Re: [Libguestfs] Script to read systemd journal of a guest to find its IP address
On Sat, Jun 14, 2014 at 10:37:12AM +0100, Richard W.M. Jones wrote:
On Sat, Jun 14, 2014 at 11:41:03AM +0530, Kashyap Chamarthy wrote:
> g.add_drive (image, format='qcow2')
You must use:
g.add_drive (image, readonly=1)
otherwise you risk disk corruption if the guest is live (eg. if the
mount command has to replay the journal).
Ah. I did use 'readonly=1' while testing, but forgot to mention it while
writing this. Thanks for catching.
> g.launch ()
> #print g.list_partitions()
>
> # Set trace
> #g.set_trace (1)
>
> g.mount_options ("ro", root_filesystem, "/")
What I'd do differently here is to use inspection to detect the root
(and other) filesystems. You never know if /var is on a separate
partition ...
Here is the example code (see call to "g.inspect_os" and the code with
the comment "Mount up the disks like guestfish -i").
http://libguestfs.org/guestfs-python.3.html#example-2:-inspect-a-virtual-...
> g.sync ()
No need to sync if you've added the drive readonly.
Noted.
Thanks for these useful review comments, I'll test with these changes.
--
/kashyap