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DATABASE_MIGRATION.md
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212
DATABASE_MIGRATION.md
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# 数据库迁移和更新流程
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## 概述
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本项目已实现自动化的数据库迁移和初始化流程。每次容器启动时,会自动检查数据库状态并执行必要的迁移操作。
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## 更新流程
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### 场景一:只更新代码(无数据库变更)
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```
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1. 修改代码
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2. Git 提交: git commit -m "feat: 更新功能"
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3. Git 推送: git push origin main
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4. Jenkins 自动触发构建
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5. 部署到服务器
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6. 容器重启,应用新代码
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```
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**数据库**: 无需操作,数据库文件保持不变
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### 场景二:更新代码 + 数据库结构变更
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```
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1. 修改代码和 schema.prisma
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2. 创建迁移: cd backend && npm run prisma:migrate -- --name migration_name
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3. Git 提交(包含迁移文件): git commit -m "feat: 添加新功能 + 数据库迁移"
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4. Git 推送: git push origin main
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5. Jenkins 自动触发构建
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6. 部署到服务器(包含迁移文件)
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7. 容器启动时自动执行迁移
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```
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## 数据库迁移机制
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### 容器启动流程
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当后端容器启动时,`entrypoint.sh` 脚本会自动执行以下步骤:
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1. **生成 Prisma Client**
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```bash
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npx prisma generate
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```
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2. **检查数据库状态**
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- 如果数据库不存在 → 执行初始化
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- 执行 `prisma migrate deploy`(应用所有迁移)
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- 执行 `prisma seed`(填充初始数据)
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- 如果数据库已存在 → 只执行迁移
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- 执行 `prisma migrate deploy`(应用新的迁移)
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3. **启动应用**
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```bash
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node dist/index.js
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```
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### 迁移文件管理
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- **迁移文件位置**: `backend/prisma/migrations/`
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- **必须提交到 Git**: 所有迁移文件都需要版本控制
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- **自动应用**: 容器启动时自动应用所有未应用的迁移
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### 开发环境 vs 生产环境
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| 环境 | 命令 | 说明 |
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|------|------|------|
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| 开发 | `npm run prisma:migrate` | 创建新迁移文件并应用 |
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| 生产 | `prisma migrate deploy` | 只应用已有迁移,不创建新迁移 |
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## 文件结构
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```
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backend/
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├── Dockerfile # Docker 镜像构建配置
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├── entrypoint.sh # 容器启动脚本(自动迁移)
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├── prisma/
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│ ├── schema.prisma # 数据库模型定义
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│ ├── seed.ts # 初始数据填充脚本
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│ └── migrations/ # 迁移文件目录
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│ ├── 20260110052756_init/
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│ │ └── migration.sql
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│ └── migration_lock.toml
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└── ...
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```
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## 部署配置
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### Dockerfile 关键配置
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```dockerfile
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# 安装 tsx(用于执行 seed.ts)
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RUN npm install -g tsx
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# 复制 entrypoint 脚本
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COPY backend/entrypoint.sh /app/entrypoint.sh
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RUN chmod +x /app/entrypoint.sh
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# 使用 entrypoint 启动
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CMD ["/app/entrypoint.sh"]
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```
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### Docker Compose 配置
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```yaml
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backend:
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build:
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context: /opt/nginx/html/ai/current # 包含 shared 目录
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dockerfile: backend/Dockerfile
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volumes:
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- /opt/nginx/html/ai/current/backend/prisma:/app/prisma # 数据库持久化
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```
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## 常见操作
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### 创建新的数据库迁移
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```bash
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# 1. 修改 schema.prisma
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vim backend/prisma/schema.prisma
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# 2. 创建迁移
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cd backend
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npm run prisma:migrate -- --name add_new_field
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# 3. 提交到 Git
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git add backend/prisma/migrations/
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git commit -m "feat: 添加新字段"
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git push
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```
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### 手动执行迁移(如果需要)
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```bash
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# 在容器内执行
