Running Jenkins in Docker

Start Jenkins container witth the following command:

docker run -d \
  --name jenkins-server \
  -p 8080:8080 \
  -p 50000:50000 \
  -v /opt/jenkins/data:/var/jenkins_home \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v $(which docker):/usr/local/bin/docker \
  -e TZ=UTC \
  jenkins/jenkins:lts

Directory Setup and Permissions

Configure host directory permissions:

# Create and set up Jenkins data directory
sudo mkdir -p /opt/jenkins/data
sudo chown -R 1000:1000 /opt/jenkins/data
sudo chmod -R 755 /opt/jenkins/data

CI/CD Pipeline Configurasion

Define the pipeline script:

pipeline {
    agent any
    environment {
        DOCKER_IMAGE = "myapp"
        VERSION = "${env.BUILD_NUMBER}"
        REGISTRY_AUTH = 'registry-credentials'
    }
    stages {
        stage('Source Code') {
            steps {
                git branch: 'main',
                    credentialsId: 'git-access',
                    url: 'https://github.com/user/repository.git'
            }
        }
        
        stage('Build Application') {
            steps {
                script {
                    docker.image('mcr.microsoft.com/dotnet/sdk:6.0').inside('-u root -v /var/jenkins_home/workspace:/workspace') {
                        dir('src') {
                            sh 'dotnet restore'
                            sh 'dotnet build -c Release'
                            sh 'dotnet publish -c Release -o output'
                        }
                    }
                }
            }
        }
        
        stage('Containerize and Upload') {
            steps {
                script {
                    docker.withRegistry('https://registry.example.com', "${REGISTRY_AUTH}") {
                        def containerImage = docker.build("${DOCKER_IMAGE}:${VERSION}", "./")
                        containerImage.push()
                    }
                }
            }
        }
    }
}

Automated Deployment Stage

Add deployment stage for automatic updates:

stage('Deploy to Server') {
    steps {
        script {
            sh """
            docker stop running-app || true
            docker rm running-app || true
            docker pull ${DOCKER_IMAGE}:${VERSION}
            docker run -d \
                --name running-app \
                --restart unless-stopped \
                -p 80:8080 \
                ${DOCKER_IMAGE}:${VERSION}
            """
        }
    }
}

For producsion servers, simply pull and run the latest container image.