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How do I setup a secure websocket connection (wss) for the 
nova-serialproxy service? I have the following setting on the 
compute node (nova.conf):
    [serial_console]
    enabled = True
    base_url = wss://<ip-of-controller-node>:6083/  # wss !!
    proxyclient_address = <ip-of-compute-node>

As soon as I want to use that with Horizon (via https) the 
nova-serialproxy service logs this trace (from the module 
"nova.console.websocketproxy"; timestamps and location truncated):

    [...] [-] exception vmsg 
/usr/lib/python2.7/site-packages/websockify/websocket.py:824
     Traceback (most recent call last):
       File "/usr/lib/python2.7/site-packages/websockify/websocket.py", 
line 874, in top_new_client
         client = self.do_handshake(startsock, address)
       File "/usr/lib/python2.7/site-packages/websockify/websocket.py", 
line 786, in do_handshake
         keyfile=self.key)
       File "/usr/lib/python2.7/site-packages/eventlet/green/ssl.py", line 
339, in wrap_socket
         return GreenSSLSocket(sock, *a, **kw)
       File "/usr/lib/python2.7/site-packages/eventlet/green/ssl.py", line 
64, in __init__
         ca_certs, do_handshake_on_connect and six.PY2, *args, **kw)
       File "/usr/lib64/python2.7/ssl.py", line 141, in __init__
         ciphers)
     SSLError: [Errno 336265225] _ssl.c:351: error:140B0009:SSL 
routines:SSL_CTX_use_PrivateKey_file:PEM lib

I assume that I have to set the "nova.conf" options "cert" and "key" 
([DEFAULT] section) on the controller node but I couldn't figure out
the right setup.

Thanks in advance!
Markus Zoeller (markus_z)