docker-compose用于纯数据容器和web服务器,postgresql

Question

我正在使用docker-compose.yml文件为我的django nginx postgresql和一个纯数据容器构建3个docker容器.

这是我的docker-compose.yml

data:
  # pure data container
  image: busybox
  volumes:
    - /etc/postgresql
    - /var/log/postgresql:/var/log/postgresql
    - /var/lib/postgresql
    - /var/log/nginx:/var/log/nginx
    - /var/log/supervisor:/var/log/supervisor

db:
  image: postgres
  volumes_from:
    - data

web:
  build: .
  ports:
    - "80:80"
    - "443:443"
  links:
    - db
  volumes_from:
    - data


$docker ps -a
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS                     PORTS                                      NAMES
cc26b3a72a02        myweb_web:latest    "supervisord -n"       6 minutes ago       Up 6 minutes               0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp   myweb_web_1         
14763a9f68d1        postgres:latest     "/docker-entrypoint.   6 minutes ago       Up 6 minutes               5432/tcp                                   myweb_db_1          
37598892038b        busybox:latest      "/bin/sh"              6 minutes ago       Exited (0) 6 minutes ago                                              myweb_data_1

我担心如何备份和恢复存储在纯数据容器(myweb_data_1)中的postgresql数据.我使用"docker-compose build && docker-compose up"命令重建docker镜像并重新启动容器,如果我更新代码,但不确定这是否正确或最佳方式.

Answer 1

你可以试试这个：

docker run --volumes-from myweb_data_1 -v $(pwd):/backup ubuntu tar cvf /backup/backup.tar