DNS Query Monitoring

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DNS (Domain Name System) is a naming system for resources connected to the Internet - essentially the phonebook of the Internet.

Monitoring your DNS records helps you ensure that the Domain Name System continues to route traffic properly to your websites, services, and electronic communications.

Why use the DNS Query Telegraf Plugin?

DNS monitoring is done to track DNS requests and servers for performance issues, and therefore keeping an eye on DNS performance at effective levels is a must for companies. Collecting these metrics with the DNS Query Telegraf Plugin will allow you to quickly store them in InfluxDB along with a number of other metrics that can help you gain a comprehensive view of your application, networks and more.

How to monitor DNS Query using the Telegraf plugin

The DNS plugin gathers DNS query times in milliseconds, similar to dig, a network administration command-line tool for querying the Domain Name System (DNS). Configuring the DNS Query Telegraf Plugin requires defining the network protocol, domain, port, and query timeout. Once you point Telegraf to your InfluxDB instance, you can start collecting DNS Query metrics to help you understand performance. You can set thresholds and send alerts to avoid any issues with DNS routing.

Key DNS Query metrics to use for monitoring

Some of the important DNS Query metrics that you should proactively monitor include:

  • tags:
    • server
    • domain
    • record_type
    • result
    • rcode
  • fields:
    • query_time_ms (float)
    • result_code (int, success = 0, timeout = 1, error = 2)
    • rcode_value (int)

Rcode Descriptions

rcode_value rcode Description
0 NoError No Error
1 FormErr Format Error
2 ServFail Server Failure
3 NXDomain Non-Existent Domain
4 NotImp Not Implemented
5 Refused Query Refused
6 YXDomain Name Exists when it should not
7 YXRRSet RR Set Exists when it should not
8 NXRRSet RR Set that should exist does not
9 NotAuth Server Not Authoritative for zone
10 NotZone Name not contained in zone
16 BADSIG TSIG Signature Failure
16 BADVERS Bad OPT Version
17 BADKEY Key not recognized
18 BADTIME Signature out of time window
20 BADNAME Duplicate key name
21 BADALG Algorithm not supported
22 BADTRUNC Bad Truncation
23 BADCOOKIE Bad/missing Server Cookie
For more information, please check out the documentation.

Project URL   Documentation

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