feat: AWS EC2 배포를 위한 Dockerfile 및 SSH 기반 CD 파이프라인 작성

.github/workflows/cd.yml

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+name: CD Pipeline
+
+on:
+  push:
+    branches: [ "main" ]
+
+concurrency:
+  group: mople-production-${{ github.ref }}
+  cancel-in-progress: false
+
+permissions:
+  contents: read
+
+env:
+  AWS_REGION: ap-northeast-2
+  ECR_REPOSITORY: mople-app
+  CONTAINER_NAME: mople-app
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    outputs:
+      image: ${{ steps.build-image.outputs.image }}
+
+    steps:
+      - name: 저장소 체크아웃
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: JDK 17 설정
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+
+      - name: Gradle 설정 (캐시 포함)
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: gradlew 실행 권한 부여
+        run: chmod +x ./gradlew
+
+      - name: bootJar 빌드
+        run: ./gradlew bootJar --no-daemon -x test
+
+      - name: AWS 자격 증명 설정
+        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: ECR 로그인
+        id: ecr-login
+        uses: aws-actions/amazon-ecr-login@v2
+
+      - name: Docker 이미지 빌드 및 ECR 푸시
+        id: build-image
+        env:
+          REGISTRY: ${{ steps.ecr-login.outputs.registry }}
+          IMAGE_TAG: ${{ github.sha }}
+        run: |
+          docker build -t $REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG .
+          docker tag $REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG $REGISTRY/$ECR_REPOSITORY:latest
+          docker push $REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
+          docker push $REGISTRY/$ECR_REPOSITORY:latest
+          echo "image=$REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG" >> "$GITHUB_OUTPUT"
+
+  deploy:
+    needs: build-and-push
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: SSH로 EC2에 배포
+        uses: appleboy/ssh-action@v1
+        env:
+          IMAGE: ${{ needs.build-and-push.outputs.image }}
+          AWS_REGION: ${{ env.AWS_REGION }}
+          CONTAINER_NAME: ${{ env.CONTAINER_NAME }}
+        with:
+          host: ${{ secrets.EC2_HOST }}
+          username: ${{ secrets.EC2_USERNAME }}
+          key: ${{ secrets.EC2_SSH_KEY }}
+          envs: IMAGE,AWS_REGION,CONTAINER_NAME
+          script: |
+            set -e
+
+            CANDIDATE_NAME="${CONTAINER_NAME}_candidate"
+            CANDIDATE_PORT=18080
+
+            aws ecr get-login-password --region $AWS_REGION | docker login --username AWS --password-stdin ${IMAGE%%/*}
+            docker pull $IMAGE
+
+            PREV_IMAGE=$(docker inspect --format='{{.Config.Image}}' "$CONTAINER_NAME" 2>/dev/null || echo "none")
+            echo "현재 서비스 중인 이미지: $PREV_IMAGE (교체 실패 시 그대로 유지됨)"
+
+            docker rm -f "$CANDIDATE_NAME" 2>/dev/null || true
+            docker run -d --name "$CANDIDATE_NAME" -p 127.0.0.1:${CANDIDATE_PORT}:8080 --env-file /home/ubuntu/mople.env "$IMAGE"
+
+            READY=false
+            for i in $(seq 1 30); do
+              if curl -fs "http://localhost:${CANDIDATE_PORT}/actuator/health" | grep -q '"status":"UP"'; then
+                READY=true
+                break
+              fi
+              sleep 2
+            done
+
+            if [ "$READY" != true ]; then
+              echo "새 컨테이너 readiness 실패 — 배포 중단, 기존 컨테이너($PREV_IMAGE) 그대로 유지"
+              docker logs "$CANDIDATE_NAME" --tail 100 || true
+              docker rm -f "$CANDIDATE_NAME" || true
+              exit 1
+            fi
+
+            echo "새 컨테이너 readiness 확인 완료, 기존 컨테이너 교체 시작"
+            docker rm -f "$CANDIDATE_NAME"
+
+            ROLLBACK_NAME="${CONTAINER_NAME}_rollback"
+            docker rm -f "$ROLLBACK_NAME" 2>/dev/null || true
+            if docker inspect "$CONTAINER_NAME" >/dev/null 2>&1; then
+              docker stop "$CONTAINER_NAME" 2>/dev/null || true
+              docker rename "$CONTAINER_NAME" "$ROLLBACK_NAME"
+            fi
+
+            rollback() {
+              echo "새 컨테이너 기동/readiness 실패 — 이전 컨테이너($PREV_IMAGE)로 즉시 롤백"
+              docker rm -f "$CONTAINER_NAME" 2>/dev/null || true
+              if docker inspect "$ROLLBACK_NAME" >/dev/null 2>&1; then
+                docker rename "$ROLLBACK_NAME" "$CONTAINER_NAME"
+                docker start "$CONTAINER_NAME"
+              fi
+              exit 1
+            }
+
+            if ! docker run -d --name "$CONTAINER_NAME" --restart unless-stopped -p 8080:8080 --env-file /home/ubuntu/mople.env "$IMAGE"; then
+              rollback
+            fi
+
+            READY=false
+            for i in $(seq 1 30); do
+              if curl -fs "http://localhost:8080/actuator/health" | grep -q '"status":"UP"'; then
+                READY=true
+                break
+              fi
+              sleep 2
+            done
+
+            if [ "$READY" != true ]; then
+              docker logs "$CONTAINER_NAME" --tail 100 || true
+              rollback
+            fi
+
+            echo "배포 완료 — 이전 컨테이너 정리"
+            docker rm -f "$ROLLBACK_NAME" 2>/dev/null || true
+            docker image prune -f

Dockerfile

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+# --- 1단계 : 빌드 ---
+FROM eclipse-temurin:17-jdk-jammy AS build
+WORKDIR /app
+
+# 의존성 캐시를 위해 gradle 관련 파일 먼저 복사
+COPY gradlew build.gradle settings.gradle ./
+COPY gradle ./gradle
+RUN chmod +x ./gradlew
+RUN ./gradlew dependencies --no-daemon || true
+
+# 소스 복사 후 빌드 (테스트는 CI에서 검증되므로 스킵)
+COPY src ./src
+RUN ./gradlew bootJar --no-daemon -x test
+
+# --- 2단계 : 실행 ---
+FROM eclipse-temurin:17-jre-jammy
+WORKDIR /app
+
+# non-root 사용자로 실행
+RUN useradd -r -u 1001 appuser
+USER appuser
+
+COPY --from=build /app/build/libs/mople-0.0.1-SNAPSHOT.jar app.jar
+
+EXPOSE 8080
+ENV SPRING_PROFILES_ACTIVE=prod
+
+ENTRYPOINT ["java", "-jar", "app.jar"]