Volume group in MC/SG

[aaaA_4]

Hello,

I have a simple question. Do I have to halt the cluster when I am adding the new volume group (volume_group) to the cluster? Is it possible to add volume group to the cluster (make it cluster aware) while the cluster is running?

Thanks,
BZ

[Sunil Sharma_1 · Accepted solution]

Hi,

No need to halt the cluster, you can do it while cluster is active.

Sunil

[G. Vrijhoeven]

Hi,

Sure just use:

pvcreate -f /dev/rdsk/...&& vgcreate vgname /dev/dsk/.... && lvcreate -L size /dev/vgname & vgchange -c y /dev/vgname

You can add the volume group to the cluster ascii file so it will be activated cluster awaire if the cluster software is started.
to apply the ascii file use chcheckconf -v -C /etc/cmcluster/*.ascii and cmapplyconf -v -C /etc/cmcluster/*.ascii

This all can be done online.

Gideon

[aaaA_4]

Thank you...
BZ

[Stephen Doud]

1) Add a new line to the cluster ASCII file for future cmapplyconf.

2) Create the new VG

3) Make it cluster-aware:
$ vgchange -c y
NOTE: this can only be done on a node where cmlvmd is active (node UP in cluster)

4) Add the VG and it's LVOL references to the package control script

5) Copy the package control script to adoptive nodes

6) Activate the VG on the node where it's package is UP
$ vgchange -a e

7) Mount the new VG's LVOLs to file systems

8) Test package halt/failover

-StephenDoud