Re: [fedora-virt] Need to read guests logs.
On Thu, Nov 04, 2010 at 06:51:44PM +0000, Frank Murphy wrote:
I have a guest that will not boot properly.
While I have it like that,
how can I get access to the logs. (boot,dmesg)
I am looking at install libguestfs,
before I do, is there an easy example included?
Refer to this why I need them:
https://bugzilla.redhat.com/show_bug.cgi?id=649823
You have several choices. To read the log files:
virt-cat Guest /var/log/messages # or /var/log/dmesg etc
or:
guestfish --ro -i -d Guest
<fs> less /var/log/messages
For recovering the guest:
virt-edit Guest /boot/grub/grub.conf
or:
guestfish -i -d Guest
<fs> emacs /boot/grub/grub.conf
or:
virt-rescue Guest
<rescue> mount /dev/vg_foo/lv_root /sysroot
<rescue> mount /dev/vda1 /sysroot/boot
<rescue> vi /sysroot/boot/grub/grub.conf
We don't have a way that you can read 'dmesg' if it just exists in
memory (hasn't been written to disk). We _used_ to have this
capability, and will do so in future, but not right now.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-df lists disk usage of guests without needing to install any
software inside the virtual machine. Supports Linux and Windows.
http://et.redhat.com/~rjones/virt-df/