12:16 p.m.
On Wed, Aug 01, 2012 at 11:47:14AM -0500, Shawn Kennedy wrote:
Problem:
When trying to inspect the guest using a command like 'virt-ls', we
get back:
~]# virt-ls -d guest /path
virt-ls: multi-boot operating systems are not supported by the -i option
What does virt-inspector2 [this is RHEL 6] display for this guest?
virt-inspector2 -d guest
virt-ls fundamentally doesn't work with multi-boot guests. However
that doesn't mean to say you can't use libguestfs, you just need to
use some lower level tools or write a Perl/Python/whatever script
against the API. Have a look at the second example in the
guestfs-perl(3) / guestfs-python(3) man pages to give you some ideas
how to go about this.
By the way it's probably better to use the RHEL 6.3 package,
libguestfs 1.16.19, since it has more bugs fixed.
Question:
We know it's because we have 2 filesystems in the guest and
we have no problem using the '-m' option on the lower-level tools,
but how do we know which filesystem is mounted?? A simple
'mount' command could tell us that, but how to run it if I
don't know which -m mount point to use??
If I understand your question correctly, then the 'mountpoints'
command lists what is mounted, eg:
$ guestfish -c qemu:///system -d F16x64 -i --ro
Welcome to guestfish, the libguestfs filesystem interactive shell for
editing virtual machine filesystems.
Type: 'help' for help on commands
'man' to read the manual
'quit' to quit the shell
Operating system: Fedora release 16 (Verne)
/dev/mapper/vg_f16x64-lv_root mounted on /
/dev/vda2 mounted on /boot
<fs> mountpoints
/dev/vg_f16x64/lv_root: /
/dev/vda2: /boot
(or 'mounts' which does the same but only lists the devices).
Please send replies to the mailing list. I hopefully deleted any
specifics of your environment in this reply.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v
1:19 p.m.
New subject: libguestfs question - multiple partitions in the guest
Hi Richard,
Because I have 2 filesystems (one in a mounted LV and one in a unmounted
LV), I get 2 sets of mountpoints in virt-inspector2 ....
<mountpoints>
<mountpoint dev="/dev/VG1/LV0001.root">/</mountpoint>
<mountpoint dev="/dev/VG1/LV0001.var">/var</mountpoint>
<mountpoint dev="/dev/VG1/LV0001.app1">/app1</mountpoint>
<mountpoint dev="/dev/sda1">/boot</mountpoint>
<mountpoint dev="/dev/VG1/home">/home</mountpoint>
<mountpoint dev="/dev/VG1/logs">/logs</mountpoint>
<mountpoint dev="/dev/VG1/cores">/cores</mountpoint>
<mountpoint dev="/dev/VG1/storage">/storage</mountpoint>
</mountpoints>
<mountpoints>
<mountpoint dev="/dev/VG1/LV0002.root">/</mountpoint>
<mountpoint dev="/dev/VG1/LV0002.var">/var</mountpoint>
<mountpoint dev="/dev/VG1/LV0002.app1">/app1</mountpoint>
<mountpoint dev="/dev/sda1">/boot</mountpoint>
<mountpoint dev="/dev/VG1/home">/home</mountpoint>
<mountpoint dev="/dev/VG1/logs">/logs</mountpoint>
<mountpoint dev="/dev/VG1/cores">/cores</mountpoint>
<mountpoint dev="/dev/VG1/storage">/storage</mountpoint>
</mountpoints>
So, which one is the real one?? If I log into the guest directly,
I know the /dev/VG1/LV0002* is the mounted partition (by
using 'mount' command or by examining /etc/fstab).
(from the guest)
# mount | grep root
/dev/mapper/VG1-LV0002.root on / type ext3 (rw)
As much as I would like to, we cannot move the RHEL release to
the next release. Project restrictions and all ... :-)
Lastly, where is 'guestfish' installed on the system?? It's not installed
on my system, even though I have installed the RHEL6.2 RPMs.
