How to resolve "Unable to resolve host" in OpenStack Yoga?

I’m trying to install Openstack on CentOS Stream 9 by following the official openstack installation guide for Yoga available at: https://docs.openstack.org/install-guide/ 1. When I try to bootstrap keystone I get the following error:

/etc/keystone/fernet-keys/

does not exist. 2. When I tried to create a domain using

domain create --description "An Example Domain" example

it failed. Upon pinging controller I found out that the machine could not resolve the controller. Next, I added an entry to

/etc/hosts

that explicitly resolved the controller to my machine’s IP 3. Pinging the controller succeeded but I was still not able to create a domain 4. I tried creating a project using

project create --domain default --description "Service Project" service

This command failed with internal server error.