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1b1ed1a
(Get the code!)
hey, Thanks Andy for your suggestion and Gabriel for your quick fixing!
Now I've a working setup and this on RHEL!!
I found that nova-network wasn't running in my setup and because of that the error "Timeout while waiting on RPC response" was coming up and also Horizon had issues. I debugged and found the reason why nova-network wasn't running was due to following command failure in nova startup.
"sudo iptables-save -t filter"
This was because in my RHEL machine the setting was such that sudo was to work only with tty. After I disabled this in sudoers file, basically by commenting out following line, all works well when I restarted nova.
#commented out following line in sudoers file (on RHEL)
"Default requiretty"