经常k8s.gcr.io ,quay.io之类的国外镜像拉取不过来，那怎么办呢？

本文安利一种使用github action拉取镜像推送到Dockerhub的方法。推送好了之后，自己拉取镜像retag一下就能用了

编译kubernetes源码需要好几个国外镜像，我的构建服务器根本连不上k8s.gcr.io, -_-!!!

比如我现在要拉取的镜像叫做k8s.gcr.io/build-image/kube-cross:v1.21.0-go1.16.15-buster.0.

1. 创建一个Github仓库

创建一个github仓库，并初始化Action.

2. 创建DockerHub Secret

一定要用Repository Secret类型，上面的Environment Secret是我建错了，根本不好使！！

3. 编写你的ci yaml文件为

底下的代码都有注释，大概思路就是

1. 让github的服务器拉取k8s.gcr.io的镜像
2. 登录你的dockerhub账户
3. 重新tag一下拉取的镜像为你仓库的tag
4. 推送到dockerhub

# This is a basic workflow to help you get started with Actions

name: CI

# Controls when the workflow will run
on:
  # Triggers the workflow on push or pull request events but only for the "main" branch
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v3

      # Runs a set of commands using the runners shell
      - name: Run a multi-line script
        run: |
          docker pull k8s.gcr.io/build-image/kube-cross:v1.21.0-go1.16.15-buster.0
          docker tag k8s.gcr.io/build-image/kube-cross:v1.21.0-go1.16.15-buster.0 oneslide/k8s.gcr.io:kube-cross-v1.21.0-go1.16.15-buster.0
      
      - name: Log in to Docker Hub
        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
      
      # Runs a set of commands using the runners shell
      - name: Push to Docker Registry
        run: |
          docker push oneslide/k8s.gcr.io:kube-cross-v1.21.0-go1.16.15-buster.0

4. 观察gitlab CI输出

Reference List

1. https://docs.github.com/en/actions/publishing-packages/publishing-docker-images