1. Pull the Jenkins Docker image.

docker pull jenkins/jenkins

2. Set up a persistent storage directory on the host and adjust permissions.

mkdir -p /var/jenkins_data
chmod 777 /var/jenkins_data

3. Launch a Jenkins container with custom configurations.
   • -d runs the container in detached mode.
   • -p 10240:8080 maps the container's Jenkins web interface port.
   • -p 10241:50000 maps the agent communication port.
   • -v /var/jenkins_data:/var/jenkins_home mounts the host directory for Jenkins data persistence.
   • -v /etc/localtime:/etc/localtime synchronizes the container's timezone with the host.
   • --name jenkins_instance assigns a name to the container.

docker run -d -p 10240:8080 -p 10241:50000 -v /var/jenkins_data:/var/jenkins_home -v /etc/localtime:/etc/localtime --name jenkins_instance jenkins/jenkins

4. Verify that the container is running.

docker ps -l

5. Check the container logs for any startup issues.

docker logs jenkins_instance

6. Configure an update center mirror for faster plugin downloads. Navigate to the mounted directory and modify the update center configuration file.

cd /var/jenkins_data
sed -i 's|https://updates.jenkins.io/update-center.json|https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json|' hudson.model.UpdateCenter.xml

7. Access the Jenkins web interface by navigating to http://<server_ip>:10240 in a browser.

8. Retrieve the initial administrator password from the persistent storage.

cat /var/jenkins_data/secrets/initialAdminPassword

Enter the dislpayed password in the Jenkins setup wizard to proceed with configuraton.