# Docker 数据卷（volume）

资料

[Docker容器学习梳理 - Volume数据卷使用](https://www.cnblogs.com/kevingrace/p/6238195.html)

[Docker容器的数据卷（data volume），数据卷容器，数据卷的备份和还原。](https://www.cnblogs.com/yaowen/p/8431710.html)

volume是存在于一个或多个容器中的特定文件或文件夹，这个目录以独立于联合文件系统的形式在宿主机中存在，并为数据库共享与持久化提供便利．

## 使用

举例

Portainer的基本使用时

```
$ docker volume create portainer_data
$ docker run -d -p 9000:9000 -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer
```

首先：首选创建了一个数据卷

默认存在宿主机器中/var/lib/docker/volumes/目录，创建一个portainer\_data的目录，并将volume中的内容存储在名为 \_data的目录下.

```
/var/lib/docker/volumes/portainer_data
```

其次：

启动的时候通过挂在的方式使用-v参数进行挂在．平时开发当中多个挂在多个，也可以使用自己的目录进行挂载／

也可以通过docker volume inspect 命令获取该volume包括在其宿主机中改文件夹的位置等信息．

```
$ docker volume inspect portainer_data
[
    {
        "CreatedAt": "2018-08-13T09:55:43+08:00",
        "Driver": "local",
        "Labels": {},
        "Mountpoint": "/var/lib/docker/volumes/portainer_data/_data",
        "Name": "portainer_data",
        "Options": {},
        "Scope": "local"
    }
]
```


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