API-initiated eviction is the process by which you use the Eviction API to create an Eviction object that triggers graceful pod termination.
You can request eviction by directly calling the Eviction API using a client of the kube-apiserver, like the kubectl drain command. This creates an Eviction object, which causes the API server to terminate the Pod.
API-initiated evictions respect your configured PodDisruptionBudgets and terminationGracePeriodSeconds.
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https://kubernetes.io/docs/concepts/scheduling-eviction/api-eviction/