etcd Backup on OpenShift 4

etcd is the key-value store used by Kubernetes. etcd contains the state of all resources created in the cluster through the Kubernetes API.

The automated backup implements the steps documented in the Backing up etcd guide.

Files

The backup consist of a .tar.gz archive which contains two files:

snapshot_<datetimestamp>.db: This file is the etcd snapshot.
static_kuberesources_<datetimestamp>.tar.gz: This file contains the resources for the static pods. If etcd encryption is enabled, it also contains the encryption keys for the etcd snapshot.