[Libguestfs] [libvirt-users] Resize errors with virt-resize/vgchange

[Richard W.M. Jones]

On Tue, Jul 23, 2013 at 07:18:30PM -0400, Alex wrote:
> Hi,
> 
> >> >> > # virt-resize -d --expand /dev/sda1 --LV-expand /dev/mapper/prop-home
> >> >> > prop-1.img prop-expand.img
> >> >> > command line: virt-resize -d --expand /dev/sda1 --LV-expand
> >> >> > /dev/mapper/prop-home prop-1.img prop-expand.img
> >> >> > Examining prop-1.img ...
> >> >> > libguestfs: trace: add_drive "prop-1.img" "readonly:true"
> >> >> > libguestfs: trace: add_drive = 0
> >> >> > libguestfs: trace: add_drive "prop-expand.img" "readonly:false"
> >> >> > libguestfs: trace: add_drive = 0
> >> >> > libguestfs: trace: launch
> >> >> > libguestfs: trace: get_tmpdir
> >> >> > libguestfs: trace: get_tmpdir = "/tmp"
> >> >> > libguestfs: trace: get_cachedir
> >> >> > libguestfs: trace: get_cachedir = "/var/tmp"
> >> >> > libguestfs: trace: disk_format "/var/lib/libvirt/images/prop-expand.img"
> >> >> > libguestfs: trace: disk_format = "raw"
> >> >> > libguestfs: trace: get_cachedir
> >> >> > libguestfs: trace: get_cachedir = "/var/tmp"
> >> >> > [...] 100% --:--
> >> >> > libguestfs: trace: launch = 0
> >> >> > libguestfs: trace: lvm_set_filter "/dev/sda"
> >> >> > libguestfs: trace: lvm_set_filter = -1 (error)
> >> >> > Fatal error: exception Guestfs.Error("lvm_set_filter: vgchange:
> >> >> > Couldn't find device with uuid zouQ8X-qxqJ-mp6p-pzg3-mi2i-K9YM-A763Kc.
> >> >> >   Refusing activation of partial LV home. Use --partial to override.
> >> >> >   Refusing activation of partial LV swap. Use --partial to override.

Does this guest have multiple disks?

> >> >> > libguestfs: trace: close
> >> >> > libguestfs: trace: internal_autosync
> >> >> > libguestfs: trace: internal_autosync = 0
> >> >> >
> >> >> > I don't understand this error message. I also see that vgchange
> >> >> > doesn't even have a 'partial' option, so I'm not sure how to
> >> >> > troubleshoot it. Here is the filesystem layout for this system:
> >> >
> >> > Which version of libguestfs, and where did you install it from?
> >>
> >> It was installed via yum on fedora18:
> >>
> >> # rpm -qva|grep guest
> >> libguestfs-tools-c-1.20.9-1.fc18.x86_64
> >> libguestfs-tools-1.20.9-1.fc18.x86_64
> >> libguestfs-1.20.9-1.fc18.x86_64
> >
> > OK, in that case it's (unfortunately) not what I was thinking it was :-(
> >
> > If you set:
> >
> >   export LIBGUESTFS_DEBUG=1
> >
> > before running virt-resize then you will get a huge amount of extra
> > debugging, which could be very valuable.  If you post that lot
> > somewhere it would be helpful.
> >
> > However it's definitely a bug of some sort.  I will open a Bugzilla
> > bug later unless you get there first.
> 
> It's going to take me a bit of time to retest this with debugging
> info. This happened during a production change window I was given for
> this. I have the images backed up on another server for testing, but
> will take me a day or two. I'd appreciate it if you would open the bug
> to get us started and in front of some other people...

I opened the bug:

https://bugzilla.redhat.com/show_bug.cgi?id=987829

Please add the debug information when you can.

> Come to think of it, considering it's a bug, how are other people
> resizing VMs with LVM partitions? Should I plan to find an alternate
> method to do this?

I've never seen this problem when resizing VMs with logical
volumes before.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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