macos - kubectl 从本地 docker 镜像运行？

Question

如何引用存在的本地镜像？

kubectl run u --rm -i --tty --image my_local_image -- bash

结果 ImagePullBackOff和 kubectl显然是试图从远程存储库而不是本地寄存器中提取。

此 answer没有帮助，后续指的是 minikube 和 kubernetes。

一些事件日志

Events:
  Type     Reason                 Age               From                         Message
  ----     ------                 ----              ----                         -------
  Normal   Scheduled              1m                default-scheduler            Successfully assigned u-6988b9c446-zcp99 to docker-for-desktop
  Normal   SuccessfulMountVolume  1m                kubelet, docker-for-desktop  MountVolume.SetUp succeeded for volume "default-token-q2qm7"
  Normal   SandboxChanged         1m                kubelet, docker-for-desktop  Pod sandbox changed, it will be killed and re-created.
  Normal   Pulling                23s (x3 over 1m)  kubelet, docker-for-desktop  pulling image "centos_postgres"
  Warning  Failed                 22s (x3 over 1m)  kubelet, docker-for-desktop  Failed to pull image "centos_postgres": rpc error: code = Unknown desc = Error response from daemon: pull access denied for centos_postgres, repository does not exist or may require 'docker login'
  Warning  Failed                 22s (x3 over 1m)  kubelet, docker-for-desktop  Error: ErrImagePull
  Normal   BackOff                9s (x5 over 1m)   kubelet, docker-for-desktop  Back-off pulling image "centos_postgres"
  Warning  Failed                 9s (x5 over 1m)   kubelet, docker-for-desktop  Error: ImagePullBackOff

Answer 1

Kubernetes Pod 有一个 imagePullPolicy field 。如果您将其设置为 Never ，它永远不会尝试拉取镜像，由您来确保 kubelet 使用的 docker 守护进程包含该镜像。默认策略是 IfNotPresent , 应该和 Never 一样工作如果图像已经存在于 docker 守护进程中。仔细检查您的 docker 守护进程是否确实包含您认为它包含的内容，并确保您的 imagePullPolicy设置为我提到的两个之一。

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
    - name: my-image
      image: local-image-name
      imagePullPolicy: Never