Add logical volume to VG in cluster

[Weertman]

When I add a logical volume to a vg in a package do I need to do the export and import?
It is a raw volume so no mkfs is needed.

[Sharma Sanjeev]

Hi

Yes, u need to export and import it on another node with new map file

Rergards
Sanjeev

[Avinash20]

Yes, it is required.

The device file /dev//* needs to be available on the other node also

Hence you need to do a vgexport -p on one node and on the other node, vgexport, mkdir,mknod, vgimport..

Please assign points

[Weertman]

when you omit that can that cause volume corruption in case of fail-over?

[yulianto piyut]

absolutely, YES! you must vgexport and vgimport to the other node and you must edit your control file (*.cntl) in your cluster configuration and add your new LV, for ex:

LV[0]=/dev/vgbea/lvbea; FS[0]=/apps/bea; FS_MOUNT_OPT[0]="-o rw"; FS_UMOUNT_OPT[
0]=""; FS_FSCK_OPT[0]="";FS_TYPE[0]="vxfs"

[Avinash20]

"when you omit that can that cause volume corruption in case of fail-over?"

Yes, that why we are doing vgexport in preview mode on one server and doing a vgimport on the other node

vgimport wont work if the vg is already there in lvmtab, hence we need to export and import it again ..

[Weertman]

what is the correct import command?

[Johnson Punniyalingam]

Example:-

On the other node:
1. Export the VG
>>>vgexport /dev/vgxx

2. Recreate the directory
>>>>mkdir -p /dev/vgxx

3. Recreate the VG group file
>>>mknod /dev/vgxx/group c 64 0xMM0000
where MM is a unique identifier (ex 01 for vg01)

4. Preview the vgimport to check for any possible error
>>>>vgimport -pvs -m /dev/vgxx
where mapfile is the one copied from the first node

5. If no error, remove the preview mode
>>>>vgimport -vs -m /dev/vgxx

6. Activate in share mode
>>>>vgchange -a s /dev/vgxx

Thanks,
Johnson

[Weertman]

vgchange -a s /dev/vg02
vgchange: Volume group "/dev/vg02" does not exist in the "/etc/lvmtab" file.

[Johnson Punniyalingam]

>>vgchange -a s /dev/vg02
vgchange: Volume group "/dev/vg02" does not exist in the "/etc/lvmtab" file.<<

what is vgname did you import on the other node..?

Thanks,
Johnson