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Check whether pod matches the inter-pod anti-affinity of another Pod in a given Node in NodeFit() (#1356)

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* Check if Pod matches inter-pod anti-affinity of other pod on node as part of NodeFit()

* Add unit tests for checking inter-pod anti-affinity match in NodeFit()
* Export setPodAntiAffinity() helper func to test utils

* Add docs for inter-pod anti-affinity in README

* Refactor logic for inter-pod anti-affinity to use in multiple pkgs
* Move logic for finding match between pods with antiaffinity out of framework to reuse in other pkgs
* Move interpod antiaffinity funcs to pkg/utils/predicates.go

* Add unit tests for inter-pod anti-affinity check
* Test logic in GroupByNodeName
* Test NodeFit() case where pods matches inter-pod anti-affinity
* Test for inter-pod anti-affinity pods  match terms, have label selector

* NodeFit inter-pod anti-affinity check returns early if affinity spec not set
This commit is contained in:
Niki Manoledaki
2024-03-13 03:50:03 +01:00
committed by GitHub
parent dc2cf723bc
commit 749e81c51c
12 changed files with 328 additions and 132 deletions
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27
test/test_utils.go
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@@ -337,3 +337,30 @@ func WaitForDeploymentPodsRunning(ctx context.Context, t *testing.T, clientSet c
t.Fatalf("Error waiting for pods running: %v", err)
}
}
func SetPodAntiAffinity(inputPod *v1.Pod, labelKey, labelValue string) {
inputPod.Spec.Affinity = &v1.Affinity{
PodAntiAffinity: &v1.PodAntiAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
{
LabelSelector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Key: labelKey,
Operator: metav1.LabelSelectorOpIn,
Values: []string{labelValue},
},
},
},
TopologyKey: "region",
},
},
},
}
}
func PodWithPodAntiAffinity(inputPod *v1.Pod, labelKey, labelValue string) *v1.Pod {
SetPodAntiAffinity(inputPod, labelKey, labelValue)
inputPod.Labels = map[string]string{labelKey: labelValue}
return inputPod
}