build-image.yaml

name: Build Docker Image

on:
  push:
    branches:
      - master
    tags:
      - v*

env:
  REPO: ghcr.io/daocloud/kubernetes-cronhpa-controller
jobs:
  main:
    # 在 Ubuntu 上运行
    runs-on: ubuntu-latest
    steps:
      # git checkout 代码
      - name: Checkout
        uses: actions/checkout@v2
      # 设置 QEMU, 后面 docker buildx 依赖此.
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      # 设置 Docker buildx, 方便构建 Multi platform 镜像
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      # 登录 docker hub
      - name: Login to DockerHub
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      # 通过 git 命令获取当前 tag 信息, 存入环境变量 APP_VERSION
      - name: Generate App Version
        run: echo APP_VERSION=`git describe --tags --always` >> $GITHUB_ENV
      # 构建 Docker 并推送到 Docker hub
      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          # 是否 docker push
          push: true
          # 生成多平台镜像, see https://github.com/docker-library/bashbrew/blob/v0.1.1/architecture/oci-platform.go
          platforms: |
            linux/amd64
            linux/arm64
          # docker build arg, 注入 APP_NAME/APP_VERSION
          build-args: |
            APP_VERSION=${{ env.APP_VERSION }}
          # 生成两个 docker tag: ${APP_VERSION} 和 latest
          tags: |
            ${{ env.REPO }}:latest
            ${{ env.REPO }}:${{ env.APP_VERSION }}
          file: multi_arch_Dockerfile
          github-token: ${{ secrets.GITHUB_TOKEN }}