github的action提供了持续集成和持续交付的能力。

想在action流程失败时给予告警，github默认提供的方式是可以推送给邮箱。不过大部分人对于邮件的响应速度应该不会太快。所以在action step设置错误告警，则是比较方便快捷了。

默认情况下action 会扫描所有的step，错误则跳过，可以在stage 最后的step里面设置捕获错误
捕获方式：if: ${{ failure() }}

例：

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 single command using the runners shell
      - name: Run a one-line script
        run: echo Hello, world!
        
      - name: Step1
        run: |
          echo "${{ github.repository }}"
          echo "${{ github.head_ref }}"
      - name: Step2
        run: |
          go run main.go
      - name: Step3
        run: |
          echo 2222
      - name: Step4 //设置对应的告警
        if: ${{ failure() }}
        run: |
          author=$(git show -s --format=%an)
          curl --location --request POST xxxx
	

如上述代码所示，我们在Step2特意执行报错（没有main.go文件）,则Step3会跳过，最终Step4判断出错了，则执行curl（想要的告警）