Jenkins migration to the new cloud

[Pierre-Yves Chibon]

On Thu, Jun 25, 2015 at 09:45:10PM +0200, Mikolaj Izdebski wrote:
> As briefly discussed today during the meeting, I would like to evaluate
> the possibility to use our packaged Jenkins in Fedora infrastructure,
> instead of upstream binaries. (Jenkins is available[1] in Fedora 21 and
> later.)
> 
> To get started with development of new Jenkins machines I would need
> someone to create 2 new cloud machines: master with Fedora 22 and with
> any OS (RHEL 6 would be my choice), each machine with at least 1 CPU, 2
> GB RAM, public IP and root access for me (FAS: mizdebsk).
> 
> From that I will try to come with my proof-of-concept of "the new
> Jenkins". If people like it then old data can be migrated and it can
> become the new production instance. If not we can just scratch these
> machines and keep using upstream binaries.
> 
> So if you don't mind I'd start working on this.
> Should I open a ticket for creating the new cloud instances?
> 
> Some more technical notes:
> 
> 1) It is possible to use third-party plugins with packaged Jenkins,
> which means that missing plugins can be installed as binary blobs until
> they are packaged in Fedora.
> 
> 2) Jenkins RPMs must be installed only on master node. All slave nodes
> can connect to master and download Jenkins code from there. Slaves still
> need to have basic environment installed (such as Java, git, mock), but
> not Jenkins itself. This means that only the master node must be Fedora
> 21+, slaves can be anything (RHEL 6/7, older Fedoras).
> 
> 3) Michal Srb is currently looking into packaging Jenkins as software
> collection for RHEL 6 and 7. Once (and if) done this could allow having
> RHEL 7 master, with the disadvantage of using "unofficial" RPMs from
> softwarecollections.org. This is just the beginning and we can evaluate
> having non-Fedora master later, if needed.
> 
> [1] https://fedoraproject.org/wiki/Changes/Jenkins

This sounds all quite nice, thanks for picking it up!

Just a side question, if we were to use an EL for the master node, is there
an advantage of using SCLs over using upstream's repo as we do now?

Otherwise, +1 on the Fedora master and let me know if I can help.
We would probably have to re-adjust the jenkins playbook, likely in something
like: roles/jenkins/{master,slaves} instead of the big blob we currently have.


Pierre