On Tuesday 23 February 2016 15:21:17 Richard W.M. Jones wrote:
 As for the particular question about lack of /etc/fstab.  Are you
 getting some kind of error when using the guestmount -i option?  It
 used to be (a long time ago) that libguestfs inspection[1] could not
 handle guests that did not have /etc/fstab, but that should be fixed
 in recent versions. 
Not really: /etc/fstab is currently used [1] as criteria to detect
whether the content of a partition is the root of a Linux installation.
To check what the inspection of libguestfs would find in an image, run
the 'virt-inspector' standalone tool and check the <mountpoints> and
<filesystems> tags in the resulting XML.
[1] src/inspect-fs.c, check_filesystem function
Thanks,
-- 
Pino Toscano