Listing 1 Snapshot.sh shell script
#!/bin/sh
#
# Script that will stop processes using their respective init scripts,
# snapshots filesystems, and restart processes. The snapshot directories
# are then backed up using backup program (Networker in my case). Make
# sure there are no ".nsr" files in the original mount points as they will
# be contained in the snapshots. The snapshots are read-only an cannot be
# modified.
#
# Make sure you modify the list of variables at the top of the script to your
# particular installation (otherwise it will most likely not work).
#
# To Use with Networker
# 1. Change the backup command in the client resource to savepnpc on the Networker
# server.
# 2. Create /nsr/res/groupname.res file where groupname is the groupname the client
# is started from. Make sure the groupname.res file redirects the output of
# this script to some file or pipe.
#
# Script located via anonymous ftp at ftp://CoE.syr.edu/pub/Solaris/scripts/snapshot.sh
#
# Change History
# Version 1.0 Initial creation to support backup of Oracle 8.0.5 database
# which is now unsupported by Oracle. Normal database backup
# tools (read SQL-backtrack) also do not support recoveries of
# unsupported Oracle databases. Vendor support only ufsdump
# to local tape with oracle shutdown which does give our customer
# much uptime for their system. With that said, I developed this
# script to assist our efforts.
# Christopher T. Beers - 7/12/2003 ctbeers@CoE.syr.edu
#
# Version 1.1 Updated to be more readable and portable. Instituted for loops,
# more variables, and some error checking.
# Have successfully used the script to stop Oracle 8.05 and 8.1.7
# as well as Endeavor Voyager and Computer Associates ServiceDesk
# Christopher T. Beers - 1/22/2003 ctbeers@CoE.syr.edu
#
# Version 1.1.1 Added -F ufs to mount commands in case mount could not figure
# this out. I was having problems with the first snapshot ever
# created on a system not getting mounted, but all other would.
# Maybe this will help.
# Christopher T. Beers - 2/4/2003 ctbeers@CoE.syr.edu
#
#-------------EDIT VARIABLES BELOW TO YOUR INSTALLATION-----------------------------
# Init scripts in the order they need to be executed on startup
INIT_SCRIPTS_STARTUP="oracle"
# Init scripts in the order they need to be executed on shutdown
INIT_SCRIPTS_SHUTDOWN="oracle"
# Application keywords passed to ps to check to see if processes are shutdown
# I use the usernames to processes are started with.
# Write the line as you would pass it to egrep (ie. using a OR symbol between the
# keywords)
PROCS_KEYWORDS="oracle|my_app"
# Mount points that need contain oracle data (files/tables, control files,
# redo file, archive log files, etc) and need to be snapshot
MOUNT_POINTS="/ora01 /ora02 /ora03 /ora04 /ora10 /ora11"
# Directory to store backing-store file to track block changes in the snapshot filesystems
SCRATCH_SPACE="/var/tmp"
# Extension to add to $MOUNT_POINT when mounting the read-only image with fssnap
MOUNT_POINT_EXT="snapshot"
# Backing-store file extension
BSTORE_EXT="bstore"
# Location of fssnap
FSSNAP="/usr/sbin/fssnap"
# Set if you wish to control the size of the backing-store file
# Read man page on fssnap_ufs but it suffices to say that maxsize=n[k,m,g] where n
# is a number
# Be aware that if this file fills up, your snapshot will be invalid as it can no
# longer track changes
# I choose not set it for this reason and the fact that my $SCRATCH_SPACE is 5 times
# the size of the DB.
BSTORE_MAXSIZE=""
# Set our PATH variable explicitly and export it to the script
PATH=/usr/sbin:/usr/bin:/usr/ucb
export PATH
#-----------------------NOTHING TO EDIT BELOW HERE------------------------
case $1 in
'start')
echo "Starting Snapshot process at `date`"
echo
for i in $INIT_SCRIPTS_SHUTDOWN
do
echo "Stopping $i"
if [ -x /etc/init.d/$i ]
then
/etc/init.d/$i stop
echo "Shutdown of $i Successful"
else
echo "/etc/init.d/$i is not there or is not executable"
echo "Shutdown of $i FAILED."
exit 2
fi
echo
done
if [ ! -d $SCRATCH_SPACE ]
then
echo "Creating $SCRATCH_SPACE because it does not exist"
mkdir -p $SCRATCH_SPACE
echo
fi
for i in $MOUNT_POINTS
do
if [ -f $SCRATCH_SPACE$i-$BSTORE_EXT ]
then
echo "$SCRATCH_SPACE$i-$BSTORE_EXT exists....deleting"
rm $SCRATCH_SPACE$i-$BSTORE_EXT
echo
elif [ ! -d $i$MOUNT_POINT_EXT ]
then
echo "Creating $i$MOUNT_POINT_EXT to use with $FSSNAP"
mkdir -p $i$MOUNT_POINT_EXT
echo
fi
done
echo "Processes should be OFF. Check ps output below"
ps -ef | egrep $PROCS_KEYWORDS
sleep 10
for i in $MOUNT_POINTS
do
echo "Using $FSSNAP to snapshot $i and mount to $i$MOUNT_POINT_EXT"
if [ $BSTORE_MAXSIZE ]
then
echo "Backingstore file limited to $BSTORE_MAXSIZE to track filesystem changes"
mount -F ufs -o ro `$FSSNAP -F ufs \
-o maxsize=$BSTORE_MAXSIZE,backing-store=$SCRATCH_SPACE$i-$BSTORE_EXT \
$i` $i$MOUNT_POINT_EXT
$FSSNAP -i $i
echo
else
mount -F ufs -o ro `$FSSNAP -F ufs -o \
backing-store=$SCRATCH_SPACE$i-$BSTORE_EXT $i` $i$MOUNT_POINT_EXT
$FSSNAP -i $i
echo
fi
done
echo "Printing Disk Usage information"
df -k
echo
for i in $INIT_SCRIPTS_STARTUP
do
echo "Starting $i"
/etc/init.d/$i start
echo
done
echo "Processes should be running. Check ps output below"
ps -ef | egrep $PROCS_KEYWORDS
echo
echo "Snapshot directories can now be backed up"
echo "Finished creating and mounting snapshots at `date`"
;;
'stop')
echo "Removing snapshot information and directories at `date`"
echo
for i in $MOUNT_POINTS
do
$FSSNAP -i $i
umount $i$MOUNT_POINT_EXT
echo
$FSSNAP -d $i
echo
if [ -f $SCRATCH_SPACE$i-$BSTORE_EXT ]
then
echo "Removing backing-store file $SCRATCH_SPACE$i-$BSTORE_EXT"
ls -la $SCRATCH_SPACE$i-$BSTORE_EXT
rm $SCRATCH_SPACE$i-$BSTORE_EXT
echo
fi
done
echo
echo "Cleanup complete. File System output should not contain snapshots"
echo
df -k
echo
echo "Finished at `date`"
;;
*)
echo "usage: $0 {start|stop}"
;;
esac
|
