OKD - Create a Homelab Cluster - DHCP

We'll be working on the Servers that are surrounded by the continous lines in this drawing:

Setting up DHCP for the cluster is probably the easiest and shortest task. All we need to do is add a reservation for each node in the cluster that is running CoreOS, in my case that's just 6 static reservations.

Since I'll be hosting this cluster in my homelab and will provide the infrastructure myself, I'll manually assign the mac-addresses. A static lease will look like this:

 host bootstrap.okd {  
   hardware ethernet 52:54:00:0f:0f:00;  
   fixed-address 172.31.10.150;  
  }  

I'd like to explain it for a minute so there's no confusion on why I'm adding the clustername to the nodename. With my DHCP Setup, I've set 'option domain-name "archyslife.lan"' so I'm using the clustername / subdomain for the cluster here as well in each host definition. For reference, this is my full subnet declaration:

 subnet 172.31.10.0 netmask 255.255.255.0 {   
   range 172.31.10.100 172.31.10.199;  
   option routers 172.31.10.254;      
   option subnet-mask 255.255.255.0;  
   option domain-search "archyslife.lan";  
   option domain-name "archyslife.lan";  
   option domain-name-servers 172.31.10.5, 172.31.10.6, 172.31.10.7;  
   option ntp-servers 172.31.10.5, 172.31.10.6, 172.31.10.7;  
   option broadcast-address 172.31.10.255;  
   next-server 172.31.10.10;  
   if option architecture-type = 00:07 {  
    filename "grub2/grubx64.efi";  
   } else {  
    filename "pxelinux.0";  
   }                    
 }  

Now, let's get to configuring the static leases for each node:

 [archy@infra01 ~]$ sudo vim /etc/dhcp/dhcpd.conf  

 host bootstrap.okd {  
   hardware ethernet 52:54:00:0f:0f:00;  
   fixed-address 172.31.10.150;  
  }  
 host master01.okd {  
   hardware ethernet 52:54:00:0f:0f:01;  
   fixed-address 172.31.10.151;  
  }  
 host master02.okd {  
   hardware ethernet 52:54:00:0f:0f:02;  
   fixed-address 172.31.10.152;  
  }  
 host master03.okd {  
   hardware ethernet 52:54:00:0f:0f:03;  
   fixed-address 172.31.10.153;  
  }  
 host worker01.okd {  
   hardware ethernet 52:54:00:0f:0f:04;  
   fixed-address 172.31.10.154;  
  }  
 host worker02.okd {  
   hardware ethernet 52:54:00:0f:0f:05;  
   fixed-address 172.31.10.155;  
  }  

Now, restart the service to make the changes take effect:

 [archy@infra01 ~]$ sudo systemctl restart dhcpd.service  

That's all for setting up dhcp for the cluster in my environment. Keep in mind that I'll not be covering on how to set up a dhcp server since I'll see that as a prerequirement for this setup.

Feel free to comment and / or suggest a topic.