go.etcd.io/etcd@v3.3.27+incompatible/hack/scripts-dev/docker-dns/rdns.zone (about) 1 $TTL 86400 2 @ IN SOA etcdns.local. root.etcdns.local. ( 3 100500 ; Serial 4 604800 ; Refresh 5 86400 ; Retry 6 2419200 ; Expire 7 86400 ) ; Negative Cache TTL 8 IN NS ns.etcdns.local. 9 IN A 127.0.0.1 10 11 1 IN PTR m1.etcd.local. 12 1 IN PTR m2.etcd.local. 13 1 IN PTR m3.etcd.local.