community.general.dig – query DNS using the dnspython library

• Synopsis
• Requirements
• Parameters
• Notes
• Examples
• Return Values

Synopsis

• The dig lookup runs queries against DNS servers to retrieve DNS records for a specific name (FQDN - fully qualified domain name). It is possible to lookup any DNS record in this manner.
• There is a couple of different syntaxes that can be used to specify what record should be retrieved, and for which name. It is also possible to explicitly specify the DNS server(s) to use for lookups.
• In its simplest form, the dig lookup plugin can be used to retrieve an IPv4 address (DNS A record) associated with FQDN
• In addition to (default) A record, it is also possible to specify a different record type that should be queried. This can be done by either passing-in additional parameter of format qtype=TYPE to the dig lookup, or by appending /TYPE to the FQDN being queried.
• If multiple values are associated with the requested record, the results will be returned as a comma-separated list. In such cases you may want to pass option wantlist=True to the plugin, which will result in the record values being returned as a list over which you can iterate later on.
• By default, the lookup will rely on system-wide configured DNS servers for performing the query. It is also possible to explicitly specify DNS servers to query using the @DNS_SERVER_1,DNS_SERVER_2,…,DNS_SERVER_N notation. This needs to be passed-in as an additional parameter to the lookup

Requirements

The below requirements are needed on the local controller node that executes this lookup.

• dnspython (python library, http://www.dnspython.org/)

Parameters

Notes

Examples

- name: Simple A record (IPV4 address) lookup for example.com
  ansible.builtin.debug:
    msg: "{{ lookup('community.general.dig', 'example.com.')}}"

- name: "The TXT record for example.org."
  ansible.builtin.debug:
    msg: "{{ lookup('community.general.dig', 'example.org.', 'qtype=TXT') }}"

- name: "The TXT record for example.org, alternative syntax."
  ansible.builtin.debug:
    msg: "{{ lookup('community.general.dig', 'example.org./TXT') }}"

- name: use in a loop
  ansible.builtin.debug:
    msg: "MX record for gmail.com {{ item }}"
  with_items: "{{ lookup('community.general.dig', 'gmail.com./MX', wantlist=True) }}"

- ansible.builtin.debug:
    msg: "Reverse DNS for 192.0.2.5 is {{ lookup('community.general.dig', '192.0.2.5/PTR') }}"
- ansible.builtin.debug:
    msg: "Reverse DNS for 192.0.2.5 is {{ lookup('community.general.dig', '5.2.0.192.in-addr.arpa./PTR') }}"
- ansible.builtin.debug:
    msg: "Reverse DNS for 192.0.2.5 is {{ lookup('community.general.dig', '5.2.0.192.in-addr.arpa.', 'qtype=PTR') }}"
- ansible.builtin.debug:
    msg: "Querying 198.51.100.23 for IPv4 address for example.com. produces {{ lookup('dig', 'example.com', '@198.51.100.23') }}"

- ansible.builtin.debug:
    msg: "XMPP service for gmail.com. is available at {{ item.target }} on port {{ item.port }}"
  with_items: "{{ lookup('community.general.dig', '_xmpp-server._tcp.gmail.com./SRV', 'flat=0', wantlist=True) }}"

- name: Retry nameservers that return SERVFAIL
  ansible.builtin.debug:
    msg: "{{ lookup('community.general.dig', 'example.org./A', 'retry_servfail=True') }}"

Return Values

Common return values are documented here, the following are the fields unique to this lookup:

Authors

• Jan-Piet Mens (@jpmens) <jpmens(at)gmail.com>