instalar repmgr para ub
-bash-4.2$ cat repmgr.conf
node_id=2
node_name=node2
conninfo='host=172.16.140.137 user=repmgr dbname=repmgr connect_timeout=2'
data_directory='/var/lib/pgsql/12/data'
failover=automatic
promote_command='/usr/pgsql-12/bin/repmgr standby promote -f /var/lib/pgsql/repmgr.conf --log-to-file'
follow_command='/usr/pgsql-12/bin/repmgr standby follow -f /var/lib/pgsql/repmgr.conf --log-to-file --upstream-node-id=%n'