Thank you for your comments and suggestions.
I will try to be more detailed.
The DHCP server is basically a PXE server,
Each client that receives an IP address automatically boot to CentOs 8 PXE.
This is random, I have no control over the amount of clients that connect at the same time...
I have dhcp server based on CentOs 8 and i have a ansible server also based on CentOs 8.
When the dhcp server recognize new client he send notify to Ansible server.
Then the ansible server starting playbook for new client.
One of the tasks is to configure currently date and time.