Github Action을 이용한 CI/CD 파이프라인 구축

Docker와 github Action을 이용해서 구현했습니다.

1. 프로젝트에 github-action workflow 작성할 yml 파일 생성

• .github/workflows 폴더 안에 위치해야 합니다.

name: CI/CD

on:
  push:
    branches: ["dev"] # dev 브랜치에 push 했을경우
  pull_request:
    types: [closed] # pull_request closed 됐을 경우
  workflow_dispatch: # 수동 실행 가능

jobs:
  build:
    runs-on: ubuntu-latest # OS 환경
    #if: github.event.pull_request.merged == true && github.event.pull_request.base.ref == 'dev'
    # pull_request가 dev 브랜치에 merge 됐을 경우

    steps:
      - name: Checkout
        uses: actions/checkout@v2 # 코드 check out

      - name: Set up JDK 17
        uses: actions/setup-java@v3
        with:
          java-version: 17 # 자바 설치
          distribution: 'adopt'

      - name: Set Environment
        uses: microsoft/variable-substitution@v1
        with:
          files: ./src/main/resources/application.yml
        env:
          spring.datasource.username: ${{ secrets.DB_USERNAME }}
          spring.datasource.url: ${{ secrets.DB_URL }}
          spring.datasource.password: ${{ secrets.DB_PASSWORD }}
          jwt.token.secret: ${{ secrets.JWT_TOKEN_SECRET }}
          spring.mail.username: ${{ secrets.MAIL_USERNAME }}
          spring.mail.password: ${{ secrets.MAIL_PASSWORD }}
          oauth2.kakao.client-id: ${{ secrets.KAKAO_CLIENT_ID }}
          oauth2.kakao.redirect-uri: ${{ secrets.KAKAO_REDIRECT_URI }}
          oauth2.kakao.info-url: ${{ secrets.KAKAO_INFO_URL }}
          oauth2.kakao.base-url: ${{ secrets.KAKAO_BASE_URL }}
          spring.redis.host: ${{ secrets.REDIS_HOST }}
          spring.redis.port: ${{ secrets.REDIS_PORT }}
          spring.redis.password: ${{ secrets.REDIS_PASSWORD }}
          coolsms.api.key: ${{ secrets.COOLSMS_API_KEY }}
          coolsms.api.secret: ${{ secrets.COOLSMS_API_SECRET }}
          coolsms.senderNumber: ${{ secrets.COOLSMS_SENDER_NUMBER }}

      - name: Grant execute permission for gradlew
        run: chmod +x ./gradlew
        shell: bash # (6).권한 부여

      - name: Build with Gradle
        run: ./gradlew clean build -x test
        shell: bash # (7).build 시작

      - name: Get current time
        uses: 1466587594/get-current-time@v2
        id: current-time
        with:
          format: YYYY-MM-DDTHH-mm-ss
          utcOffset: "+09:00"

      - name: Show Current Time
        run: echo "CurrentTime=$"
        shell: bash

      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Docker build
        run: |
          docker build -t ${{ secrets.PROJECT_NAME }} .
          docker tag ${{ secrets.PROJECT_NAME }} ${{ secrets.DOCKER_HUB_REPO }}:${GITHUB_SHA::7}
          docker push ${{ secrets.DOCKER_HUB_REPO }}:${GITHUB_SHA::7}

      - name: Deploy
        uses: appleboy/ssh-action@master
        with:
          host: ${{ secrets.EC2_SERVER_HOST }}
          username: ubuntu
          key: ${{ secrets.PRIVATE_KEY }}
          envs: GITHUB_SHA
          script: |
            docker rmi $(docker images -q)
            docker pull ${{ secrets.DOCKER_HUB_REPO }}:${GITHUB_SHA::7}
            docker tag ${{ secrets.DOCKER_HUB_REPO }}:${GITHUB_SHA::7} ${{ secrets.PROJECT_NAME }}
            docker stop ${{ secrets.PROJECT_NAME }}
            docker rm ${{ secrets.PROJECT_NAME }}
            docker run -d --name ${{ secrets.PROJECT_NAME }} -p 80:8080 ${{ secrets.PROJECT_NAME }}

2. Dockerfile 생성

FROM openjdk:17
ARG JAR_FILE=build/libs/*.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

3. 환경변수 설정

• secrets.이 붙은 변수들은 github Settings에서 Secrets and Variables의 Actions에 Repository Secrets에 모두 등록해줘야 합니다.
  

4. ec2에 docker 설치 및 docker container가 잘 동작하는지 확인하기

sudo apt update
sudo apt install apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
sudo apt update
sudo apt install docker-ce

도커 설치 확인

이제 프로젝트를 github에 pr하거나 dev에 merge하면 자동으로 docker container가 실행됩니다.