K8S - 各节点的kube-flannel-ds-amd64-xxxxx不能正常启动的问题

- kubectl get pods -A -o wide

- 查看日志发现

• pods "kube-flannel-ds-amd64-xxxxx" is forbidden: User "system:serviceaccount:kube-system:flannel" cannot get resource "pods" in API group "" in the namespace "kube-system"

• 也就是说flannel用户不能访问kube-system空间下的pods资源

• 但kube-flannel空间下的pod都正常，说明这个集群角色绑定需要再把kube-system空间再绑一下即可

• kubectl describe clusterrolebinding -A

  kubectl get clusterrole -A |grep flannel

  flannel

  kubectl describe clusterrole flannel

  Name: flannel
  Labels: k8s-app=flannel
  Annotations: <none>
  PolicyRule:
  Resources Non-Resource URLs Resource Names Verbs
  --------- ----------------- -------------- -----
  nodes [] [] [get list watch]
  pods [] [] [get]
  clustercidrs.networking.k8s.io [] [] [list watch]
  nodes/status [] [] [patch]

• 查到有一个clusterrole=flannel 集群角色，直接给他们绑定即可

  • kubectl create clusterrolebinding add-on-flannel
  • --clusterrole=flannel
  • --serviceaccount=kube-system:flannel

kubectl describe clusterrolebinding -A

• #新添加的clusterrolebinding将flannel用户绑定到了kube-system空间，解决上面的异常

• Name: add-on-flannel

• Labels: <none>

• Annotations: <none>

• Role:

• Kind: ClusterRole

• Name: flannel

• Subjects:

• Kind Name Namespace

• ServiceAccount flannel kube-system

• #之前有一个clusterrolebinding将flannel用户绑定到了kube-flannel空间

• Name: flannel

• Labels: k8s-app=flannel

• Annotations: <none>

• Role:

• Kind: ClusterRole

• Name: flannel

• Subjects:

• Kind Name Namespace

• ServiceAccount flannel kube-flannel

• 三个节点上的kube-flannel-ds-amd64-xxxxx容器过会都自动启动了

参考：k8s--普通k8s集群---使用rolebinding限制或增加访问命名空间以及可执行操作权限-CSDN博客