[FIXED] Install Jenkins manually on docker image

Issue

I'm trying to install/run jenkins manually without pulling the Jenkins image from the docker-hub

for this exercise I have used the ubuntu image container and I did the following:

• Install jdk-11 on the container
• Set up the JAVA_HOME env variable
• Install jenkins with apt-get
• Run jenkins with the command service jenkins start

then status output is the following

root@42024442b87b:/# service jenkins status
Correct java version found
Jenkins Automation Server is running with the pid 89

Now I don't now how to access the jenkins server running in the container from my host.

thanks in advance

Solution

Docker containers are not reachable using the network from the host system by default. You need to expose a container's host, meaning that the port will be opened on the host machine and all traffic forwarded to the container.

Running docker with -p 8080:8080 forwards 8080. Take a look at the syntax here.

You can also specify which port on the host machine is supposed to be mapped to a container's port with something like -p 1234:8080.

You can also use the EXPOSE keyword in your Dockerfile.

Answered By - f1sh