Public bug reported:
Users reported they were unable to connect to instance consoles via
either Horizon or direct URL. Upon investigation we found errors
suggesting the address and port were in use:
2017-08-23 14:51:56.248 1355081 INFO nova.console.websocketproxy [-] WebSocket
server settings:
2017-08-23 14:51:56.248 1355081 INFO nova.console.websocketproxy [-] - Listen
on 0.0.0.0:6080
2017-08-23 14:51:56.248 1355081 INFO nova.console.websocketproxy [-] - Flash
security policy server
2017-08-23 14:51:56.248 1355081 INFO nova.console.websocketproxy [-] - Web
server (no directory listings). Web root: /usr/share/novnc
2017-08-23 14:51:56.248 1355081 INFO nova.console.websocketproxy [-] - No
SSL/TLS support (no cert file)
2017-08-23 14:51:56.249 1355081 CRITICAL nova [-] error: [Errno 98] Address
already in use
2017-08-23 14:51:56.249 1355081 ERROR nova Traceback (most recent call last):
2017-08-23 14:51:56.249 1355081 ERROR nova File "/usr/bin/nova-novncproxy",
line 10, in <module>
2017-08-23 14:51:56.249 1355081 ERROR nova sys.exit(main())
2017-08-23 14:51:56.249 1355081 ERROR nova File
"/usr/lib/python2.7/dist-packages/nova/cmd/novncproxy.py", line 41, in main
2017-08-23 14:51:56.249 1355081 ERROR nova port=CONF.vnc.novncproxy_port)
2017-08-23 14:51:56.249 1355081 ERROR nova File
"/usr/lib/python2.7/dist-packages/nova/cmd/baseproxy.py", line 73, in proxy
2017-08-23 14:51:56.249 1355081 ERROR nova
RequestHandlerClass=websocketproxy.NovaProxyRequestHandler
2017-08-23 14:51:56.249 1355081 ERROR nova File
"/usr/lib/python2.7/dist-packages/websockify/websocket.py", line 909, in
start_server
2017-08-23 14:51:56.249 1355081 ERROR nova tcp_keepintvl=self.tcp_keepintvl)
2017-08-23 14:51:56.249 1355081 ERROR nova File
"/usr/lib/python2.7/dist-packages/websockify/websocket.py", line 698, in socket
2017-08-23 14:51:56.249 1355081 ERROR nova sock.bind(addrs[0][4])
2017-08-23 14:51:56.249 1355081 ERROR nova File
"/usr/lib/python2.7/socket.py", line 224, in meth
2017-08-23 14:51:56.249 1355081 ERROR nova return
getattr(self._sock,name)(*args)
2017-08-23 14:51:56.249 1355081 ERROR nova error: [Errno 98] Address already in
use
2017-08-23 14:51:56.249 1355081 ERROR nova
This lead us to the discovery of a stuck nova-novncproxy process after
stopping the service. Once we sent a kill -HUP to that process, we were
able to start the nova-novncproxy and restore service to the users.
This was not the first time we have had to restart nova-novncproxy
services after users reported that were unable to connect with VNC. This
time, as well as at least 2 other times, we have seen the following
errors in the nova-novncproxy.log during the time frame of the issue:
gaierror: [Errno -8] Servname not supported for ai_socktype
which seems to correspond to a log entries for connection strings with
an invalid port ('port': u'-1'). As well as a bunch of:
error: [Errno 104] Connection reset by peer
** Affects: nova (Ubuntu)
Importance: Undecided
Status: New
** Tags: canonical-bootstack
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https://bugs.launchpad.net/bugs/1715254
Title:
nova-novncproxy process gets wedged, requiring kill -HUP
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