docker volume create

内容説明

Creates a new volume that containers can consume and store data in. If a name is not specified, Docker generates a random name.

オプション

利用例

Create a volume and then configure the container to use it:

$ docker volume create hello

hello

$ docker run -d -v hello:/world busybox ls /world

The mount is created inside the container's /world directory. Docker doesn't support relative paths for mount points inside the container.

Multiple containers can use the same volume. This is useful if two containers need access to shared data. For example, if one container writes and the other reads the data.

Volume names must be unique among drivers. This means you can't use the same volume name with two different drivers. Attempting to create two volumes with the same name results in an error:

A volume named  "hello"  already exists with the "some-other" driver. Choose a different volume name.

If you specify a volume name already in use on the current driver, Docker assumes you want to reuse the existing volume and doesn't return an error.

Driver-specific options (-o, --opt)

Some volume drivers may take options to customize the volume creation. Use the -o or --opt flags to pass driver options:

$ docker volume create --driver fake \
    --opt tardis=blue \
    --opt timey=wimey \
    foo

These options are passed directly to the volume driver. Options for different volume drivers may do different things (or nothing at all).

The built-in local driver accepts no options on Windows. On Linux and with Docker Desktop, the local driver accepts options similar to the Linux mount command. You can provide multiple options by passing the --opt flag multiple times. Some mount options (such as the o option) can take a comma-separated list of options. Complete list of available mount options can be found here.

For example, the following creates a tmpfs volume called foo with a size of 100 megabyte and uid of 1000.

$ docker volume create --driver local \
    --opt type=tmpfs \
    --opt device=tmpfs \
    --opt o=size=100m,uid=1000 \
    foo

Another example that uses btrfs:

$ docker volume create --driver local \
    --opt type=btrfs \
    --opt device=/dev/sda2 \
    foo

Another example that uses nfs to mount the /path/to/dir in rw mode from 192.168.1.1:

$ docker volume create --driver local \
    --opt type=nfs \
    --opt o=addr=192.168.1.1,rw \
    --opt device=:/path/to/dir \
    foo