ServiceGuard: access to the files

[Sergejs Svitnevs]

Hi,

I need to stop the ServiceGuard package and change some files in the share VG.

Can I use this procedure?

1) cmhaltpkg
2) vgchange -c n # Release control of cluster
3) vgchange -a e # Activate volume group in exclusive mode
4) mount the required file system on the volume group, work with the files, umount filesystem
5) vgchange -a n # Deactivate volume group
6) vgchange -c y # Enable volume group for HA cluster
7) vgchange -a s # Activate volume group in shared mode
8) cmrunpkg
9) cmmodpkg -e

Thanks,
Sergejs

[Steve Lewis]

You do not need to vgchange -c n, just halt the package with cmhaltpkg, then manually activate using vgchange -a e, then mount whichever filesystem you need, make the change, unmount the FS, vgchange -a n, re-start the package.

This is true even if you are changing the volume group configuration.

The easier method for is simply to halt the software that runs in your MC/SG package and make the file changes in situ while the MC/SG package is still up. Then, when the package is switched over the change will appear on the other node anyway because its on the shared storage.

Steve

[Sanjay_6]

Hi Sergejs,

You do not have to vgchange -c n. If the cluster is still running on the node, you can activate the vg in exclusive mode manually and mount the filesystem, do your changes, deactivate the vg and restart the package,

1) cmhaltpkg
2) vgchange -a e # Activate volume group in exclusive mode
3) mount the required file system on the volume group, work with the files, umount filesystem
4) vgchange -a n # Deactivate volume group
5) cmmodpkg -e # if you want to start the package on the priamry node itself.

cmmodpkg -e would automatically restart the down package on the primary node.

Hope this helps.

Regds

[Geoff Wild]

vgchange -c n only required if mounting on a server that doesn't have MC/SG installed (IE a backup server).

The rest is fine.

Now, question is, what files do you have to modify and why can't you modify with the package up?

Rgds...Geoff