CentOS - Sep 2013 - Best Practice to remove an ISCSI LVM from a system

Hi,

I'd like to know what would be the best way to remove an iscsi lvm
storage from a server. (removing all reference to that storage etc.)

The storage in question will be reset and reformated and used on a
different server; so no LVM export is needed.

Do I have to do lvremove ..., vgremove ..., pvremove ... and do an

iscsiadm -m node -T ... -p ... -u and

iscsiadm -m node -o delete -T ... -p ...

in order to achieve that?

Or is there some more simple way?


	Thanks for any suggestion and best regards . G?tz

-- 
G?tz Reinicke
IT-Koordinator

Tel. +49 7141 969 82 420
Fax  +49 7141 969 55 420
E-Mail goetz.reinicke at filmakademie.de

Filmakademie Baden-W?rttemberg GmbH
Akademiehof 10
71638 Ludwigsburg
www.filmakademie.de

Eintragung Amtsgericht Stuttgart HRB 205016

Vorsitzender des Aufsichtsrats: J?rgen Walter MdL
Staatssekret?r im Ministerium f?r Wissenschaft,
Forschung und Kunst Baden-W?rttemberg

Gesch?ftsf?hrer: Prof. Thomas Schadt

G?tz Reinicke - IT Koordinator wrote:
> Hi,
>
> I'd like to know what would be the best way to remove an iscsi lvm
> storage from a server. (removing all reference to that storage etc.)
>
> The storage in question will be reset and reformated and used on a
> different server; so no LVM export is needed.
>
> Do I have to do lvremove ..., vgremove ..., pvremove ... and do an
>
> iscsiadm -m node -T ... -p ... -u and
>
> iscsiadm -m node -o delete -T ... -p ...
>
> in order to achieve that?
>
> Or is there some more simple way?
>
This may be a stupid question, but couldn't you simply umount the storage
from everywhere, maybe the iscsiadm commands, and then just unplug the
thing? Why do you need to do *anything* with lvm?

       mark

On 09/25/2013 08:58 AM, G?tz Reinicke - IT Koordinator
wrote:
> I'd like to know what would be the best way to remove an iscsi lvm
> storage from a server. (removing all reference to that storage etc.)
My approach would be:

* Disable all volume groups on the iSCSI LUN(s) with "vgchange -a n
..."

* Use iscsiadm to log out of the target and delete it from the database

* Run vgscan to update the LVM cache

HTH

-- 
=======================================================================Ian
Pilcher                                         arequipeno at gmail.com
Sometimes there's nothing left to do but crash and burn...or die trying.
========================================================================

On 9/25/2013 6:58 AM, G?tz Reinicke - IT Koordinator
wrote:
> I'd like to know what would be the best way to remove an iscsi lvm
> storage from a server. (removing all reference to that storage etc.)
>
> The storage in question will be reset and reformated and used on a
> different server; so no LVM export is needed.
>
> Do I have to do lvremove ..., vgremove ..., pvremove ... and do an
>
> iscsiadm -m node -T ... -p ... -u and
>
> iscsiadm -m node -o delete -T ... -p ...
>
> in order to achieve that?
>
> Or is there some more simple way?

umount any file systems, remove them from /etc/fstab, then vgremove the 
volume group should be sufficient to remove history of the LV's and VG's
... I don't believe its neccessary to pvremove the individual disks.

then drop the target LUN on the storage server.

-- 
john r pierce                                      37N 122W
somewhere on the middle of the left coast