Comment 6 for bug 1248893

This happened to me today.

$ maas root nodes list | grep hostname
        "hostname": "usable-group.maas",
        "hostname": "eager-insurance.maas",
        "hostname": "funny-shape.maas",
        "hostname": "fast-hospital.maas",

$ maas root nodes list hostname=usable-group.maas
Success.
Machine-readable output follows:
[]

$ maas root nodes list | grep -e hostname -e mac_address
                "mac_address": "52:54:00:99:41:84"
        "hostname": "usable-group.maas",
                "mac_address": "52:54:00:76:ed:b3"
                "mac_address": "52:54:00:cd:c6:00"
        "hostname": "eager-insurance.maas",
                "mac_address": "52:54:00:6f:25:b0"
        "hostname": "funny-shape.maas",
                "mac_address": "52:54:00:ab:a7:da"
        "hostname": "fast-hospital.maas",

$ maas root nodes list mac_address="52:54:00:99:41:84"
Success.
Machine-readable output follows:
[
    {
        "ip_addresses": [],
        "cpu_count": 0,
        "power_type": "",
        "tag_names": [],
        "swap_size": null,
        "owner": null,
        "macaddress_set": [
            {
                "resource_uri": "/MAAS/api/1.0/nodes/node-5b20bbb4-833b-11e5-af6f-525400aabbcc/macs/52%3A54%3A00%3A99%3A41%3A84/",
                "mac_address": "52:54:00:99:41:84"
            }
        ],
        "zone": {
            "resource_uri": "/MAAS/api/1.0/zones/default/",
            "name": "default",
            "description": ""
        },
        "hostname": "usable-group.maas",
        "storage": 0,
        "system_id": "node-5b20bbb4-833b-11e5-af6f-525400aabbcc",
        "boot_type": "fastpath",
        "memory": 0,
        "disable_ipv4": false,
        "status": 0,
        "power_state": "unknown",
        "routers": null,
        "pxe_mac": null,
        "netboot": true,
        "osystem": "",
        "substatus": 0,
        "architecture": "amd64/generic",
        "distro_series": "",
        "resource_uri": "/MAAS/api/1.0/nodes/node-5b20bbb4-833b-11e5-af6f-525400aabbcc/"
    }
]

$ dpkg-query -W maas
maas 1.8.3+bzr4053-0ubuntu1~trusty1