etcd is a fast, reliable and fault-tolerant key-value database. It is at the heart of Kubernetes and is an integral part of its control-plane. It is quite important to have the experience to back up and restore the operability of both individual nodes and the whole entire etcd cluster.
In the previous article, we looked in detail at regenerating SSL-certificates and static-manifests for Kubernetes, as well as issues related to restoring the operability of its control-plane. This article will be fully devoted to restoring an etcd-cluster.