got some questions running project piper on Kubernetes. We did the setup like described in
https://sap.github.io/jenkins-library/guidedtour/
I assumed that a build will run "out-of-the-box"... but it isn't. Invoking a mtaBuild results in a message ... Cannot connect to docker daemon ... permission denied
Not sure if we have to set env variable ON_K8S. If we set it ... the build is waiting forever for a node to come up.
Is there any setup guide for Kubernetes? Do we have to configure a pod Template in the Jenkins configuration and work with container("container_name") in the Jenkinsfile ?
Is the Jenkins agent https://hub.docker.com/r/ppiper/jenkins-agent-k8s already preconfigured? Do we have to set it over env variable?
Updated answer:
The cx-server scripts are not made for running in Kubernetes, they are built for a "plain docker" setup (a linux server/vm with docker installed).
For scaling on Kubernetes, two options are available:
Using the jenkins master image in a pod as described in this blog post, or using it in a "plain docker" setup and optionally having additional agents on kubernetes.
Additional documentation on this topic is here