Unable to remove DNS records where name is in the format <name>.<domain>

[Ryan]

I have a domain: "pdl-openstack" and instantiated an A record named "cinder.pdl-openstack" (as opposed to being named "cinder").

Attempting to delete this record fails with the following error: https://pastebin.com/JRFmBULG

This also prevents deletion of the domain as it has existing records.

[Newell Jensen (newell-jensen)]

Ryan,

I have not been able to reproduce this. I am able to add a domain named "pdl-openstack" and then after that I am able to add a resource record of type A with a name of "cinder.pdl-openstack" and I am able to delete it and then the domain subsequently without any issues. I am trying this in MAAS 2.6. What version of MAAS are you seeing this in?

[Newell Jensen (newell-jensen)]

I am also able to the above steps via the API and I don't have any issues. Marking invalid until more steps are given.

# maas admin domains create name=pdl-openstack
Success.
Machine-readable output follows:
{
    "authoritative": true,
    "ttl": null,
    "resource_record_count": 0,
    "name": "pdl-openstack",
    "is_default": false,
    "id": 14,
    "resource_uri": "/MAAS/api/2.0/domains/14/"
}

# maas admin dnsresource-records create domain=pdl-openstack name=cinder.pdl-openstack rrtype=TXT rrdata=10.0.0.14
Success.
Machine-readable output follows:
{
    "ttl": null,
    "rrtype": "TXT",
    "rrdata": "10.0.0.14",
    "id": 1,
    "fqdn": "cinder.pdl-openstack.pdl-openstack",
    "resource_uri": "/MAAS/api/2.0/dnsresourcerecords/1/"
}

# maas admin dnsresources read
Success.
Machine-readable output follows:
[
    {
        "address_ttl": null,
        "id": 30,
        "resource_records": [
            {
                "ttl": null,
                "rrtype": "TXT",
                "rrdata": "10.0.0.14",
                "id": 1,
                "fqdn": "cinder.pdl-openstack.pdl-openstack",
                "resource_uri": "/MAAS/api/2.0/dnsresourcerecords/1/"
            }
        ],
        "ip_addresses": [],
        "fqdn": "cinder.pdl-openstack.pdl-openstack",
        "resource_uri": "/MAAS/api/2.0/dnsresources/30/"
    }
]

# maas admin dnsresource delete 30
Success.
Machine-readable output follows:

# maas admin domain delete 14
Success.
Machine-readable output follows:

[László Bortel (bortel-laszlo)]

This bug also hit us in MAAS version: 2.4.2 (7034-g2f5deb8b8-0ubuntu1).
After upgrading to MAAS version: 2.6.2 (7841-ga10625be3-0ubuntu1~18.04.1) I can still reproduce it in a slightly different scenario. In this scenario the update of dnsresource fails:

$ maas admin domain read 12
Success.
Machine-readable output follows:
{
    "authoritative": true,
    "ttl": null,
    "is_default": false,
    "id": 12,
    "resource_record_count": 0,
    "name": "c",
    "resource_uri": "/MAAS/api/2.0/domains/12/"
}

$ maas admin dnsresources create name="a.b" domain="c" ip_addresses="1.2.3.4"
Success.
Machine-readable output follows:
{
    "address_ttl": null,
    "resource_records": [],
    "ip_addresses": [
        {
            "created": "2020-03-13T17:16:17.007",
            "ip": "1.2.3.4",
            "alloc_type": 4,
            "subnet": null,
            "interface_set": [],
            "alloc_type_name": "User reserved",
            "owner": {
                "is_superuser": true,
                "username": "admin",
                "email": "****@telekom.hu",
                "is_local": true,
                "resource_uri": "/MAAS/api/2.0/users/admin/"
            },
            "resource_uri": "/MAAS/api/2.0/ipaddresses/"
        }
    ],
    "fqdn": "a.b.c",
    "id": 68,
    "resource_uri": "/MAAS/api/2.0/dnsresources/68/"
}

$ maas admin domain read 12
Success.
Machine-readable output follows:
{
    "authoritative": true,
    "ttl": null,
    "is_default": false,
    "id": 12,
    "resource_record_count": 1,
    "name": "c",
    "resource_uri": "/MAAS/api/2.0/domains/12/"
}

$ maas admin dnsresource update 68
{"__all__": ["Invalid dnsresource name: a.b."]}

Update of dnsresource fails, although I change nothing!
Observed this in MAAS version: 2.6.2 (7841-ga10625be3-0ubuntu1~18.04.1)

In fact, deleting the dnsresource succeeds:

$ maas admin dnsresource delete 68
Success.
Machine-readable output follows:

$ maas admin domain read 12
Success.
Machine-readable output follows:
{
    "authoritative": true,
    "ttl": null,
    "name": "c",
    "is_default": false,
    "id": 12,
    "resource_record_count": 0,
    "resource_uri": "/MAAS/api/2.0/domains/12/"
}

Should I open a new bug for the faiing dnsresource update or can you cover it here?

[Launchpad Janitor (janitor)]

[Expired for MAAS because there has been no activity for 60 days.]