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Status Under review
Created by Guest
Created on Oct 24, 2022

Tolerance and node-selector support for ACE IS CR

In order to optimise license costs, today ACE IS (Integration Server) pods on CP4I on Openshift run on dedicated worker nodes so that the license cost amounts to the worker node capacity.

We have implemented this using node-selectors on the openshift namespace where ACE pods run. But the issue is other non-ACE pods continue to be scheduled on ACE worker nodes reducing the total available CPUs for ACE.

As per REDHAT the only way to prevent this is to have taints on the worker nodes and then set a corresponding toleration for the taint + node-selector label on the application which in this case amounts to the ACE IS CR/ACE operator is what we think.

These are some examples on how these configs can be applied on application objects just to give an idea:

Idea priority Urgent
  • Admin
    Andy Garratt
    Oct 31, 2022

    Hi Abu - thanks for coming back on this - will check in again with James.

  • Guest
    Oct 28, 2022

    Hi Andy,

    The doc you linked is for setting up node-selectors using labels as far as I can tell. This will not solve the problem as we are already doing this today. We should in addition to node-selectors, also be able to set "tolerances" to counter the taints on the ACE's worker node which is not possible today in the ACE Operator framework. Could you please have a dialogue with James too? I had discussed with him before raising this RFE.

  • Admin
    Andy Garratt
    Oct 28, 2022

    Hi Abu,

    Thanks for raising this - can you review the attached docs here and see if this helps with what you're wanting to achieve?

    Please let us know so we can progress the idea appropriately.