dnsmasq issue – why an instance can’t obtain DHCP lease

Many of you asked us about resolution of dnsmasq issue.
It was basically due strong default security configuration of RHEL’s iptables.
And Nova by default doesn’t create a permissive rule to allow DHCP traffic.

Resolution is simple:
iptables -I INPUT 1 -p udp --dport 67 -j ACCEPT

P.P.S. Thanks for patience. :-)