Connecting to the docker bootstrap node fails

[SethVgr]

Checklist

• [done ] installed pyethapp inside a virtualenv

System/environment

• OS: debian 8.3 Jessie x64, kernel version 3.16.0-4-amd64, virtual machine, running on VirtualBox, host machine Win7 x64, NAT network settings used
• python version: 2.7.9
• pyethapp version: 1.2.2/linux2/py2.7.9
• installation method (pip & pypi/git & setup.py): git & setup.py

Expected behaviour

pyethapp should connect to the bootstrap node running inside docker. Similarly, pyethapp should also be able to connect to a standalone bootstrap node

Observed behaviour

pyethapp tries to bind to the listening socket and throws a socket busy exception (in both instances; standalone and through docker):

Launching bootstrap node:

$ pyethapp --data-dir pyethapp_server_bootstrap/ -c eth.network_id=1337 -c node.privkey_hex=091bd6067cb4612df85d9c1ff85cc47f259ced4d4cd99816b14f35650f59c322 -b 'enode://288b97262895b1c7ec61cf314c2e2004407d0a5dc77566877aad1f2a36659c8b698f4b56fd06c4a0c0bf007b4cfb3e7122d907da3b005fa90e724441902eb19e@localhost:30303' -c eth.genesis=custom_genesis_block.json -m 1000 run

Launching client node:

pyethapp --data-dir pyethapp_client/ -c eth.network_id=1337 -b 'enode://288b97262895b1c7ec61cf314c2e2004407d0a5dc77566877aad1f2a36659c8b698f4b56fd06c4a0c0bf007b4cfb3e7122d907da3b005fa90e724441902eb19e@localhost:30303' -c eth.genesis=custom_genesis_block.json run (--fake) # tried both options with and without fake

gives:

INFO:p2p.peermgr    starting listener addr=('0.0.0.0', 30303)
Traceback (most recent call last):
  File "/usr/local/bin/pyethapp", line 9, in <module>
    load_entry_point('pyethapp', 'console_scripts', 'pyethapp')()
  File "/usr/local/lib/python2.7/dist-packages/click-6.6-py2.7.egg/click/core.py", line 716, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/click-6.6-py2.7.egg/click/core.py", line 696, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python2.7/dist-packages/click-6.6-py2.7.egg/click/core.py", line 1060, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python2.7/dist-packages/click-6.6-py2.7.egg/click/core.py", line 889, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python2.7/dist-packages/click-6.6-py2.7.egg/click/core.py", line 534, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/click-6.6-py2.7.egg/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/mg13/Work/3dtrust/Topics/BlockchainsIn3DPrinting/Apps/pyethapp/pyethapp/app.py", line 232, in run
    app.start()
  File "/usr/local/lib/python2.7/dist-packages/devp2p-0.7.2-py2.7.egg/devp2p/app.py", line 37, in start
    service.start()
  File "/usr/local/lib/python2.7/dist-packages/devp2p-0.7.2-py2.7.egg/devp2p/peermanager.py", line 152, in start
    self.server.start()
  File "/usr/local/lib/python2.7/dist-packages/gevent-1.1.0-py2.7-linux-x86_64.egg/gevent/baseserver.py", line 291, in start
    self.init_socket()
  File "/usr/local/lib/python2.7/dist-packages/gevent-1.1.0-py2.7-linux-x86_64.egg/gevent/server.py", line 80, in init_socket
    self.socket = self.get_listener(self.address, self.backlog, self.family)
  File "/usr/local/lib/python2.7/dist-packages/gevent-1.1.0-py2.7-linux-x86_64.egg/gevent/server.py", line 91, in get_listener
    return _tcp_listener(address, backlog=backlog, reuse_addr=self.reuse_addr, family=family)
  File "/usr/local/lib/python2.7/dist-packages/gevent-1.1.0-py2.7-linux-x86_64.egg/gevent/server.py", line 177, in _tcp_listener
    sock.bind(address)
  File "<string>", line 1, in bind
socket.error: [Errno 98] Address already in use: ('0.0.0.0', 30303)

Is it possible to specify the listening port?