test_ipa_healthcheck_no_errors and test_ipa_dns_systemrecords_check fail with:

    [
      {
        "source": "ipahealthcheck.ipa.idns",
        "check": "IPADNSSystemRecordsCheck",
        "result": "WARNING",
        "uuid": "b979a88a-6373-4990-bc83-ce724e9730b4",
        "when": "20210120055054Z",
        "duration": "0.032740",
        "kw": {
          "msg": "Got {count} ipa-ca AAAA records, expected {expected}",
          "count": 1,
          "expected": 2
        }
      }
    ]

IPA server's AAAA records at embedded DNS mode depend on the result of get_server_ip_address function (ipaserver.install.installutils), which in turn, relies on NSS.

In the case of Azure Pipelines, there are neither IPv6 records in /etc/hosts nor external DNS, which may provide such. This leads to the missing AAAA records for master and missing AAAA records for ipa-ca pointing to master in embedded DNS.

test_ipa_dns_systemrecords_check doesn't expect to be in IPv6 environment.