I recently did a setup of Jenkins that had to access git repositories via https on a server that only had a self signed certificate. Here are the bits and pieces that I had to configure.

Ignoring SSL warnings in git

Since all git traffic was internal I chose not to bother too much about this isssue and just disable http certificate checks in git. If you run the command

git config --global http.sslVerify true

an entry like this will be added to your .gitconfig:

    sslVerify = false

We’ll have to put this .gitconfig in a couple of places to enable Jenkins accessing the git server.

Jenkins master

Certain operations are performed on the master itself, e.g. scanning the repo for branches in multibranch pipelines. The .gitconfig mentioned above must be placed into /var/jenkins_home/.gitconfig on the master. In my case this was a Docker setup so I mounted the file into the container.

Jenkins worker

Before the first build step of a pipeline actually runs Jenkins does a git checkout on the worker node. Even if you choose to run your build inside a Docker container the checkout happens before the container is actually started. So the user running the Jenkins agent must be configured with the .gitconfig mentioned above, too.

Not covered here

I’m sure there are other places where a git checkout happens in Jenkins, e.g. if you do a checkout as part of a pipeline using the checkout() function in a Jenkinsfile. Since I don’t use that functionality right now I did not bother to go into details here.

Quick templating with gmaven and GStringTemplateEngine

16.06.2021 by Dirk Olmes

At work I have come across the requirement to generate some files based on the info in a pom.xml. Maven’s resource filtering feature would be the first thing that comes to mind but unfortunately it’s not powerful enough for my use case. I had to generate a …

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Creating a plain Eclipse project using JPMS and JUnit tests

27.07.2020 by Dirk Olmes

I use the Eclipse IDE as my daily driver for development. For a long time I have ignored the Java Platform Module System (JPMS) which was introduced in Java 9 and I’m still ignoring it today. If you want a proper module system simply use the better one that …

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Kotlin multiline strings vs the $ character

12.06.2020 by Dirk Olmes

I recently started to use Kotlin for small projects at work. At first I was very pleased with the language but the more I use it the more I’m stubling over things that are not nice.

I’ll rumble about the braindead constructor syntax or the epic autoboxing fail …

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11.05.2020 by Dirk Olmes

At work we’re using Sonar to keep our code quality under control. One integral part of code quality is test coverage and Sonar offers coverage metrics in the UI. However, the Sonar docs on code coverage are a bit sparse (at best) and don’t tell you the exact …

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Filtering spam mails with bogofilter

22.03.2020 by Dirk Olmes

I’m running a Postfix server here at home to process incoming mail. To integrate spam filtering I’m delivering mails via procmail - it’s as simple as setting mailbox_command = /usr/bin/procmail in postfix’ main.cf.

Spam filtering works by invoking the filter (bogofilter in my case) from procmail …

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Deploying files with maven-deploy-plugin

11.02.2019 by Dirk Olmes

We recently had an outage of our Nexus instance at work. The file system went corrupt, nexus would not start up properly complaining about a corrupted Orient DB.

The blob store was largely left intact. In hindsight I should have tried to rebuild the OrientDB from the blob store using …

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Fixing the dreaded “problem with defaults entries” in debian

29.09.2018 by Dirk Olmes

At work we host a number of Debian VMs. Most of them are integrated into the central active directory server using the sssd package.

Quite unrelatedly my boss kept nagging me about incoming emails to root that looked like this

Subject: *** SECURITY information for <host> ***

<host> : Sep 29 05:45 …
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Chromecasting using a custom Chromium build

23.01.2018 by Dirk Olmes

I’m using Gentoo as my Linux distro of choice. Gentoo compiles everything from source giving you a maximum flexibility - but that’s another story.

At work we’re traditionally an Apple shop - with some exceptions including me. We have an Apple TV device and a big TV screen in …

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Setting up a software RAID1

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I’m helping a friend to set up a machine with Gentoo. This will be a machine to host production applications and it is equipped with 2 identical hard drives. I will set up a software RAID 1. This has been a life saver on a similar machine before where …

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