I am new to Openstack and want to try it on KVM setup with 1 controller and 2 compute VMs. In my first attempt, I was able to install Openstack using kolla-ansible(2024.1 version) and also run-initonce completed without any issues. Now, I want to create instances that can access my back-bone i.e. KVM virtual network(192.168.121.x/24) but either floating IP concept or extending my KVM network to openstack(I don't know if it's feasible!)

Some info about my infra: 

a. Controller 1: Interface eth0 has 192.168.121.5 IP address. eth1 has no IP. 

b. compute 1: Interface eth0: 192.168.121.10, eth1 has no IP.

c. compute 2: interface eth0: 192.168.121.15, eth1 has no IP. 

What configuration do I need to enable in globals.yml and what all I need to do post deployment of openstack to ensure I have virtual instances on openstack that have IPs from 192.168.121.x network(dhcp can be controlled by KVM network?) and are accessible from other KVM based VMs that I created outside of openstack. 

I am a learner to please be elaborate if possible. Thanks in advance to the community. 

- Best regards!