Jenkins

Jenkins Logo

Jenkins is an open-source automation server that enables continuous integration and continuous delivery (CI/CD) for software development projects.

Overview

Jenkins provides robust automation capabilities: - Build Automation - Compile and test code automatically - Deployment Pipeline - Create sophisticated deployment workflows - Plugin Ecosystem - Extend functionality through thousands of plugins

Key Features

Feature	Description
Pipeline as Code	Define pipelines using Jenkinsfile
Plugin System	Extensive plugin ecosystem
Distributed Builds	Scale with master/agent architecture
Security Features	Built-in security and authentication

Integration with Fawkes

Prerequisites

Docker or Kubernetes cluster
Helm (for Kubernetes deployment)
kubectl configured with cluster access

Installation

# Using Helm
helm repo add jenkins https://charts.jenkins.io
helm repo update

# Install Jenkins
helm install jenkins jenkins/jenkins \
  --namespace jenkins \
  --create-namespace \
  --values jenkins-values.yaml

Example jenkins-values.yaml:

controller:
  ingress:
    enabled: true
    hostName: jenkins.fawkes.local
  adminPassword: "your-secure-password"

persistence:
  enabled: true
  size: 10Gi

serviceAccount:
  create: true
  annotations:
    eks.amazonaws.com/role-arn: arn:aws:iam::123456789012:role/jenkins-role

Configuring Jenkins Pipelines

Basic Pipeline Example

// Jenkinsfile
pipeline {
    agent any

    stages {
        stage('Build') {
            steps {
                sh 'mvn clean package'
            }
        }
        stage('Test') {
            steps {
                sh 'mvn test'
            }
        }
        stage('Deploy') {
            steps {
                sh 'kubectl apply -f k8s/'
            }
        }
    }

    post {
        always {
            junit '**/target/surefire-reports/TEST-*.xml'
        }
    }
}

Advanced Pipeline with Fawkes Integration

// Jenkinsfile for Fawkes deployment
pipeline {
    agent {
        kubernetes {
            yaml '''
                apiVersion: v1
                kind: Pod
                spec:
                  containers:
                  - name: maven
                    image: maven:3.8.4-openjdk-11
                    command:
                    - cat
                    tty: true
                  - name: kubectl
                    image: bitnami/kubectl
                    command:
                    - cat
                    tty: true
            '''
        }
    }

    stages {
        stage('Build & Test') {
            steps {
                container('maven') {
                    sh 'mvn clean verify'
                }
            }
        }

        stage('Deploy to Kubernetes') {
            steps {
                container('kubectl') {
                    sh '''
                        kubectl apply -f k8s/
                        kubectl rollout status deployment/fawkes-app
                    '''
                }
            }
        }
    }
}

Best Practices

Pipeline as Code
Store Jenkinsfile in version control
Use declarative pipeline syntax
Keep pipelines simple and modular
Security
Use credentials management
Implement role-based access control
Regular security updates
Performance
Use agent nodes for distribution
Clean workspace regularly
Optimize build steps

Troubleshooting

Common issues and solutions:

Issue	Solution
Pipeline fails to start	Check Jenkins agent connectivity
Build fails	Verify build tool configuration
Deployment fails	Check Kubernetes credentials

Monitoring Jenkins

# Prometheus configuration
- job_name: 'jenkins'
  metrics_path: /prometheus
  static_configs:
    - targets: ['jenkins.fawkes.local:8080']

Additional Resources

Configure Jenkins View Examples