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docker exec -it ai-learning-backend sh
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npx prisma migrate deploy
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```
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### 查看迁移状态
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```bash
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# 查看数据库中的迁移记录
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docker exec -it ai-learning-backend sh
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npx prisma migrate status
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```
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### 回滚迁移(谨慎操作)
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Prisma 不直接支持回滚,需要:
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1. 创建新的迁移来撤销更改
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2. 或手动修改数据库
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## 注意事项
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1. **迁移文件必须提交到 Git**
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- 所有迁移文件都需要版本控制
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- 确保团队成员都能访问相同的迁移历史
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2. **不要在生产环境使用 `prisma migrate dev`**
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- 这会创建新的迁移文件
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- 生产环境应使用 `prisma migrate deploy`
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3. **数据库文件持久化**
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- 数据库文件通过 Docker volume 挂载
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- 位置: `/opt/nginx/html/ai/current/backend/prisma/dev.db`
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- 容器重启不会丢失数据
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4. **首次部署**
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- 容器启动时会自动创建数据库
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- 自动应用所有迁移
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- 自动填充初始数据(seed)
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5. **后续更新**
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- 容器启动时自动检查并应用新迁移
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- 不会重复执行已应用的迁移
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- 不会重复执行 seed(seed 脚本会清理现有数据)
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## 故障排查
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### 迁移失败
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```bash
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# 查看容器日志
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docker logs ai-learning-backend
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# 进入容器检查
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docker exec -it ai-learning-backend sh
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npx prisma migrate status
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```
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### 数据库锁定
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SQLite 数据库可能被锁定,检查是否有其他进程在使用数据库。
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### Seed 执行失败
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Seed 脚本失败不会阻止容器启动,但会输出警告信息。检查日志确认原因。
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## 总结
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✅ **自动化**: 容器启动时自动执行迁移
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✅ **安全**: 迁移文件版本控制
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✅ **持久化**: 数据库文件持久化存储
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✅ **灵活**: 支持开发和生产环境的不同流程
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每次代码更新时,只需:
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1. 创建迁移(如需要)
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2. 提交到 Git
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3. Jenkins 自动部署
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4. 容器启动时自动应用迁移
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无需手动干预!
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216
Jenkinsfile
vendored
216
Jenkinsfile
vendored
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stage('Build') {
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stage('Build') {
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steps {
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steps {
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script {
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script {
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// 先检查 Docker 命令是否可用
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// 定义构建命令(公共部分)
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def dockerAvailable = false
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def buildCommands = '''
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echo "Node 版本: $(node --version)"
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echo "NPM 版本: $(npm --version)"
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||||||
|
echo "安装依赖..."
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||||||
|
npm install
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npm run install:all
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echo "构建前端..."
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npm run build --workspace=frontend
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echo "构建后端..."
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cd backend && npm run build && npm run prisma:generate && cd ..
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'''
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// 尝试使用 Docker 构建,失败则回退到主机构建
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def useDocker = false
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try {
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try {
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def dockerCheck = sh(
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def dockerCheck = sh(
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script: 'command -v docker || docker --version',
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script: 'command -v docker >/dev/null 2>&1 && docker --version',
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returnStatus: true
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returnStatus: true
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)
|
)
|
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if (dockerCheck == 0) {
|
if (dockerCheck == 0) {
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dockerAvailable = true
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useDocker = true
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echo "Docker 命令可用"
|
|
||||||
} else {
|
|
||||||
echo "Docker 命令不可用,将使用主机构建"
|
|
||||||
}
|
}
|
||||||
} catch (Exception e) {
|
} catch (Exception e) {
|
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echo "检查 Docker 时出错: ${e.getMessage()}"
|
echo "Docker 不可用,使用主机构建"
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dockerAvailable = false
|
|
||||||
}
|
}
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||||||
|
|
||||||
// 如果 Docker 可用,尝试使用 Docker 构建
|
if (useDocker) {
|
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if (dockerAvailable) {
|
|
||||||
try {
|
try {
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def nodeImage = docker.image("node:18")
|
docker.image("node:18").inside('-v /var/run/docker.sock:/var/run/docker.sock') {
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echo "使用 Docker 容器构建..."
