From the official documentation:
Fuel Master Node network requirements
To deploy the Fuel Slave nodes on which you will run your Controller, Compute, Storage or other nodes, the Fuel Master node must have access to the Internet.
https://docs.mirantis.com/openstack/fuel/fuel-8.0/fuel-install-guide.html#sysreqs-network-reqs
From the official documentation:
Fuel Master Node network requirements
To deploy the Fuel Slave nodes on which you will run your Controller, Compute, Storage or other nodes, the Fuel Master node must have access to the Internet.
https:/ /docs.mirantis. com/openstack/ fuel/fuel- 8.0/fuel- install- guide.html# sysreqs- network- reqs