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6d1b3edc6e
When QEMU fails to start, libvirt read its error output and reports it
back in an error message. However, when libvirtd is configured to log
debug messages, one would get the following unhelpful garbage:
virsh # start cd
error: Failed to start domain cd
error: internal error process exited while connecting to monitor: \
2013-04-22 14:24:54.214+0000: 2194219: debug : virFileClose:72 : \
Closed fd 21
2013-04-22 14:24:54.214+0000: 2194219: debug : virFileClose:72 : \
Closed fd 27
2013-04-22 14:24:54.215+0000: 2194219: debug : virFileClose:72 : \
Closed fd 3
2013-04-22 14:24:54.215+0000: 2194220: debug : virExec:602 : Run \
hook 0x7feb8f600bf0 0x7feb86ef9300
2013-04-22 14:24:54.215+0000: 2194220: debug : qemuProcessHook:2507 \
: Obtaining domain lock
2013-04-22 14:24:54.216+0000: 2194220: debug : \
virDomainLockProcessStart:170 : plugin=0x7feb780261f0 \
dom=0x7feb7802a360 paused=1 fd=0x7feb86ef8ec4
2013-04-22 14:24:54.216+0000: 2194220: debug : \
virDomainLockManagerNew:128 : plugin=0x7feb780261f0 \
dom=0x7feb7802a360 withResources=1
2013-04-22 14:24:54.216+0000: 2194220: debug : \
virLockManagerPluginGetDriver:297 : plugin=0x7feb780261f0
2013-04-22 14:24:54.216+0000: 2194220: debug : \
virLockManagerNew:321 : driver=0x7feb8ef08640 type=0 nparams=5 \
params=0x7feb86ef8d60 flags=0
2013-04-22 14:24:54.216+000
instead of (the output with this patch applied):
virsh # start cd
error: Reconnected to the hypervisor
error: Failed to start domain cd
error: internal error process exited while connecting to monitor: \
char device redirected to /dev/pts/33 (label charserial0)
qemu-system-x86_64: -drive file=/home/vm/systemrescuecd-x86-1.2.0.\
iso,if=none,id=drive-ide0-1-0,readonly=on,format=raw,cache=none: \
could not open disk image /home/vm/systemrescuecd-x86-1.2.0.iso: \
Permission denied
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>