NOTE: CentOS Enterprise Linux 5 is built from the Red Hat Enterprise Linux source code. Other than logo and name changes CentOS Enterprise Linux 5 is compatible with the equivalent Red Hat version. This document applies equally to both Red Hat and CentOS Enterprise Linux 5.
Red Hat Virtualization features the xend daemon and qemu-dm
process, two utilities that write the multiple log files to the
/var/log/xen/ directory:
xend.log is the logfile that contains
all the data collected by the xend daemon, whether it is a
normal system event, or an operator initiated action. All
virtual machine operations (such as create, shutdown,
destroy, etc.) appears here. The xend.log is usually the
first place to look when you track down event or performance
problems. It contains detailed entries and conditions of the
error messages.
xend-debug.log is the logfile that
contains records of event errors from xend and the
Virtualization subsystems (such as framebuffer, Python
scripts, etc.).
xen-hotplug-log is the logfile that
contains data from hotplug events. If a device or a network
script does not come online, the event appears here.
qemu-dm.[PID].log is the logfile
created by the qemu-dm process for each fully virtualized
guest. When using this logfile, you must retrieve the given
qemu-dm process PID, by using the ps command to examine
process arguments to isolate the qemu-dm process on the
virtual machine. Note that you must replace the [PID] symbol
with the actual PID qemu-dm process.
If you encounter any errors with the Virtual Machine Manager,
you can review the generated data in the virt-manager.log file
that resides in the /.virt-manager directory. Note that every
time you start the Virtual Machine Manager, it overwrites the
existing logfile contents. Make sure to backup the
virt-manager.log file, before you restart the Virtual Machine
manager after a system error.