# rpm -qa | grep libguest
python-libguestfs-1.7.17-26.el6.x86_64
libguestfs-1.7.17-26.el6.x86_64
libguestfs-tools-c-1.7.17-26.el6.x86_64
libguestfs-mount-1.7.17-26.el6.x86_64
libguestfs-tools-1.7.17-26.el6.x86_64
# guestfish
-bash: guestfish: command not found
-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com]
On Wed, Aug 01, 2012 at 11:47:14AM -0500, Shawn Kennedy wrote:
> Problem:
> When trying to inspect the guest using a command like 'virt-ls', we
> get back:
>
> ~]# virt-ls -d guest /path
> virt-ls: multi-boot operating systems are not supported by the -i option
What does virt-inspector2 [this is RHEL 6] display for this guest?
virt-inspector2 -d guest
virt-ls fundamentally doesn't work with multi-boot guests. However
that doesn't mean to say you can't use libguestfs, you just need to
use some lower level tools or write a Perl/Python/whatever script
against the API. Have a look at the second example in the
guestfs-perl(3) / guestfs-python(3) man pages to give you some ideas
how to go about this.
By the way it's probably better to use the RHEL 6.3 package,
libguestfs 1.16.19, since it has more bugs fixed.
> Question:
> We know it's because we have 2 filesystems in the guest and
> we have no problem using the '-m' option on the lower-level tools,
> but how do we know which filesystem is mounted?? A simple
> 'mount' command could tell us that, but how to run it if I
> don't know which -m mount point to use??
If I understand your question correctly, then the 'mountpoints'
command lists what is mounted, eg:
$ guestfish -c qemu:///system -d F16x64 -i --ro
Welcome to guestfish, the libguestfs filesystem interactive shell for
editing virtual machine filesystems.
Type: 'help' for help on commands
'man' to read the manual
'quit' to quit the shell
Operating system: Fedora release 16 (Verne)
/dev/mapper/vg_f16x64-lv_root mounted on /
/dev/vda2 mounted on /boot
><fs> mountpoints
/dev/vg_f16x64/lv_root: /
/dev/vda2: /boot
(or 'mounts' which does the same but only lists the devices).
2:54 p.m.
New subject: libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 01:19:45PM -0500, Shawn Kennedy wrote:
Hi Richard,
Because I have 2 filesystems (one in a mounted LV and one in a unmounted
LV), I get 2 sets of mountpoints in virt-inspector2 ....
<mountpoints>
<mountpoint dev="/dev/VG1/LV0001.root">/</mountpoint>
<mountpoint dev="/dev/VG1/LV0001.var">/var</mountpoint>
<mountpoint dev="/dev/VG1/LV0001.app1">/app1</mountpoint>
<mountpoint dev="/dev/sda1">/boot</mountpoint>
<mountpoint dev="/dev/VG1/home">/home</mountpoint>
<mountpoint dev="/dev/VG1/logs">/logs</mountpoint>
<mountpoint dev="/dev/VG1/cores">/cores</mountpoint>
<mountpoint dev="/dev/VG1/storage">/storage</mountpoint>
</mountpoints>
<mountpoints>
<mountpoint dev="/dev/VG1/LV0002.root">/</mountpoint>
<mountpoint dev="/dev/VG1/LV0002.var">/var</mountpoint>
<mountpoint dev="/dev/VG1/LV0002.app1">/app1</mountpoint>
<mountpoint dev="/dev/sda1">/boot</mountpoint>
<mountpoint dev="/dev/VG1/home">/home</mountpoint>
<mountpoint dev="/dev/VG1/logs">/logs</mountpoint>
<mountpoint dev="/dev/VG1/cores">/cores</mountpoint>
<mountpoint dev="/dev/VG1/storage">/storage</mountpoint>
</mountpoints>
virt-inspector is hopefully seeing two separate <operatingsystem>'s
here.
