Fix for broken vnc console on Openstack Essex under Debian/Ubuntu

Fix for broken vnc console on Openstack Essex under Debian/Ubuntu

Fix for broken vnc console on Openstack Essex under Debian/Ubuntu

The Openstack dashboard novnc console broke after the last two security release of essex openstack (2012.1.1-14/2012.1.1-15). Here is the solution Fix for broken vnc console on Openstack Essex under Debian/Ubuntu.


You will see an Error Message like this in your /var/log/nova/nova-consoleauth.log:

AUDIT nova.consoleauth.manager [req-6eb532ae-b024-4ada-8bb5-95ebc132dd2f None None] Checking Token: 32373fb4-c9ac-4f87-9418-7a6f13606874, True)
ERROR nova.rpc.amqp [req-6eb532ae-b024-4ada-8bb5-95ebc132dd2f None None] Exception during message handling
TRACE nova.rpc.amqp Traceback (most recent call last):
TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/rpc/", line 253, in _process_data
TRACE nova.rpc.amqp     rval = node_func(context=ctxt, **node_args)
TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/consoleauth/", line 102, in check_token
TRACE nova.rpc.amqp     if token_valid and self._validate_console(token):
TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/consoleauth/", line 91, in _validate_console
TRACE nova.rpc.amqp     console_valid = self.compute_api.validate_vnc_console(context,
TRACE nova.rpc.amqp NameError: global name 'context' is not defined
TRACE nova.rpc.amqp
ERROR nova.rpc.amqp [req-6eb532ae-b024-4ada-8bb5-95ebc132dd2f None None] Returning exception global name 'context' is not defined to caller
ERROR nova.rpc.amqp [req-6eb532ae-b024-4ada-8bb5-95ebc132dd2f None None] ['Traceback (most recent call last):n', '  File "/usr/lib/python2.7/dist-packages/nova/rpc/", line 253, in _process_datan    rval = node_func(context=ctxt, **node_args)n', '  File "/usr/lib/python2.7/dist-packages/nova/consoleauth/", line 102, in check_tokenn    if token_valid and self._validate_console(token):n', '  File "/usr/lib/python2.7/dist-packages/nova/consoleauth/", line 91, in _validate_consolen    console_valid = self.compute_api.validate_vnc_console(context,n', "NameError: global name 'context' is not definedn"]

So I’ve looked for quick solutions to get rid with the broken python scripts and built this diff patch out of two merged fixes i found in the openstack git reviews repository.

To fix your nova-consoleauth do following steps:

First of all download the patch set: openstack_novnc.tar.gz  into a directory of your choice.

unpack the archive:

tar xvzf openstack_novnc.tar.gz

apply the patch diffs by running this commands on your root shell:

patch -p0 <
patch -p0 <
patch -p0 <


and one more important part is to restart the services after patching them:

service nova-api restart
service nova-console restart
service nova-consoleauth restart


Jules is the owner and author of ISPIRE.ME. He's a Linux System Engineer, Tech fanatic and an Open Source fan.

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7 Responses

  1. Alberto Molina Coballes says:

    This patch fixes this issue on Debian, thanks!
    Could you please report about this patch in #703242

  2. rex-han says:

    Thanks for your bug-fix, I resolved the problem.

  3. Max says:

    Thank you!!

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