Update Lvm2 package

[Mauro Sánchez]

Hello.
I have a cluster with two nodes and I have to update the lvm2 package.
Should I remove the node from the cluster before updating the package
or that is not necesary?
Thanks.
Greetings, Mauro.

[Iustin Pop]

On Tue, Sep 25, 2012 at 09:00:00AM -0300, Mauro S�nchez wrote:
> Hello.
> I have a cluster with two nodes and I have to update the lvm2 package.
> Should I remove the node from the cluster before updating the package
> or that is not necesary?

If there will be no "traffic" on the cluster at that moment, it's not
needed to do anything. Otherwise, it's best to drain the queue before
upgrading, but removing the node from the cluster is not needed.

iustin

[Mauro Sánchez]

2012/9/25 Iustin Pop <ius...@google.com>:

> On Tue, Sep 25, 2012 at 09:00:00AM -0300, Mauro Sánchez wrote:
>> Hello.
>> I have a cluster with two nodes and I have to update the lvm2 package.
>> Should I remove the node from the cluster before updating the package
>> or that is not necesary?
>
> If there will be no "traffic" on the cluster at that moment, it's not
> needed to do anything. Otherwise, it's best to drain the queue before
> upgrading, but removing the node from the cluster is not needed.
>
> iustin

Hello, I have updated the package and everything went just fine.
I did the update because I wanted to fix an error with the gnt-backup
of some of the instances I had.
The problem I have now is that I get a diferent error when I do this:
gnt-backup export -n node instance

I get the following errors with all the instances I try to backup.
Wed Oct 3 13:05:03 2012 Shutting down instance inst6b.grupogaviglio.zp
Wed Oct 3 13:05:14 2012 Creating a snapshot of disk/0 on node
xen-03.grupogaviglio.zp
Wed Oct 3 13:05:19 2012 - WARNING: Could not snapshot disk/0 on node
xen-03.grupogaviglio.zp: Cannot find block device
<LogicalVolume(/dev/xenvg/4ae6a2f8-7465-4a85-b29c-f59267c9ea85.disk0_data,
not visible, size=2048m)>
Wed Oct 3 13:05:19 2012 Creating a snapshot of disk/1 on node
xen-03.grupogaviglio.zp
Wed Oct 3 13:05:19 2012 - WARNING: Could not snapshot disk/1 on node
xen-03.grupogaviglio.zp: Cannot find block device
<LogicalVolume(/dev/xenvg/d2f0be0e-7a9c-49d3-96c3-71de705673df.disk1_data,
not visible, size=4096m)>
Wed Oct 3 13:05:19 2012 Starting instance inst6b.grupogaviglio.zp
Wed Oct 3 13:05:24 2012 Finalizing export on xen-03.grupogaviglio.zp
Wed Oct 3 13:05:25 2012 - WARNING: Could not finalize export for
instance inst6b.grupogaviglio.zp on node xen-03.grupogaviglio.zp:
Error while executing backend function: [Errno 2] No such file or
directory: '/var/lib/ganeti/export/inst6b.grupogaviglio.zp.new/config.iniFsW6IV.new'
Failure: command execution error:
Export failed, errors in export finalization, disk export: disk(s) 0, 1

I think it is because i the logical volumens id had change.
Any ideas on this?
Thanks a lot.
Mauro.

[Mauro Sánchez]

Also, when I do:
gnt-cluster verify

This is the output:
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/34093c18-a3a0-408b-8d73-b728565285be.disk0_data missing
on node xen-04.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/34093c18-a3a0-408b-8d73-b728565285be.disk0_meta missing
on node xen-04.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/6d7f1063-6209-46b7-92bb-e481be312874.disk1_data missing
on node xen-04.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/6d7f1063-6209-46b7-92bb-e481be312874.disk1_meta missing
on node xen-04.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/60515fed-1428-4b80-855d-90d6a1e3017a.disk2_data missing
on node xen-04.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/60515fed-1428-4b80-855d-90d6a1e3017a.disk2_meta missing
on node xen-04.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/34093c18-a3a0-408b-8d73-b728565285be.disk0_data missing
on node xen-03.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/34093c18-a3a0-408b-8d73-b728565285be.disk0_meta missing
on node xen-03.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/6d7f1063-6209-46b7-92bb-e481be312874.disk1_data missing
on node xen-03.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/6d7f1063-6209-46b7-92bb-e481be312874.disk1_meta missing
on node xen-03.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/60515fed-1428-4b80-855d-90d6a1e3017a.disk2_data missing
on node xen-03.grupogaviglio.zp
Wed Oct 3 16:29:20 2012 - ERROR: instance inst4.grupogaviglio.zp:
volume xenvg/60515fed-1428-4b80-855d-90d6a1e3017a.disk2_meta missing
on node xen-03.grupogaviglio.zp

But the instance is working fine.
Cheers.