So, which one is the real one?? If I log into the guest directly,
I know the /dev/VG1/LV0002* is the mounted partition (by
using 'mount' command or by examining /etc/fstab).
So I think what you're asking is, what root device is currently
mounted in the running guest, when you're inspecting the guest from
outside (hopefully read-only) using libguestfs.
This isn't something that libguestfs can know since all it can see is
what is in the disks, not the state of the running guest itself. But
there are some heuristics you could use instead:
(1) You could look at tell-tale signs to see which root device has
most recently been mounted. Probably the simplest thing is to look at
the date of /var/log/messages in each potential root, and choose the
most recent one (since /var/log/messages is reliably and frequently
updated when a guest boots and runs).
(2) You could try doing what virt-v2v does, which is to parse the grub
configuration to find out what root parameter is being passed to the
kernel at boot time. I believe this is the code ...
http://git.fedorahosted.org/git/?p=virt-v2v.git;a=blob;f=lib/Sys/VirtConv...
(from the guest)
# mount | grep root
/dev/mapper/VG1-LV0002.root on / type ext3 (rw)
As much as I would like to, we cannot move the RHEL release to
the next release. Project restrictions and all ... :-)
Lastly, where is 'guestfish' installed on the system?? It's not installed
on my system, even though I have installed the RHEL6.2 RPMs.
# rpm -qa | grep libguest
python-libguestfs-1.7.17-26.el6.x86_64
libguestfs-1.7.17-26.el6.x86_64
libguestfs-tools-c-1.7.17-26.el6.x86_64
libguestfs-mount-1.7.17-26.el6.x86_64
libguestfs-tools-1.7.17-26.el6.x86_64
# guestfish
-bash: guestfish: command not found
That's odd. It should be in libguestfs-tools-c. Try:
rpm -ql libguestfs-tools-c | grep guestfish
and check that your $PATH is set correctly.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://et.redhat.com/~rjones/virt-top
3:08 p.m.
New subject: libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 08:54:01PM +0100, Richard W.M. Jones wrote:
(1) You could look at tell-tale signs to see which root device has
most recently been mounted. Probably the simplest thing is to look at
the date of /var/log/messages in each potential root, and choose the
most recent one (since /var/log/messages is reliably and frequently
updated when a guest boots and runs).
As in the attached program.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v
3:33 p.m.
New subject: libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 08:54:01PM +0100, Richard W.M. Jones wrote:
> (1) You could look at tell-tale signs to see which root device has
> most recently been mounted. Probably the simplest thing is to look at
> the date of /var/log/messages in each potential root, and choose the
> most recent one (since /var/log/messages is reliably and frequently
> updated when a guest boots and runs).
As in the attached program.
Neat!! I just looked at it - very nice!! We will give it a try
and report our findings! If it does work, we will have to convert
it to Python (preferred).
Thanks!
Shawn
3:38 p.m.
New subject: libguestfs question - multiple partitions in the guest
-----Original Message-----
From: libguestfs-bounces(a)redhat.com [mailto:libguestfs-bounces@redhat.com] On Behalf Of
Shawn Kennedy
Sent: Wednesday, August 01, 2012 3:34 PM
To: libguestfs(a)redhat.com
Cc: 'Smudde, Mark Alan (Mark)'; 'Tockstein, James E (Jim)'
Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the guest
> On Wed, Aug 01, 2012 at 08:54:01PM +0100, Richard W.M. Jones wrote:
> > (1) You could look at tell-tale signs to see which root device has
> > most recently been mounted. Probably the simplest thing is to look at
> > the date of /var/log/messages in each potential root, and choose the
> > most recent one (since /var/log/messages is reliably and frequently
> > updated when a guest boots and runs).
>
> As in the attached program.
Neat!! I just looked at it - very nice!! We will give it a try
and report our findings! If it does work, we will have to convert
it to Python (preferred).
