在Docker中安装Jenkins插件（Mercurial）显示在plugins文件夹中，而不显示在Jenkins本身中

Question

Problem: I can't seem to successfully install the mercurial plugin to jenkins using the Dockerfile and plugins.txt combination.

What I've done so far:

I have a Dockerfile that's loading Jenkins. It has the following lines:

FROM jenkins:1.642.1
COPY plugins.txt /usr/share/jenkins/plugins.txt
RUN /usr/local/bin/plugins.sh /usr/share/jenkins/plugins.txt

My plugins.txt has this line:

mercurial:1.54

When I build the image and run the container, everything seems to work, there are no errors or complaints. But the Mercurial plugin isn't marked as installed when I go to Manage Plugins, and if I try to make a build, Mercurial isn't an option under Source Code Management.

I've tried going to:

<jenkins ip address>:8080/reload

As well as the "Reload Configuration from Disk" option in Manage Jenkins. Mercurial still isn't visibly installed after either of these.

I've also done this on the command line:

docker exec -i -t container bash
ls /var/jenkins_home/plugins/

And at this point I'm totally confused, because there's mercurial, mercurial.jpi and mercurial.jpi.pinned right there in the list. Does anyone have any ideas on this? I would like to have Mercurial installed on Jenkins as soon as it's loaded from the Dockerfile without having to do it manually...

Also, I tried doing this with git-changelog as well to see if another plugin would work better, and had the same result.

Answer 1

As you can see on the Mercurial Plugin wiki page , the plugin currently has four mandatory dependencies, and one optional:

• credentials
• matrix-project
• multiple-scms (optional)
• ssh-credentials
• scm-api

The plugin installation mechanism that you're using with the Jenkins Docker image does not automatically install dependent plugins for you, as mentioned in the documentation for the jenkins image :

All plugins need to be listed as there is no transitive dependency resolution.

Therefore you need to additionally list those plugins, and any of their transitive dependencies, in your plugins.txt file.

At the moment, the simplest way to get the full list would be to start your container (potentially without plugins.txt ), and then install the Mercurial plugin via the Plugin Manager, which will be installed along with all of its dependencies. Then you can see a list of which plugins are required via $JENKINS_HOME/plugins .