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kubernetes/jenkins/README.md

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Jenkins in Kubernetes

Kubernetes Setup

Configure Jenkins resources:

ln imagepull-gitea jenkins/.dockerconfigjson
kubectl apply -k jenkins

Jenkins Setup

Install Kubernetes plugin.

Set TCP port for inbound agents setting (Manage Jenkins → Configure Global Security) to Fixed and enter 40414.

Configure Kubernetes (Manage Jenkins → Manage Nodes and Clouds → Configure Clouds:

  1. Add a new cloud → Kubernetes
  2. Enter a name
  3. Kubernetes Cloud details...
    • Kubernetes URL: (leave blank; will use Kubernetes service discovery)
    • Kubernetes Namespace: jenkins-jobs
    • Credentials: - none - (will use Service Account token)
    • Jenkins tunnel: jenkins.jenkins.svc.cluster.local: (trailing colon!)

iSCSI Persistent Volume

Because of the large size of the Jenkins volume, it does not work well managed by Longhorn. Instead, we use a pre-provisioned iSCSI volume on the Synology NAS. This improves performance and avoids keeping multiple replicas of the Jenkins data, while still benefiting from snapshots, etc.