extend jenkins image to install maven
you need to update package cache before install, and don't miss -y for apt-get install.
FROM jenkins/jenkins:ltsRUN apt-get update && apt-get install -y maven
According to the documentation, this would be in your dockerfile
FROM jenkins/jenkins:lts# if we want to install via aptUSER rootRUN apt-get update && apt-get install -y maven# drop back to the regular jenkins user - good practiceUSER jenkinsAssuming your docker file is in your current directory this is how you would build the image and install in your local docker repo
docker build -t jenkins-maven .For more information
https://github.com/jenkinsci/docker
After installing maven this way, the mvn version will probably be older than what you need. When I ran this, it was Apache Maven 3.3.9
Here is the simplest way to install maven into docker:
Connect to docker with root privilages
sudo docker exec -u root -t -i [container-id] bash
update and install maven
apt-get update & apt-get install
That's it.