Kubernetes ImagePullBackOff排查方法

[root@master ~]# kubectl get pods
NAME                           READY   STATUS              RESTARTS   AGE
hello-world-6b6d6fd479-d7tp4   0/1     ContainerCreating   0          5m48s
hello-world-6b6d6fd479-ksgbr   0/1     ContainerCreating   0          5m48s
hello-world-6b6d6fd479-zn85h   0/1     ImagePullBackOff    0          5m48s

[root@master ~]# kubectl describe pod hello-world-6b6d6fd479-zn85h
Name:           hello-world-6b6d6fd479-zn85h
Namespace:      default
Priority:       0
Node:           node-2/10.211.55.102
Start Time:     Tue, 12 Jan 2021 14:51:35 +0800
Labels:         app=hello-world
                pod-template-hash=6b6d6fd479
Annotations:    <none>
Status:         Pending
IP:             10.244.2.15
Controlled By:  ReplicaSet/hello-world-6b6d6fd479
Containers:
  hello:
    Container ID:
    Image:          lixinhelp/hello:2.0.0-SNAPSHOT
    Image ID:
    Port:           <none>
    Host Port:      <none>
    State:          Waiting
      Reason:       ImagePullBackOff
    Ready:          False
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-9dkwx (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             False
  ContainersReady   False
  PodScheduled      True
Volumes:
  default-token-9dkwx:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-9dkwx
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:
  Type     Reason     Age                    From               Message
  ----     ------     ----                   ----               -------
  Normal   Scheduled  8m34s                  default-scheduler  Successfully assigned default/hello-world-6b6d6fd479-zn85h to node-2
  Warning  Failed     3m45s                  kubelet, node-2    Failed to pull image "lixinhelp/hello:2.0.0-SNAPSHOT": rpc error: code = Unknown desc = context canceled
  Warning  Failed     3m45s                  kubelet, node-2    Error: ErrImagePull
  Normal   BackOff    3m45s                  kubelet, node-2    Back-off pulling image "lixinhelp/hello:2.0.0-SNAPSHOT"
  ############################################ImagePullBackOff#####################################################
  ############################################在node-2拉取镜像失败###################################################
  ############################################自己手动去拉取镜即可###################################################
  Warning  Failed     3m45s                  kubelet, node-2    Error: ImagePullBackOff
  Normal   Pulling    3m34s (x2 over 8m33s)  kubelet, node-2    Pulling image "lixinhelp/hello:2.0.0-SNAPSHOT"

[root@master ~]# kubectl logs  hello-world-6b6d6fd479-ksgbr
Error from server (BadRequest): container "hello" in pod "hello-world-6b6d6fd479-ksgbr" is waiting to start: trying and failing to pull image