如何在docker中创建volume?

在docker中，通过如下的命令创建volume:

# my_volume_01是自定义的volume的名字

docker volume create my_volume_01

查看创建的volume

docker volume ls

输出结果：

[root@centos7 ~]# docker volume ls
DRIVER    VOLUME NAME
local     my_volume_01
[root@centos7 ~]# 

那么，这个volume具体在docker宿主机上的什么目录中？

docker volume inspect my_volume_01

[root@centos7 ~]# docker volume inspect my_volume_01 
[
    {
        "CreatedAt": "2022-08-23T04:41:24-04:00",
        "Driver": "local",
        "Labels": {},
        "Mountpoint": "/var/lib/docker/volumes/my_volume_01/_data",
        "Name": "my_volume_01",
        "Options": {},
        "Scope": "local"
    }
]
[root@centos7 ~]# 

"Mountpoint": "/var/lib/docker/volumes/my_volume_01/_data"

/var/lib/docker/volumes/my_volume_01/_data 就是这个volume在宿主机上的具体的目录位置。

[root@centos7 _data]# cd /var/lib/docker/volumes/my_volume_01/_data/
[root@centos7 _data]# ls -l
total 0
[root@centos7 _data]# 

该目录确实是在宿主机上存在的。

删除volume

docker volume rm my_volume_01

对应的目录也被删除了

[root@centos7 ~]# cd /var/lib/docker/volumes/my_volume_01/_data/
-bash: cd: /var/lib/docker/volumes/my_volume_01/_data/: No such file or directory
[root@centos7 ~]# 

OK，以上就是在docker上创建volume的过程！