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Advanced Jenkins setup: Creating Jenkins configuration as code and setting up Kubernetes plugin

This blog post demonstrates how anything in Jenkins could be configured as a code through Java API using groovy code, and how changes could be applied right inside Jenkins job. I particularly will demo how to configure Kubernetes plugin and credentials, but the same concept could be used later to configure any Jenkins plugin you are interested in. We will also look at how to create custom config which could be used either for all
or only specific Jenkins instances so you can setup different instances differently based on security policy or any other criteria.

The Why…

Recently I have been working on a task to improve deployment of our master Jenkins instances on Kubernetes.
On of the requirements was to improve the speed, as we have more than 40 Jenkins masters running on different
environments like test, dev, pre-prod, perf, prod etc and deployed in Kubernetes over AWS cluster. The deployment job took around an hour, involved downtime and required multiple steps.

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