Docs/CloudNative/Kubernetes/Docs/etcd/backup-etcd.md

ETCDCTL_API=3 etcdctl --end-points=127.0.0.1:2379 --cacert=/etc/kubernetes/ca.crt --cert=/etc/kubernetes/etcd-client.crt --key=/etc/kubernetes/etcd-client.key snapshot save /tmp/etcd-`date "%Y-%m-%d_%H%M%S"`.db