Docker卷安装不存在 [英] Docker volume mount doesn't exist

问题描述

我在OS X上运行Docker 1.11，我试图找出我的本地卷的写入位置。我通过运行 docker volume create -name mysql 创建了一个Docker卷。然后我运行 docker volume检查mysql ，并输出以下内容：

  [
 {
Name：mysql，
Driver：local，
Mountpoint：/ mnt / sda1 / var / lib / docker /卷/ mysql / _data，
标签：{} 
} 
] 
  

问题是我的机器上并不存在 / mnt / sda1 / var / lib / docker / volumes / mysql / _data 我以为也许这个问题是，直到它被一个容器使用才实际创建，所以我通过运行 docker run -name mysql -v mysql：/ var / lib / mysql启动一个容器-e MYSQL_ROOT_PASSWORD = mysql -P -d mysql：5.7 然后在MySQL中创建一个数据库，但挂载点仍然不存在。我甚至运行 docker检查mysql 以确保它使用正确的卷，并得到以下内容：

 code> ... 
Mounts：[
 {
Name：mysql，
Source：/ mnt / sda1 / var / lib / docker / volumes / mysql / _data，
Destination：/ var / lib / mysql，
Driver：local，
Mode ，
RW：true，
传播：rprivate
} 
]，
 ... 
  

在这一点上，我完全失去了写入数据的位置。因为Docker是基于Linux的，它不能直接在Windows / OS X上运行。相反，它是在运行Linux操作系统的VirtualBox虚拟机（Docker Machine）中运行。这就是为什么当您安装Docker Toolbox时，您会看到VirtualBox已安装。

要查看此虚拟机中的文件和文件夹，请使用

  docker-machine ssh default 
  

default 是默认的Docker Machine的名称。

I'm running Docker 1.11 on OS X and I'm trying to figure out where my local volumes are being written. I created a Docker volume by running docker volume create --name mysql. I then ran docker volume inspect mysql and it output the following:

[
    {
        "Name": "mysql",
        "Driver": "local",
        "Mountpoint": "/mnt/sda1/var/lib/docker/volumes/mysql/_data",
        "Labels": {}
    }
]

The issue is /mnt/sda1/var/lib/docker/volumes/mysql/_data doesn't actually exist on my machine. I thought maybe the issue was that it didn't actually get created until it was used by a container so I started a container by running docker run --name mysql -v mysql:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=mysql -P -d mysql:5.7 and then created a database in MySQL, but the mount point still doesn't exist. I even ran docker inspect mysql to ensure it's using the correct volume and got the following:

...
"Mounts": [
    {
        "Name": "mysql",
        "Source": "/mnt/sda1/var/lib/docker/volumes/mysql/_data",
        "Destination": "/var/lib/mysql",
        "Driver": "local",
        "Mode": "z",
        "RW": true,
        "Propagation": "rprivate"
    }
],
...

At this point I'm completely lost as to where the data is being written. What am I missing?

解决方案

Because Docker is based on Linux, it cannot run directly on Windows/OS X. Instead, it runs inside a VirtualBox virtual machine (a Docker Machine) that runs a Linux operating system. That's why when you install Docker Toolbox you see that VirtualBox is installed.

To see files and folders inside this virtual machine, use

docker-machine ssh default

default is the name of the default Docker Machine.

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