#!/bin/sh
# This script can be used to sync disk usage before activating quotas on GlusterFS.
# There are two scenarios where quotas are used and this script has to be used accordingly -
#
# 1. Server side
# The script needs to be run with backend export directory as the argument. This script updates
# the current disk usage of the backend directory in a way that is intelligible to the GlusterFS quota
# translator. Make sure you run this script before starting glusterfsd (GlusterFS server process):
# * for the first time
# * after any server outage (reboot, etc.)
# 2. Client side
# The script needs to be run with the client mount point as the argument. It updates the current disk
# of the GlusterFS volume is a way that is intelligible to the GlusterFS quota translator. Make sure
# you run this script after a fresh mount of the GlusterFS volume on the client:
# * For the first time
# * After any client outage (reboot, remount, etc.)
# Please note that this script is dependent on the 'attr' package, more specifically 'setfattr' to set
# extended attributes of files.
# GlusterFS
#
# (c) 2010 Gluster Inc
PROGRAM_NAME="disk_usage_sync.sh"
#check if setfattr is available
check_for_attr ()
{
`command -v setfattr >/dev/null`
if [ "${?}" -gt 0 ]; then
echo >&2 "This script requires the 'attr' package to run. Either it has not been installed or is not present currently in the system path."
exit 1
fi
}
usage () {
echo >&2 "$PROGRAM_NAME - Command used to sync disk usage information before activating quotas on GlusterFS.
usage: $PROGRAM_NAME "
exit 1
}
TARGET_DIR=$1
EXT_ATTR_NAME="trusted.glusterfs-quota-du"
#output of du in number of bytes
get_disk_usage ()
{
if [ ! -d $TARGET_DIR ]; then
echo >&2 "Error: $TARGET_DIR does not exist."
exit 1
fi
DISK_USAGE=`du -bc $TARGET_DIR | grep 'total' | cut -f1`
if [ "${?}" -gt 0 ]; then
exit 1
fi
}
#set the extended attribute of the root directory with du size in bytes
set_disk_usage ()
{
` setfattr -n $EXT_ATTR_NAME -v $DISK_USAGE $TARGET_DIR`
if [ "${?}" -gt 0 ]; then
exit 1
fi
}
main ()
{
[ $# -lt 1 ] && usage
check_for_attr
get_disk_usage
set_disk_usage
printf "Disk Usage information has been sync'd successfully.\n"
}
main "$@"
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