|
sh buildCommands
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nodeImage.inside('-v /var/run/docker.sock:/var/run/docker.sock') {
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|
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sh '''
|
|
||||||
echo "在 Docker 容器中构建..."
|
|
||||||
echo "Node 版本:"
|
|
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node --version
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|
||||||
echo "NPM 版本:"
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|
||||||
npm --version
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|
|
||||||
# 安装依赖
|
|
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echo "安装依赖..."
|
|
||||||
npm install
|
|
||||||
npm run install:all
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|
||||||
|
|
||||||
# 构建前端
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echo "构建前端..."
|
|
||||||
npm run build --workspace=frontend
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|
||||||
|
|
||||||
# 构建后端
|
|
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echo "构建后端..."
|
|
||||||
cd backend
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npm run build
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||||||
npm run prisma:generate
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|
||||||
cd ..
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|
||||||
'''
|
|
||||||
}
|
}
|
||||||
} catch (Exception e) {
|
} catch (Exception e) {
|
||||||
echo "Docker 构建失败,回退到主机构建..."
|
echo "Docker 构建失败,回退到主机构建: ${e.getMessage()}"
|
||||||
echo "错误信息: ${e.getMessage()}"
|
useDocker = false
|
||||||
dockerAvailable = false
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
// 如果 Docker 不可用或失败,使用主机构建
|
if (!useDocker) {
|
||||||
if (!dockerAvailable) {
|
|
||||||
echo "使用主机构建..."
|
|
||||||
sh '''
|
sh '''
|
||||||
echo "在主机上构建..."
|
|
||||||
|
|
||||||
# 检查 Node.js
|
|
||||||
if ! command -v node &> /dev/null; then
|
if ! command -v node &> /dev/null; then
|
||||||
echo "错误: Node.js 未安装,请安装 Node.js 18+"
|
echo "错误: Node.js 未安装,请安装 Node.js 18+"
|
||||||
exit 1
|
exit 1
|
||||||
fi
|
fi
|
||||||
|
''' + buildCommands
|
||||||
echo "Node 版本:"
|
|
||||||
node --version
|
|
||||||
echo "NPM 版本:"
|
|
||||||
npm --version
|
|
||||||
|
|
||||||
# 安装依赖
|
|
||||||
echo "安装依赖..."
|
|
||||||
npm install
|
|
||||||
npm run install:all
|
|
||||||
|
|
||||||
# 构建前端
|
|
||||||
echo "构建前端..."
|
|
||||||
npm run build --workspace=frontend
|
|
||||||
|
|
||||||
# 构建后端
|
|
||||||
echo "构建后端..."
|
|
||||||
cd backend
|
|
||||||
npm run build
|
|
||||||
npm run prisma:generate
|
|
||||||
cd ..
