Installing Docker on Jenkins

Jenkins is a great tool to build and package artifacts, it can be either deployed independently as a service in docker, lets go through the steps required to install Jenkins on docker as a container.

Get official Jenkins Image

• Go to your terminal/command prompt and get the Jenkins latest’s image from docker hub
  
  docker pull Jenkins

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  docker pull Jenkins

Run Docker Image

Map localhost ports

• Then we will try to run the image, we will map Jenkins on localhost port 8080 and port 50000

Map Volumes to persist data

• If it is important to persist the Jenkins data you can choose between the 2 options.
  1. Save data within the docker container, the docker volume persists upon restarts and even after if the container is deleted.
  2. Save data on your host/disk/laptop/machine. Weigh in your requirements and see what fits in with your requirements.
• Option-1> To persist the data within docker container
  
  docker volume create --name jenkins_data docker run --name jenkins -d -v jenkins_data:/var/jenkins_home -p 8080:8080 -p 50000:50000 jenkins:latest

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  docker volume create --name jenkins_data docker run --name jenkins -d -v jenkins_data:/var/jenkins_home -p 8080:8080 -p 50000:50000 jenkins:latest

OR

• Option-2>To persist the data within host( host machine/laptop) container(option-2)
  
  docker run --name jenkins -d -v /Users/jenkins:/var/jenkins_home -p 8080:8080 -p 50000:50000 jenkins:latest

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  docker run --name jenkins -d -v /Users/jenkins:/var/jenkins_home -p 8080:8080 -p 50000:50000 jenkins:latest

  Don’t forget to change the path to your local drive  after -v tag /Users/…. in case of Mac and C:/Users…. in case of Windows)

Check Jenkins is running

• Check if docker container Jenkins is running
  
  docker ps -a

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  docker ps -a

  
  If all is fine, it should show output like below
  
  CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 041465f0254e jenkins:latest "/bin/tini -- /usr..." 43 hours ago Up 58 seconds 0.0.0.0:50000>50000/tcp, 0.0.0.0:8082->8080/tcp jenkins

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  CONTAINER    ID    IMAGE    COMMAND    CREATED   STATUS   PORTS    NAMES 041465f0254e jenkins:latest "/bin/tini -- /usr..." 43 hours ago Up 58 seconds 0.0.0.0:50000>50000/tcp, 0.0.0.0:8082->8080/tcp jenkins

Configure Jenkins

• Go to Jenkins -> Globals tools configurations and add Java/GIT/Maven installations; download from the internet is an option which you can choose if there are no available installations on your disk as shown below.