[Pkg-xen-devel] Bug#519064: xen-utils-common: hvm migration fails because of missing /var/lib/xen/save

[Andreas Unterkircher]

Package: xen-utils-common
Version: 3.2.0-2
Severity: normal


When I was trying to migrate (xm migrate) a guest from one host to another,
it simply fails. On the source host the virtual machine gets destroyed
without any warning message - on the destination host I see the following
error message in /var/log/xen/xend.log

[2009-03-10 08:01:22 9846] ERROR (XendCheckpoint:52) read_exact: EOF trying to read 21 (buf='')

and a python trace

[2009-03-10 08:01:22 9846] ERROR (XendDomain:1136) Restore failed
Traceback (most recent call last):
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomain.py", line 1134, in domain_restore_fd
    return XendCheckpoint.restore(self, fd, paused=paused)
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendCheckpoint.py", line 261, in restore
    "invalid device model signature read")
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendCheckpoint.py", line 53, in read_exact
    raise XendError(errmsg)
XendError: invalid device model signature read

After some debugging I found out, that /etc/default/xendomains references a not
existing directory:

srv-vm01:~# grep ^XENDOMAINS_SAVE /etc/default/xendomains 
XENDOMAINS_SAVE=/var/lib/xen/save

After then I created /var/lib/xen/save on both hosts per hand, and migration worked
in both directions.

Cheers,
Andreas

-- System Information:
Debian Release: 5.0
  APT prefers stable
  APT policy: (990, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-1-xen-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages xen-utils-common depends on:
ii  lsb-base                      3.2-20     Linux Standard Base 3.2 init scrip
ii  udev                          0.125-7    /dev/ and hotplug management daemo
ii  xenstore-utils                3.2.1-2    Xenstore utilities for Xen

xen-utils-common recommends no packages.

xen-utils-common suggests no packages.

-- no debconf information