Re: [HTCondor-users] Update to RHEL9 workers nodes and Condor 9.XX

[Thomas Birkett - STFC UKRI <thomas.birkett@xxxxxxxxxx>]

Hi Jean-Claude,

 

I hope you are keeping well. Nordugrid-ARC do have an EL9 repo that one could use for EL9 distro’s. It’s specified as Rocky 9 however this will work perfectly fine for Alma as well: http://download.nordugrid.org/repos/6/rocky/9/x86_64/updates/RPMS/

 

As for HTCondor, I would be tempted to upgrade your Condor version on EL7 to the latest (or at least the latest LTS 23.0.x release) as this is the earliest version that supports EL9 (that I can find):

• EL7: https://research.cs.wisc.edu/htcondor/repo/23.0/el7/x86_64/update/
• EL9: https://research.cs.wisc.edu/htcondor/repo/23.0/el9/x86_64/update/

Then once you’ve upgraded your conder version to Condor23.0.x you can then migrate to EL9. This should hopefully reduce the complexities with managing both an OS and application upgrade in the same process. As Condor 9.x is no longer actively supported (https://htcondor.readthedocs.io/en/latest/version-history/introduction-version-history.html)  I’m unsure how much luck you would have finding Condor 9.0 for EL9.

 

Many thanks,

 

Tom

 

From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> on behalf of Jean-Claude CHEVALEYRE <jean-claude.chevaleyre@xxxxxxxxxxxxxxxxx>
Date: Thursday, 23 May 2024 at 12:44
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Subject: [HTCondor-users] Update to RHEL9 workers nodes and Condor 9.XX

Hello,

In order to prepare for the end of CentOS7 support, I am currently considering the replacement of our computing infrastructure.

The actual configuration is currently composed of an ARC CE (nordugrid-arc-condor-6.19.0-1.el7.x86_64), an HTcondor service (condor-9.0.16-1.el7.x86_64). 
These services are installed on CentOS7 servers. In order to make a gradual transition and not mix the change of OS versions and the versions of the applications named above. I would have liked in a first phase to evolve towards an OS in Almalinux.9 without however initially modifying the versions of the ARC CE (6.XX.YY.ZZ9.x86_64) and the HTcondor service (9.0.XX-YY. ZZ9.x86_64).

Can we find somewhere the equivalent versions of ARC CE  ( 6.XX.YY ) and HTCondor ( 6.XX.YY)  for a RHEL9 like version which would facilitate this transition.

All advice and ideas are welcome.


Best Regards
Jean-Claude