Limit the rate at which the API server accepts requests. Rationale: Using EventRateLimit admission control enforces a limit on the number of events that the API Server will accept in a given time slice. A misbehaving workload could overwhelm and DoS the API Server, making it unavailable. This particularly applies to a multi-tenant cluster, where there might be a small percentage of misbehaving tenants which could have a significant impact on the performance of the cluster overall. Hence, it is recommended to limit the rate of events that the API server will accept. Note: This is an Alpha feature in the Kubernetes 1.15 release. Impact: You need to carefully tune in limits as per your environment.
Follow the Kubernetes documentation and set the desired limits in a configuration file. Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml and set the below parameters. --enable-admission-plugins=...,EventRateLimit,... --admission-control-config-file=<path/to/configuration/file> Default Value: By default, EventRateLimit is not set.