Number one cause of HA errors in VMware is incorrectly configured FQDNs. If you find that HA is throwing up an error because you forgot a 03 and used 3 for example (hypothetically), then you need to correct this to get it all working.
The hostname command should do the trick, but you’ve got a couple of other places to look in as well. This should all be so familiar to anyone used to Red Hat anyway.
Make sure it all matches up in:
/etc/sysconfig/network
/etc/hosts
You may also need to reboot, sometimes a service network restart is not enough.
HA should now work a treat!
