blocks|key|101435|text|一种简单得多的解决方案是创建一个指向所需内容的软链接点，例如|type|unstyled|depth|inlineStyleRanges|entityRanges|data|101436|link+-s+/var/lib/docker+/mnt/whatever|code-block|syntax|javascript|101437|它适用于我的CentOS+6.5服务器。|101438|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

A much simpler solution is to create a soft link point to whatever you want, such as

<pre><code>link -s /var/lib/docker /mnt/whatever
</code></pre>

It works for me on my CentOS 6.5 server.

blocks|key|101447|text|在CentOS+6.5中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|101448|service+docker+stop
mkdir+/data/docker++(new+directory)
vi+/etc/sysconfig/docker|code-block|syntax|javascript|101449|添加以下行|101450|other_args="+-g+/data/docker+-p+/var/run/docker.pid"|101451|然后保存文件并重新启动docker|101452|service+docker+start|101453|并将在/data/docker中生成存储库文件|offset|length|style|CODE|101454|entityMap^0|0|0|0|0|0|0|3|C|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|12|8|@$Q|13|R|14|S|T]]|9|@]|A|$]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

In CentOS 6.5

<pre><code>service docker stop
mkdir /data/docker (new directory)
vi /etc/sysconfig/docker
</code></pre>

add following line

<pre><code>other_args=" -g /data/docker -p /var/run/docker.pid"
</code></pre>

then save the file and start docker again

<pre><code>service docker start
</code></pre>

and will make repository file in <code>/data/docker</code>

blocks|key|4608081|text|在AWS+Ubuntu+16.04服务器上，我将Docker镜像放在一个单独的EBS上，挂载在/home/ubuntu/kaggle/上，位于docker目录下|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4608082|我的初始化脚本的这段代码工作正常|4608083|#+where+are+the+images+initially+stored?
sudo+docker+info+%7C+grep+"Root+Dir"
#+...+not+where+I+want+them

#+modify+the+configuration+files+to+change+to+image+location
#+NOTE+this+generates+an+error
#+WARNING:+Usage+of+loopback+devices+is+strongly+discouraged+for+production+use.
#++++++++++Use+`--storage-opt+dm.thinpooldev`+to+specify+a+custom+block+storage+device.
#+see+https://stackoverflow.com/questions/31620825/
#+++++warning-of-usage-of-loopback-devices-is-strongly-discouraged-for-production-use

sudo+sed+-i+++'+s@#DOCKER_OPTS=.*@DOCKER_OPTS="-g+/home/ubuntu/kaggle/docker"@+'++/etc/default/docker

sudo+chmod+-R+ugo%2Brw+/lib/systemd/system/docker.service
sudo+cp++/lib/systemd/system/docker.service+/etc/systemd/system/
sudo+chmod+-R+ugo%2Brw+/etc/systemd/system/

sudo+sed+-i+'+s@ExecStart.*@ExecStart=/usr/bin/dockerd+$DOCKER_OPTS+-H+fd://@+'++/etc/systemd/system/docker.service
sudo+sed+-i+'/ExecStart/a+EnvironmentFile=-/etc/default/docker'+/etc/systemd/system/docker.service
sudo+systemctl+daemon-reload
sudo+systemctl+restart+docker
sudo+docker+info+%7C+grep+"Root+Dir"
#+now+they're+where+I+want+them|code-block|syntax|javascript|4608084|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

On an AWS Ubuntu 16.04 Server I put the Docker images on a separate EBS, mounted on /home/ubuntu/kaggle/, under the docker dir

This snippet of my initialization script worked correctly

<pre><code># where are the images initially stored?
sudo docker info | grep "Root Dir"
# ... not where I want them

# modify the configuration files to change to image location
# NOTE this generates an error
# WARNING: Usage of loopback devices is strongly discouraged for production use.
# Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
# see https://stackoverflow.com/questions/31620825/
# warning-of-usage-of-loopback-devices-is-strongly-discouraged-for-production-use

sudo sed -i ' s@#DOCKER_OPTS=.*@DOCKER_OPTS="-g /home/ubuntu/kaggle/docker"@ ' /etc/default/docker

sudo chmod -R ugo+rw /lib/systemd/system/docker.service
sudo cp /lib/systemd/system/docker.service /etc/systemd/system/
sudo chmod -R ugo+rw /etc/systemd/system/

sudo sed -i ' s@ExecStart.*@ExecStart=/usr/bin/dockerd $DOCKER_OPTS -H fd://@ ' /etc/systemd/system/docker.service
sudo sed -i '/ExecStart/a EnvironmentFile=-/etc/default/docker' /etc/systemd/system/docker.service
sudo systemctl daemon-reload
sudo systemctl restart docker
sudo docker info | grep "Root Dir"
# now they're where I want them
</code></pre>

blocks|key|4608109|text|浅谈openSUSE+Leap+42.1|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4608110|$cat+/etc/sysconfig/docker+
##+Path+++++++++++:+System/Management
##+Description++++:+Extra+cli+switches+for+docker+daemon
##+Type+++++++++++:+string
##+Default++++++++:+""
##+ServiceRestart+:+docker
#
DOCKER_OPTS="-g+/media/data/installed/docker"|code-block|syntax|javascript|4608111|注意，DOCKER_OPTS最初是空的，我所做的就是在参数中添加，让docker使用我的新目录|4608112|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

