DevOps Intermediate

Jenkins — Moderní Pipeline Patterns¶

JenkinsCI/CDPipelineAutomatizace 5 min read

Jenkins shared libraries, deklarativní pipeline, parallel stages a Kubernetes-based agents.

Shared Libraries¶

// vars/standardPipeline.groovy
def call(Map config = [:]) {
    pipeline {
        agent { kubernetes { yaml agentPod() } }
        stages {
            stage('Build') {
                steps { sh "docker build -t ${config.image}:${env.BUILD_NUMBER} ." }
            }
            stage('Test') {
                parallel {
                    stage('Unit') { steps { sh 'make test-unit' } }
                    stage('Integration') { steps { sh 'make test-integration' } }
                    stage('Lint') { steps { sh 'make lint' } }
                }
            }
            stage('Deploy') {
                when { branch 'main' }
                steps { sh "kubectl set image ..." }
            }
        }
    }
}

// Jenkinsfile
@Library('shared-pipeline') _
standardPipeline(image: 'registry/myapp', app: 'myapp')

Kubernetes Agents¶

pipeline {
    agent {
        kubernetes {
            yaml '''
apiVersion: v1
kind: Pod
spec:
  containers:
    - name: golang
      image: golang:1.22
      command: [sleep]
      args: [infinity]
    - name: docker
      image: docker:24-dind
      securityContext:
        privileged: true
'''
        }
    }
    stages {
        stage('Build') {
            steps { container('golang') { sh 'go build ./...' } }
        }
    }
}

Best Practices¶

• Deklarativní pipeline > skriptovací
• Shared libraries pro opakující se patterny
• Parallel stages pro rychlejší feedback
• K8s agents pro izolaci a škálovatelnost
• Credentials plugin pro secrets

Summary¶

Moderní Jenkins s shared libraries a K8s agents je stále silný CI/CD nástroj. Klíč je standardizace.

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