Red Hat Posted November 10, 2023 Share Posted November 10, 2023 In a Kubernetes cluster, the control plane's stability, resiliency, and performance drive the overall cluster stability, resiliency, and scalability. Generally speaking, the various components of Kubernetes are stateless. For storing object or artifact definitions of a cluster, the etcd key-value store acts as the single source of truth and as the only stateful component. This distributed key-value store is both reliable and strongly consistent. The APIServer, part of the control plane components, is the sole Kubernetes component directly interacting with etcd. All other components use the APIServer to retrieve or set information on the etcd. For this reason, losing etcd would lead to a catastrophic failure of the cluster. View the full article Quote Link to comment Share on other sites More sharing options...
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