blocks|key|4405220|text|我认为docker最近在docker构建中添加了--add-host标志，这真的很棒。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4405221|编辑以便在17.04.0-ce上更新此要素|4405222|有关如何使用带有--add-host标志的docker+build的更多详细信息，请访问：https://docs.docker.com/edge/engine/reference/commandline/build/|4405223|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.docker.com/release-notes/docker-ce/#17040-ce-2017-04-05|1|https://docs.docker.com/edge/engine/reference/commandline/build/^0|O|A|0|5|A|0|0|8|A|L|C|19|1S|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|H|3|I|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@$9|15|A|16|1|17]]|E|$]]|$1|J|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]|R|$5|M|N|O|E|$P|S]]]]

I think docker recently added the <code>--add-host</code> flag to docker build which is really great.

[Edit]
So this feature was updated on <a href="https://docs.docker.com/release-notes/docker-ce/#17040-ce-2017-04-05" rel="noreferrer">17.04.0-ce</a>

For more detail on how to use <code>docker build</code> with the <code>--add-host</code> flag please visit: <a href="https://docs.docker.com/edge/engine/reference/commandline/build/" rel="noreferrer">https://docs.docker.com/edge/engine/reference/commandline/build/</a>

blocks|key|4405260|text|由于这仍然是谷歌的第一个答案，我将贡献可能的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4405261|来自here的命令令人惊讶地为我工作(Docker1.13.1，Ubuntu16.04)：|offset|length|4405262|docker+exec+-u+0+<container-name>+/bin/sh+-c+"echo+'<ip>+<name>+>>+/etc/hosts"|code-block|syntax|javascript|4405263|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/moby/moby/issues/15604#issuecomment-131360708^0|0|2|4|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@$D|U|E|V|1|W]]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Since this still comes up as a first answer in Google I'll contribute possible solution.

Command taken from <a href="https://github.com/moby/moby/issues/15604#issuecomment-131360708" rel="noreferrer">here</a> suprisingly worked for me (Docker 1.13.1, Ubuntu 16.04) :

<pre><code>docker exec -u 0 &lt;container-name&gt; /bin/sh -c "echo '&lt;ip&gt; &lt;name&gt; &gt;&gt; /etc/hosts"
</code></pre>

blocks|key|4405298|text|您可以在运行docker时使用以下命令|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4405299|docker+run+[OPTIONS]+--add-host+example.com:127.0.0.1+<your-image-name>:<your+tag>|offset|length|style|CODE|4405300|在这里，我将example.com映射到本地主机127.0.0.1及其工作方式。|4405301|entityMap^0|0|0|2A|0|6|B|O|9|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@$D|Q|E|R|F|G]|$D|S|E|T|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|K|$]]

You can do with the following command at the time of running docker

<code>docker run [OPTIONS] --add-host example.com:127.0.0.1 &lt;your-image-name&gt;:&lt;your tag&gt;</code>

Here I am mapping <code>example.com</code> to localhost <code>127.0.0.1</code> and its working.

blocks|key|4405379|text|如果这对任何人都有用，那么HOSTALIASES环境变量对我也适用：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4405380|echo+"fakehost+realhost"+>+/etc/host.aliases
export+HOSTALIASES=/etc/host.aliases|code-block|syntax|javascript|4405381|entityMap^0|D|B|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

If this is useful for anyone, the <code>HOSTALIASES</code> env variable worked for me:

<pre><code>echo "fakehost realhost" &gt; /etc/host.aliases
export HOSTALIASES=/etc/host.aliases
</code></pre>

blocks|key|4405322|text|我刚刚创建了一个sh脚本，并在start+docker上运行它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4405323|在此脚本中，我启动了所有服务并更新了hosts文件：|4405324|在Dockerfile上：|4405325|CMD+/tmp/init_commands.sh+&+sleep+infinity+|code-block|syntax|javascript|4405326|init_comands.sh|4405327|any+other+commands...
echo+"192.168.11.5++++XXXXXXX"+>>+/etc/hosts
echo+"192.168.11.6++++XXXXXXY"+>>+/etc/hosts
echo+"192.168.11.7++++XXXXXXZ"+>>+/etc/hosts|4405328|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|T|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I just created a sh script and run it on start docker.
In this script I start all the services and update the hosts file:
on Dockerfile:
<pre><code>CMD /tmp/init_commands.sh &amp; sleep infinity 
</code></pre>
init_comands.sh
<pre><code>any other commands...
echo &quot;192.168.11.5 XXXXXXX&quot; &gt;&gt; /etc/hosts
echo &quot;192.168.11.6 XXXXXXY&quot; &gt;&gt; /etc/hosts
echo &quot;192.168.11.7 XXXXXXZ&quot; &gt;&gt; /etc/hosts
</code></pre>

blocks|key|4405121|text|下面的方法在docker运行期间挂载文件，而不是docker+build。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4405122|docker+service+create+--name+<name>++--mount+type=bind,source=/etc/hosts,dst=/etc/hosts+++<image>|code-block|syntax|javascript|4405123|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Following worked for me by mounting the file during docker run instead of docker build

<pre><code>docker service create --name &lt;name&gt; --mount type=bind,source=/etc/hosts,dst=/etc/hosts &lt;image&gt;
</code></pre>

blocks|key|4405257|text|使用以下命令快速运行您的容器：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4405258|docker+exec+-it+<container+name>+/bin/bash|code-block|syntax|javascript|4405259|打开容器后：|4405260|cd+..|4405261|然后|4405262|`cd+etc`|4405263|然后你就可以|4405264|cat+hosts|4405265|或者：|4405266|apt-get+update
apt-get+vim|4405267|或任何你喜欢的编辑器，并在vim中打开它，在这里你可以修改你的启动ip为0.0.0.0|4405268|entityMap^0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|16|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|18|8|@]|9|@]|A|$]]|$1|U|3|V|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|W|3|X|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|Z|$]]

Just a quick answer to run your container using:

<pre><code>docker exec -it &lt;container name&gt; /bin/bash
</code></pre>

once the container is open:

<pre><code>cd ..
</code></pre>

then

<pre><code>`cd etc`
</code></pre>

and then you can

<pre><code>cat hosts
</code></pre>

or:

<pre><code>apt-get update
apt-get vim
</code></pre>

or any editor you like and open it in vim, here you can modify say your startup ip to 0.0.0.0

I want to update my <code>/etc/hosts</code> file during "docker build".

I added below line in Dockerfile but it's neither updating <code>/etc/hosts</code> file nor giving any error.

<pre><code>RUN echo "192.168.33.11 mynginx" &gt;&gt; /etc/hosts
</code></pre>

I need to update <code>/etc/hosts</code>. Can anyone suggest on this?

How to update /etc/hosts file in Docker image during "docker build"

我想在"docker build“期间更新我的/etc/hosts文件。我在Dockerfile中添加了下面的行，但它既没有更新/etc/hosts文件，也没有给出任何错误。RUN echo "192.168.33.11    mynginx" >> /etc/hosts我需要更新/etc/hosts。有人能对此提出建议吗？

问如何在Docker build过程中更新docker镜像中的/etc/hosts文件
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