On openSUSE Leap 42.1

<pre><code>$cat /etc/sysconfig/docker 
## Path : System/Management
## Description : Extra cli switches for docker daemon
## Type : string
## Default : ""
## ServiceRestart : docker
#
DOCKER_OPTS="-g /media/data/installed/docker"
</code></pre>

Note that DOCKER_OPTS was initially empty and all I did was add in the argument to make docker use my new directory

blocks|key|4608209|text|正如@mbarthelemy建议的那样，这可以在直接启动docker守护进程时通过-g选项来完成。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4608210|但是，如果docker作为系统服务启动，则不建议修改/etc/default/docker文件。这里有一个关于这个here的指南。|4608211|正确的方法是在Linux+(或Mac)系统上创建一个/etc/docker/daemon.json文件，或者在Windows上创建一个%25programdata%25\docker\config\daemon.json。如果此文件未用于任何其他用途，则以下字段应已足够：|4608212|{
++++"graph":+"/docker/daemon_files"
}|code-block|syntax|javascript|4608213|这里假设您希望docker保存其数据的新位置为/docker/daemon_files|4608214|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.docker.com/v1.11/engine/reference/commandline/daemon/#daemon-configuration-file^0|15|2|0|Q|J|1L|4|0|0|Q|N|1V|13|0|0|N|K|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@$9|14|A|15|1|16]]|E|$]]|$1|H|3|I|5|6|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1C|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

As recommneded by @mbarthelemy this can be done via the <code>-g</code> option when starting the docker daemon directly. 

However, if docker is being started as a system service, it is not recommended to modify the <code>/etc/default/docker</code> file. There is a guideline to this located <a href="https://docs.docker.com/v1.11/engine/reference/commandline/daemon/#daemon-configuration-file" rel="noreferrer">here</a>. 

The correct approach is to create an <code>/etc/docker/daemon.json</code> file on Linux (or Mac) systems or <code>%programdata%\docker\config\daemon.json</code> on Windows. If this file is not being used for anything else, the following fields should suffice:

<pre><code>{
 "graph": "/docker/daemon_files"
}
</code></pre>

This is assuming the new location where you want to have docker persist its data is <code>/docker/daemon_files</code>

blocks|key|4608239|text|在Fedora+26和许多其他版本上，在如上所述移动基本文件夹位置后，您可能会遇到错误。如果您要将其移动到/home下的某个位置，这一点尤其正确。这是因为SeLinux起作用了，并阻止停靠容器在此位置下运行其许多程序。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4608240|简单的解决方案是在添加-g参数时删除--enable-selinux选项。|4608241|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

On Fedora 26 and probably many other versions, you may encounter an error after moving your base folder location as described above. This is particularly true if you are moving it to somewhere under /home. This is because SeLinux kicks in and prevents the docker container from running many of its programs from under this location.

The short solution is to remove the --enable-selinux option when you add the -g parameter.

blocks|key|101638|text|要做到这一点要容易得多：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|101639|停止docker服务|101640|sudo+systemctl+stop+docker|code-block|syntax|javascript|101641|将现有docker目录移动到新位置|101642|sudo+mv+/var/lib/docker/+/path/to/new/docker/|101643|创建符号链接|101644|sudo+ln+-s+/path/to/new/docker/+/var/lib/docker|101645|启动docker服务|101646|sudo+systemctl+start+docker|101647|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

<h3>Much easier way to do so:</h3>
Stop docker service
<pre><code>sudo systemctl stop docker
</code></pre>
Move existing docker directory to new location
<pre><code>sudo mv /var/lib/docker/ /path/to/new/docker/
</code></pre>
Create symbolic link
<pre><code>sudo ln -s /path/to/new/docker/ /var/lib/docker
</code></pre>
Start docker service
<pre><code>sudo systemctl start docker
</code></pre>

blocks|key|101671|text|我使用的是docker版本19.03.14。下面的链接帮助了我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|101672|Check+this+Link|offset|length|101673|在/etc/docker/daemon.json文件中，我添加了以下部分：-|101674|+{
++++"data-root":+"/hdd2/docker",
++++"storage-driver":+"overlay2"
+}|code-block|syntax|javascript|101675|entityMap|0|LINK|mutability|MUTABLE|url|https://blog.adriel.co.nz/2018/01/25/change-docker-data-directory-in-debian-jessie/^0|0|0|F|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

I was having docker version 19.03.14. Below link helped me.
<a href="https://blog.adriel.co.nz/2018/01/25/change-docker-data-directory-in-debian-jessie/" rel="nofollow noreferrer">Check this Link</a>
in /etc/docker/daemon.json file I added below section:-
<pre><code> {
 &quot;data-root&quot;: &quot;/hdd2/docker&quot;,
 &quot;storage-driver&quot;: &quot;overlay2&quot;
 }
</code></pre>

From what I can tell, docker images are installed to <code>/var/lib/docker</code> as they are pulled. Is there a way to change this location, such as to a mounted volume like <code>/mnt</code>?

How to change the docker image installation directory?

服务器

openSUSE

Windows

容器

Docker

CentOS

Ubuntu

Fedora

Linux

据我所知，docker镜像在被拉取时被安装到/var/lib/docker。是否有方法可以更改此位置，例如更改为已挂载的卷(如/mnt

问如何更改docker镜像安装目录？
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