dns failover

a project written in go by db123 to check the iran server availability and if there was any problem change the bind9 dns config contents.

help

./dns-failover -h
Usage of ./dns-failover:
  -active-conf string
    	Active zone config path (default "/etc/bind/db.active")
  -domain string
    	Domain for HTTPS SNI/Host
  -fail-interval duration
    	Interval during failure detection (default 10s)
  -failover-conf string
    	Failover zone config (default "/etc/bind/db.failover")
  -https
    	Use HTTPS
  -interval duration
    	Normal check interval (default 2m0s)
  -ip string
    	Static IP to check
  -port string
    	Port to check (default "80")
  -primary-conf string
    	Primary zone config (default "/etc/bind/db.primary")
  -retries int
    	Consecutive retries before state change (default 5)
  -timeout duration
    	HTTP timeout (default 5s)
  -url string
    	Health endpoint path (default "/nginx-health")
  -v	Verbose logging