DORA指标体系：衡量软件交付效能的黄金标准

SLO 达成率 = (总请求量 - 违反 SLO 的请求数) / 总请求量 × 100%

name: DORA Metrics Collection

on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Record deployment event
        env:
          DEPLOY_TIME: ${{ github.event.head_commit.timestamp }}
          COMMIT_SHA: ${{ github.sha }}
          ENVIRONMENT: production
        run: |
          # 记录部署事件到时序数据库
          # 部署频率 = 单位时间内的部署事件计数
          # 变更前置时间 = 部署时间 - 提交时间
          COMMIT_TIME=$(git log -1 --format=%ct $COMMIT_SHA)
          DEPLOY_TIMESTAMP=$(date +%s)
          LEAD_TIME=$((DEPLOY_TIMESTAMP - COMMIT_TIME))

          echo "Deployment Frequency: +1"
          echo "Lead Time for Changes: ${LEAD_TIME}s"
          echo "Commit SHA: ${COMMIT_SHA}"
          echo "Environment: ${ENVIRONMENT}"

          # 发送到指标收集端点
          curl -X POST "${{ secrets.METRICS_ENDPOINT }}/deployments" \
            -H "Content-Type: application/json" \
            -d "{
              \"commit_sha\": \"${COMMIT_SHA}\",
              \"commit_time\": ${COMMIT_TIME},
              \"deploy_time\": ${DEPLOY_TIMESTAMP},
              \"lead_time_seconds\": ${LEAD_TIME},
              \"environment\": \"${ENVIRONMENT}\",
              \"deployer\": \"${{ github.actor }}\"
            }"

name: Incident Tracking

on:
  issues:
    types: [opened, closed, labeled]

jobs:
  track-incident:
    if: contains(github.event.issue.labels.*.name, 'incident')
    runs-on: ubuntu-latest
    steps:
      - name: Record incident metrics
        env:
          ISSUE_NUMBER: ${{ github.event.issue.number }}
          ACTION: ${{ github.event.action }}
          CREATED_AT: ${{ github.event.issue.created_at }}
          CLOSED_AT: ${{ github.event.issue.closed_at }}
        run: |
          if [ "$ACTION" = "closed" ]; then
            # 计算 MTTR（GitHub 托管 runner 为 Linux，使用 GNU date 语法）
            CREATED_EPOCH=$(date -d "$CREATED_AT" +%s 2>/dev/null || echo "0")
            CLOSED_EPOCH=$(date -d "$CLOSED_AT" +%s 2>/dev/null || echo "0")

            if [ "$CREATED_EPOCH" != "0" ] && [ "$CLOSED_EPOCH" != "0" ]; then
              MTTR=$((CLOSED_EPOCH - CREATED_EPOCH))
              echo "MTTR for incident #${ISSUE_NUMBER}: ${MTTR}s"

              curl -X POST "${{ secrets.METRICS_ENDPOINT }}/incidents/close" \
                -H "Content-Type: application/json" \
                -d "{
                  \"incident_id\": \"${ISSUE_NUMBER}\",
                  \"mttr_seconds\": ${MTTR},
                  \"closed_at\": \"${CLOSED_AT}\"
                }"
            fi
          fi