2012/10/3 Mauro Sánchez <mau...@gmail.com>:

[Iustin Pop]

On Wed, Oct 03, 2012 at 01:18:44PM -0300, Mauro S�nchez wrote:
> 2012/9/25 Iustin Pop <ius...@google.com>:

Huh, why did the ID change?

iustin

[Mauro Sánchez]

2012/10/3 Iustin Pop <ius...@google.com>:

> On Wed, Oct 03, 2012 at 01:18:44PM -0300, Mauro Sánchez wrote:
>> 2012/9/25 Iustin Pop <ius...@google.com>:

Sorry, my mistake. The id didn't change. If I do a ls /dev/xenvg the
volumes are there and they have the same name.
I don't know why the gnt-backup and gnt-cluster verify complains about
they don't exist.

[Iustin Pop]

On Wed, Oct 03, 2012 at 07:45:44PM -0300, Mauro S�nchez wrote:
> 2012/10/3 Iustin Pop <ius...@google.com>:

> > On Wed, Oct 03, 2012 at 01:18:44PM -0300, Mauro S�nchez wrote:
> >> 2012/9/25 Iustin Pop <ius...@google.com>:

Are you by any chance running an old ganeti version which don't support
newer LVM versions? Check the list arhives, there were a number of
discussions; basically anything older than 2.6.0 _could_ have problems.

regards,
iustin

[Mauro Sánchez]

2012/10/3 Iustin Pop <ius...@google.com>:

> On Wed, Oct 03, 2012 at 07:45:44PM -0300, Mauro Sánchez wrote:
>> 2012/10/3 Iustin Pop <ius...@google.com>:

>> > On Wed, Oct 03, 2012 at 01:18:44PM -0300, Mauro Sánchez wrote:
>> >> 2012/9/25 Iustin Pop <ius...@google.com>:

Ah, that's the problem. I am running Ganti 2.4.5
I'm going to update it as soon as posible.
Thanks a lot Iustin.
Mauro.

[Mauro Sánchez]

2012/10/3 Mauro Sánchez <mau...@gmail.com>:

Iustin, do you have any idea when will Ganeti 2.6.0 be available in
the Debian Testing (Wheezy) repository?

[Iustin Pop]

On Wed, Oct 03, 2012 at 08:26:59PM -0300, Mauro S�nchez wrote:
> 2012/10/3 Mauro S�nchez <mau...@gmail.com>:
> > 2012/10/3 Iustin Pop <ius...@google.com>:

> >> On Wed, Oct 03, 2012 at 07:45:44PM -0300, Mauro S�nchez wrote:
> >>> 2012/10/3 Iustin Pop <ius...@google.com>:

> >>> > On Wed, Oct 03, 2012 at 01:18:44PM -0300, Mauro S�nchez wrote:
> >>> >> 2012/9/25 Iustin Pop <ius...@google.com>:

It will not land in Wheezy, as 2.6 was not ready in time for the freeze.
But note that the 2.5 version in Wheezy works correctly with newer LVM:
I've added some patches that make it work correctly.

iustin

[Mauro Sánchez]

2012/10/3 Iustin Pop <ius...@google.com>:
> On Wed, Oct 03, 2012 at 08:26:59PM -0300, Mauro Sánchez wrote:
>> 2012/10/3 Mauro Sánchez <mau...@gmail.com>:
>> > 2012/10/3 Iustin Pop <ius...@google.com>:

>> >> On Wed, Oct 03, 2012 at 07:45:44PM -0300, Mauro Sánchez wrote:
>> >>> 2012/10/3 Iustin Pop <ius...@google.com>:

>> >>> > On Wed, Oct 03, 2012 at 01:18:44PM -0300, Mauro Sánchez wrote:
>> >>> >> 2012/9/25 Iustin Pop <ius...@google.com>:

Hi Iustin.
I've upgraded ganeti and now everything works just fine.
Thanks a lot!
Mauro.