Docker-compose mariadb 外部卷映射问题 [英] Docker-compose mariadb external volume mapping issue

问题描述

我想使用外部目录作为音量和挣扎

I wanted to use external directory as volume and struggling

  mariadb:
    image: mariadb:10.4
   ...
    environment:
      ..
    logging:
...
    networks:
      - backend
    restart: on-failure
    volumes:
      - maria_volume:/var/lib/mysql
    command: --character-set-server=utf8mb4 --collation-server=utf8mb4_general_ci
  
# Volumes
volumes:
  maria_volume:

ma​​ria_volume: 是什么意思?

参考:https://www.cloudytuts.com/tutorials/docker/how-to-add-persistent-data-to-mysql-with-docker-compose/

理想情况下我想要类似的东西

Ideally I want something like

volumes:
  maria_volume:
    external:
      name: ${PWD}/mariadb

但它给出了错误

卷 C:/some/test/mariadb 声明为外部，但不能成立.请使用 docker volume create --name=C:/some/test/mariadb 手动创建卷，然后重试.

Volume C:/some/test/mariadb declared as external, but could not be found. Please create the volume manually using docker volume create --name=C:/some/test/mariadb and try again.

如果我运行卷创建，它会报错

If I run the volume create, it complains

仅包含本地卷名的无效字符[a-zA-Z0-9][a-zA-Z0-9_.-]"

includes invalid characters for a local volume name, only "[a-zA-Z0-9][a-zA-Z0-9_.-]"

如何创建外部卷并查看数据文件?

How can I create external volume and see data files?

我的环境是带有 Gitbash 的 Windows10.但我正在寻找一种适用于任何地方的解决方案，即我的本地 + 云

My environment is Windows10 with Gitbash. But I am looking for a solution that works anywhere i.e. my local + cloud

推荐答案

在你展示的这个文件中，maria_volume 是一个 命名卷.您可能想要一个 绑定挂载 代替:删除 volumes: 块在文件末尾，并在容器设置中，使用主机目录名称而不是名称 maria_volume.

In this file as you've shown it, maria_volume is a named volume. You probably want a bind mount instead: remove the volumes: block at the end of the file, and in the container setup, use the host directory name instead of the name maria_volume.

version: '3.8'
services:
  mariadb:
    volumes:
      # Compose knows how to interpret relative paths;
      # they are relative to the location of the docker-compose.yml file
      - ./mariadb:/var/lib/mysql
# no top-level volumes: for this setup

请注意，在某些平台上，Docker 命名卷可能比绑定挂载快得多.由于数据库存储将是复杂二进制格式的不透明文件，因此您无法真正直接查看它们，即使您确实拥有 Docker 空间之外的文件.问题中的命名卷方法实际上可能更适合数据库存储.

Note that, on some platforms, Docker named volumes may be significantly faster than bind mounts. Since the database storage will be opaque files in a complex binary format, you can't really look at them directly, even if you do have the files outside of Docker space. The named-volume approach in the question may actually be better for database storage.

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