行上述命令的权限？

因此，正如您所说，我创建了另一个类似的pod：job并包含了script.sh。

在script.sh文件中，我运行“Kubectl exec”到主吊舱以运行一些命令

因此，我使用资源创建了一个clusterrole:[“pods/exec”]并使用ClusterRoleBinding将其绑定到默认服务帐户

kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: pod-reader
rules:
- apiGroups: [""]
  resources: ["pods", "pods/log"]
  verbs: ["get", "list"]
- apiGroups: [""]
  resources: ["pods/exec"]
  verbs: ["create"]

--- 

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: service-account-role-binding
  namespace: default
subjects:
  - kind: ServiceAccount
    name: default
    namespace: default
roleRef:
  kind: ClusterRole
  name: pod-reader
  apiGroup: rbac.authorization.k8s.io

---

apiVersion: v1
kind: ServiceAccount
metadata:
  name: default
  namespace: default


In the pod which is of kind:job, I include the service account like shown below

restartPolicy: Never
serviceAccountName: default

but I still get the same error. What am I doing wrong here ?

Error from server (Forbidden): pods "mongo-0" is forbidden: User "system:serviceaccount:default:default" cannot create resource "pods/exec" in API group "" in the namespace "default"

Answer 1

如果这是为了维护而需要定期运行的东西，请查看Kubernetes守护进程集对象。