This is kind of an odd question to ask, but I have just installed vrealize operations manager 6.7 in my test lab to learn about it. I have it fully installed and I have added a dns entry for the vapp in my dc and everything is pingable by the fqdn. After the vapp boots up fully it is showing the host name as: https://vrealizeclusternode/.
VrealizeClusterNode is not the name that I assigned to the vapp. My assumption is that since this is the only instance it has to hold that default name, but if not, how can I make the fqdn that I assigned show up? I am including screenshots of what I see also I am adding a screenshot of the area where I think my issue is coming from.
You said fully installed, did you performed the first time configuration of vROps? There you need to specify a cluster master node name.
As mentioned in the previous post, also check and verify DNS configuration.