$TTL 900
@	IN	SOA	ns1	root (
	        9		 ;<serial-number>
	        900		 ;<time-to-refresh>
	        900		 ;<time-to-retry>
		604800		 ;<time-to-expire>
	        900		 ;<minimum-TTL>
 
	)		 

;List Nameservers
@	IN	NS	ns1.kazan.
@	IN	NS	ns3.kazan.

; Kubernetes cluster
ctrlr-1		IN	A	10.0.0.170
worker-1	IN	A	10.0.0.171
worker-2	IN	A	10.0.0.172

;Address to NS name mapping
ns1.kazan.	IN	A	10.0.0.72
ns3.kazan.	IN	A	10.0.0.72