FEATURE STATE: Kubernetes v1.15 [stable] Client certificates generated by kubeadm expire after 1 year. This page explains how to manage certificate renewals with kubeadm. It also covers other tasks related to kubeadm certificate management. Before you begin You should be familiar with PKI certificates and requirements in Kubernetes. Using custom certificates By default, kubeadm generates all the certificates needed for a cluster to run. You can override this behavior by providing your own certificates.