6 Replies Latest reply: May 8, 2013 6:29 AM by mathanku RSS

KVM Backup  with Snapcreator

MARCEL.WERNER.BT Novice
Currently Being Moderated

Hello *,

 

our setup looks like so :

 

- one volume (/vol/01_test_sas/)

- 1-n qtrees in the volume (/vol/01_test_sas/vm1; /vol/01_test_sas/vm2)

- 1-n luns as virtual disk (/vol/01_test_sas/vm1/vm1-igroup.oslun; /vol/01_test_sas/vm1/vm1-igroup.datalun)

- 2 node RedhatCluster (Both nodes see the same):

  + multipath (/dev/mapper/vm1-igroup.oslun;/dev/mapper/vm1-igroup.datalun)

  + lvm (Physical Volume(PV) on netapp Lun / Volume Group(VG) on the PV / Logical Volume (LV) on the VG ->

     lvm (/dev/mapper/vm1_sda-sda;/dev/mapper/vm1_sdb-sdb)

  + Configure the Cluster to use CLVMD to switch beetween the nodes

- Use the LV's  as raw disk in the virtual Maschines

 

Now our Problems going on :

 

1.) We cant use KVM Plugin from Snapcreator , there only gives support for VM to MultiPatch Raw Devices

2.) It is possible that the vm is on node 1 or 2

 

 

Now my possible solution an questions.

 

1.) Installing snapdrive on the KVM Hosts

2.) Wrote a pre/post script with Task:

     2.1) Locate all Running VM's on the node

     2.2) Getting from xml File the the raw Disk's

     2.3) suspend the vm's running on the node

     2.4) Use snapdrive with -vg switch or do a snapshot without snapdrive

     2.5) resume the vm's

3.) Backup done

 

Questions :

The using of snadrive is it  an advantage over the direct snapshot ?

Do you see a simpler solution ?

Is it possible to sync the backup beetwen the  cluster nodes , so not 2 snapshots are needed on the same volume ?

 

Thanks a Lot , all posts are welcome.

 

rg

marcel

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