Cluster, repmgr, pgbouncer, pgpool, ha proxy, virtual IP, replication, failover and load balance

Hi guys

> I would like to deploy load balance on Postgres master/slave(RW/R) servers and also use a virtual IP on this cluster
>
> I currently have Postgres 9.4 using Repmgr for replication and manual failover to avoid split-brain problems and save a witness server. Also, there is Pgbouncer connection pooling working in session mode
>
> So, what is recommended to use in my current environment?
>
> Is Pgpool the best solution to use with Repmgr+Pgbouncer? In this case, should I replace Pgbouncer for Pgpool or use both? What about HA proxy?
>
> I have never configured a virtual IP to cluster, should I use Keepalived, Heartbeat or any other solution?
>
> Here is the image of what is in my mind: https://ibb.co/fZFebk
> [cluster.jpg]
>
> Thanks in advance for any help!