Success!!
# ./mostrecent.pl /storage/images/guest.img
Youngest root filesystem is: /dev/VG1/LV0002.root
With that knowledge, we can then mount (ro) the right mount point
and inspect further!
Thank you again!
Shawn
3:23 p.m.
New subject: libguestfs question - multiple partitions in the guest
Hi Rich,
Let's handle the easy one first:
# rpm -qa | grep libguestfs-tools-c
libguestfs-tools-c-1.7.17-26.el6.x86_64
# rpm -ql libguestfs-tools-c
/usr/bin/virt-cat
/usr/bin/virt-df
/usr/bin/virt-filesystems
/usr/bin/virt-inspector2
/usr/bin/virt-ls
/usr/bin/virt-rescue
/usr/share/man/man1/virt-cat.1.gz
/usr/share/man/man1/virt-df.1.gz
/usr/share/man/man1/virt-filesystems.1.gz
/usr/share/man/man1/virt-inspector2.1.gz
/usr/share/man/man1/virt-ls.1.gz
/usr/share/man/man1/virt-rescue.1.gz
It's not in that package according to my distro (RHEL6.2).
Thanks,
Shawn
-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com]
Sent: Wednesday, August 01, 2012 2:54 PM
To: Shawn Kennedy
Cc: libguestfs(a)redhat.com; 'Smudde, Mark Alan (Mark)'; 'Tockstein, James E
(Jim)'
Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 01:19:45PM -0500, Shawn Kennedy wrote:
> Lastly, where is 'guestfish' installed on the system?? It's not
installed
> on my system, even though I have installed the RHEL6.2 RPMs.
>
> # rpm -qa | grep libguest
> python-libguestfs-1.7.17-26.el6.x86_64
> libguestfs-1.7.17-26.el6.x86_64
> libguestfs-tools-c-1.7.17-26.el6.x86_64
> libguestfs-mount-1.7.17-26.el6.x86_64
> libguestfs-tools-1.7.17-26.el6.x86_64
>
> # guestfish
> -bash: guestfish: command not found
That's odd. It should be in libguestfs-tools-c. Try:
rpm -ql libguestfs-tools-c | grep guestfish
and check that your $PATH is set correctly.
3:52 p.m.
New subject: libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 03:23:24PM -0500, Shawn Kennedy wrote:
Hi Rich,
Let's handle the easy one first:
# rpm -qa | grep libguestfs-tools-c
libguestfs-tools-c-1.7.17-26.el6.x86_64
# rpm -ql libguestfs-tools-c
/usr/bin/virt-cat
/usr/bin/virt-df
/usr/bin/virt-filesystems
/usr/bin/virt-inspector2
/usr/bin/virt-ls
/usr/bin/virt-rescue
/usr/share/man/man1/virt-cat.1.gz
/usr/share/man/man1/virt-df.1.gz
/usr/share/man/man1/virt-filesystems.1.gz
/usr/share/man/man1/virt-inspector2.1.gz
/usr/share/man/man1/virt-ls.1.gz
/usr/share/man/man1/virt-rescue.1.gz
It's not in that package according to my distro (RHEL6.2).
Sorry .. it's RHEL 6.2 so the package is called 'guestfish'.
# yum install guestfish
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
New in Fedora 11: Fedora Windows cross-compiler. Compile Windows
programs, test, and build Windows installers. Over 70 libraries supprt'd
http://fedoraproject.org/wiki/MinGW http://www.annexia.org/fedora_mingw
3:55 p.m.
