github-actions.yml

name: CI/CD with github actions & docker

on:
  push:
    branches: [ "develop", "main" ]

jobs:
  build-and-deploy:
    name: Build
    runs-on: ubuntu-latest
    strategy:
      matrix:
        service:
          - name: "eureka"
            folder: "com.bkmarriott.eureka"
          - name: "gateway"
            folder: "com.bkmarriott.gateway"
          - name: "auth"
            folder: "com.bkmarriott.auth"
          - name: "coupon"
            folder: "com.bkmarriott.coupon"
          - name: "charge"
            folder: "com.bkmarriott.charge"
          - name: "promotion"
            folder: "com.bkmarriott.promotion"
          - name: "hotel"
            folder: "com.bkmarriott.hotel"
          - name: "reservation"
            folder: "com.bkmarriott.reservation"
          - name: "payment"
            folder: "com.bkmarriott.payment"

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Detect Changed Services
        id: detect_changes
        run: |
          CHANGED_FILES=$(git diff --name-only HEAD^ HEAD)
          echo "Changed files: $CHANGED_FILES"
          
          SERVICES_TO_BUILD=""

          for CHANGED_FILE in $CHANGED_FILES; do
            FOLDER=$(echo "$CHANGED_FILE" | sed 's/\/.*//')
          
            if [[ ! "$SERVICES_TO_BUILD" =~ "$FOLDER" ]]; then
            SERVICES_TO_BUILD="$SERVICES_TO_BUILD $FOLDER"
            fi
          done
          
          echo "Folders to build: $SERVICES_TO_BUILD"
          echo "services_to_build=$SERVICES_TO_BUILD" >> $GITHUB_ENV

      - name: Skip Unchanged Services
        if: ${{ !contains(env.services_to_build, matrix.service.folder) }}
        run: |
          echo "Skipping service: ${{ matrix.service.name }}"
          exit 0

      - name: Set up JDK 17
        if: ${{ contains(env.services_to_build, matrix.service.folder) }}
        uses: actions/setup-java@v4
        with:
          java-version: '17'
          distribution: 'temurin'

      - name: Inject application.yml
        if: ${{ contains(env.services_to_build, matrix.service.folder) }}
        run: |
          if [ "${{ matrix.service.name }}" == "eureka" ]; then
            echo "${{ secrets.EUREKA_SERVER_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          elif [ "${{ matrix.service.name }}" == "auth" ]; then
            echo "${{ secrets.AUTH_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          elif [ "${{ matrix.service.name }}" == "charge" ]; then
            echo "${{ secrets.CHARGE_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          elif [ "${{ matrix.service.name }}" == "coupon" ]; then
            echo "${{ secrets.COUPON_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          elif [ "${{ matrix.service.name }}" == "gateway" ]; then
            echo "${{ secrets.GATEWAY_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          elif [ "${{ matrix.service.name }}" == "hotel" ]; then
            echo "${{ secrets.HOTEL_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          elif [ "${{ matrix.service.name }}" == "promotion" ]; then
            echo "${{ secrets.PROMOTION_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          elif [ "${{ matrix.service.name }}" == "reservation" ]; then
            echo "${{ secrets.RESERVATION_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          elif [ "${{ matrix.service.name }}" == "payment" ]; then
            echo "${{ secrets.PAYMENT_APPLICATION_DEV_YML }}" > ${{ matrix.service.folder }}/src/main/resources/application-dev.yml
          fi

      - name: Build with Gradle
        if: ${{ contains(env.services_to_build, matrix.service.folder) }}
        run: |
          cd ${{ matrix.service.folder }}
          chmod +x gradlew
          ./gradlew clean 
          ./gradlew build -x test --no-daemon

      - name: Build Docker Image
        if: ${{ contains(env.services_to_build, matrix.service.folder) }}
        env:
          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
        run: |
          cd ${{ matrix.service.folder }}
          docker buildx build -t $DOCKER_USERNAME/bkmarriott-${{ matrix.service.name }}:latest .

      - name: Push Docker Image
        if: ${{ contains(env.services_to_build, matrix.service.folder) }}
        env:
          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
        run: |
          echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
          docker push $DOCKER_USERNAME/bkmarriott-${{ matrix.service.name }}:latest

      - name: Deploy Docker Image to EC2
        if: ${{ contains(env.services_to_build, matrix.service.folder) }}
        env:
          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
          EC2_SSH_PRIVATE_KEY: ${{ secrets.EC2_SSH_PRIVATE_KEY }}
          EC2_INSTANCE_IP: ${{ secrets.EC2_INSTANCE_IP }}
          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
        run: |
          # Set up SSH Key for EC2 instance
          echo "$EC2_SSH_PRIVATE_KEY" > private_key.pem
          chmod 600 private_key.pem
          
          case ${{ matrix.service.name }} in
            "eureka")
              SERVICE_PORT=${{ secrets.EUREKA_PORT }}
            ;;
            "gateway")
              SERVICE_PORT=${{ secrets.GATEWAY_PORT }}
            ;;
            "auth")
              SERVICE_PORT=${{ secrets.AUTH_PORT }}
            ;;
            "coupon")
              SERVICE_PORT=${{ secrets.COUPON_PORT }}
            ;;
            "charge")
              SERVICE_PORT=${{ secrets.CHARGE_PORT }}
            ;;
            "promotion")
              SERVICE_PORT=${{ secrets.PROMOTION_PORT }}
            ;;
            "hotel")
              SERVICE_PORT=${{ secrets.HOTEL_PORT }}
            ;;
            "reservation")
              SERVICE_PORT=${{ secrets.RESERVATION_PORT }}
            ;;
            "payment")
                SERVICE_PORT=${{ secrets.PAYMENT_PORT }}
            ;;
          esac
          
          # SSH into EC2 and debug Docker variables
          ssh -i private_key.pem -o StrictHostKeyChecking=no ubuntu@$EC2_INSTANCE_IP << EOF
            echo "Using Docker image: $DOCKER_USERNAME/bkmarriott-${{ matrix.service.name }}:latest"
            echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
            sudo docker stop ${{ matrix.service.name }}
            sudo docker rm ${{ matrix.service.name }}
            sudo docker pull $DOCKER_USERNAME/bkmarriott-${{ matrix.service.name }}:latest
            sudo docker run -d --name ${{ matrix.service.name }} -p $SERVICE_PORT:$SERVICE_PORT $DOCKER_USERNAME/bkmarriott-${{ matrix.service.name }}:latest
          EOF