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.

Hi I did it step by step but I get this error:

would you please help me ?

You should use wget only once in the terminal. As you have used it twice, wget is resolving wget instead of the link.

thank you!

@ashkanyo If you can't use wget inside the docker container just use curl
curl -o jenkins.war https://ftp.halifax.rwth-aachen.de/jenkins/war-stable/2.375.3/jenkins.war

I don’t know it’s showing me command not found
What can be the problem am not getting

@mehreenverma20 if you can't find the command in a docker container, don't worry, you can just install it via apt-get install wget .

thank you!

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?