Bug 2153815 - [17.0 known issue] Document that the quota:cpu_* flavor extra specs do not work with cgroups v2 in RHEL 9
Summary: [17.0 known issue] Document that the quota:cpu_* flavor extra specs do not wo...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: documentation
Version: 17.0 (Wallaby)
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
: ---
Assignee: Irina
QA Contact: RHOS Documentation Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-12-15 14:34 UTC by Artom Lifshitz
Modified: 2023-09-05 01:51 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Known Issue
Doc Text:
There is currently a known issue with creating instances when the instance flavor includes resource usage extra specs, `quota:cpu_*`. On RHOSP 17.0, attempts to create an instance with a flavor that limits the CPU quotas encounter the following error: "Requested CPU control policy not supported by host". This error is raised on RHOSP 17.0 on RHEL 9 because the Compute service assumes that the host is running `cgroups` instead of `cgroups-v2`, therefore it incorrectly detects that the host does not support resource usage extra specs.
Clone Of:
Environment:
Last Closed: 2022-12-21 11:46:34 UTC
Target Upstream Version:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker OSP-20904 0 None None None 2022-12-15 14:44:10 UTC

Description Artom Lifshitz 2022-12-15 14:34:23 UTC 
Known issue for https://bugzilla.redhat.com/show_bug.cgi?id=2118968, which will be fixed in 17.1.
Comment 1 Artom Lifshitz 2022-12-15 14:38:33 UTC 
We'd also like to add the following to our product docs:


Document that the values for quota:cpu_* are host and virt driver dependant, and if you're upgrading to 17.1 you need to:

a. Make sure the values in your extra specs are supported by cgroups v2 on RHEL 9.

b. Create new flavors and resize your instances if they're not.
Comment 3 Artom Lifshitz 2022-12-19 15:20:48 UTC 
Doc text seems a bit vague, but if that's the level of "generality" that we use in our release notes, I won't contradict it. Left a comment on the product docs MR.
Comment 7 Irina 2022-12-21 11:46:34 UTC 
Known issue release note, and updated content, available on the Customer Portal:

Release note: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/17.0/html/release_notes/chap-release-info_rhosp-relnotes#known_issues

Flavor metadata note: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/17.0/html/configuring_the_compute_service_for_instance_creation/assembly_creating-flavors-for-launching-instances_instance-flavors#ref_flavor-metadata_instance-flavors
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