The tool for DNS diagnostics.
$ dns-checker --help
Usage of dns-checker:
-c, --count int number of requests to send. Default is to run until ^C
-i, --interval duration interval between requests (default 100ms)
-n, --name string resource record name
-s, --nameservers strings comma separated nameservers names with port (default [10.0.0.1:53])
-r, --no-recursion disable recursion desired flag
-e, --only-errors show only errors
-q, --query-type string query type to use (A, AAAA, SOA, CNAME...) (default "A")
-t, --timeout duration query timeout (default 2s)
Query DNS record mixanemca.ru with type A for two DNS nameservers (1.1.1.1 and 8.8.8.8) two times.
$ dns-checker --name mixanemca.ru. --query-type A --nameservers "1.1.1.1:53,8.8.8.8:53" --count 2
2021-07-15 19:43:38.806987 +0300 MSK m=+0.174620341
Nameserver: 8.8.8.8:53
mixanemca.ru. 3599 IN A 134.209.90.80
2021-07-15 19:43:39.415163 +0300 MSK m=+0.782800789
Nameserver: 1.1.1.1:53
mixanemca.ru. 3600 IN A 134.209.90.80
2021-07-15 19:43:39.419918 +0300 MSK m=+0.787556393
Nameserver: 1.1.1.1:53
mixanemca.ru. 3597 IN A 134.209.90.80
2021-07-15 19:43:40.837345 +0300 MSK m=+2.204993198
Nameserver: 8.8.8.8:53
exchange failed: read udp 192.168.44.99:51871->8.8.8.8:53: i/o timeout (rtt: 2.000037788s)
--- mixanemca.ru. dns check statistics ---
1 error (25.00%) and 3 success (75.00%) for 2 nameservers.
round-trip min/avg/max = 4.638/251.414/678.894 ms