karmada-io
Set allocatable replicas for unhealthy cluster to zero when scale up.
What type of PR is this? /kind bug
What this PR does / why we need it:
Which issue(s) this PR fixes:
Fixes #6861
Does this PR introduce a user-facing change?:
karmada-scheduler ignore unhealthy member cluster when scale up workload.
Summary of Changes
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This pull request addresses a bug in the Karmada scheduler by preventing it from scaling up workloads on unhealthy member clusters. It introduces a new helper function to determine cluster readiness and integrates this check into the dynamic scale-up algorithm. Consequently, any cluster not in a ready state will have its allocatable replicas set to zero, ensuring that workloads are only distributed to healthy and available clusters.
Highlights
- New Cluster Health Helper: Introduced a new helper function,
IsClusterReady(), withinpkg/apis/cluster/v1alpha1/cluster_helper.goto provide a standardized way to check if a cluster is in a ready state based on its status conditions. - Enhanced Dynamic Scale-Up Logic: Modified the
dynamicScaleUpfunction inpkg/scheduler/core/division_algorithm.goto incorporate the newIsClusterReady()check. This ensures that during workload scale-up, the scheduler evaluates the health of each member cluster. - Prevent Allocation to Unhealthy Clusters: Implemented logic to set the
AllocatableReplicasto zero for any member cluster identified as not ready during the scale-up process. This prevents the Karmada scheduler from attempting to allocate workloads to unhealthy clusters, improving system stability and reliability.
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Codecov Report
:x: Patch coverage is 60.00000% with 2 lines in your changes missing coverage. Please review.
:white_check_mark: Project coverage is 46.40%. Comparing base (8dbca68) to head (060724a).
:warning: Report is 2 commits behind head on master.
| Files with missing lines | Patch % | Lines |
|---|---|---|
| pkg/apis/cluster/v1alpha1/cluster_helper.go | 0.00% | 2 Missing :warning: |
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Additional details and impacted files
@@ Coverage Diff @@
## master #6863 +/- ##
=======================================
Coverage 46.39% 46.40%
=======================================
Files 698 698
Lines 47763 47768 +5
=======================================
+ Hits 22160 22166 +6
Misses 23934 23934
+ Partials 1669 1668 -1
| Flag | Coverage Δ | |
|---|---|---|
| unittests | 46.40% <60.00%> (+<0.01%) |
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/retest
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