Linux 项目数据目录迁移

## 一、背景说明
服务器上 /home 目录存储容量不足，而其他目录挂载了比较大的磁盘，可以按照以下步骤，将数据目录移动到其他目录。

## 二、操作步骤

1、运行以下命令，关闭所有 Docker 容器服务
```bash
docker stop iot-nginx
docker stop iot-exchange
docker stop iot-eiot
docker stop iot-mongo
docker stop iot-mysql
docker stop iot-redis
docker stop iot-rabbitmq

```
2、用 mv 命令将data文件夹移动到要迁移的目录上去，例如：

```bash
mv /home/acrel-iot-linux/data /data

```

3、更改 /home/acrel-iot-linux/docker/docker-compose.yml ，将移动目录中的内容替换。

```yaml
version: '3'
services:
  iot-mongo:
    image: mongo:4.4
    container_name: iot-mongo
    restart: always
    volumes:
      - 移动目录/data/mongo:/data/db
      - /etc/localtime:/etc/localtime
      - ${DIR}/config/mongo/keyfile:/data/mongo_key_file/keyfile
    environment:
      # ROOT用户名
      MONGO_INITDB_ROOT_USERNAME: acrel
      # ROOT用户密码
      MONGO_INITDB_ROOT_PASSWORD: 1a2c3r4e5l6
    ports:
      # MongoDB连接端口
      - 20051:27017
    deploy:
      resources:
         limits:
            memory: 3G
         reservations:
            memory: 200M
  iot-mysql:
    image: mysql:8.0.28
    container_name: iot-mysql
    restart: always
    volumes:
      - 移动目录/data/mysql:/var/lib/mysql 
      - /etc/localtime:/etc/localtime
    command: 
      --lower_case_table_names=1
      --character-set-server=utf8mb4
      --collation-server=utf8mb4_general_ci
      --explicit_defaults_for_timestamp=true
      --sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION,NO_ENGINE_SUBSTITUTION
    environment:
      MYSQL_ROOT_PASSWORD: 1a2c3r4e5l6
    ports:
      - 20052:3306
  iot-redis:
    image: redis:latest
    container_name: iot-redis
    restart: always
    volumes:
      - /etc/localtime:/etc/localtime
      - 移动目录/data/redis:/data  
    command: 
      --requirepass 1a2c3r4e5l6
      --masterauth 1a2c3r4e5l6
    ports:
      - 20053:6379
  iot-rabbitmq:
    image: rabbitmq:latest
    container_name: iot-rabbitmq
    hostname : iot-rabbitmq 
    restart: always
    environment:
      - LANG=en_US.UTF-8
    volumes:
      - /etc/localtime:/etc/localtime
      - ${DIR}/config/rabbit:/etc/rabbitmq
      - 移动目录/data/rabbit/data:/var/lib/rabbitmq       
      - 移动目录/data/rabbit/log:/var/log/rabbitmq
    ports:
      - "20072:20072"    
      - "20071:1883"
      - "30001:1883"      
      - "5672:5672"
      - "15672:15672"
```

4、运行以下命令重建重启
```bash
docker-compose -f /home/acrel-iot-linux/docker/docker-compose.yml up -d
```