Chapter 5. Checking DNS records using IdM Healthcheck

You can identify issues with DNS records in Identity Management (IdM) using the Healthcheck tool.

5.1. DNS records healthcheck test

The Healthcheck tool includes a test for checking that the expected DNS records required for autodiscovery are resolvable.

To list all tests, run the ipa-healthcheck with the --list-sources option: 

# ipa-healthcheck --list-sources

You can find the DNS records check test under the ipahealthcheck.ipa.idns source.

IPADNSSystemRecordsCheck
This test checks the DNS records from the ipa dns-update-system-records --dry-run command using the first resolver specified in the /etc/resolv.conf file. The records are tested on the IPA server.

5.2. Screening DNS records using the healthcheck tool

Follow this procedure to run a standalone manual test of DNS records on an Identity Management (IdM) server using the Healthcheck tool.

The Healthcheck tool includes many tests. Results can be narrowed down by including only the DNS records tests by adding the --source ipahealthcheck.ipa.idns option.

Prerequisites

  • You must perform Healthcheck tests as the root user.

Procedure

  • To run the DNS records check, enter: 

    # ipa-healthcheck --source ipahealthcheck.ipa.idns

    If the record is resolvable, the test returns SUCCESS as a result: 

    {
    "source": "ipahealthcheck.ipa.idns",
    "check": "IPADNSSystemRecordsCheck",
    "result": "SUCCESS",
    "uuid": "eb7a3b68-f6b2-4631-af01-798cac0eb018",
    "when": "20200415143339Z",
    "duration": "0.210471",
    "kw": {
      "key": "_ldap._tcp.idm.example.com.:server1.idm.example.com."
    }
}

    The test returns a WARNING when, for example, the number of records does not match the expected number: 

    {
    "source": "ipahealthcheck.ipa.idns",
    "check": "IPADNSSystemRecordsCheck",
    "result": "WARNING",
    "uuid": "972b7782-1616-48e0-bd5c-49a80c257895",
    "when": "20200409100614Z",
    "duration": "0.203049",
    "kw": {
      "msg": "Got {count} ipa-ca A records, expected {expected}",
      "count": 2,
      "expected": 1
    }
}

Additional resources

  • See man ipa-healthcheck.