Symlink plugins instead of copying them #49
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hrishin
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We want to save some space on gluster mount and we want to use more on the image
instead which is volatile.
In a nutshell this is what we do :
- We uncompress the jpi/hpi in the image directly.
- We symlinks the hpi and jpi into /var/lib/jenkins/plugins at (*every*) boot time
- We symlinks the /var/lib/jenkins/plugins/${PLUGIN_NAME}/WEB-INF
- We let jenkins do its magic for the other files.
Now there is one caveat here, to let it does its magic, jenkins does a bunch of
things to uncompress and update stuff and that's not a behavior that it seems
possible to disable.
So we let jenkins do that at the first boot which will have a 215mb for the
jenkins plugins. On the next reboot we will overwrite all of the WEB-INF (which
is the dirs will the contents) with the one from the image.
Jenkins is fooled and we are down 29mb for /var/lib/jenkins/plugins
Since we are using plugins from the image we should be okay with updates (to be
checked).
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Part of openshiftio/openshift.io#4568