[Pkg-libvirt-maintainers] Bug#564034: netcat doesn't exit and virt-manager hangs

[Vaclav Ovsik]

Package: virt-manager
Version: 0.8.2-1
Severity: normal

Hi,
I have problems on connection to remote machine using qemu+ssh://...
Connecting to remote machine (Debian Lenny) -> open some virtual console
-> close virtual; and virt-manager freezes. When I kill netcat for VNC on
server side virt-manager revive. I have installed netcat-openbsd on
server side as libvirt-bin recommends.

This is known problem. I'm not certain if this is virt-manager problem
or netcat problem.

Please see:
https://bugzilla.redhat.com/show_bug.cgi?id=517778
http://www.mail-archive.com/et-mgmt-tools@redhat.com/msg02589.html
http://www.mail-archive.com/et-mgmt-tools@redhat.com/msg02593.html

The following change solves me the problem with VNC connection:

--- /usr/share/virt-manager/virtManager/console.py.orig	2009-12-19 20:00:24.000000000 +0100
+++ /usr/share/virt-manager/virtManager/console.py	2010-01-07 09:37:56.000000000 +0100
@@ -506,7 +506,7 @@
         if username:
             argv += ['-l', username]
 
-        argv += [ server, "nc", vncaddr, str(vncport) ]
+        argv += [ server, "nc", "-q", "0", vncaddr, str(vncport) ]
 
         logging.debug("Creating SSH tunnel: %s" % argv)
 
But when I do a connection & then virt-manager Quit, on server side
grows number of netcats for VM system:

23003 ?        Ss     0:00 nc -U /var/run/libvirt/libvirt-sock

On local (client) side grows number of ssh connections with nc. These are not
killed by virt-manager. In the case of kill a local ssh process, nc on the
server side remains nevertheless.

Thanks for your time
Regards
-- 
Zito


-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (x86_64)

Kernel: Linux 2.6.32-trunk-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=cs_CZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages virt-manager depends on:
ii  librsvg2-common               2.26.0-1   SAX-based renderer library for SVG
ii  python                        2.5.4-5    An interactive high-level object-o
ii  python-dbus                   0.83.0-1   simple interprocess messaging syst
ii  python-glade2                 2.16.0-1   GTK+ bindings: Glade support
ii  python-gnome2                 2.28.0-1   Python bindings for the GNOME desk
ii  python-gtk-vnc                0.3.10-2   A VNC viewer widget for GTK+ (Pyth
ii  python-gtk2                   2.16.0-1   Python bindings for the GTK+ widge
ii  python-libvirt                0.7.5-2    libvirt Python bindings
ii  python-support                1.0.6      automated rebuilding support for P
ii  python-urlgrabber             3.1.0-5    A high-level cross-protocol url-gr
ii  python-vte                    1:0.22.5-1 Python bindings for the VTE widget
ii  virtinst                      0.500.1-2  Programs to create and clone virtu

Versions of packages virt-manager recommends:
ii  hal                           0.5.14-1   Hardware Abstraction Layer
ii  libvirt-bin                   0.7.5-2    the programs for the libvirt libra

Versions of packages virt-manager suggests:
ii  virt-viewer                   0.0.3-2    Displaying the graphical console o

-- no debconf information