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Add filtering before DeleteOrEvictPods #1106

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Merged
tiationg-kho merged 3 commits into from
Dec 31, 2024
Merged

Add filtering before DeleteOrEvictPods #1106

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61ec184
Add filtering before DeleteOrEvictPods
tiationg-kho Dec 15, 2024
dc2c91a
Merge branch 'aws:main' into 1097-daemon
tiationg-kho Dec 24, 2024
ac96fe3
Add unit test
tiationg-kho Dec 24, 2024
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28 changes: 28 additions & 0 deletions pkg/node/node.go
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,7 @@ const (
RebalanceRecommendationTaint = "aws-node-termination-handler/rebalance-recommendation"

maxTaintValueLength = 63
daemonSet = "DaemonSet"
)

const (
Expand Down Expand Up @@ -144,6 +145,7 @@ func (n Node) CordonAndDrain(nodeName string, reason string, recorder recorderIn
}
if n.nthConfig.UseAPIServerCacheToListPods {
if pods != nil {
pods = n.filterOutDaemonSetPods(pods)
err = n.drainHelper.DeleteOrEvictPods(pods.Items)
}
} else {
Expand Down Expand Up @@ -647,6 +649,23 @@ func (n Node) fetchAllPods(nodeName string) (*corev1.PodList, error) {
return n.drainHelper.Client.CoreV1().Pods("").List(context.TODO(), listOptions)
}

// filterOutDaemonSetPods filters a list of pods to exclude DaemonSet pods when IgnoreDaemonSets is enabled
func (n *Node) filterOutDaemonSetPods(pods *corev1.PodList) *corev1.PodList {
if !n.nthConfig.IgnoreDaemonSets {
return pods
}

var nonDaemonSetPods []corev1.Pod
for _, pod := range pods.Items {
if !isDaemonSetPod(pod) {
nonDaemonSetPods = append(nonDaemonSetPods, pod)
}
}

pods.Items = nonDaemonSetPods
return pods
}

func getDrainHelper(nthConfig config.Config, clientset *kubernetes.Clientset) (*drain.Helper, error) {
drainHelper := &drain.Helper{
Ctx: context.TODO(),
Expand Down Expand Up @@ -838,6 +857,15 @@ func filterPodForDeletion(podName, podNamespace string) func(pod corev1.Pod) dra
}
}

func isDaemonSetPod(pod corev1.Pod) bool {
for _, owner := range pod.OwnerReferences {
if owner.Kind == daemonSet {
return true
}
}
return false
}

type recorderInterface interface {
AnnotatedEventf(object runtime.Object, annotations map[string]string, eventType, reason, messageFmt string, args ...interface{})
}
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