CD.yml

name: CD

on:
  workflow_run:
    workflows: ["CI"]
    types:
      - completed

jobs:
  deploy:
    if: ${{ github.event.workflow_run.conclusion == 'success' }}
    runs-on: ubuntu-latest
    name: Deploy to EC2 (blue/green)

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

        # CD 배포
      - name: Deploy to remote EC2 Server
        uses: appleboy/ssh-action@master
        with:
          host: ${{ secrets.AWS_EC2_IP }}
          username: ${{ secrets.AWS_EC2_USERNAME }}
          key: ${{ secrets.AWS_EC2_KEY }}
          port: ${{ secrets.AWS_EC2_PORT }}
          script: |
            cd /home/ubuntu

            APP_NAME=${{ secrets.DOCKER_REPO }}
            IMAGE=${{ secrets.DOCKER_USERNAME }}/${{secrets.DOCKER_REPO}}

            COLOR_FILE=/home/ubuntu/deploy_color

            # 현재 색 / 다음 색/ 포트 결정
            if [ -f "$COLOR_FILE" ] && [ "$(cat $COLOR_FILE)" = "blue" ]; then
              CURRENT_COLOR=blue
              NEW_COLOR=green
              CURRENT_PORT=8080
              NEW_PORT=8081
            else
              CURRENT_COLOR=green
              NEW_COLOR=blue
              CURRENT_PORT=8081
              NEW_PORT=8080
            fi

            echo "Current color: $CURRENT_COLOR"
            echo "New color: $NEW_COLOR"

            docker pull $IMAGE

            NEW_CONTAINER_NAME=${APP_NAME}-${NEW_COLOR}
            OLD_CONTAINER_NAME=${APP_NAME}-${CURRENT_COLOR}

            # 새 컨테이너 자리에 기존 게 있으면 정리
            if [ "$(docker ps -aq -f name=$NEW_CONTAINER_NAME)" ]; then
              docker stop $NEW_CONTAINER_NAME || true
              docker rm $NEW_CONTAINER_NAME || true
            fi

            # 새 컨테이너 먼저 실행
            docker run -d \
              --name $NEW_CONTAINER_NAME \
              --env SPRING_PROFILES_ACTIVE=prod \
              --env JAVA_TOOL_OPTIONS="-Duser.timezone=Asia/Seoul" \
              --env 'MYSQL_URL=${{ secrets.MYSQL_URL }}' \
              --env MYSQL_USERNAME=${{ secrets.MYSQL_USERNAME }} \
              --env MYSQL_PASSWORD=${{ secrets.MYSQL_PASSWORD }} \
              --env JWT_SECRET=${{ secrets.JWT_SECRET }} \
              --env KAKAO_CLIENT_ID=${{ secrets.KAKAO_CLIENT_ID }} \
              --env KAKAO_CLIENT_SECRET=${{ secrets.KAKAO_CLIENT_SECRET }} \
              --env KAKAO_REDIRECT_URI=${{ secrets.KAKAO_REDIRECT_URI }} \
              --env KAKAO_CLIENT_REDIRECT_URI=${{ secrets.KAKAO_CLIENT_REDIRECT_URI }} \
              --env GEMINI_API_KEY=${{ secrets.GEMINI_API_KEY }} \
              --env GEMINI_MODEL=${{ secrets.GEMINI_MODEL }} \
              --env AWS_ACCESS_KEY=${{secrets.AWS_ACCESS_KEY}}\
              --env AWS_SECRET_KEY=${{secrets.AWS_SECRET_KEY}}\
              --env AWS_REGION=${{secrets.AWS_REGION}}\
              --env S3_BUCKET=${{secrets.S3_BUCKET}}\
              -p ${NEW_PORT}:8080 \
              $IMAGE

            HEALTH_PATH="/api/test/jwt"

            # 새 컨테이너 상태 확인
            echo "Health check for new container..."
            for i in {1..20}; do
              sleep 5
              STATUS_CODE=$(curl -s -o /dev/null -w "%{http_code}" "http://localhost:${NEW_PORT}${HEALTH_PATH}" || echo "000")
              echo "Health check status: $STATUS_CODE"

              if [ "$STATUS_CODE" = "200" ]; then
                   echo "New version is healthy!"
                   break
              fi

              if [ "$i" -eq 20 ]; then
                  echo "New version did not become healthy in time. Aborting."
                  docker logs $NEW_CONTAINER_NAME || true
                  exit 1
              fi
            done

            # 캐디 포트 전환
            echo "Switching traffic to new container..."

            sudo sed -i "s/reverse_proxy localhost:[0-9]\\+/reverse_proxy localhost:${NEW_PORT}/" /etc/caddy/Caddyfile
            sudo systemctl reload caddy

            if [ "$(docker ps -q -f name=$OLD_CONTAINER_NAME)" ]; then
              echo "Stopping old container..."
              docker stop $OLD_CONTAINER_NAME || true
              docker rm $OLD_CONTAINER_NAME || true
            fi

            docker image prune -f

            echo $NEW_COLOR > $COLOR_FILE