Virtual Machine Manager unable to view GUI console

[James Crow]

I have a Dell R410 server with 11.10 amd64 (upgraded from 11.04) running KVM. I connect to the server with the graphical Virtual Machine Manager from my desktop running 11.10. I am able to connect to the console for each guest once. If I close the connection and then try to reopen, the message "Connecting to graphical console for guest" stays displayed in place of the console. If I restart libvirt-bin on the server, I can then view the console once. After each time I access the GUI console I must restart libvirt-bin to view it again.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: libvirt-bin 0.9.2-4ubuntu15.1
ProcVersionSignature: Ubuntu 3.0.0-13.22-server 3.0.6
Uname: Linux 3.0.0-13-server x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Mon Dec 12 12:46:01 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Release amd64 (20110426)
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: libvirt
UpgradeStatus: Upgraded to oneiric on 2011-12-08 (4 days ago)

[Serge Hallyn (serge-hallyn)]

Thanks for taking the time to report this bug.

I can reproduce this, somewhat, using remote connections. Can you verify that this happens to you connecting remotely, that is libvirt is not on the same host as virt-manager?

However, restarting libvirt on the server is not necessary (for me) - I can simply close and restart virt-manager on the client. Can you also confirm (or deny) that?

[James Crow (crow-jamesm)]

virt-manager is on a separate host from libvirt. The server that is running libvirt does not have X or really anything beyond what is required for KVM.

I am also able to get virt-manager to reconnect if I close virt-manager. virt-manager was connecting to two KVM installations (one local, one remote) with the remote one being the only one with any running guests. I deleted the local connection and can now exit/restart virt-manager to regain access to my GUI console.

[Serge Hallyn (serge-hallyn)]

Thanks, James. I can't tell yet whether this is a bug in libvirt or in virt-manager itself, but I can reproduce it with libvirt on precise as well.

[Serge Hallyn (serge-hallyn)]

Found it. vmmConsolePages.close_viewer() needs to do the following to close tunnels:

        if self.tunnels is not None:
            self.tunnels.close_all()
            self.tunnels = None

with that change, I am able to reconnect. Apparently the ssh tunnels cannot be reused.

[Serge Hallyn (serge-hallyn)]

With this debdiff applied, I can reconnect to remote vnc sessions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package virt-manager - 0.9.0-1ubuntu4

---------------
virt-manager (0.9.0-1ubuntu4) precise; urgency=low

  * Force ssh tunnels to close when closing a Viewer window, so that
    reconnections will work. (LP: #903307)
 -- Serge Hallyn <email address hidden> Wed, 14 Dec 2011 12:29:44 -0600

[Rolf Leggewie (r0lf)]

oneiric has seen the end of its life and is no longer receiving any updates. Marking the oneiric task for this ticket as "Won't Fix".