configurable TTL

management/dns_update.py

@@ -501,19 +501,19 @@ def write_nsd_zone(domain, zonefile, records, env, force):
 
 	zone = """
 $ORIGIN {domain}.
-$TTL 86400          ; default time to live
+$TTL {ttl}          ; default time to live
 
 @ IN SOA ns1.{primary_domain}. hostmaster.{primary_domain}. (
            __SERIAL__     ; serial number
            7200     ; Refresh (secondary nameserver update interval)
            3600     ; Retry (when refresh fails, how often to try again, should be lower than the refresh)
            1209600  ; Expire (when refresh fails, how long secondary nameserver will keep records around anyway)
-           86400    ; Negative TTL (how long negative responses are cached)
+           {ttl}    ; Negative TTL (how long negative responses are cached)
            )
 """
 
 	# Replace replacement strings.
-	zone = zone.format(domain=domain, primary_domain=env["PRIMARY_HOSTNAME"])
+	zone = zone.format(domain=domain, primary_domain=env["PRIMARY_HOSTNAME"], ttl=env["TTL"])
 
 	# Add records.
 	for subdomain, querytype, value, explanation in records:

setup/start.sh

@@ -104,6 +104,7 @@ PUBLIC_IPV6=$PUBLIC_IPV6
 PRIVATE_IP=$PRIVATE_IP
 PRIVATE_IPV6=$PRIVATE_IPV6
 MTA_STS_MODE=${DEFAULT_MTA_STS_MODE:-enforce}
+TTL=${DEFAULT_TTL:-86400}
 EOF
 
 # Start service configuration.