Pacemaker Corosync PostgreSQL PaF part2

Описание

PaF v.2 : PostgreSQL Automatic Failover - CentOS 8
https://clusterlabs.github.io/PAF/Quick_Start-CentOS-8.html

In this video , the Vagrant provisioning scripts are :
- downloading a CentOS 8 image box - 19.05.1
- downloading PostgreSQL packages - versions : 9.6 & 12
- in a Linux Ubuntu (20.04) HoST : creating 3 VMs with CentOS 8
- installing PostgreSQL with pgBounncer, HAProxy and pgBackRest addons (in aLL 3 VMs)
- creating users and privileges for Streaming Replication
- configuring PostgreSQL Synchronous Replication
- starting PostgreSQL services in all 3 VMs
- node2 and node3 are cloned from node1
- starting the DB CLusTeR and the synchronous replication ( Primary - Replica )

- installing pacemaker and corosync - in aLL 3 VMs
- creating DB users and privileges for PAF - PostgreSQL Automatic Failover
- creating OS users for High Availability
- in aLL 3 VMs : configuring PAF to work with pacemaker and corosync
- starting aLL nodes with PostgreSQL , PgBouncer and HAProxy
as a OS CLusTeR with VirtuaL iP ( ViP ) resource