Add script to snapshot etcd

scripts/etcd-snapshot.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+ETCDCTL_API=3 etcdctl --endpoints https://etcd.local:2379 \
+--cacert=/var/lib/kubernetes/secrets/ca.pem \
+--cert=/var/lib/kubernetes/secrets/kube-apiserver-etcd-client.pem \
+--key=/var/lib/kubernetes/secrets/kube-apiserver-etcd-client-key.pem \
+snapshot save snapshot.db