[2.0] The IP of a Machine's BMC is not listed on the subnet details page

[Andres Rodriguez]

A BMC has an ip such: 192.168.122.2
The Subnet details page does not list it:

192.168.122.1 Static unleashed virbr0 Rack and region controller MAAS Wed, 24 Aug. 2016 11:39:14
192.168.122.190 Observed node03 eth0 Machine MAAS Wed, 24 Aug. 2016 11:39:12
192.168.122.191 Observed node02 eth1 Machine MAAS Wed, 24 Aug. 2016 11:39:12
192.168.122.192 Observed node01 eth0 Machine MAAS Wed, 24 Aug. 2016 11:39:15

So, I tried to add a device in MAAS with the IP above, and the result was:

2016-08-24 11:40:55 [-] Error on request (88) device.create: IP address is already in use.
        Traceback (most recent call last):
          File "/usr/lib/python3.5/threading.py", line 862, in run
            self._target(*self._args, **self._kwargs)
          File "/usr/lib/python3/dist-packages/provisioningserver/utils/twisted.py", line 790, in worker
            return target()
          File "/usr/lib/python3/dist-packages/twisted/_threads/_threadworker.py", line 46, in work
            task()
          File "/usr/lib/python3/dist-packages/twisted/_threads/_team.py", line 190, in doWork
            task()
        --- <exception caught here> ---
          File "/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 246, in inContext
            result = inContext.theWork()
          File "/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 262, in <lambda>
            inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
          File "/usr/lib/python3/dist-packages/twisted/python/context.py", line 118, in callWithContext
            return self.currentContext().callWithContext(ctx, func, *args, **kw)
          File "/usr/lib/python3/dist-packages/twisted/python/context.py", line 81, in callWithContext
            return func(*args,**kw)
          File "/usr/lib/python3/dist-packages/provisioningserver/utils/twisted.py", line 823, in callInContext
            return func(*args, **kwargs)
          File "/usr/lib/python3/dist-packages/maasserver/utils/orm.py", line 602, in call_within_transaction
            return func_outside_txn(*args, **kwargs)
          File "/usr/lib/python3/dist-packages/maasserver/utils/orm.py", line 421, in retrier
            return func(*args, **kwargs)
          File "/usr/lib/python3.5/contextlib.py", line 30, in inner
            return func(*args, **kwds)
          File "/usr/lib/python3/dist-packages/maasserver/websockets/handlers/device.py", line 279, in create
            INTERFACE_LINK_TYPE.STATIC, subnet, ip_address=ip_address)
          File "/usr/lib/python3/dist-packages/maasserver/models/interface.py", line 819, in link_subnet
            alloc_type=alloc_type, user=user)
          File "/usr/lib/python3/dist-packages/maasserver/models/interface.py", line 765, in _link_subnet_static
            "IP address is already in use.")
        maasserver.exceptions.StaticIPAddressUnavailable: IP address is already in use.

[Mike Pontillo (mpontillo)]

As of MAAS 2.2, these are actually listed on the subnet details page, but they show up as "Unknown".

We could do a better job indicating the usage of each IP address.