[DO-458] add script for consul backup

backup_scripts/consul/pre_backup.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+BACKUP_FILE=snapshot-$(date +"%Y-%m-%d_%H-%M-%S").snap
+BACKUP_DIR_PATH=/backup
+HOSTNAME=$(hostname)
+
+. /etc/consul.d/backup
+
+LEADER=$(consul operator raft list-peers | grep leader | cut -f 1 -d " ")
+
+[ "$LEADER" = "consul-vault-01" ] \
+&& (echo "I'm leader" && echo "Create backup" && consul snapshot save "${BACKUP_DIR_PATH}/${BACKUP_FILE}" ) \
+|| echo "I'm not leader"