请教一个数据备份的问题

[godcc]

使用 docker swarm 起了两个服务：一个是 go 写的 web 服务，另外一个是 db （ cockroach ）。现在想在 web 服务中使用 cockroach 的 dump 去备份数据，但是 web 服务中调用不了 cockroach 的指令,这种情况一般要怎么去做备份。 docker compose 文件如下：

version: '3.3'

services:
  web:
    image: 192.168.0.54:5000/airsunweb:v1.0
    environment:
      - MICRO_REGISTRY=etcd
      - MICRO_REGISTRY_ADDRESS=etcd:2379
      - MICRO_SERVER_ADDRESS=0.0.0.0:8080
      - MICRO_LOG_LEVEL=debug
    ports:
      - 7777:8080
    configs:
      - source: web_config 
        target: /config.yaml
      - source: web_base_data_config
        target: /base_data_config.json
      - source: web_param_running_config
        target: /param_running_config.json
  sqldb:
    image: swr.cn-east-3.myhuaweicloud.com/langmy/cockroach:latest
    volumes:
      - sql-data:/cockroach/cockroach-data
    command: start-single-node --insecure
    deploy:
      placement:
        constraints:
          - node.labels.db-data == true

[XSG]

再起一个数据库客户端服务，专门用来备份

[godcc]

请问一下具体该怎么做

[XSG]

```yaml
version: '3.3'

services:
web:
image: 192.168.0.54:5000/airsunweb:v1.0
environment:
- MICRO_REGISTRY=etcd
- MICRO_REGISTRY_ADDRESS=etcd:2379
- MICRO_SERVER_ADDRESS=0.0.0.0:8080
- MICRO_LOG_LEVEL=debug
ports:
- 7777:8080
configs:
- source: web_config
target: /config.yaml
- source: web_base_data_config
target: /base_data_config.json
- source: web_param_running_config
target: /param_running_config.json
sqldb:
image: swr.cn-east-3.myhuaweicloud.com/langmy/cockroach:latest
volumes:
- sql-data:/cockroach/cockroach-data
command: start-single-node --insecure
deploy:
placement:
constraints:
- node.labels.db-data == true
backup:
image: 数据库客户端:latest
environment:
- USER=xxx
- PASSED=xxx
...
```

backup 服务里面自己写个脚本做个镜像，就可以执行备份了呀

[godcc]

@XSG 明白了 感谢