How to dockerize jenkins in the right way ?

[Narahari 'n' Savitha]

Thank you folks in advance for your time and help.

Need some input please.

I used Dockerfile to pull lts-alpine

I then  installed requisites for ansible and installed ansible.

I ran container and mapped a volume so the jenkins home is shared with host.

It all works.

Now I can put jobs there from jenkins where we backup the config.xml.

Now for some best practice questions help please

I plan to setup Jenkins the way I want to (docker exec update plugins, jobs from git etc.,)

Re start container but mount host to a /tmp/jenkins folder inside container.

cp -Rf /tmp/jenkins /var/jenkins_home

Stop container and docker commit the image.

Start container with new image.  This way the image is completely self contained.

What do you folks think ?  Is this a good idea ?

I plan to update the cmd in the Dockerfile to use git to update jobs from git at startup or I can keep the latest job in the docker image.

I am in confusion.  Kindly advise.

-Narahari

[Baptiste Mathus]

Do not mount data from the host. It's called a bind-mount and is generally strongly discouraged.

Not sure what is your purpose *exactly*.

To store data and be able to upgrade,I have written https://batmat.net/2018/09/07/how-to-run-and-upgrade-jenkins-using-the-official-docker-image/ recently.

For the things like plugins, IIUC your use case: read the image documentation and derive the official image by installing additional plugins.

Cheers

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