Feat: CD

Author: lunarbae628

.github/workflows/cd.yml

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+name: CD - Deploy Backend
+
+on:
+  workflow_run:
+    workflows: ["CI - Build & Push Backend"]
+    types: [completed]
+    branches: [release]
+
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Deploy image tag (default: release)"
+        required: false
+        default: "release"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: deploy-docsa
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
+    runs-on: ubuntu-latest
+    environment: production
+    steps:
+      - name: Decide tag
+        id: tag
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            echo "value=${{ github.event.inputs.tag }}" >> $GITHUB_OUTPUT
+          else
+            echo "value=release" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Deploy via SSH
+        uses: appleboy/[email protected]
+        with:
+          host: ${{ secrets.CD_HOST }}
+          username: ${{ secrets.CD_USER }}
+          key: ${{ secrets.CD_SSH_KEY }}
+          port: ${{ secrets.CD_PORT }}
+          script: |
+            export DEPLOY_TAG='${{ steps.tag.outputs.value }}'
+            bash -lc '/srv/docsa/infra/deploy.sh'

infra/deploy.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+cd /srv/docsa/infra
+
+# 특정 태그로 배포시 DEPLOY_TAG=...
+IMAGE_BASE="ghcr.io/prgrms-web-devcourse-final-project/docsa-backend"
+TAG="${DEPLOY_TAG:-}"      # 비어있으면 compose에 적힌 태그 사용
+OVR=""
+if [[ -n "$TAG" ]]; then
+  OVR="docker-compose.override.deploy.yml"
+  cat > "$OVR" <<EOF
+services:
+  app:
+    image: ${IMAGE_BASE}:${TAG}
+EOF
+fi
+
+FILES=(-f docker-compose.yml)
+[[ -n "$OVR" ]] && FILES+=(-f "$OVR")
+
+# 최신 이미지 받고 교체
+docker compose "${FILES[@]}" pull app
+docker compose "${FILES[@]}" up -d app
+
+# 헬스체크 대기 (최대 120s)
+echo -n "Waiting for app (docsa-app) to be healthy"
+ok=0
+for i in {1..60}; do
+  status="$(docker inspect -f '{{.State.Health.Status}}' docsa-app 2>/dev/null || echo none)"
+  if [[ "$status" == "healthy" ]]; then ok=1; echo -e "\nApp healthy"; break; fi
+  sleep 2; echo -n "."
+done
+
+# 임시 override 제거 & 청소
+[[ -n "$OVR" ]] && rm -f "$OVR"
+docker image prune -f >/dev/null 2>&1 || true
+
+# 실패 처리
+if [[ $ok -eq 0 ]]; then
+  echo -e "\nApp failed to become healthy (status=$status)"
+  docker logs --tail=200 docsa-app || true
+  exit 1
+fi