# WSL环境安装指南 - RabbitMQ和OCR依赖

## 快速安装命令

### 方法1: 一键安装 (推荐)

在PowerShell或CMD中执行:

```powershell
# 打开WSL并安装
wsl -d Ubuntu-22.04 -- bash -c "sudo apt-get update && sudo apt-get install -y erlang-nox rabbitmq-server && sudo service rabbitmq-server start"
```

### 方法2: 分步安装

#### 步骤1: 打开WSL终端

```powershell
# PowerShell
wsl -d Ubuntu-22.04

# 或在CMD
wsl -d Ubuntu-22.04
```

#### 步骤2: 更新软件包列表

```bash
sudo apt-get update
```

#### 步骤3: 安装Erlang (RabbitMQ依赖)

```bash
sudo apt-get install -y erlang-nox erlang-dev
```

#### 步骤4: 安装RabbitMQ

```bash
sudo apt-get install -y rabbitmq-server
```

#### 步骤5: 启动RabbitMQ服务

```bash
sudo service rabbitmq-server start
```

#### 步骤6: 验证安装

```bash
# 检查RabbitMQ状态
sudo rabbitmqctl status

# 查看队列列表
sudo rabbitmqctl list_queues
```

### 步骤7: 安装Python依赖

```bash
# 安装Python包管理器
sudo apt-get install -y python3-pip

# 安装必要的Python包
pip3 install flask pika requests
```

## 验证安装

运行验证脚本:

```bash
# 在项目目录下
bash verify_installation.sh
```

或手动验证:

```bash
# 1. 检查Erlang
erl -version

# 2. 检查RabbitMQ
rabbitmq-server --version

# 3. 检查服务状态
sudo service rabbitmq-server status

# 4. 检查Python依赖
python3 -c "import flask, pika, requests; print('All dependencies OK')"
```

## RabbitMQ配置

### 默认配置

- **主机**: localhost
- **端口**: 5672 (AMQP)
- **管理端口**: 15672 (Web UI)
- **默认用户**: guest
- **默认密码**: guest

### 启用管理插件 (可选)

```bash
sudo rabbitmq-plugins enable rabbitmq_management
sudo service rabbitmq-server restart
```

访问管理界面: http://localhost:15672 (guest/guest)

### 创建新用户 (可选)

```bash
# 创建用户
sudo rabbitmqctl add_user ocr_user ocr_password

# 设置为管理员
sudo rabbitmqctl set_user_tags ocr_user administrator

# 设置权限
sudo rabbitmqctl set_permissions -p / ocr_user ".*" ".*" ".*"
```

## 常用命令

### RabbitMQ服务管理

```bash
# 启动
sudo service rabbitmq-server start

# 停止
sudo service rabbitmq-server stop

# 重启
sudo service rabbitmq-server restart

# 查看状态
sudo service rabbitmq-server status
```

### 队列管理

```bash
# 列出所有队列
sudo rabbitmqctl list_queues

# 列出所有交换机
sudo rabbitmqctl list_exchanges

# 列出所有绑定
sudo rabbitmqctl list_bindings

# 清空队列
sudo rabbitmqctl purge_queue queue_name
```

### 用户管理

```bash
# 列出用户
sudo rabbitmqctl list_users

# 添加用户
sudo rabbitmqctl add_user username password

# 删除用户
sudo rabbitmqctl delete_user username

# 修改密码
sudo rabbitmqctl change_password username newpass
```

## 启动OCR服务

安装完成后，在WSL中启动OCR服务:

### 1. 进入项目目录

```bash
cd /mnt/c/Users/WIN10/Desktop/work/26th-week/report-detect-backend
```

### 2. 启动Flask API

```bash
cd python_api
python3 ocr_api_server.py
```

### 3. 启动RabbitMQ消费者 (新终端)

```bash
cd /mnt/c/Users/WIN10/Desktop/work/26th-week/report-detect-backend/python_api

# 设置环境变量
export FLASK_HOST=127.0.0.1
export FLASK_PORT=8081
export RABBITMQ_HOST=localhost
export RABBITMQ_PORT=5672

# 启动消费者
python3 ocr_task_consumer.py
```

### 4. 在Windows中启动Java应用

```powershell
# PowerShell
mvn clean package
java -jar target/report-detect-backend-1.0.0.jar
```

## 故障排查

### RabbitMQ无法启动

```bash
# 查看日志
sudo cat /var/log/rabbitmq/rabbit@hostname.log

# 检查Erlang版本兼容性
erl -version
```

### 连接被拒绝

```bash
# 检查RabbitMQ是否运行
sudo service rabbitmq-server status

# 检查端口是否被占用
sudo netstat -tlnp | grep 5672
```

### Python导入错误

```bash
# 重新安装依赖
pip3 install --upgrade flask pika requests
```

### WSL网络问题

如果WSL无法访问Windows服务:

```bash
# 检查Windows IP
cat /etc/resolv.conf | grep nameserver

# 测试连接
ping -c 3 $(cat /etc/resolv.conf | grep nameserver | awk '{print $2}')
```

## 开机自启动

### 设置RabbitMQ开机自启

```bash
# 方法1: 使用systemd
sudo systemctl enable rabbitmq-server

# 方法2: 使用sysvinit
sudo update-rc.d rabbitmq-server defaults
```

### 设置Flask和消费者开机自启

创建systemd服务文件:

```bash
sudo nano /etc/systemd/system/ocr-flask.service
```

内容:
```ini
[Unit]
Description=OCR Flask API
After=network.target rabbitmq-server.service

[Service]
Type=simple
User=your_username
WorkingDirectory=/mnt/c/Users/WIN10/Desktop/work/26th-week/report-detect-backend/ocr-resources
ExecStart=/usr/bin/python3 ocr_api_server.py
Restart=on-failure

[Install]
WantedBy=multi-user.target
```

启用服务:
```bash
sudo systemctl daemon-reload
sudo systemctl enable ocr-flask
sudo systemctl start ocr-flask
```

## 性能优化

### RabbitMQ内存限制

编辑 `/etc/rabbitmq/rabbitmq.conf`:

```conf
vm_memory_high_watermark.relative = 0.6
vm_memory_high_watermark_paging_ratio = 0.75
```

### 文件描述符限制

```bash
# 检查当前限制
ulimit -n

# 增加限制
echo "* soft nofile 65536" | sudo tee -a /etc/security/limits.conf
echo "* hard nofile 65536" | sudo tee -a /etc/security/limits.conf
```