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DefaultEvictor: introduce no-eviction policy

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NoEvictionPolicy dictates whether a no-eviction policy is prefered or mandatory.
Needs to be used with caution as this will give users ability to protect their pods
from eviction. Which might work against enfored policies. E.g. plugins evicting pods
violating security policies.
This commit is contained in:
Jan Chaloupka
2025-07-23 10:27:05 +02:00
parent b84b2623b9
commit 7380aa6e0a
9 changed files with 219 additions and 6 deletions
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5
pkg/framework/plugins/defaultevictor/defaultevictor.go
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@@ -24,6 +24,7 @@ import (
"k8s.io/client-go/tools/cache"
"k8s.io/klog/v2"
evictionutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
frameworktypes "sigs.k8s.io/descheduler/pkg/framework/types"
@@ -140,6 +141,10 @@ func (d *DefaultEvictor) Filter(pod *v1.Pod) bool {
return true
}
if d.args.NoEvictionPolicy == MandatoryNoEvictionPolicy && evictionutils.HaveNoEvictionAnnotation(pod) {
return false
}
if utils.IsMirrorPod(pod) {
checkErrs = append(checkErrs, fmt.Errorf("pod is a mirror pod"))
}