New subject: libguestfs question - multiple partitions in the guest
-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com]
Sent: Wednesday, August 01, 2012 3:53 PM
To: Shawn Kennedy
Cc: libguestfs(a)redhat.com; 'Smudde, Mark Alan (Mark)'; 'Tockstein, James E
(Jim)'
Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 03:23:24PM -0500, Shawn Kennedy wrote:
> Hi Rich,
>
> Let's handle the easy one first:
>
> # rpm -qa | grep libguestfs-tools-c
> libguestfs-tools-c-1.7.17-26.el6.x86_64
>
> # rpm -ql libguestfs-tools-c
> /usr/bin/virt-cat
> /usr/bin/virt-df
> /usr/bin/virt-filesystems
> /usr/bin/virt-inspector2
> /usr/bin/virt-ls
> /usr/bin/virt-rescue
> /usr/share/man/man1/virt-cat.1.gz
> /usr/share/man/man1/virt-df.1.gz
> /usr/share/man/man1/virt-filesystems.1.gz
> /usr/share/man/man1/virt-inspector2.1.gz
> /usr/share/man/man1/virt-ls.1.gz
> /usr/share/man/man1/virt-rescue.1.gz
>
> It's not in that package according to my distro (RHEL6.2).
Sorry .. it's RHEL 6.2 so the package is called 'guestfish'.
# yum install guestfish
Ah nuts! Looks like I missed a package when I pulled everything
together!! Thanks, I will add accordingly!
Shawn
3:31 p.m.
New subject: libguestfs question - multiple partitions in the guest
-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com]
Sent: Wednesday, August 01, 2012 2:54 PM
To: Shawn Kennedy
Cc: libguestfs(a)redhat.com; 'Smudde, Mark Alan (Mark)'; 'Tockstein, James E
(Jim)'
Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 01:19:45PM -0500, Shawn Kennedy wrote:
> Hi Richard,
>
> Because I have 2 filesystems (one in a mounted LV and one in a unmounted
> LV), I get 2 sets of mountpoints in virt-inspector2 ....
>
> <mountpoints>
> <mountpoint dev="/dev/VG1/LV0001.root">/</mountpoint>
> <mountpoint dev="/dev/VG1/LV0001.var">/var</mountpoint>
> <mountpoint
dev="/dev/VG1/LV0001.app1">/app1</mountpoint>
> <mountpoint dev="/dev/sda1">/boot</mountpoint>
> <mountpoint dev="/dev/VG1/home">/home</mountpoint>
> <mountpoint dev="/dev/VG1/logs">/logs</mountpoint>
> <mountpoint dev="/dev/VG1/cores">/cores</mountpoint>
> <mountpoint
dev="/dev/VG1/storage">/storage</mountpoint>
> </mountpoints>
>
> <mountpoints>
> <mountpoint dev="/dev/VG1/LV0002.root">/</mountpoint>
> <mountpoint dev="/dev/VG1/LV0002.var">/var</mountpoint>
> <mountpoint
dev="/dev/VG1/LV0002.app1">/app1</mountpoint>
> <mountpoint dev="/dev/sda1">/boot</mountpoint>
> <mountpoint dev="/dev/VG1/home">/home</mountpoint>
> <mountpoint dev="/dev/VG1/logs">/logs</mountpoint>
> <mountpoint dev="/dev/VG1/cores">/cores</mountpoint>
> <mountpoint
dev="/dev/VG1/storage">/storage</mountpoint>
> </mountpoints>
virt-inspector is hopefully seeing two separate <operatingsystem>'s
here.
Hi Rich,
It is. I took the liberty of snipping the output quite a bit. I can send
more, but I don't think that's worth the effort knowing it does
see two OSs.
> So, which one is the real one?? If I log into the guest
directly,
> I know the /dev/VG1/LV0002* is the mounted partition (by
> using 'mount' command or by examining /etc/fstab).
So I think what you're asking is, what root device is currently
mounted in the running guest, when you're inspecting the guest from
outside (hopefully read-only) using libguestfs.
