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As CentOS 7 has reached its end of life on the 30th June, the Tier-1 computing farm is planning to update farmhas completed the upgrade of the Operating System on all user-interfaces and worker-nodes to AlmaLinux 9 by the end of the year.

To ease the transition to the new OS we prepared a new general-purpose user-interface (ui9-tier1.cr.cnaf.infn.it) where users can test their software and workflows.a singularity image, based on the old CentOS7 worker-nodes has been created to temporary run jobs into.

Keep executing jobs on CentOS7

To keep submitting jobs on CentOS7 To test job submission on AlmaLinux 9 worker nodes users can use the feature described here specifying in the submit file: +SingularityImage="cnaf-el9el7".

$ cat submit-alma9.sub
# Unix submit description file
# sleep.sub -- simple sleep job
+SingularityImage = "cnaf-el9"

Requirements = HasSingularity

batch_name              = Alma9-Sleep
executable              = sleep.sh
arguments               = 60
log                     = $(batch_name).log.$(Cluster).$(Process)
output                  = $(batch_name).out.$(Cluster).$(Process)
error                   = $(batch_name).err.$(Cluster).$(Process)
should_transfer_files   = Yes
when_to_transfer_output = ON_EXIT

queue

This will allow you to run your job inside a singularity image identical to CentOS7 worker-nodes.