DNS

The !Dns target type is designed to allow you to perform external validation of your DNS records and infrastructure. It does so by making a DNS query to the system's configured DNS resolver and exposing the dns.answers for validation.

Example

An example of this would be checking that your DNS mail records are configured correctly.

probes:
  - name: dns.example
    policy:
      interval: 5000
      timeout: 2000
      retries: 3
    target: !Dns
      domain: example.com.
      record_type: MX
    validators:
      dns.answers: !Contains "10 smtp.example.com"

Inputs

domain required

The domain property is used to specify the DNS domain record which you would like to query.

TIP

You should include a trailing . on your domain name to improve lookup performance by avoiding lookups against alternate DNS parent domains.

record_type default: A

The record_type property is used to specify the DNS record type which you would like to query. The default record type, if none is provided, is A - corresponding to the IPv4 address associated with the domain.

Outputs

dns.answers

The dns.answers property will contain the list of answers returned by the DNS query. This will be a list of strings, each containing the answer for the record type that was queried.

dns.answers:
  - "10 smtp.example.com"
  - "20 smtp2.example.com"

TIP

The easiest way to validate the contents of the dns.answers property is to use the !Contains validator.