|
|
||||||
'''
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
@ -124,24 +81,18 @@ pipeline {
|
|||||||
# 复制前端构建产物
|
# 复制前端构建产物
|
||||||
cp -r frontend/dist deploy-package/frontend-dist
|
cp -r frontend/dist deploy-package/frontend-dist
|
||||||
|
|
||||||
# 复制后端构建产物和必要文件
|
# 复制后端文件
|
||||||
mkdir -p deploy-package/backend
|
mkdir -p deploy-package/backend
|
||||||
cp -r backend/dist deploy-package/backend/dist
|
cp -r backend/{dist,prisma} deploy-package/backend/
|
||||||
cp -r backend/prisma deploy-package/backend/prisma
|
cp backend/{package.json,Dockerfile,entrypoint.sh} deploy-package/backend/ 2>/dev/null || true
|
||||||
cp backend/package.json deploy-package/backend/
|
|
||||||
cp backend/package-lock.json deploy-package/backend/ 2>/dev/null || true
|
cp backend/package-lock.json deploy-package/backend/ 2>/dev/null || true
|
||||||
|
chmod +x deploy-package/backend/entrypoint.sh 2>/dev/null || true
|
||||||
|
|
||||||
# 复制 Docker 相关文件
|
# 复制 shared 包和 Docker 配置
|
||||||
|
[ -d shared ] && cp -r shared deploy-package/
|
||||||
mkdir -p deploy-package/docker
|
mkdir -p deploy-package/docker
|
||||||
cp nginx/docker-compose.production.yml deploy-package/docker/docker-compose.yml
|
cp nginx/{docker-compose.production.yml,nginx.conf.docker} deploy-package/docker/
|
||||||
cp nginx/nginx.conf.docker deploy-package/docker/nginx.conf.docker
|
cp scripts/deploy-docker.sh deploy-package/ && chmod +x deploy-package/deploy-docker.sh
|
||||||
if [ -f backend/Dockerfile ]; then
|
|
||||||
cp backend/Dockerfile deploy-package/backend/
|
|
||||||
fi
|
|
||||||
|
|
||||||
# 复制部署脚本
|
|
||||||
cp scripts/deploy-docker.sh deploy-package/
|
|
||||||
chmod +x deploy-package/deploy-docker.sh
|
|
||||||
|
|
||||||
# 创建部署包
|
# 创建部署包
|
||||||
tar -czf deploy-package.tar.gz deploy-package/
|
tar -czf deploy-package.tar.gz deploy-package/
|
||||||
@ -149,93 +100,36 @@ pipeline {
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
stage('Deploy to Remote Server') {
|
stage('Deploy') {
|
||||||
steps {
|
steps {
|
||||||
echo '部署到远程服务器...'
|
echo '部署到远程服务器...'
|
||||||
script {
|
|
||||||
// 使用 SSH 传输文件并执行部署
|
|
||||||
sh '''
|
|
||||||
# 传输部署包到远程服务器
|
|
||||||
scp -o StrictHostKeyChecking=no deploy-package.tar.gz ${DEPLOY_USER}@${DEPLOY_HOST}:/tmp/
|
|
||||||
|
|
||||||
# 在远程服务器上执行部署
|
|
||||||
ssh -o StrictHostKeyChecking=no ${DEPLOY_USER}@${DEPLOY_HOST} << 'ENDSSH'
|
|
||||||
# 创建部署目录
|
|
||||||
mkdir -p /opt/nginx/html/ai
|
|
||||||
|
|
||||||
# 解压部署包
|
|
||||||
cd /tmp
|
|
||||||
tar -xzf deploy-package.tar.gz
|
|
||||||
|
|
||||||
# 备份旧版本(如果存在)
|
|
||||||
if [ -d /opt/nginx/html/ai/current ]; then
|
|
||||||
mv /opt/nginx/html/ai/current /opt/nginx/html/ai/backup-$(date +%Y%m%d-%H%M%S)
|
|
||||||
fi
|
|
||||||
|
|
||||||
# 创建新版本目录
|
|
||||||
mkdir -p /opt/nginx/html/ai/current
|
|
||||||
|
|
||||||
# 复制前端文件
|
|
||||||
cp -r deploy-package/frontend-dist/* /opt/nginx/html/ai/current/
|
|
||||||
|
|
||||||
# 复制后端文件
|
|
||||||
mkdir -p /opt/nginx/html/ai/current/backend
|
|
||||||
cp -r deploy-package/backend/* /opt/nginx/html/ai/current/backend/
|
|
||||||
|
|
||||||
# 复制 Docker 配置文件
|
|
||||||
mkdir -p /opt/nginx/html/ai/current/docker
|
|
||||||
cp deploy-package/docker/docker-compose.yml /opt/nginx/html/ai/current/docker/
|
|
||||||
cp deploy-package/docker/nginx.conf.docker /opt/nginx/html/ai/current/docker/
|
|
||||||
|
|
||||||
# 创建 nginx logs 目录
|
|
||||||
mkdir -p /opt/nginx/html/ai/current/docker/logs
|
|
||||||
|
|
||||||
# 执行 Docker 部署脚本
|
|
||||||
if [ -f deploy-package/deploy-docker.sh ]; then
|
|
||||||
chmod +x deploy-package/deploy-docker.sh
|
|
||||||
bash deploy-package/deploy-docker.sh /opt/nginx/html/ai/current
|
|
||||||
fi
|
|
||||||
|
|
||||||
# 清理临时文件
|
|
||||||
rm -rf /tmp/deploy-package /tmp/deploy-package.tar.gz
|
|
||||||
|
|
||||||
echo "部署完成!"
