Environment: 

Satellite 6.16 image provisioning via Azure where Azure we are relying on cloud-init in the image to get proper networking from Azure. DNS/DHCP is provided from Azure, not managed by the Satellite.

Issue:

On provisioning attempt the build will rollback with the noted error "unattended: unable to find a host that matches the request from x.x.x.x"

This is resolved by adding a sleep into the user data template before the redhat_registration snippet is called. This sleep gives the Satellite more time to complete orchestration of the host before the build registers itself. With a `sleep 60` added before registration the orchestration completes and the host registers and calls back without issue.