Docker撰写不持久化数据 [英] Docker compose not persisting data

问题描述

我有以下 docker-compose.yml 文件：

version: '2'
services:
  web:
    image: myspringapp:1
    ports:
      - "8080:8080"
    depends_on:
      - myspringapp_postgres
  myspringapp_postgres:
    image: postgres:9.4 
    ports:
      - "5432:5432"
    volumes:
      - ./pgdata:/var/lib/postgresql/data
volumes:
  pgdata: {} 

myspringapp是我之前构建的docker映像。问题是执行 docker-compose stop 后数据丢失。有人知道问题出在哪里吗？

myspringapp is a docker image I build previously. The problem with this is that the data is lost after doing a docker-compose stop. Anyone know what the problem is?

推荐答案

好像在定义一个卷，但是指定了要使用的绑定挂载

Looks like you're defining a volume, but specifying a bind-mount to be used.

在某种意义上，卷实际上是它自己的独立驱动器，其中绑定安装需要映射到您的特定文件路径

The different here, is a volume is actually it's own isolated "drive" in a sense, where a bind-mount needs to map to a specific file path on your local system.

如果您在本地 ./ pgdata 目录中签入，则应该找到以前的所有数据。并且要解决您的问题，您需要从其中删除 ./ ，并仅指定名称 pgdata ，以便它使用定义的卷。当然，这会重新开始。

If you check in your local ./pgdata directory, you should find all your previous data; and to fix your issue you'll want to remove the ./ from that and just specify the name pgdata so that it uses the volume as defined. Of course, this will start you fresh again.

compose-file.yml

version: '2'
services:
  web:
    image: myspringapp:1
    ports:
      - "8080:8080"
    depends_on:
      - myspringapp_postgres

  myspringapp_postgres:
    image: postgres:9.4 
    ports:
      - "5432:5432"
    volumes:
      - pgdata:/var/lib/postgresql/data
volumes:
  pgdata: {} 

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