|
|
||||||
ENDSSH
|
|
||||||
'''
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
stage('Restart Services') {
|
|
||||||
steps {
|
|
||||||
echo '重启 Docker 服务...'
|
|
||||||
sh '''
|
sh '''
|
||||||
|
# 传输部署包
|
||||||
|
scp -o StrictHostKeyChecking=no deploy-package.tar.gz ${DEPLOY_USER}@${DEPLOY_HOST}:/tmp/
|
||||||
|
|
||||||
|
# 在远程服务器上执行部署(deploy-docker.sh 已包含重启服务逻辑)
|
||||||
ssh -o StrictHostKeyChecking=no ${DEPLOY_USER}@${DEPLOY_HOST} << 'ENDSSH'
|
ssh -o StrictHostKeyChecking=no ${DEPLOY_USER}@${DEPLOY_HOST} << 'ENDSSH'
|
||||||
# 使用 Docker Compose 重启服务
|
set -e
|
||||||
cd /opt/nginx/html/ai/current/docker
|
mkdir -p /opt/nginx/html/ai
|
||||||
|
cd /tmp && tar -xzf deploy-package.tar.gz
|
||||||
|
|
||||||
# 检查 docker-compose 命令(支持新版本的 docker compose)
|
# 备份旧版本
|
||||||
if command -v docker-compose &> /dev/null; then
|
[ -d /opt/nginx/html/ai/current ] && \
|
||||||
COMPOSE_CMD="docker-compose"
|
mv /opt/nginx/html/ai/current /opt/nginx/html/ai/backup-$(date +%Y%m%d-%H%M%S)
|
||||||
else
|
|
||||||
COMPOSE_CMD="docker compose"
|
|
||||||
fi
|
|
||||||
|
|
||||||
# 停止旧容器
|
# 创建新版本目录并复制文件
|
||||||
$COMPOSE_CMD down || true
|
mkdir -p /opt/nginx/html/ai/current/{backend,docker/logs}
|
||||||
|
cp -r deploy-package/frontend-dist/* /opt/nginx/html/ai/current/
|
||||||
|
cp -r deploy-package/backend/* /opt/nginx/html/ai/current/backend/
|
||||||
|
[ -d deploy-package/shared ] && cp -r deploy-package/shared /opt/nginx/html/ai/current/
|
||||||
|
cp deploy-package/docker/* /opt/nginx/html/ai/current/docker/
|
||||||
|
|
||||||
# 重新构建并启动
|
# 执行部署脚本(包含停止、构建、启动和健康检查)
|
||||||
$COMPOSE_CMD up -d --build
|
chmod +x deploy-package/deploy-docker.sh
|
||||||
|
bash deploy-package/deploy-docker.sh /opt/nginx/html/ai/current
|
||||||
|
|
||||||
# 等待服务启动
|
# 清理临时文件
|
||||||
sleep 5
|
rm -rf /tmp/deploy-package /tmp/deploy-package.tar.gz
|
||||||
|
|
||||||
# 检查服务状态
|
|
||||||
$COMPOSE_CMD ps
|
|
||||||
|
|
||||||
echo "Docker 服务已重启"
|
|
||||||
echo "前端访问: http://180.76.180.105:8080"
|
|
||||||
echo "后端 API: http://180.76.180.105:3001"
|
|
||||||
ENDSSH
|
ENDSSH
|
||||||
'''
|
'''
|
||||||
}
|
}
|
||||||
|
|||||||
@ -20,14 +20,21 @@ COPY backend/prisma ./prisma/
|
|||||||
