Script for Exporting and Importing VG's

[Richard Pugh_2]

Hello,
I was wondering if anyone out there has a script for creating a VGImport and Export script. I have some preliminary work done already but I cannot get some of it to work. So, if you have any information for me it would greatly be appreciated.

Thanks in advance,
CoMteC17

[Patrick Wallek]

If you could show us the script you have now and tell us what isn't working we may be able to help you fix it.

[Donny Jekels]

you find what you are looking for in this list.


http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xf0fc5dc05a7ad711abdc0090277a778c,00.html

http://www.shellderado.com

[Geoff Wild · Accepted solution]

How about:

for i in `ls -d /dev/vg*`
do
vgexport -s -p -v -m /tmp/$i.map $i
done

Then to import, mkdir all the /dev/vg's
and
mknod /dev/vgXX/group c 64 0xXX000

for i in `ls /tmp/*.map | awk -F. '{print $1}' | awk -F/ '{print $3}'`
do
vgimport -s -v -m /tmp/$i.map /dev/$i
done


Rgds...Geoff

[John Meissner]

I wrote two scripts for this the other day...

here is the export script:



#! /usr/bin/ksh
# this script written by John Meissner 4.14.2003
# This script will automatically do a vgexport for a server and generate map files
BOLD="`tput smso`"
NORMAL="`tput rmso`"
if [ `id|cut -c5-11` != "0(root)" ]
then
echo "Quitting - You must run this script as Root"
exit 1
fi

SGP=$(cmviewcl | grep `hostname` | grep enabled | awk '{print $1}') #checks for SG package name
# the following section will check for the service gard package status and halt the package
mcsg=1
while [ "$mcsg" = "1" ]
do
SGPS=$(cmviewcl | grep `hostname | grep enabled | awk '{print $2}') #checks the SG package status
if [ "$SGPS" = up ]
then
echo "Service Gard package $SGP is $SGPS - stopping package now"
cmhaltpkg $SGP
elif [ "$SGPS" = "down" ] || [ $? != 0 ]
then
echo "Service Gard package $SGP is $SGPS - continuing "
mcsg=0
elif [ "$SGPS" = "starting" ] || [ "$SGPS" = "halting" ]
then
echo " Service Gard package $SGP is $SGPS - sleeping 10 "
sleep 10
fi
done

#this section will find the VG names for the server and export the VG's to map files
dev_vg=$(ll /dev/vg*/group | grep -v vg00 | awk '{print $10}' | sed 's/\/group//g' | sed 's/\/dev\///g')
for i in $dev_vg
do
vgexport -p -s -m $dev_vg.map /dev/$dev_vg
done

#find the failover server and ftp the map files
SGF=$(cmviewcl -v -p $SGP | grep Alternate | awk '{print $4}')
ftp -n -i <open $SGF
user username password
cd /tmp
ascii
mput /tmp/*.map
quit
HERE

[John Meissner]

and here is the vgimport script:


#! /usr/bin/ksh
# written by John Meissner on 4.14.03
# this script will automatically import vg map files created from other servers

# this entire process will deal only with the VG's that have new map files for them
# the map files will have already been ftp'd from the primary SG server to the /tmp directory

# get a list of the minor numbers and get them ready
vgmap_files=$(ls /tmp/*.map | sed 's/\/tmp\///g'| sed 's/\.map//g')
for i in $vgmap_files
do
ll /dev/vg*/group | grep $i | awk '{print $6,$10}' >> /tmp/minornum.list
newvg=$(ll /dev/vg*/group | grep $i)
if [ "$newvg" = "" ]
then
function get_next_volume_group_minor_number {
typeset -Z2 NEXTMINORNUM=0
let MINORNUM=0
ls -l /dev/*/group | awk '{print $6}' | cut -c 3-4 | {
while read MINORNUM
do
if ((NEXTMINORNUM < MINORNUM));
then
let NEXTMINORNUM=MINORNUM
fi
done
}
let NEXTMINORNUM=NEXTMINORNUM+1
print "0x0"$NEXTMINORNUM"0000 $i" >> /tmp/minornum.list
}

fi
done

# export the old VG's
oldvg-$(cat /tmp/minornum.list | awk '{print $2}' | awk -F/ '{print $3}')
for i in $oldvg
do
vgexport $i
done
fi
#now vgimport the new vg maps
vgdir=$(cat /tmp/minornum.list | awk '{print $2}' | awk -F/ '{print $3}')
for i in $vgdir
do
mkdir /dev/$i
done

#mknod
cat /tmp/minornum.list | awk '{print "mknod " $2 " c 64 " $1}' > /tmp/makenod.sh
chmod +x /tmp/makenod.sh
/tmp/makenod.sh

#vgimport
cat minornum.list | awk '{print "vgimport -s -m " $2 ".map /dev/" $2}' > /tmp/vgimpt.sh
chmod +x /tmp/vgimpt.sh
/tmp/vgimpt.sh

echo " you may now try to start the SG package "

[Richard Pugh_2]

Thanks John,
There was one command that did the trick for me. I will post the script when I have completely tested it.

I do have one question, how do force the export of the VG? What I mean is, after I run the vgexport -v -m /mapfile -s /dev/vg , I strings the /etc/lvmtab and the vg is still there.

Is there anything special I must do?

[Richard Pugh_2]

Nevermind....I answered my own question. I must umount the filesystems and do a vgchange -a n /dev/vg.

Thanks again for all the responses.

[John Meissner]

Richard... i went back through my script and fount two lines you will need to comment out before it works.

comment out the following two lines:

function get_next_volume_group_minor_number {
}

(the last } bracket in the function for get_next_volume_group_minor_number will also need to be commented out.)

after you do that it should work perfectly. sorry for not catching this sooner

[John Meissner]

to completely remove the vg you just do
vgexport
without any options this should remove the vg from you system and the lvmtab - but it sounds like you got that already