Oh yes - Read only, especially since it's a live running guest! :-)
This isn't something that libguestfs can know since all it can
see is
what is in the disks, not the state of the running guest itself. But
there are some heuristics you could use instead:
(1) You could look at tell-tale signs to see which root device has
most recently been mounted. Probably the simplest thing is to look at
the date of /var/log/messages in each potential root, and choose the
most recent one (since /var/log/messages is reliably and frequently
updated when a guest boots and runs).
That's a good idea - inspecting deeper into the guests' LV to see which
one is live by looking for data that could tell you that. /var/log/messages
is one way to know (timestamp of the file).
(2) You could try doing what virt-v2v does, which is to parse the
grub
configuration to find out what root parameter is being passed to the
kernel at boot time. I believe this is the code ...
http://git.fedorahosted.org/git/?p=virt-
v2v.git;a=blob;f=lib/Sys/VirtConvert/Converter/RedHat.pm;h=6bda68bffad6fc959dbadadee89447df71245491;hb=H
EAD#l549
We will look into seeing what this is doing. looking at the grub config
will be the most correct way.
I wonder - maybe an new tool (virt-grub) to dump out the grub
content of the guest image (if linux)!! :-) :-) :-)
As always, Thanks!
Shawn
4:02 p.m.
New subject: libguestfs question - multiple partitions in the guest
-----Original Message-----
From: libguestfs-bounces(a)redhat.com [mailto:libguestfs-bounces@redhat.com] On Behalf Of
Shawn Kennedy
> From: Richard W.M. Jones [mailto:rjones@redhat.com]
> (2) You could try doing what virt-v2v does, which is to parse the grub
> configuration to find out what root parameter is being passed to the
> kernel at boot time. I believe this is the code ...
>
> http://git.fedorahosted.org/git/?p=virt-
>
v2v.git;a=blob;f=lib/Sys/VirtConvert/Converter/RedHat.pm;h=6bda68bffad6fc959dbadadee89447df71245491;hb=H
> EAD#l549
We will look into seeing what this is doing. looking at the grub config
will be the most correct way.
That URL doesn't work. Do you have a working link??
Thanks!
Shawn
4:25 p.m.
New subject: libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 04:02:27PM -0500, Shawn Kennedy wrote:
> -----Original Message-----
> From: libguestfs-bounces(a)redhat.com [mailto:libguestfs-bounces@redhat.com] On Behalf
Of Shawn Kennedy
> > From: Richard W.M. Jones [mailto:rjones@redhat.com]
> > (2) You could try doing what virt-v2v does, which is to parse the grub
> > configuration to find out what root parameter is being passed to the
> > kernel at boot time. I believe this is the code ...
> >
> > http://git.fedorahosted.org/git/?p=virt-
> >
>
v2v.git;a=blob;f=lib/Sys/VirtConvert/Converter/RedHat.pm;h=6bda68bffad6fc959dbadadee89447df71245491;hb=H
> > EAD#l549
>
> We will look into seeing what this is doing. looking at the grub config
> will be the most correct way.
That URL doesn't work. Do you have a working link??
That's strange, did fedorahosted just switch from gitweb to cgit?
http://git.fedorahosted.org/cgit/virt-v2v.git/tree/lib/Sys/VirtConvert/Co...
or: http://bit.ly/Mk4XAg
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#)
http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora
4:49 p.m.
New subject: libguestfs question - multiple partitions in the guest
-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com]
On Wed, Aug 01, 2012 at 04:02:27PM -0500, Shawn Kennedy wrote:
> > -----Original Message-----
> > From: libguestfs-bounces(a)redhat.com [mailto:libguestfs-bounces@redhat.com] On
Behalf Of Shawn
Kennedy
> > > From: Richard W.M. Jones [mailto:rjones@redhat.com]
> > > (2) You could try doing what virt-v2v does, which is to parse the grub
> > > configuration to find out what root parameter is being passed to the
> > > kernel at boot time. I believe this is the code ...
