Docker Volume

What is Docker Volume?

将应用和环境打包成镜像

How to use Docker Volume!

Docker volume

Usage:  docker volume COMMAND
Manage volumes
Commands:
  create      Create a volume
  inspect     Display detailed information on one or more volumes
  ls          List volumes
  prune       Remove all unused local volumes
  rm          Remove one or more volumes
Run 'docker volume COMMAND --help' for more information on a command.

1. 直接使用命令挂载 -v

docker run -it -v hostDirectory:containerDirectory -p
Linux下挂载：
docker run -it -v /home:/home centos bash
Windows下挂载：和Linux下的文件路径有区别
docker run -it -v /d/zm/home:/home centos bash

1. 匿名挂载 ```shell 不指定宿主机路径 [root@qq mysql]# docker run -d -P —name nginx03 -v /etc/nginx nginx #-P 随机端口 df6c74352f6a478e1dc5f16b3590e72ba7759ccd43b5b670ba77d7d05e19b347

[root@qq mysql]# docker volume ls #查看所有卷的情况 DRIVER VOLUME NAME local 7d3b5ef373129af03bc56e96499bd32e76fba00eaa953284bc7a6ddd16bcafac #这都是匿名的 local 51d1c577c2520e6b132de06ea90b438134da6bd4f98c38648a85bcd37f047c95

3. 具名挂载
```shell
[root@qq mysql]# docker run -d -P --name nginx04 -v juming-nginx:/etc/nginx nginx   #-v 卷名:容器内路径
cae0cb1b8a8645dabb731d6bd4c081c2fe85df873a0978c4552003052462f26d
[root@qq mysql]# docker volume ls
DRIVER              VOLUME NAME
local               7d3b5ef373129af03bc56e96499bd32e76fba00eaa953284bc7a6ddd16bcafac
local               51d1c577c2520e6b132de06ea90b438134da6bd4f98c38648a85bcd37f047c95
local               juming-nginx
[root@qq mysql]# docker inspect juming-nginx                    ##可通过这个来看对应的nginx目录
[
    {
        "CreatedAt": "2020-05-19T09:35:10+08:00",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/juming-nginx/_data",  ##在这
        "Name": "juming-nginx",
        "Options": null,
        "Scope": "local"
    }
]
这些文件都在/var/lib/docker/volumes/xxx/_data中

总结：

-v 容器路径 #匿名 在/var/lib/docker/volumes/xxx/_data 随机生成文件夹
-v 卷名:容器路径 #具名挂载
-v 宿主机路径:容器路径 #指定路径挂载

拓展：

-v 容器内路径：ro rw 改变读写的权限 ro readonly # 表示只读 rw readwrite #可读可写

Example

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