Update Jenkins Inside a Docker Container

README.md

First identify your image.

$ docker ps --format "{{.ID}}: {{.Image}} {{.Names}}"
3d2fb2ab2ca5: jenkins-docker jenkins-docker_1

Then login into the image as root.

$ docker container exec -u 0 -it jenkins-docker_1 /bin/bash

Now you are inside the container, download the jenkins.war file from the official site like.

# wget wget http://updates.jenkins-ci.org/download/war/2.176.1/jenkins.war

Replace the version with the one that fits to you.

The next step is to move that file and replace the oldest one.

# mv ./jenkins.war /usr/share/jenkins/

Then change permissions.

# chown jenkins:jenkins /usr/share/jenkins/jenkins.war

The last step is to logout from the container and restart it.

$ docker restart jenkins-docker_1

You can verify that update was successful by access to you Jenkins url.

For everyone who has issues with WGET inside the docker container. Update and Upgrade the Container like a normal Linux OS. In this case use apt update && apt upgrade and then install with apt install wget. This should fix problem.

Thank you! Worked great!

thank you.

thanks

If you've used docker-compose to create your Jenkins container, you can also use the following commands to update the container:

docker-compose stop
docker-compose rm -f
docker-compose pull
docker-compose up -d

If you've used docker-compose to create your Jenkins container, you can also use the following commands to update the container:

docker-compose stop
docker-compose rm -f
docker-compose pull
docker-compose up -d

this helped me, thanks!

I am surprised by this. I thought modification inside a container were not persistent.
Am I missing something?