JuJu made deploying of machines in easy way..BUT!!! once somthing goes wrong with the bootstrap node, it will be quit difficult to handle for some reasons!!! I got this problem when I was reading about juju and first node as bootrap one and zookeeper basically will run on this node to orchestrate the others. I just shutdown my bootstrap node, and destroy the juju env. Once again, boot the machine and followed by juju bootraping. JuJu status in verbose mode shows something like that:
> ,665:1874(0x7f61904e1700):ZOO_INFO@zookeeper_init@727: Initiating
> client connection, host=localhost:50835 sessionTimeout=30000
> watcher=0x7f618ffca700 sessionId=0 sessionPasswd=<null>
> context=0x3259710 flags=0
> ,667:1874(0x7f6187fff700):ZOO_INFO@check_events@1585: initiated connection to server [127.0.0.1:50835]
> ,672:1874(0x7f6187fff700):ZOO_INFO@check_events@1632: session
> establishment complete on server [127.0.0.1:50835],
> sessionId=0x13d45787f1d0002, negotiated timeout=30000 ,678 DEBUG
> Environment is initialized. ,679 INFO Connected to environment.
> ,929 ERROR Machine provider information missing: machine 1
> Traceback (most recent call last):
> File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line
> 1045, in _inlineCallbacks
> result = g.send(result)
> File "/usr/lib/python2.7/dist-packages/juju/state/utils.py", line 257, in
_get_node_value
> returnValue(node_data.get(key, default))
> File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line
> 1022, in returnValue
> raise _DefGen_Return(val)
> _DefGen_Return ,975:1874(0x7f61904e1700)**:**ZOO_INFO@zookeeper_close@2302: Closing
zookeeper** sessionId=0x13d45787f1d0002 to [127.0.0.1:50835]**
machines:
0:
**agent-state: not-started**
dns-name: MaaS03
instance-id: /MAAS/api/1.0/nodes/node-3afe0928-859f-11e2-b241-0050561dd02a/
instance-state: unknown
Seems as zookeeper is not accepting session on the bootstraped node. This kind of problems could affect all the env.!!! is there any clue for thuis important point?

@maas:~$ juju ssh 0 ,031 INFO Connecting to environment... ,685 INFO Connected to environment. ,756 INFO Waiting for machine to come up.– Aimar Mar 8 at 8:48