Custom Jenkins images

So far, we have used the Jenkins images pulled from the internet. We used jenkins for the master container and evarga/jenkins-slave for the slave container. However, we may want to build our own images to satisfy the specific build environment requirements. In this section, we cover how to do it.

Building Jenkins slave

Let's start from the slave image, because it's more often customized. The build execution is performed on the agent, so it's the agent that needs to have the environment adjusted to the project we would like to build. For example, it may require the Python interpreter if our project is written in Python. The same is applied to any library, tool, testing framework, or anything...