The errors I see in there:

Error #1
=======

2015-05-22 08:39:23+0000 [HTTPPageGetter,client] Unhandled Error
	Traceback (most recent call last):
	Failure: twisted.web.error.Error: 503 Service Unavailable
	
2015-05-22 08:39:25+0000 [HTTPPageGetter,client] Unhandled Error
	Traceback (most recent call last):
	Failure: twisted.web.error.Error: 503 Service Unavailable

Guessing this is the cluster trying to connect to the region before it's fully up.

Error #2
=======

2015-05-22 08:39:28+0000 [-] Downloading images failed.
	Traceback (most recent call last):
	  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 423, in errback
	    self._startRunCallbacks(fail)
	  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
	    self._runCallbacks()
	  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1155, in gotResult
	    _inlineCallbacks(r, g, deferred)
	--- <exception caught here> ---
	  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1097, in _inlineCallbacks
	    result = result.throwExceptionIntoGenerator(g)
	  File "/usr/lib/python2.7/dist-packages/twisted/python/failure.py", line 389, in throwExceptionIntoGenerator
	    return g.throw(self.type, self.value, self.tb)
	  File "/usr/lib/python2.7/dist-packages/provisioningserver/pserv_services/image_download_service.py", line 135, in maybe_start_download
	    yield self._start_download()
	  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1097, in _inlineCallbacks
	    result = result.throwExceptionIntoGenerator(g)
	  File "/usr/lib/python2.7/dist-packages/twisted/python/failure.py", line 389, in throwExceptionIntoGenerator
	    return g.throw(self.type, self.value, self.tb)
	  File "/usr/lib/python2.7/dist-packages/provisioningserver/pserv_services/image_download_service.py", line 121, in _start_download
	    get_proxy_url("https"))
	  File "/usr/lib/python2.7/dist-packages/twisted/python/threadpool.py", line 191, in _worker
	    result = context.call(ctx, function, *args, **kwargs)
	  File "/usr/lib/python2.7/dist-packages/twisted/python/context.py", line 118, in callWithContext
	    return self.currentContext().callWithContext(ctx, func, *args, **kw)
	  File "/usr/lib/python2.7/dist-packages/twisted/python/context.py", line 81, in callWithContext
	    return func(*args,**kw)
	  File "/usr/lib/python2.7/dist-packages/provisioningserver/utils/twisted.py", line 154, in wrapper
	    return func(*args, **kwargs)
	  File "/usr/lib/python2.7/dist-packages/provisioningserver/rpc/boot_images.py", line 87, in _run_import
	    boot_resources.import_images(sources)
	  File "/usr/lib/python2.7/dist-packages/provisioningserver/import_images/boot_resources.py", line 246, in import_images
	    image_descriptions = download_all_image_descriptions(sources)
	  File "/usr/lib/python2.7/dist-packages/provisioningserver/import_images/download_descriptions.py", line 204, in download_all_image_descriptions
	    source['url'], keyring=source.get('keyring', None))
	  File "/usr/lib/python2.7/dist-packages/provisioningserver/import_images/download_descriptions.py", line 195, in download_image_descriptions
	    dumper.sync(reader, rpath)
	  File "/usr/lib/python2.7/dist-packages/simplestreams/mirrors/__init__.py", line 82, in sync
	    content, payload = reader.read_json(path)
	  File "/usr/lib/python2.7/dist-packages/simplestreams/mirrors/__init__.py", line 39, in read_json
	    raw = self.source(path).read().decode('utf-8')
	  File "/usr/lib/python2.7/dist-packages/simplestreams/contentsource.py", line 143, in read
	    self.open()
	  File "/usr/lib/python2.7/dist-packages/simplestreams/contentsource.py", line 139, in open
	    self.fd = self._open()
	  File "/usr/lib/python2.7/dist-packages/simplestreams/contentsource.py", line 135, in _open
	    raise myerr
	exceptions.IOError: Unable to open http://192.168.10.11/images-stream/streams/v1/index.json. mirrors=[]

This is the cluster trying to sync from the region before the region is up.

Error #3
=======

2015-05-22 08:39:24 [maasserver.start_up] ERROR: Database error during start-up
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
  File "/usr/lib/python2.7/dist-packages/twisted/python/threadpool.py", line 191, in _worker
    result = context.call(ctx, function, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/twisted/python/context.py", line 118, in callWithContext
    return self.currentContext().callWithContext(ctx, func, *args, **kw)
  File "/usr/lib/python2.7/dist-packages/twisted/python/context.py", line 81, in callWithContext
    return func(*args,**kw)
  File "/usr/lib/python2.7/dist-packages/maasserver/utils/orm.py", line 404, in call_within_transaction
    return func_outside_txn(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/maasserver/utils/orm.py", line 300, in retrier
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/django/db/transaction.py", line 339, in inner
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/maasserver/utils/__init__.py", line 229, in call_with_lock
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 189, in inner_start_up
    register_all_triggers()
  File "/usr/lib/python2.7/dist-packages/maasserver/utils/orm.py", line 399, in call_within_transaction
    return func_within_txn(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/django/db/transaction.py", line 339, in inner
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/maasserver/triggers.py", line 390, in register_all_triggers
    "nodegroupinterface_create_notify", "insert")
  File "/usr/lib/python2.7/dist-packages/maasserver/triggers.py", line 303, in register_trigger
    cursor.execute(trigger_sql)
  File "/usr/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
  File "/usr/lib/python2.7/dist-packages/django/db/utils.py", line 99, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/usr/lib/python2.7/dist-packages/django/db/backends/util.py", line 51, in execute
    return self.cursor.execute(sql)
OperationalError: deadlock detected
DETAIL:  Process 25691 waits for AccessExclusiveLock on relation 16924 of database 16385; blocked by process 25706.
Process 25706 waits for AccessShareLock on relation 16759 of database 16385; blocked by process 25691.
HINT:  See server log for query details.

2015-05-22 08:39:24 [maas.websocket.listener] Listening for notificaton from database.
2015-05-22 08:39:25 [maasserver.start_up] ERROR: Database error during start-up
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
OperationalError: deadlock detected
LINE 1: ...maasserver_nodegroup"."default_disable_ipv4" FROM "maasserve...
                                                             ^
DETAIL:  Process 25761 waits for AccessShareLock on relation 16759 of database 16385; blocked by process 25730.
Process 25730 waits for AccessExclusiveLock on relation 16924 of database 16385; blocked by process 25761.


This one is weird: seems there is a deadlock when accessing the DB… but this is happening within start_up and this is supposed to grab an exclusive lock before running…. this needs to be investigated.