[Docker] 1. Setup Jenkins with Docker on Mac

(1.) Download Docker for Mac

Download link:

Docker Desktop: The #1 Containerization Tool for Developers | DockerDocker

(2.) Download Jenkins CI with blue ocean plugin.

Download link:

https://hub.docker.com/r/jenkinsci/blueocean/

Follow the installation instructions to install the jenkinsci/blueocean Docker container.

(3.) Start the Jenkins CI container

$ docker run --name jenkins -u root -d -p 8080:8080 -p 50000:50000 -v jenkins-data:/var/jenkins_home -v /var/run/docker.sock:/var/run/docker.sock jenkinsci/blueocean

Command options:

--name 
container name

-d 
is to let jenkinsci container run in background and silent the output rather
than print out in terminal console. 

-p 8080:8080 
is the to map the port number for host machine and docker container respectively.
(Service port : Jenkins port)

-p 50000:50000 
is for the JNLP based Jenkins master-slave configurations.
JNLP-based Jenkins agents communicate with the Jenkins master through TCP port 50000 by default.

-v jenkins-data:/var/jenkins_home 
is to map the /var/jenkins_home directory in the container to the Docker 
volume with the name jenkins-data, this option is to ask Jenkins to persist 
state for instance restarts. -v /var/run/docker.sock:/var/run/docker.sock, 
this option is to allow jenkins ci container to communicate with docker 
daemon.  jenkinsci/blueocean is the jenkinsci image with blueocean plugin, 
specifying this option will automatically pull any updates.  

After start Jenkins, you can use the below command to check the container status:

docker ps -a

Docker commands:

//start a container:
docker start <container name>

//stop a container:
docker stop <container name>

//remove a container:
docker rm <container name>

//restart a container:
docker restart  <container name>

(4.) Browse http://localhost:8080/ , you will see below page.

( 5.) Find the password by below command

docker exec <container> cat /var/jenkins_home/secrets/initialAdminPassword