RUN sed -i 's|"@ai-learning/shared": "\*"|"@ai-learning/shared": "file:./shared"|' package.json && \
|
RUN sed -i 's|"@ai-learning/shared": "\*"|"@ai-learning/shared": "file:./shared"|' package.json && \
|
||||||
npm install --production
|
npm install --production
|
||||||
|
|
||||||
|
# 安装 tsx(用于执行 seed.ts)
|
||||||
|
RUN npm install -g tsx || npm install tsx --save-dev || true
|
||||||
|
|
||||||
# 复制构建产物
|
# 复制构建产物
|
||||||
COPY backend/dist ./dist
|
COPY backend/dist ./dist
|
||||||
|
|
||||||
# 生成 Prisma Client
|
# 复制并设置 entrypoint 脚本
|
||||||
|
COPY backend/entrypoint.sh /app/entrypoint.sh
|
||||||
|
RUN chmod +x /app/entrypoint.sh
|
||||||
|
|
||||||
|
# 生成 Prisma Client(在构建时生成,启动时也会重新生成以确保最新)
|
||||||
RUN npx prisma generate
|
RUN npx prisma generate
|
||||||
|
|
||||||
# 暴露端口
|
# 暴露端口
|
||||||
EXPOSE 3001
|
EXPOSE 3001
|
||||||
|
|
||||||
# 启动应用
|
# 使用 entrypoint 脚本启动(会自动执行数据库迁移)
|
||||||
CMD ["node", "dist/index.js"]
|
CMD ["/app/entrypoint.sh"]
|
||||||
|
|||||||
25
backend/entrypoint.sh
Normal file
25
backend/entrypoint.sh
Normal file
@ -0,0 +1,25 @@
|
|||||||
|
#!/bin/sh
|
||||||
|
set -e
|
||||||
|
|
||||||
|
echo "🚀 启动后端服务..."
|
||||||
|
|
||||||
|
# 生成 Prisma Client(确保最新)
|
||||||
|
echo "📦 生成 Prisma Client..."
|
||||||
|
npx prisma generate
|
||||||
|
|
||||||
|
# 检查数据库是否存在
|
||||||
|
if [ ! -f "prisma/dev.db" ]; then
|
||||||
|
echo "📦 数据库不存在,执行初始化..."
|
||||||
|
echo "🔄 执行数据库迁移..."
|
||||||
|
npx prisma migrate deploy
|
||||||
|
|
||||||
|
echo "🌱 填充初始数据..."
|
||||||
|
npx tsx prisma/seed.ts || echo "⚠️ Seed 执行失败或已存在数据"
|
||||||
|
else
|
||||||
|
echo "🔄 数据库已存在,执行迁移..."
|
||||||
|
npx prisma migrate deploy
|
||||||
|
fi
|
||||||
|
|
||||||
|
# 启动应用
|
||||||
|
echo "✅ 数据库就绪,启动应用..."
|
||||||
|
exec node dist/index.js
|
||||||
@ -21,8 +21,8 @@ services:
|
|||||||
# 后端服务
|
# 后端服务
|
||||||
backend:
|
backend:
|
||||||
build:
|
build:
|
||||||
context: /opt/nginx/html/ai/current/backend
|
context: /opt/nginx/html/ai/current # 使用项目根目录作为构建上下文(需要访问 shared 目录)
|
||||||
dockerfile: Dockerfile
|
dockerfile: backend/Dockerfile
|
||||||
container_name: ai-learning-backend
|
container_name: ai-learning-backend
|
||||||
ports:
|
ports:
|
||||||
- "3001:3001"
|
- "3001:3001"
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user