main.yml

name: Build and Deploy to EC2

# 워크플로우가 언제 실행될 것인지 조건 명시
on:
  push:
    branches: [ "main"]

# AWS 관련 값 변수로 설정
env:
  AWS_REGION: ap-northeast-2
  AWS_S3_BUCKET: wagu-book-gitget-deploy-bucket
  AWS_CODE_DEPLOY_APPLICATION: WAGU-Book-Application-CD
  AWS_CODE_DEPLOY_GROUP: WAGU-Book-Deployment-Group

jobs:
  deploy:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4
      
      # 1. java 17 세팅
      - name: Set up JDK 17
        uses: actions/setup-java@v4
        with:
          java-version: '17'
          distribution: 'temurin'

      # 2. Spring Boot 애플리케이션 빌드
      - name: Build with Gradle
        uses: gradle/gradle-build-action@v3
        with:
          arguments: clean bootJar
  
      # 3. Docker 이미지 빌드
      - name: docker image build
        run: docker build -t ${{ secrets.DOCKERHUB_USERNAME }}/github-actions-demo .
  
      # 4. DockerHub 로그인
      - name: docker login
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}
  
      # 5. Docker Hub 이미지 푸시
      - name: docker Hub push
        run: docker push ${{ secrets.DOCKERHUB_USERNAME }}/github-actions-demo
        
  # 위 과정에서 푸시한 이미지를 ec2에서 풀받아서 실행시키는 과정 
  run-docker-image-on-ec2:
    # deploy (위)과정이 완료되어야 실행됩니다.
    needs: deploy
    runs-on: ubuntu-latest
  
    steps:
      # 0. aws cli에 접근
      - name: Set up AWS CLI
        uses: aws-actions/configure-aws-credentials@v4
        with:
          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
          aws-region: ${{ env.AWS_REGION }}

      - name: SSH to EC2 and deploy
        uses: appleboy/ssh-action@master
        with:
          host: ${{ secrets.EC2_HOST }}     # 아이피
          username: ${{ secrets.EC2_USER }} # 접속할 대상
          key: ${{ secrets.EC2_SSH_PRIVATE_KEY }}   # private key
          script: |
            sudo docker login -u ${{ secrets.DOCKERHUB_USERNAME }} -p ${{ secrets.DOCKERHUB_PASSWORD }}
            sudo docker pull ${{ secrets.DOCKERHUB_USERNAME }}/github-actions-demo
            sudo docker stop github-actions-demo
            sudo docker run --name github-actions-demo --rm --env-file ./.env -p 8080:8080 -d ${{ secrets.DOCKERHUB_USERNAME }}/github-actions-demo
            sudo docker system prune -f
            
            # # 블루-그린 배포를 위한 컨테이너 실행
            # if [ $(docker ps -q -f name=github-actions-demo-green) ]; then
            #   # 그린 컨테이너가 실행 중인 경우, 블루 컨테이너로 새 버전 실행
            #   docker run -d --name github-actions-demo-blue --rm --env-file ./.env_blue -p 8080:8080 ${{ secrets.DOCKERHUB_USERNAME }}/github-actions-demo
            #   NEW_CONTAINER=github-actions-demo-blue
            #   OLD_CONTAINER=github-actions-demo-green
            #   NEW_PORT=8080
            #   OLD_PORT=8081
            # else
            #   # 블루 컨테이너가 실행 중인 경우, 그린 컨테이너로 새 버전 실행
            #   docker run -d --name github-actions-demo-green --rm --env-file ./.env_green -p 8081:8081 ${{ secrets.DOCKERHUB_USERNAME }}/github-actions-demo
            #   NEW_CONTAINER=github-actions-demo-green
            #   OLD_CONTAINER=github-actions-demo-blue
            #   NEW_PORT=8081
            #   OLD_PORT=8080
            # fi

            # sleep 30

            # # 잘 동작하면 로드밸런서 변경
            # if curl -s http://localhost:$NEW_PORT > /dev/null; then
            #   aws elbv2 register-targets --target-group-arn "arn:aws:elasticloadbalancing:ap-northeast-2:767398017748:targetgroup/wagu-book-lb-tg/cbd583c7310ea316" --targets Id=i-09037c296cda9b574,Port=$NEW_PORT
            #   aws elbv2 deregister-targets --target-group-arn "arn:aws:elasticloadbalancing:ap-northeast-2:767398017748:targetgroup/wagu-book-lb-tg/cbd583c7310ea316" --targets Id=i-09037c296cda9b574,Port=$OLD_PORT
            #   docker stop $OLD_CONTAINER || true
            #   exit 0
            # else
            #   docker stop $NEW_CONTAINER || true
            #   echo "새 애플리케이션이 실행되지 않음"
            #   exit 1
            # fi
            # sudo docker system prune -f



#
#      # 1. 최신 이미지를 풀받습니다
#      - name: docker pull
#        run: sudo docker pull ${{ secrets.DOCKERHUB_USERNAME }}/github-actions-demo
#
#      # 2. 기존의 컨테이너를 중지시킵니다
#      - name: docker stop container
#        run: sudo docker stop github-actions-demo
#
#      # 3. MySQL 재실행
#      - name: docker run mysql
#        run: sudo docker start mysql-container
#
#      # 4. 최신 이미지를 컨테이너화하여 실행시킵니다
#      - name: docker run new container
#        run: sudo docker run --name github-actions-demo --rm --env-file ./.env -p 8080:8080 -d ${{ secrets.DOCKERHUB_USERNAME }}/github-actions-demo
#
#      # 5. 미사용 이미지를 정리합니다
#      - name: delete old docker image
#        run: sudo docker system prune -f