Bug 2216011

Summary: [RFE] Migrating to cpu_shared_set and cpu_dedicated_set requires practical solution for large scale deployments
Product: Red Hat OpenStack Reporter: Francois Palin <fpalin>
Component: openstack-novaAssignee: OSP DFG:Compute <osp-dfg-compute>
Status: CLOSED NOTABUG QA Contact: OSP DFG:Compute <osp-dfg-compute>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 16.2 (Train)CC: alifshit, dasmith, eglynn, jhakimra, johender, kchamart, sbauza, sgordon, smooney, vromanso
Target Milestone: ---Flags: alifshit: needinfo? (fpalin)
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Last Closed: 2023-07-13 12:06:09 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Francois Palin 2023-06-19 17:17:59 UTC 
Description of problem:
Customer was made aware of procedure described in [1] to migrate system from using legacy vcpu_pin_set to cpu_shared_set and cpu_dedicated_set.
Customer has more than 5300 instances in production. From customer perspective, scheduling maintenance windows and going through this procedure 
in sync with every single tenant makes the procedure impractical.

A more practical solution would be required for this type of large scale deployment.

Also, please refer to BZ 2187846.


[1] https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.2/html-single/framework_for_upgrades_13_to_16.2/index#updating-the-cpu-pinning-parameter-post-upgrade


How reproducible:


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Actual results:


Expected results:


Additional info:
Customer is currently using RHOSP 16.2, and would like to migrate to cpu_shared_set and cpu_dedicated_set
ahead of eventual upgrade to RHOSP 17.x