My plan is to do a yum upgrade, distro upgrades and a major Asterisk version switch on my High Availability machines.
To avoid much downtime I am thinking of doing it all at once.
So perform distro, yum and asterisk major version upgrade on first node FreePBX-A while Node B is in standby, then bring B online, swap and do upgrades on B.
Or should I rather separate the different upgrades and swap nodes after each?