如何更改“ docker create volume”的默认位置？命令？ [英] How to change the default location for "docker create volume" command?

问题描述

通过卷API创建卷时，也就是说，由于容器卷模式现在不再是最佳做法了：

When creating volumes through the volume API, that is, as the container volume pattern is now not necessarily the best practice anymore:

# docker volume inspect test-data
[
    {
        "Name": "test-data",
        "Driver": "local",
        "Mountpoint": "/var/lib/docker/volumes/test-data/_data"
    }
]

例如，我想让docker卷存在于/ data中（安装在不同的物理卷中）。

I would like to, for example, have docker volumes exist in /data (which is mounted in a different physical volume).

这与符号链接是不可能的，绑定绑定是可能的，但是我想知道Docker中是否有一些配置可以更改每个单独的卷的默认位置。

This is not possible to do with symbolic links, it is possible to do with bind mounts, but would I'm wondering if there is some configuration in Docker to change the default location for each separate volume.

推荐答案

您可以通过更改其中一个启动参数称为-数据根。

You can change where Docker stores its files including volumes by changing one of its startup parameters called --data-root.

如果您使用systemd进行服务管理，则文件通常位于 /lib/systemd/system/docker.service 。这样编辑文件：

If you're using systemd for service management, the file is usually located at /lib/systemd/system/docker.service. Edit the file as such:

# Old - taken from the generated docker.service file in Ubuntu 16.04's docker.io package
ExecStart=/usr/bin/dockerd -H fd:// $DOCKER_OPTS

# New
ExecStart=/usr/bin/dockerd --data-root /new_location/ -H fd:// $DOCKER_OPTS

或者，您可以编辑Docker守护程序配置文件，默认为 /etc/docker/daemon.json 。

Alternatively, you can edit the Docker daemon configuration file which defaults to /etc/docker/daemon.json.

重新启动Docker守护程序，您的卷将低于 / new_location / volumes / {volume_name} / _ data

Restart the Docker daemon and your volumes will be under /new_location/volumes/{volume_name}/_data

注意：在生产中也要小心本地！您还必须将现有数据从 / var / lib / docker / 移至新位置，以使docker安装能够按预期进行。

Note: be careful in production and also locally! You also have to move the existing data from /var/lib/docker/ to the new location for your docker install to work as expected.

如果要将特定文件夹放在特定位置，则可以使用新位置的符号链接。

You can use symlinks from the new location if you want specific folders to be in specific place.

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