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Type: Bug
Resolution: Unresolved
Priority: Major
Fix Version/s: None
Affects Version/s: 4.15, 4.16, 4.17, 4.18, 4.19, 4.20
Component/s: HyperShift
Labels:
- triaged

Activity Type:
Quality / Stability / Reliability
Blocked:
False
Blocked Reason:

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Severity:
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Regression:
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Target Backport Versions:
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Target Version:
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Release Blocker:
Proposed
Sprint:
None

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SFDC Cases Open:
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PX Impact Score:

Release Note Status:
None
Release Note Type:
None
Release Note Text:
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Escape Reason:
None
Escape Impact:
None
Corrective Measures:
None
SDLC stage when should've been found:
None

Description of problem:

    The autoscaler is not considering nodepools in different zones as similar because it is not ignoring the topology.k8s.aws/zone-id label. This label is applied only to nodes created for HostedClusters, not self managed clusters.

Version-Release number of selected component (if applicable):

    4.20

How reproducible:

    Always

Steps to Reproduce:

    1. Create an AWS hosted cluster with nodepools in different zones and autoscaling enabled.
    2. Add workloads to cause autoscaling.

Actual results:

    Nodes are not scaled evenly across zones

Expected results:

    Nodes are scaled evenly across zones

Additional info:

The topology.k8s.aws/zone-id label is not being ignored by the autoscaler when considering similar nodegroups.

account is impacted by

OCPSTRAT-2239 Hosted Clusters expose CAO's BalancingIgnoredLabels

Release Pending

Assignee:: Liangquan Li

Reporter:: Cesar Wong

Need Info From:: None

Contributors:: None

QA Contact:: Lin Gao

Doc Contact:: None

Votes:: 0 Vote for this issue

Watchers:: 6 Start watching this issue

Created:: 2025/07/14 8:14 AM

Updated:: 2025/07/23 11:07 AM

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