How to Install Jenkins on CentOS 7 Using Docker

Install Jenkins via Docker on CentOS 7

Search the Jenkins image:

docker search jenkins

Pull the image and verify it was downloaded:

docker pull jenkins/jenkins
docker images

Create a host directory for Jenkins data and grant full permissions:

mkdir /jenkinshome
chmod 777 -R /jenkinshome/

Run the Jenkins container in detached mode, mapping host port 8088 to container port 8080 and mounting the data volume:

docker run -d --name jenkins -p 8088:8080 -v /jenkinshome:/var/jenkins_home jenkins/jenkins:latest

-d

: run in background --name: container name -p: host:container port mapping -v: host directory to container directory volume mount

Access Jenkins from a browser at http://HOST_IP:8088. Ensure the host firewall allows port 8088. The UI prompts for the initial admin password.

Retrieve the password by entering the container and reading the secret file:

docker exec -it jenkins /bin/bash
cat /var/jenkins_home/secrets/initialAdminPassword

Copy the displayed password and paste it into the Jenkins setup page.

After unlocking, install the recommended plugins, then create an administrator user and password.

Complete the configuration; Jenkins is ready for creating jobs and pipelines.