azure-staging-build-deploy.yml

name: Azure Staging - Build and Deploy

# **What it does**: Builds and deploys a branch/PR to staging
# **Why we have it**: To enable us to deploy a branch/PR to staging whenever necessary
# **Who does it impact**: All contributors.

on:
  workflow_dispatch:
    inputs:
      PR_NUMBER:
        description: 'PR Number'
        type: string
        required: true
      COMMIT_REF:
        description: 'The commit SHA to build'
        type: string
        required: true

permissions:
  contents: read
  deployments: write

# This allows a subsequently queued workflow run to take priority over
# previously queued runs but NOT interrupt currently executing runs
concurrency:
  group: 'staging-env @ ${{ github.head_ref || github.run_id }} for ${{ github.event.number || github.event.inputs.PR_NUMBER }}'
  cancel-in-progress: true

jobs:
  azure-staging-build-and-deploy:
    if: ${{ github.repository == 'github/docs-internal' }}
    runs-on: ubuntu-latest
    timeout-minutes: 20
    environment:
      # TODO: Update name and url to point to a specific slot for the branch/PR
      name: staging-env
      url: ${{ env.APP_URL }}
    env:
      PR_NUMBER: ${{ github.event.number || github.event.inputs.PR_NUMBER || github.run_id }}
      COMMIT_REF: ${{ github.event.pull_request.head.sha || github.event.inputs.COMMIT_REF }}
      IMAGE_REPO: ${{ github.repository }}/pr-${{ github.event.number || github.event.inputs.PR_NUMBER || github.run_id }}
      RESOURCE_GROUP_NAME: docs-staging
      APP_SERVICE_NAME: ghdocs-staging
      SLOT_NAME: canary

    steps:
      - name: 'Az CLI login'
        uses: azure/login@1f63701bf3e6892515f1b7ce2d2bf1708b46beaf
        with:
          creds: ${{ secrets.PROD_AZURE_CREDENTIALS }}

      - name: 'Docker login'
        uses: azure/docker-login@81744f9799e7eaa418697cb168452a2882ae844a
        with:
          login-server: ${{ secrets.NONPROD_REGISTRY_SERVER }}
          username: ${{ secrets.NONPROD_REGISTRY_USERNAME }}
          password: ${{ secrets.NONPROD_REGISTRY_PASSWORD }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@94ab11c41e45d028884a99163086648e898eed25

      - name: Check out repo
        uses: actions/checkout@dcd71f646680f2efd8db4afa5ad64fdcba30e748
        with:
          ref: ${{ env.COMMIT_REF }}
          # To prevent issues with cloning early access content later
          persist-credentials: 'false'
          lfs: 'true'

      - name: Check out LFS objects
        run: git lfs checkout

      - name: 'Set env vars'
        run: |
          # Set APP_URL
          echo "APP_URL=${{ secrets.STAGING_APP_URL }}" >> $GITHUB_ENV
          # Image tag is unique to each workflow run so that it always triggers a new deployment
          echo "DOCKER_IMAGE=${{ secrets.NONPROD_REGISTRY_SERVER }}/${{ env.IMAGE_REPO }}:${{ env.COMMIT_REF }}-${{ github.run_number }}-${{ github.run_attempt }}" >> $GITHUB_ENV

      - name: Setup node
        uses: actions/setup-node@17f8bd926464a1afa4c6a11669539e9c1ba77048
        with:
          node-version: '16.15.0'
          cache: npm

      - name: Clone docs-early-access
        uses: actions/checkout@dcd71f646680f2efd8db4afa5ad64fdcba30e748
        with:
          repository: github/docs-early-access
          token: ${{ secrets.DOCUBOT_REPO_PAT }}
          path: docs-early-access
          ref: main

      - name: Merge docs-early-access repo's folders
        run: .github/actions-scripts/merge-early-access.sh

      - name: 'Build and push image'
        uses: docker/build-push-action@1cb9d22b932e4832bb29793b7777ec860fc1cde0
        with:
          context: .
          push: true
          target: production
          tags: ${{ env.DOCKER_IMAGE }}
          build-args: |
            BUILD_SHA=${{ env.COMMIT_REF }}

      - name: 'Update docker-compose.staging.yaml template file'
        run: |
          sed 's|#{IMAGE}#|${{ env.DOCKER_IMAGE }}|g' docker-compose.staging.tmpl.yaml > docker-compose.staging.yaml

      - name: 'Apply updated docker-compose.staging.yaml config to deployment slot'
        run: |
          az webapp config container set --multicontainer-config-type COMPOSE --multicontainer-config-file docker-compose.staging.yaml --slot ${{ env.SLOT_NAME }} -n ${{ env.APP_SERVICE_NAME }} -g ${{ env.RESOURCE_GROUP_NAME }}

      # Watch deployment slot instances to see when all the instances are ready
      - name: Check that deployment slot is ready
        uses: actions/github-script@2b34a689ec86a68d8ab9478298f91d5401337b7d
        env:
          CHECK_INTERVAL: 10000
        with:
          script: |
            const { execSync } = require('child_process')

            const slotName = process.env.SLOT_NAME
            const appServiceName = process.env.APP_SERVICE_NAME
            const resourceGroupName = process.env.RESOURCE_GROUP_NAME

            const getStatesForSlot = (slot, appService, resourceGroup) => {
              return JSON.parse(
                execSync(
                  `az webapp list-instances --slot ${slot} --query "[].state" -n ${appService} -g ${resourceGroup}`,
                  { encoding: 'utf8' }
                )
              )
            }

            let hasStopped = false
            const waitDuration = parseInt(process.env.CHECK_INTERVAL, 10) || 10000
            async function doCheck() {
              const states = getStatesForSlot(slotName, appServiceName, resourceGroupName)
              console.log(`Instance states:`, states)

              // We must wait until at-least 1 instance has STOPPED to know we're looking at the "next" deployment and not the "previous" one
              // That way we don't immediately succeed just because all the previous instances were READY
              if (!hasStopped) {
                hasStopped = states.some((s) => s === 'STOPPED')
              }

              const isAllReady = states.every((s) => s === 'READY')

              if (hasStopped && isAllReady) {
                process.exit(0) // success
              }

              console.log(`checking again in ${waitDuration}ms`)
              setTimeout(doCheck, waitDuration)
            }

            doCheck()

      - name: 'Swap deployment slot to production'
        run: |
          az webapp deployment slot swap --slot ${{ env.SLOT_NAME }} --target-slot production -n ${{ env.APP_SERVICE_NAME }} -g ${{ env.RESOURCE_GROUP_NAME }}