[Libguestfs] --rbd volume access--

[Shumaila Naeem]

i want to do it remotely through command :

although if i use python language the thing works for me you can see the
python code
>>> import guestfs
>>> g = guestfs.GuestFS (python_return_dict=True)
>>> g.add_drive_opts ("/dev/null", readonly=1)
>>> g.config('-set',
"drive.hd0.file=rbd:ssd-clonetest-rule5/ubuntu-12.04--1.raw.img")
>>>
>>> g.launch()
>>> g.inspect_os()
['/dev/ubuntu-1204-vg/root']
>>> g.inspect_get_distro('/dev/ubuntu-1204-vg/root')
'ubuntu'

but when i try to do the same from command line it failed:

firstly i run command

guestfish -- add /dev/null : config -set
drive.hd0.file=rbd:ssd-clonetest-rule5/ubuntu-12.04--1.raw.img : run :
inspect-os

this is returning me :
/dev/ubuntu-1204-vg/root

when i pass this output to get-distro , it failed

guestfish -- add /dev/null : config -set
drive.hd0.file=rbd:ssd-clonetest-rule5/ubuntu-12.04--1.raw.img : run :
inspect-get-distro /dev/ubuntu-1204-vg/root
libguestfs: error: no inspection data: call guestfs_inspect_os first

this time i have called run

Regards
Shumaila Naeem


On Fri, Mar 14, 2014 at 12:59 PM, Richard W.M. Jones <rjones at redhat.com>wrote:

> On Fri, Mar 14, 2014 at 12:47:08PM +0500, Shumaila Naeem wrote:
> > Also i can't use the newest version of libguestfs as im on a production
> > system and i could not use the newest version due to some limitations.
>
> You can use the new version without installing it.  However you would
> need to be able to install a compiler and other dependencies, which
> may not be possible on a production system.
>
> > Also the new version is not available in repo.
> >
> >
> >
> > Im getting antother problem :
> >
> > while running these commands im getting error :
> > guestfish -- add /dev/null : config -set
> > drive.hd0.file=rbd:ssd-clonetest-rule5/ubuntu-12.04--1.raw.img : run :
> > inspect-os
> > /dev/ubuntu-1204-vg/root
> > [root at EQkvm0101 ~]# guestfish -- add /dev/null : config -set
> > drive.hd0.file=rbd:ssd-clonetest-rule5/ubuntu-12.04--1.raw.img :
> >  inspect-get-distro /dev/ubuntu-1204-vg/root
> > libguestfs: error: no inspection data: call guestfs_inspect_os first
>
> You have to call inspect-os, and pass the returned value back to
> inspect-get-distro.  This is (to say the least) awkward in guestfish,
> but much easier if you use a real programming language (libguestfs has
> many language bindings, see http://libguestfs.org).  Also you are
> missing a call to 'run'.
>
> Here's how you could do it in Perl:
>
> ------------------------------------------------------------
> #!/usr/bin/perl -w
>
> use strict;
> use Sys::Guestfs;
>
> my $g = Sys::Guestfs->new ();
> $g->add_drive_opts ("/dev/null", readonly => 1);
> # RHEL 6 hack for adding Ceph drives:
> $g->config ("-set",
>
> "drive.hd0.file=rbd:ssd-clonetest-rule5/ubuntu-12.04--1.raw.img");
> $g->launch ();
>
> my @roots = $g->inspect_os ();
> if (@roots == 0) {
>     die "no operating systems found";
> }
> my $root = $roots[0];
> my $distro = $g->inspect_get_distro ($root);
> print "distro = $distro\n";
> ------------------------------------------------------------
>
> Rich.
>
> --
> Richard Jones, Virtualization Group, Red Hat
> http://people.redhat.com/~rjones
> Read my programming blog: http://rwmj.wordpress.com
> Fedora now supports 80 OCaml packages (the OPEN alternative to F#)
>
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