> > >
> > > http://git.fedorahosted.org/git/?p=virt-
> > >
> >
v2v.git;a=blob;f=lib/Sys/VirtConvert/Converter/RedHat.pm;h=6bda68bffad6fc959dbadadee89447df71245491;hb=H
> > > EAD#l549
> >
> > We will look into seeing what this is doing. looking at the grub config
> > will be the most correct way.
>
>
> That URL doesn't work. Do you have a working link??
That's strange, did fedorahosted just switch from gitweb to cgit?
http://git.fedorahosted.org/cgit/virt-v2v.git/tree/lib/Sys/VirtConvert/Co...
or: http://bit.ly/Mk4XAg
Success! I can view it now.
Thanks!
Shawn
4:22 p.m.
New subject: libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 03:31:19PM -0500, Shawn Kennedy wrote:
I wonder - maybe an new tool (virt-grub) to dump out the grub
content of the guest image (if linux)!! :-) :-) :-)
It's actually pretty simple to script this. See attached
(requires a grub1 guest).
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v
5:02 p.m.
New subject: libguestfs question - multiple partitions in the guest
-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com]
Sent: Wednesday, August 01, 2012 4:22 PM
To: Shawn Kennedy
Cc: libguestfs(a)redhat.com; 'Smudde, Mark Alan (Mark)'; 'Tockstein, James E
(Jim)'
Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 03:31:19PM -0500, Shawn Kennedy wrote:
> I wonder - maybe an new tool (virt-grub) to dump out the grub
> content of the guest image (if linux)!! :-) :-) :-)
It's actually pretty simple to script this. See attached
(requires a grub1 guest).
Luckily, we still are grub1 .....
# grub --version
grub (GNU GRUB 0.97)
So I ran it and it tells me I have 2 OSs ...
root: /dev/VG1/LV0001.root
root: /dev/VG1/LV0002.root
I thought it might dump the running grub, but then again, it
doesn't know what "running" is it looks like using /var/log/messages
file to determine what is (likely) mounted in the guest.
Thanks!
Shawn
5:06 p.m.
New subject: libguestfs question - multiple partitions in the guest
virt-filesystems -d guest | grep root
gave me that same output
On 8/1/2012 5:02 PM, Shawn Kennedy wrote:
> -----Original Message-----
> From: Richard W.M. Jones [mailto:rjones@redhat.com]
> Sent: Wednesday, August 01, 2012 4:22 PM
> To: Shawn Kennedy
> Cc: libguestfs(a)redhat.com; 'Smudde, Mark Alan (Mark)'; 'Tockstein, James
E (Jim)'
> Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the guest
>
> On Wed, Aug 01, 2012 at 03:31:19PM -0500, Shawn Kennedy wrote:
>> I wonder - maybe an new tool (virt-grub) to dump out the grub
>> content of the guest image (if linux)!! :-) :-) :-)
>
> It's actually pretty simple to script this. See attached
> (requires a grub1 guest).
Luckily, we still are grub1 .....
# grub --version
grub (GNU GRUB 0.97)
So I ran it and it tells me I have 2 OSs ...
root: /dev/VG1/LV0001.root
root: /dev/VG1/LV0002.root
I thought it might dump the running grub, but then again, it
doesn't know what "running" is it looks like using /var/log/messages
file to determine what is (likely) mounted in the guest.
Thanks!
Shawn
5:09 p.m.
New subject: libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 05:02:28PM -0500, Shawn Kennedy wrote:
> -----Original Message-----
> From: Richard W.M. Jones [mailto:rjones@redhat.com]
> Sent: Wednesday, August 01, 2012 4:22 PM
> To: Shawn Kennedy
> Cc: libguestfs(a)redhat.com; 'Smudde, Mark Alan (Mark)'; 'Tockstein, James
E (Jim)'
> Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the guest
>
> On Wed, Aug 01, 2012 at 03:31:19PM -0500, Shawn Kennedy wrote:
> > I wonder - maybe an new tool (virt-grub) to dump out the grub
> > content of the guest image (if linux)!! :-) :-) :-)
>
> It's actually pretty simple to script this. See attached
> (requires a grub1 guest).
