Veritas Volume Manager -4

                                                            VXVM-4 (Dg)

What we will learn in Next Few Pages,

·         Disabling Disk Group

·         Destroy / Recover Disk Groups

·         Disk Group Configuration backup / restore (incomplete)

DISABLING Dg,

Just deport it, it will disable

DESTROY-RECOVER Dg,

root@pr-01:>/# vxdisk list

DEVICE       TYPE            DISK         GROUP        STATUS

c1t0d0s2     auto:none       -            -            online invalid

c2t2d0s2     auto:sliced     test-disk2   test-dg1     online

c2t3d0s2     auto:sliced     test-disk3   testdg2      online

c2t4d0s2     auto:sliced     test-disk4   testdg2      online

c2t5d0s2     auto:sliced     -            -            online

root@pr-01:>/# vxdg destroy testdg2

root@pr-01:>/# vxdisk list

DEVICE       TYPE            DISK         GROUP        STATUS

c1t0d0s2     auto:none       -            -            online invalid

c2t2d0s2     auto:sliced     test-disk2   test-dg1     online

c2t3d0s2     auto:sliced     -            -            online

c2t4d0s2     auto:sliced     -            -            online

c2t5d0s2     auto:sliced     -            -            online

For recovery at least we should know the disks used in that Dg, and the disks should intact.

We have to find out the dgid from the disks [ any disk used in that Dg]

root@pr-01:>/# vxdisk -s list c2t3d0s2 |grep -i dgid

dgid:   1411456168.28.pr-01

root@pr-01:>/# vxdisk -s list c2t4d0s2 |grep -i dgid

dgid:   1411456168.28.pr-01

root@pr-01:>/# vxdg import 1411456168.28.pr-01

root@pr-01:>/# vxdg list

NAME         STATE           ID

test-dg1     enabled              1411453154.22.pr-01

testdg2      enabled              1411456168.28.pr-01

Look… we got our Dg back… but the disks should be intact

Dg CONFIG BACKUP / RESTORE

Vxconfigbackupd daemon monitors the changes to vxvm config and automatically records that change

Vxconfigbackup & vxconfigrestore

Vxnotify is to monitor the changes related to disks & configuration managed by vxcongigd daemon

Let’s see the magic of vxnotify

In one terminal I’m running

#vxnotify

And in other terminal I will do some changes, Let’s see what happen…

root@pr-01:>/# vxnotify                    [term 2]

connected

root@pr-01:>/# vxdg deport testdg2        [term 1]

root@pr-01:>/# vxnotify                   [term 2]

connected

change disk c2t3d0s2 dm - dg - dgid -

change disk c2t4d0s2 dm - dg - dgid -

deport dg testdg2 dgid 1411456168.28.pr-01

root@pr-01:>/# vxdg import testdg2         [term 1]

root@pr-01:>/# vxnotify                    [term 2]

connected

change disk c2t3d0s2 dm - dg - dgid -

change disk c2t4d0s2 dm - dg - dgid -

deport dg testdg2 dgid 1411456168.28.pr-01

change disk c2t3d0s2 dm test-disk3 dg testdg2 dgid 1411456168.28.pr-01

change disk c2t4d0s2 dm test-disk4 dg testdg2 dgid 1411456168.28.pr-01

import dg testdg2 dgid=1411456168.28.pr-01

dgname change dgid 1411456168.28.pr-01 new testdg2 old testdg2

ok… we can use this utility while performing some task, to verify the results

auto config backup are located at,

/etc/vx/cbr/bk

root@pr-01:>/# cd /etc/vx/cbr/bk

root@pr-01:>/etc/vx/cbr/bk# ls -l

total 2

drwxr-xr-x   2 root     root         512 Sep 23 12:50 test-dg1.1411453154.22.pr-01

root@pr-01:>/# vxconfigbackup

VxVM vxconfigbackup ERROR V-5-2-3694 Configuration Copy for diskgroup test-dg1 has not changed since last backup (Tue Sep 23 12:49:16 IST 2014).  Backup is not necessary.

VxVM vxconfigbackup NOTICE V-5-2-6133 Start backing up diskgroup testdg2 to /etc/vx/cbr/bk/testdg2.1411456168.28.pr-01 ...

VxVM  NOTICE V-5-2-3100 Backup complete for diskgroup: testdg2

=========

It is telling about test-dg1 that, its config has not changed so no need to take bkp

And bkp for testdg2 is processed and completed.

root@pr-01:>/# cd /etc/vx/cbr/bk

root@pr-01:>/etc/vx/cbr/bk# ls -l

total 4

drwxr-xr-x   2 root     root         512 Sep 23 12:50 test-dg1.1411453154.22.pr-01

drwxr-xr-x   2 root     root         512 Sep 23 16:09 testdg2.1411456168.28.pr-01

Now I want to take the bkp at specific location…

root@pr-01:>/etc/vx/cbr/bk# vxconfigbackup -l /var/tmp

VxVM vxconfigbackup NOTICE V-5-2-6133 Start backing up diskgroup test-dg1 to /var/tmp/test-dg1.1411453154.22.pr-01 ...

VxVM  NOTICE V-5-2-3100 Backup complete for diskgroup: test-dg1

VxVM vxconfigbackup NOTICE V-5-2-6133 Start backing up diskgroup testdg2 to /var/tmp/testdg2.1411456168.28.pr-01 ...

VxVM  NOTICE V-5-2-3100 Backup complete for diskgroup: testdg2

root@pr-01:>/# ls -l /var/tmp

drwxr-xr-x   2 root     root         512 Sep 23 16:13 test-dg1.1411453154.22.pr-01

drwxr-xr-x   2 root     root         512 Sep 23 16:14 testdg2.1411456168.28.pr-01

root@pr-01:>/# vxconfigrestore -p testdg2

VxVM vxconfigrestore ERROR V-5-2-3705 Diskgroup testdg2 is currently online imported.

root@pr-01:>/# vxdg deport testdg2

root@pr-01:>/# vxconfigrestore -p testdg2

Diskgroup testdg2 configuration restoration started ......

VxVM vxconfigrestore ERROR V-5-2-3703 Diskgroup testdg2 appears to be a deported disk group.

root@pr-01:>/# vxconfigrestore testdg2

Diskgroup testdg2 configuration restoration started ......

VxVM vxconfigrestore ERROR V-5-2-3703 Diskgroup testdg2 appears to be a deported disk group.

root@pr-01:>/# vxdg import testdg2

root@pr-01:>/# vxconfigrestore testdg2

VxVM vxconfigrestore ERROR V-5-2-3705 Diskgroup testdg2 is currently online imported.

( I need to check on this & will Update soon )