hello, for your question 1, i can share my experience. We are using near same settings as you describe, jenkins in docker and Jenkins_home point to a docker volume. There's no problem once you upgrade the Jenkins version and point the new version jenkins_home to old docker volume. What I do is, before upgrade to be version rename the Jenkins_home, and after upgrade renamed to original.
On Mon, Dec 7, 2020, 4:12 PM Ewelina Wilkosz <[email protected]> wrote: > > Hi! > > I am using Jenkins in Docker and I map a folder from local machine to the > container's /var/jenkins_home to preserve JENKINS_HOME. > > There are two things I am wondering about, and maybe you can comment: > > 1. Can new Jenkins corrupt existing JENKINS_HOME? > Let's assume I have Jenkins in version X running, I want to upgrade so I > have built new image, with Jenkins version Y, same plugins - maybe updated > during the image build > > Is it possible that when I restart Jenkins with new image with version Y, > the existing JENKINS_HOME won't be compatible with new version? > Is it possible that after restart JENKINS_HOME will be changed in a way > that it won't be possible to use it again with version X - if I want to > rollback for whatever reason? > > 2. What happens when two instances share JENKINS_HOME? > I want to have a simple test environment - let's not discuss now if it's a > good or bad approach :) - so next to a working Jenkins container I start > another one in a quiet mode (no job will start), with a new image I want to > try out > The first idea is to copy original JENKINS_HOME and use this copy, but > what if the home is very big and I do not have much space - how bad would > running second Jenkins with JENKINS_HOME mapped to the same folder on a > local host would be? (I haven't considered that option, but I was asked > 'why') > > I know I can just run it and check, but I think there might be plenty of > different cases that I will not see in my simple test, but maybe some of > you have more experience or ran into issues before > > BR > Ewelina > > -- > You received this message because you are subscribed to the Google Groups > "Jenkins Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jenkinsci-users/97993ad1-85da-489b-9d8c-ebb436fb6b79n%40googlegroups.com > <https://groups.google.com/d/msgid/jenkinsci-users/97993ad1-85da-489b-9d8c-ebb436fb6b79n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/CAOxCx6mk6XikyykLJM0dYGto4ppHN6BOJZsoAWfhCiscD9wxPQ%40mail.gmail.com.