Luckily, we still are grub1 .....
# grub --version
grub (GNU GRUB 0.97)
So I ran it and it tells me I have 2 OSs ...
root: /dev/VG1/LV0001.root
root: /dev/VG1/LV0002.root
I thought it might dump the running grub, [...]
I thought it would do too. One problem with Augeas is that it relies
on the exact location of the configuration file.
You can try changing:
display ("/files/etc/grub.conf")
to:
display ("/files")
and see if the grub config shows up anywhere in the (likely to be
huge) output.
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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5:36 p.m.
New subject: libguestfs question - multiple partitions in the guest
-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com]
Sent: Wednesday, August 01, 2012 5:09 PM
To: Shawn Kennedy
Cc: libguestfs(a)redhat.com; 'Smudde, Mark Alan (Mark)'; 'Tockstein, James E
(Jim)'
Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 05:02:28PM -0500, Shawn Kennedy wrote:
> > -----Original Message-----
> > From: Richard W.M. Jones [mailto:rjones@redhat.com]
> > Sent: Wednesday, August 01, 2012 4:22 PM
> > To: Shawn Kennedy
> > Cc: libguestfs(a)redhat.com; 'Smudde, Mark Alan (Mark)'; 'Tockstein,
James E (Jim)'
> > Subject: Re: [Libguestfs] libguestfs question - multiple partitions in the
guest
> >
> > On Wed, Aug 01, 2012 at 03:31:19PM -0500, Shawn Kennedy wrote:
> > > I wonder - maybe an new tool (virt-grub) to dump out the grub
> > > content of the guest image (if linux)!! :-) :-) :-)
> >
> > It's actually pretty simple to script this. See attached
> > (requires a grub1 guest).
>
> Luckily, we still are grub1 .....
>
> # grub --version
> grub (GNU GRUB 0.97)
>
> So I ran it and it tells me I have 2 OSs ...
>
> root: /dev/VG1/LV0001.root
> root: /dev/VG1/LV0002.root
>
> I thought it might dump the running grub, [...]
I thought it would do too. One problem with Augeas is that it relies
on the exact location of the configuration file.
You can try changing:
display ("/files/etc/grub.conf")
to:
display ("/files")
and see if the grub config shows up anywhere in the (likely to be
huge) output.
You are right /files is a very big list and after 10+ minutes
of running, it wasn't done. I narrowed it down (/files/boot)
to see if I could find the files in /boot (after all,
/boot/grub/grub.com is where it really is) and alas,
it doesn't find it, just found this:
root: /dev/VG1/LV0001.root
/files/boot/grub/device.map/hd0 /dev/vda
root: /dev/VG1/LV0002.root
/files/boot/grub/device.map/hd0 /dev/vda
Thanks,
Shawn
12:37 p.m.
New subject: libguestfs question - multiple partitions in the guest
On Wed, Aug 01, 2012 at 05:36:12PM -0500, Shawn Kennedy wrote:
You are right /files is a very big list and after 10+ minutes
of running, it wasn't done. I narrowed it down (/files/boot)
to see if I could find the files in /boot (after all,
/boot/grub/grub.com is where it really is) and alas,
it doesn't find it, just found this:
root: /dev/VG1/LV0001.root
/files/boot/grub/device.map/hd0 /dev/vda
root: /dev/VG1/LV0002.root
/files/boot/grub/device.map/hd0 /dev/vda
Augeas isn't required. You can just download and parse the grub
configuration yourself if you know where it is located, ie:
lines = g.read_lines ("/boot/grub/grub.conf")
for line in lines:
<your parser here>
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://et.redhat.com/~rjones/virt-top
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18 comments
3 participants
participants (3)
-
Jim Tockstein -
Richard W.M. Jones -
Shawn Kennedy