[ovirt-users] upgrading hardware node

[Bill James]

I already upgraded ovirt management engine from 3.6.3 to 3.6.4.
Now I want to upgrade the hardware nodes.
I see there is a "Upgrade" button on the Hosts tab but I have not found 
any way to make it enabled.
Even with host in maintenance it still is disabled.

How do I get that to work?
I'm sure I could just run yum update, but aren't you suppose to be able 
to do it in the GUI?


Thanks.