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Hongli Lai (Phusion)
2014-02-02 14:18:33 +01:00
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@@ -270,6 +272,25 @@ CMD ["/sbin/my_init"]
# Clean up APT when done.
RUN apt-get clean &amp;&amp; rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*</pre>
<h2>Adding additional daemons</h2>
<p>You can add additional daemons (e.g. your own app) to the image by creating runit entries. You only have to write a small shell script which runs your daemon, and runit will keep it up and running for you, restarting it when it crashes, etc.</p>
<p>The shell script must be called <code>run</code>, must be executable, and is to be placed in the directory <code>/etc/service/&lt;NAME&gt;</code>.</p>
<p>Here's an example showing you how to a memached server runit entry can be made.</p>
<pre>### In memcached.sh (make sure this file is chmod +x):
#!/bin/sh
# `chpst` is part of running. `chpst -u memcache` runs the given command
# as the user `memcache`. If you omit this, the command will be run as root.
exec chpst -u memcache /usr/bin/memcached >>/var/log/memcached.log 2&gt;&amp;1
### In Dockerfile:
RUN mkdir /etc/service/memcached
ADD memcached.sh /etc/service/memcached/run</pre>
<p>Note that the shell script must run the daemon <em>without letting it daemonize/fork it</em>. Usually, daemons provide a command line flag or a config file option for that.</p>
<h2>More documentation</h2>
<p>This website only covers the basics. Please refer to <a href="https://github.com/phusion/baseimage-docker#readme">the Github repository</a> for more documentation. Topics include:</p>
<ul>
@@ -278,11 +299,14 @@ RUN apt-get clean &amp;&amp; rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*</pre>
<li>Instructions on logging into the container</li>
</ul>
<h2>Relevant links</h2>
<ul>
<li>Using baseimage-docker? <a href="https://twitter.com/share">Tweet about us</a> or <a href="https://twitter.com/phusion_nl">follow us on Twitter</a>.</li>
<li>Having problems? Want to participate in development? Please post a message at <a href="https://groups.google.com/d/forum/passenger-docker">the discussion forum</a>.</li>
</ul>
<p>Having problems? Want to participate in development? Please post a message at <a href="https://groups.google.com/d/forum/passenger-docker">the discussion forum</a>.</p>
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@@ -309,7 +333,13 @@ RUN apt-get clean &amp;&amp; rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*</pre>
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