new volume group in current cluster.

[Hrvoje Dubravica]

Hi,

I have up and running cluster, and I get new disks. I can see them from both nodes. So,
I created volume group, one lv and one fs on several disks. Question is: do I have to mark volume group with vgchange -c y vgname before importing those volume group on adoptiv node, or just import without vgchange. Other question is can I on line (without halting package) join this volume group in existing package.

Thank you in advance.

Hrvoje

[MARTINACHE]

Hi,

In order to use "-s" option of vgexport, you need to "vgchange -c y" your vg :

vgchange -c y /dev/vgXX
vgexport -p -s -m /tmp/mapfile.vgXX /dev/vgXX
rcp /tmp/mapfile.vgXX Host1 Host2

On node 2 :
mkdir /dev/vgXX
mknod /dev/vgXX/group c 64 0x...
vgimport -s -m /tmp/mapfile.vgXX /dev/vgXX

You need to stop your package if you want to add a new vg.

Regards,

Patrice

[Vincenzo Restuccia]

You need to stop your package for modify control.sh,etc.

[Pedro Sousa]

Hi Hrvoje!

Patrice, sorry, but I think you're wrong. There's no need of doing vgchange -c y before vgexport with -s option.

So Hrvoje, follow Patrice instructions, and don't forget to add an entry for that new vg in /etc/cmcluster/cmclconf.ascii, afterwards you'll need to apply the new conf. with cmapplyconf.

Note: you can add FileSystems online, but if you do it with VGs it can be a new point of failure on your HA cluster. So, add VGs offline.
good luck.

[James R. Ferguson]

Hi:

Document #UXSGLVKBAN00000012 (LVM - Adding A Volume Group To A ServiceGuard Package) has a step-by-step guide for this process.

It notes that it is not necessary to halt the package when adding a volume group. It also notes that a 'vgchange -c y ...' can be used to manually "cluster" an inactive volume group, but this will only succeed when the cluster is running, as it depends on the cmlvmd daemon being active.

...JRF...

[Hrvoje Dubravica]

Thank you,

James could you tell me where can I
found Document #UXSGLVKBAN00000012 (LVM - Adding A Volume Group To A ServiceGuard Package). It would help.

Best regards,

Hrvoje

[melvyn burnard]

the document is available on the ITRC web site under maintenance and support.
You need to go there and search for it.

[James R. Ferguson]

Hi Hrvoje:

To find the document I cited, follow this:

Make sure that you are logged into the ITRC.

Click Maintenance and Support -> Search Technical Knowledge Base -> Select Search by Doc ID and enter the document number (UXSGLVKBAN00000012) -> Search.

Regards!

...JRF...

[Hrvoje Dubravica]

unfortunatlly, it seems that I dont have
permission to get this document:
Note: Your search produced no results; try a different search string.

Hints: Document ids are case sensitive. You may not be authorized to access a particular document id.

Anyway, thank you