docker - 如何使用与主机共享的数据创建命名 Docker 数据卷

Question

如何使用版本 2.1 Docker Compose 语法创建共享命名卷。我想将主机文件夹安装为共享卷，并在关机期间将数据保留在主机上。

web:
< ----- remainder of service defn omitted for clarity ----->
  # Load the external volume 'pgdata' into the folder /var.. on the host
  volumes:
    - pg-data:/var/lib/postgresql/data


# Top level volumes key allows sharing of volume across multiple services
# Volumes defined as name: <path on host>
volumes:
  # Volume named pgdata is located here on the host
  pg-data: #/var/lib/postgresql/data/
  # App data volume
  app-data: #./scribl/
  # Static files volume
  static-data: #./static/

更新: 我正在寻找的关键是能够指定主机上共享卷的位置，即与旧方法相同，但使用命名容器

volumes:
  - location/on/host:location/on/container

Answer 1

好吧，经过对 git issues 列表的大量搜索，我们得到了:

Github Issue

实现如下所示，其中volumes是顶级命令:

volumes:
  # Volume named pgdata is located here on the host
  pg-data: #/var/lib/postgresql/data/
    driver: local
    driver_opts:
      device: /var/lib/postgres/ # this is the mount path on the host
      o: bind

编辑:
设备路径必须是绝对路径 -> 与 docker 开发人员对此进行了大量的来回讨论