Kubectl 在通過 minikube 創建部署時拋出 ImagePullBackOff 錯誤

Question

嘗試從映像創建部署

kubectl create deployment hello-minikube --image=k8s.gcr.io/echoserver:1.10

然后使用kubectl get pods並檢查 hello-minikube pod 的日志

kubectl pod describe <pod-name>拋出以下錯誤

  Type     Reason     Age                From               Message
  ----     ------     ----               ----               -------
  Normal   Scheduled  <unknown>          default-scheduler  Successfully assigned default/hello-minikube-797f975945-dmq26 to minikube
  Warning  Failed     42s                kubelet, minikube  Failed to pull image "k8s.gcr.io/echoserver:1.10": rpc error: code = Unknown desc = Error response from daemon: Get https://k8s.gcr.io/v2/: dial tcp: lookup k8s.gcr.io on 192.168.64.1:53: read udp 192.168.64.3:56747->192.168.64.1:53: read: connection refused
  Warning  Failed     27s                kubelet, minikube  Failed to pull image "k8s.gcr.io/echoserver:1.10": rpc error: code = Unknown desc = Error response from daemon: Get https://k8s.gcr.io/v2/: dial tcp: lookup k8s.gcr.io on 192.168.64.1:53: read udp 192.168.64.3:48279->192.168.64.1:53: read: connection refused
  Normal   BackOff    16s (x2 over 42s)  kubelet, minikube  Back-off pulling image "k8s.gcr.io/echoserver:1.10"
  Warning  Failed     16s (x2 over 42s)  kubelet, minikube  Error: ImagePullBackOff
  Normal   Pulling    4s (x3 over 42s)   kubelet, minikube  Pulling image "k8s.gcr.io/echoserver:1.10"
  Warning  Failed     4s (x3 over 42s)   kubelet, minikube  Error: ErrImagePull
  Warning  Failed     4s                 kubelet, minikube  Failed to pull image "k8s.gcr.io/echoserver:1.10": rpc error: code = Unknown desc = Error response from daemon: Get https://k8s.gcr.io/v2/: dial tcp: lookup k8s.gcr.io on 192.168.64.1:53: read udp 192.168.64.3:50616->192.168.64.1:53: read: connection refused

Answer 1

可以使用以下方法解決此錯誤：

1. 通過docker-machine ls檢查是否有任何 docker 機器正在運行

2. 如果不存在機器，則使用docker-machine create <machine-name>創建一docker-machine create <machine-name>

3. 然后使用docker-machine ip <machine-name>獲取這台機器IP

4. 然后首先使用minikube delete刪除任何現有的 minikube 集群，然后使用minikube start --vm-driver="virtualbox" --insecure-registry="docker-machine IP":80

5. 然后運行kubectl create deployment hello-minikube --image=k8s.gcr.io/echoserver:1.10並檢查日志，它會顯示成功拉取圖像。

Answer 2

從事件來看，調用192.168.64.1:53的 DNS 服務器來解析 k8s.gcr.io 似乎失敗了。 檢查是否有在該 IP 上運行的 DNS 服務器。 它可以在 minikube 主機上的/etc/resolv.conf （如果是 Linux）中配置。