GitHub Actions 实现 Azure Infra 资源的自动化部署

思路浅析

　　使用 Terraform Code 部署 Azure 基础设施资源是特别受欢迎的，我曾经有写文章分享过利用 Azure DevOps 自动部署 Terraform Code 所描述的 Azure 基础设施资源。但是有些人对于Azure DevOps 可能比较陌生，再加上 Azure DevOps 的 Parallel jobs 付费作业。所以作为替代方案，今天给大家分享如何使用 GitHub Actions 部署 Terraform Code。

配置 Azure Service Principal 的凭据到 GitHub 机密库

Terraform Code 以及Azure CLI 会使用 Azure Service Principle 对 Azure 进行身份认证

关于 Azure Service Principle 的创建大家可以参考：

https://www.cnblogs.com/AllenMaster/p/13065643.html

接下来需要添加以下机密信息

　　1）AZURE_AD_CLIENT_ID

　　2）AZURE_AD_CLIENT_SECRET

　　3）AZURE_AD_TENANT_ID

　　4）AZURE_SUBSCRIPTION_ID

　　5）AZURE_CREDENTIALS

其中 AZURE_CREDENTIALS 格式内容如下所示：

{
    "clientId": "XXXX",
    "clientSecret": "XXXX",
    "subscriptionId": "XXXX",
    "tenantId": "XXXX"
  }

将上述信息存储到对应名称的 GitHub Secrets。

配置 workflows run 的 yaml

在 Terraform 项目根目录创建 terraform.yaml 并保存在以下目录

terraform.yaml 内容如下

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name: " using GitHub Action for Terraform Auto CI/CD"
on:
  pull_request:
    branches:
      - remote_stats
  push:
    branches:
      - remote_stats
env:
  tf_version: "latest"
  tf_working_dir: "./src/model/"
  terraform_rg: "Web_Test_TF_RG"
  storage_account: "cnbatestorestatefile004"
  storage_account_container: "terraform-state"
  key: "cnbate.terraform.stats"
jobs:
  terraform_auto_deploy:
    name: "Azure CLI Action (secrect created)"
    env:
      ARM_CLIENT_ID: ${{ secrets.AZURE_AD_CLIENT_ID }}
      ARM_CLIENT_SECRET: ${{ secrets.AZURE_AD_CLIENT_SECRET }}
      ARM_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
      ARM_TENANT_ID: ${{ secrets.AZURE_AD_TENANT_ID }}
    runs-on: ubuntu-latest
    environment: production
 
    # Use the Bash shell regardless whether the GitHub Actions runner is ubuntu-latest, macos-latest, or windows-latest
    defaults:
      run:
        shell: bash
    steps:
      - name: "Checkout"
        uses: actions/checkout@master
      - name: Azure Login
        uses: azure/login@v1
        with:
          creds: ${{ secrets.AZURE_CREDENTIALS }}
          enable-AzPSSession: false
          environment: azurecloud
          allow-no-subscriptions: false
      - name: Azure CLI script
        uses: azure/CLI@v1
        with:
          creds: ${{ secrets.AZURE_CREDENTIALS }}
          enable-AzPSSession: false
          environment: azurecloud
          allow-no-subscriptions: false
          azcliversion: 2.30.0
          inlineScript: |
 
            # create azure resource group
            az group create --location eastasia --name ${{ env.terraform_rg }}
 
            # create azure storage account
            az storage account create --name ${{ env.storage_account }} --resource-group ${{ env.terraform_rg }} --location eastasia --sku Standard_LRS
 
            # create storage account container for tf state 
            az storage container create --name ${{ env.storage_account_container }} --account-name ${{ env.storage_account }}
 
            # query storage key and set variable
            export ARM_ACCESS_KEY=$(az storage account keys list --resource-group ${{env.terraform_rg}} --account-name ${{ env.storage_account }} --query "[?keyName == 'key1'][value]" --output tsv)
 
            echo $ARM_ACCESS_KEY
 
      - name: "Terraform init azurerm backend"
        uses: ahmedig/terraform-azurerm-backend@v1
        with:
          azure_credentials: ${{ secrets.AZURE_CREDENTIALS }}
          resource_group_name: ${{ env.terraform_rg }}
          container_name: ${{ env.storage_account_container }} 
          storage_account_name: ${{ env.storage_account }}
          file_name: ${{ env.key }}
          subscription_id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
          tf_working_directory: ${{ env.tf_working_dir }}
 
      - name: "Terraform Validate"
        uses: hashicorp/terraform-github-actions@master
        with:
          tf_actions_version: ${{ env.tf_version }}
          tf_actions_subcommand: 'validate'
          tf_actions_working_dir: ${{ env.tf_working_dir }}
        env:
          GITHUB_TOKEN: ${{ secrets.AZURE_CREDENTIALS }}
 
      - name: "Terraform Plan"
        uses: hashicorp/terraform-github-actions@master
        with:
          tf_actions_version: ${{ env.tf_version }}
          tf_actions_subcommand: 'plan'
          tf_actions_working_dir: ${{ env.tf_working_dir }}
        env:
          GITHUB_TOKEN: ${{ secrets.AZURE_CREDENTIALS }}
 
      - name: "Terraform Deploy"
        uses: hashicorp/terraform-github-actions@master
        with:
          tf_actions_version: ${{ env.tf_version }}
          tf_actions_subcommand: 'apply'
          tf_actions_working_dir: ${{ env.tf_working_dir }}
        env:
          GITHUB_TOKEN: ${{ secrets.AZURE_CREDENTIALS }}
 
      - name: "Terraform Destroy"
        uses: hashicorp/terraform-github-actions@master
        with:
          tf_actions_version: ${{ env.tf_version }}
          tf_actions_subcommand: 'destroy'
          tf_actions_working_dir: ${{ env.tf_working_dir }}
        env:
          GITHUB_TOKEN: ${{ secrets.AZURE_CREDENTIALS }}

3，运行 workflows run

由于我们在 "terraform.yaml" 中指定指定工作分支 “remote_stats”，当 “remote” 分支发生 “push” 或者 “pull_request” 操作就会触发 GitHub Actions 的 workflows 的运行。所以我们直接推送当前已编辑好的 "terraform.yaml" 文件到 “remote_stats” 分支，并在 GitHub 上查看 workflows 运行结果。

如果需要进一步了解每个步骤都执行了那些操作，可以选择当前 workflow runs