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 <ewelin...@gmail.com> 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 jenkinsci-users+unsubscr...@googlegroups.com. > 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 jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/CAOxCx6mk6XikyykLJM0dYGto4ppHN6BOJZsoAWfhCiscD9wxPQ%40mail.gmail.com.
