Jenkins StatefulSet Deployment on Kubernetes

This repository contains the configuration files to deploy a Jenkins master as a Kubernetes StatefulSet with an integrated Horizontal Pod Autoscaler (HPA).

Overview

This configuration deploys a Jenkins master node using the following Kubernetes resources:

• StatefulSet: Ensures consistent pod identity and persistent storage for Jenkins data.
• Horizontal Pod Autoscaler (HPA): Monitors CPU utilization and adjusts the number of replicas accordingly.

Prerequisites

• A Kubernetes cluster with kubectl configured.
• A PersistentVolumeClaim (PVC) named jenkins-home to store Jenkins data.
• A service account named jenkins-service-account with the necessary permissions.

Deployment Details

StatefulSet Configuration

• Name: jenkins-standalone-statefulset
• Service Name: jenkins-service
• Image: jenkins/jenkins:lts
• Replicas: 1
• Volume: Persistent storage mounted at /var/jenkins_home.

Probes

• Liveness Probe: Ensures the Jenkins master pod is running.
• Readiness Probe: Ensures the pod is ready to serve traffic.

Resource Requests and Limits

• Requests: 512Mi memory, 500m CPU
• Limits: 1Gi memory, 1 CPU

Security Context

• fsGroup: 1000
• runAsUser: 1000

Horizontal Pod Autoscaler Configuration

• Name: jenkins-hpa
• Target Resource: The Jenkins StatefulSet.

Scaling Parameters

• Minimum replicas: 1
• Maximum replicas: 1 (can be increased based on workload requirements).
• Target CPU Utilization: 80%

Deployment Steps

Apply the PersistentVolumeClaim (PVC) for Jenkins data

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: jenkins-home
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi