Jenkins End to End Pipeline

Install Jenkins

helm repo add jenkins https://charts.jenkins.io
helm repo update
helm pull jenkins/jenkins --untar

Run

helm upgrade --install jenkins jenkins/

or install without making any changes to the chart by running

helm upgrade --install jenkins jenkins/jenkins --set controller.servicePort=80 --set controller.serviceType=LoadBalancer

Get password

kubectl exec -it jenkins-0 -- bash
cat /run/secrets/additional/chart-admin-password

Install SonarQube

https://artifacthub.io/packages/helm/sonarqube/sonarqube

helm repo add sonarqube https://SonarSource.github.io/helm-chart-sonarqube
helm repo update
helm pull sonarqube/sonarqube --untar

Run

helm upgrade --install sonarqube sonarqube/

Password: admin

Install Nexus

https://artifacthub.io/packages/helm/sonatype/nexus-repository-manager

helm repo add sonatype https://sonatype.github.io/helm3-charts/
helm repo update
helm pull sonatype/nexus-repository-manager --untar

Run

helm upgrade --install nexus nexus-repository-manager/

Get Password

kubectl exec -it nexus-nexus-repository-manager-5745766765-5pjcf -- bash
cat /nexus-data/admin.password

Install Mailhog

helm repo add codecentric https://codecentric.github.io/helm-charts
helm repo update
helm pull codecentric/mailhog --untar
helm upgrade --install mail mailhog/

PVC for Maven Cache

https://kubernetes.io/docs/concepts/storage/persistent-volumes/

apiVersion: v1
kind: PersistentVolumeClaim
metadata: 
  name: maven-cache
spec: 
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

Pipeline Steps Snippets

Agent Template

https://plugins.jenkins.io/kubernetes/

kubernetes {
    yaml '''
        apiVersion: v1
        kind: Pod
        metadata:
          labels:
            app: test
        spec:
          containers:
          - name: maven
            image: maven:3.8.3-adoptopenjdk-11
            command:
            - cat
            tty: true
          - name: git
            image: bitnami/git:latest
            command:
            - cat
            tty: true
    '''
}

Build Options

https://www.jenkins.io/doc/book/pipeline/syntax/#options

options {
      buildDiscarder logRotator(daysToKeepStr: '2', numToKeepStr: '10')
      timeout(time: 10, unit: 'MINUTES')
}

Git clone

git url: 'https://github.com/kunchalavikram1427/spring-petclinic.git',
branch: 'main'

Maven Build

mvn -Dmaven.test.failure.ignore=true clean package

Build Image

docker build -t $IMAGE_NAME:$IMAGE_TAG .
docker tag $IMAGE_NAME:$IMAGE_TAG $IMAGE_NAME:latest

Sonar Stage

https://docs.sonarqube.org/latest/analysis/scan/sonarscanner/ https://www.jenkins.io/doc/pipeline/steps/sonar/

withSonarQubeEnv(credentialsId: 'CREDS', installationName: 'SONARSERVER') { 
    sh '''/opt/sonar-scanner/bin/sonar-scanner \
      -Dsonar.projectKey=petclinic \
      -Dsonar.projectName=petclinic \
      -Dsonar.projectVersion=1.0 \
      -Dsonar.sources=src/main \
      -Dsonar.tests=src/test \
      -Dsonar.java.binaries=target/classes  \
      -Dsonar.language=java \
      -Dsonar.sourceEncoding=UTF-8 \
      -Dsonar.java.libraries=target/classes
      '''
}

Wait for QG

https://www.jenkins.io/doc/pipeline/steps/sonar/

timeout(time: 1, unit: 'MINUTES') {
    waitForQualityGate abortPipeline: true
}

Nexus Stage

https://blog.sonatype.com/workflow-automation-publishing-artifacts-to-nexus-using-jenkins-pipelines

script {
    pom = readMavenPom file: "pom.xml";
    filesByGlob = findFiles(glob: "target/*.${pom.packaging}"); 
    echo "${filesByGlob[0].name} ${filesByGlob[0].path} ${filesByGlob[0].directory} ${filesByGlob[0].length} ${filesByGlob[0].lastModified}"
    artifactPath = filesByGlob[0].path;
    artifactExists = fileExists artifactPath;
    if(artifactExists) {
        echo "*** File: ${artifactPath}, group: ${pom.groupId}, packaging: ${pom.packaging}, version ${pom.version}";
        nexusArtifactUploader(
            nexusVersion: NEXUS_VERSION,
            protocol: NEXUS_PROTOCOL,
            nexusUrl: NEXUS_URL,
            groupId: pom.groupId,
            version: pom.version,
            repository: NEXUS_REPOSITORY,
            credentialsId: NEXUS_CREDENTIAL_ID,
            artifacts: [
                [artifactId: pom.artifactId,
                classifier: '',
                file: artifactPath,
                type: pom.packaging],

                [artifactId: pom.artifactId,
                classifier: '',
                file: "pom.xml",
                type: "pom"]
            ]
        );

    } else {
        error "*** File: ${artifactPath}, could not be found";
    }
}

Nexus Push via cURL

https://support.sonatype.com/hc/en-us/articles/115006744008-How-can-I-programmatically-upload-files-into-Nexus-3-

withCredentials([usernamePassword(credentialsId: 'CREDS', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
    sh "curl -v -u $USER:$PASS --upload-file target/${pom.artifactId}-${pom.version}.${pom.packaging} \
    http://NEXUS-SERVER-URL/repository/maven-hosted/org/springframework/samples/${pom.artifactId}/${pom.version}/${pom.artifactId}-${pom.version}.${pom.packaging}"
}

Sending status to Github

https://docs.github.com/en/rest/commits/statuses#create-a-commit-status Install Generic webhook trigger plugin ACTION $.action HEAD $.pull_request.head.ref BASE $.pull_request.base.ref SHA_ID $.pull_request.head.sha Expression ^opened dev master$ Text $action $head $base

withCredentials([string(credentialsId: 'TOKEN', variable: 'TOKEN')]) {
    sh "curl -u kunchalavikram1427:$TOKEN -X POST 'https://api.github.com/repos/kunchalavikram1427/spring-petclinic/statuses/$SHA_ID' -H 'Accept: application/vnd.github.v3+json' -d '{\"state\": \"success\",\"context\": \"Maven Build\", \"description\": \"Jenkins\", \"target_url\": \"$JENKINS_URL/job/$JOB_NAME/$BUILD_NUMBER/console\"}' "
}

In function form

void sendStatus(String stage, String status) {
    container('curl') {
        withCredentials([string(credentialsId: 'TOKEN', variable: 'TOKEN')]) {
            sh "curl -u kunchalavikram1427:$TOKEN -X POST 'https://api.github.com/repos/kunchalavikram1427/spring-petclinic/statuses/$SHA_ID' -H 'Accept: application/vnd.github.v3+json' -d '{\"state\": \"$status\",\"context\": \"$stage\", \"description\": \"Jenkins\", \"target_url\": \"$JENKINS_URL/job/$JOB_NAME/$BUILD_NUMBER/console\"}' "
        }
    }
}

Call function

sendStatus("Push to Nexus","success")
sendStatus("Deployment","failure")

Helm Deployment

https://plugins.jenkins.io/kubernetes-cli/

withKubeConfig(caCertificate: '', clusterName: '', contextName: '', credentialsId: 'KUBECONFIG', namespace: '', serverUrl: '') {
    sh "helm upgrade --install petclinic petclinic-chart/"
}

Post Build Actions

https://www.jenkins.io/doc/book/pipeline/syntax/#post https://plugins.jenkins.io/mailer/

post {
    failure {
        mail to: '[email protected]',
        from: '[email protected]',
        subject: "Jenkins pipeline has failed for job ${env.JOB_NAME}",
        body: "Check build logs at ${env.BUILD_URL}"
    }
    success {
        mail to: '[email protected]',
        from: '[email protected]',
        subject: "Jenkins pipeline for job ${env.JOB_NAME} is completed successfully",
        body: "Check build logs at ${env.BUILD_URL}"
    }
}

Dockerfile to build petclinic project docker image

FROM openjdk:8-jre-alpine
EXPOSE 8080
COPY target/*.war /usr/bin/spring-petclinic.war
ENTRYPOINT ["java","-jar","/usr/bin/spring-petclinic.war","--server.port=8080"]

Dockerfile to build custom image with helm and kubectl cli tools

Image available in Dockerhub as: kunchalavikram/kubectl_helm_cli:latest

FROM alpine/helm
RUN curl -LO https://dl.k8s.io/release/v1.25.0/bin/linux/amd64/kubectl \
    && mv kubectl /bin/kubectl \
    && chmod a+x /bin/kubectl

Kubernetes Deployment & Service files

apiVersion: apps/v1
kind: Deployment
metadata:
  name: petclinic
  labels:
    app: petclinic
spec:
  replicas: 1
  selector:
    matchLabels:
      app: petclinic
  template:
    metadata:
      labels:
        app: petclinic
    spec:
      containers:
      - name: petclinic
        image: kunchalavikram/spring-petclinic:latest
        ports:
        - containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: petclinic
spec:
  type: LoadBalancer
  selector:
    app: petclinic
  ports:
    - port: 80
      targetPort: 8080

Creating and using Helm hosted repository in Nexus

Upload Helm chart

helm package <folder-name>
curl -u admin:admin123 http://NEXUS-URL/repository/HELM-REPO-NAME/ --upload-file petclinic-chart-0.1.0.tgz -v

Adding Hosted Repo

helm repo add helm-hosted http://admin:admin123@NEXUS-URL/repository/HELM-REPO-NAME/
helm repo update

Fetching Charts from Nexus

helm repo update
helm pull helm-hosted/petclinic-chart

Plugins to use

https://plugins.jenkins.io/pipeline-stage-view/
https://plugins.jenkins.io/nexus-artifact-uploader/
https://plugins.jenkins.io/pipeline-utility-steps/
https://plugins.jenkins.io/junit/
https://plugins.jenkins.io/kubernetes-cli/
https://plugins.jenkins.io/sonar/
https://plugins.jenkins.io/generic-webhook-trigger/

Extras

Use these parameters if invoking Sonar Maven Plugin

-Dsonar.host.url=http://SONAR-URL
-Dsonar.login=sqp_dfe411bbe58dfba863f942c6b5fcac2f79e7db1a

References

https://github.com/jenkinsci/kubernetes-plugin/tree/master/examples
https://help.sonatype.com/repomanager3/nexus-repository-administration/formats/docker-registry/ssl-and-repository-connector-configuration
https://support.sonatype.com/hc/en-us/articles/217542177?_ga=2.135356529.1307852621.1661838709-1983751057.1661838709

Author

Vikram K (www.youtube.com/c/devopsmadeeasy)

Name		Name	Last commit message	Last commit date
Latest commit History 38 Commits
kubernetes-manifests		kubernetes-manifests
petclinic-chart		petclinic-chart
Jenkinsfile		Jenkinsfile
README.md		README.md
maven-pvc.yml		maven-pvc.yml

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Repository files navigation

Jenkins End to End Pipeline

Install Jenkins

Install SonarQube

Install Nexus

Install Mailhog

PVC for Maven Cache

Pipeline Steps Snippets

Agent Template

Build Options

Git clone

Maven Build

Build Image

Sonar Stage

Wait for QG

Nexus Stage

Nexus Push via cURL

Sending status to Github

Helm Deployment

Post Build Actions

Dockerfile to build petclinic project docker image

Dockerfile to build custom image with helm and kubectl cli tools

Kubernetes Deployment & Service files

Creating and using Helm hosted repository in Nexus

Plugins to use

Extras

References

Author

About

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kvsvishnusaikvs/jenkins-end-to-end-pipeline

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Repository files navigation

Jenkins End to End Pipeline

Install Jenkins

Install SonarQube

Install Nexus

Install Mailhog

PVC for Maven Cache

Pipeline Steps Snippets

Agent Template

Build Options

Git clone

Maven Build

Build Image

Sonar Stage

Wait for QG

Nexus Stage

Nexus Push via cURL

Sending status to Github

Helm Deployment

Post Build Actions

Dockerfile to build petclinic project docker image

Dockerfile to build custom image with helm and kubectl cli tools

Kubernetes Deployment & Service files

Creating and using Helm hosted repository in Nexus

Plugins to use

Extras

References

Author

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