Automatisches Ein- und Ausschalten einer Tape-Library für Bacula-Backups

#!/bin/bash
#
# This script powers up the tapelibrary and adds a line to a semphore file
# 2018-02-12 Sebastian Suchanek
 
SEMAPHORE='/etc/tapelibrary_semaphore'
TURN_ON_CMD='/usr/local/bin/all3075_switch_on'
TURN_OFF_CMD='/usr/local/bin/all3075_switch_off'
GET_SWITCH_STATUS_CMD='/usr/local/bin/get_status_all3075'
RESET_FC_CMD='sudo /usr/local/bin/reset_fc_hba'
LIBRARY_DEVICE='/dev/sg4'
LIBRARY_ID_STRING='mediumx'
 
# Print usage help
print_usage()
{
	echo "Usage: request_tapelibrary <token>"
	echo ""
	echo "<token> is a string which will be used in the semaphore file."
        echo "        It must be unique for ever concurrent backup job."
	echo ""
}
 
# Do a reboot via a power cycle
reboot_library()
{
 	eval "$TURN_OFF_CMD"
	sleep 10s
	eval "$TURN_ON_CMD"
	for i in `seq 1 180`; do
        	echo -n "+"
        	sleep 1s
        done
}
 
# Check if token was passed
if [ $# -eq 0 ]; then
	print_usage
	exit 1
fi
 
# Check if semaphore file exists and create otherwise
if ! [ -f $SEMAPHORE ]; then
	echo "Semaphore file not found, creating $SEMAPHORE"
	touch $SEMAPHORE
	chmod 664 $SEMAPHORE
else
	echo "Semaphore file $SEMAPHORE found."
fi
 
# Get status of power switch and turn on library if is not running already
SWITCH_STATUS=`$GET_SWITCH_STATUS_CMD`
if [ "$SWITCH_STATUS" -eq 0 ]; then
	echo "Tapelibrary is powered off, turning on."
	eval "$TURN_ON_CMD"
else
	echo "Tapelibrary is already powered on."
	# Add line to semaphore file
	CUR_TIME=`date +"%F %T"`
	echo "$CUR_TIME - $1" >> $SEMAPHORE
	exit 0
fi
 
# Add line to semaphore file
CUR_TIME=`date +"%F %T"`
echo "$CUR_TIME - $1" >> $SEMAPHORE
 
# Wait grace period to allow initialisation of library
echo -n "Waiting grace period to allow initialisation "
for i in `seq 1 180`; do
	echo -n "."
	sleep 1s
done
echo ""
 
# Check, if library is properly initialised and initialise otherwise
echo "Checking availability of tapelibrary."
LIB_STATUS=`lsscsi | grep -c $LIBRARY_ID_STRING`
if [ "$LIB_STATUS" -eq 0 ]; then
	echo "Tapelibrary is not initialised yet."
    i=1
	echo -n "Reseting Fibre Channel link "
	while [ `lsscsi | grep -c $LIBRARY_ID_STRING` -eq 0 ]; do
		if [ $((i % 6)) -eq 0 ]; then
			echo "Tapelibrary seems to have a problem. Doing a cold reset."
			reboot_library
                else
			eval "$RESET_FC_CMD"
			sleep 5s
			echo -n "."
		fi
                let "i++"
	done
	echo ""
else
	echo "Tapelibrary is accessible."
fi
 
# Library was just powered on, so check readiness and eject cartridges
if [ "$SWITCH_STATUS" -eq 0 ]; then
 
	mtx -f $LIBRARY_DEVICE status > /dev/null 2>&1
        STATUS=$?
	if [ $STATUS != 0 ]; then
		echo -n "Tapelibrary seems to be still initialising. Waiting "
		until [ $STATUS -eq 0 ]
		do
			sleep 5
			mtx -f $LIBRARY_DEVICE status > /dev/null 2>&1
			STATUS=$?
			echo -n "."
		done
		echo " "
	fi
 
	DRIVESTATE=`mtx -f $LIBRARY_DEVICE status | grep "Data Transfer Element 0" | grep -c Full`
	if [ $DRIVESTATE -eq 1 ]; then
		echo "A Cartridge is still in LTO-1 drive. Ejecting..."
 
bconsole <<END_OF_COMMANDS
release storage=LTO1-Drive
 
 
quit
END_OF_COMMANDS
 
        fi
 
        DRIVESTATE=`mtx -f $LIBRARY_DEVICE status | grep "Data Transfer Element 1" | grep -c Full`
        if [ $DRIVESTATE -eq 1 ]; then
                echo "A Cartridge is still in LTO-4 drive. Ejecting..."
 
bconsole <<END_OF_COMMANDS
release storage=LTO4-Drive
 
 
quit
END_OF_COMMANDS
 
        fi
fi
 
echo "Tapelibrary is now ready for operation."

#!/bin/sh
echo 1 > /sys/class/fc_host/host0/issue_lip
echo 1 > /sys/class/fc_host/host7/issue_lip
echo "- - -" > /sys/class/scsi_host/host0/scan
echo "- - -" > /sys/class/scsi_host/host7/scan

#!/bin/sh
#!/bin/bash
#
# This script checks if all concurrent jobs on the tapelibrary are finished
# and powers down the library if yes.
# 2018-02-12 Sebastian Suchanek
 
SEMAPHORE='/etc/tapelibrary_semaphore'
TURN_OFF_CMD='/usr/local/bin/all3075_switch_off'
GET_SWITCH_STATUS_CMD='/usr/local/bin/get_status_all3075'
 
# Print usage help
print_usage()
{
	echo "Usage: release_tapelibrary <token>"
	echo ""
	echo "<token> is a string which will be used in the semaphore file."
        echo "        It must be unique for ever concurrent backup job."
	echo ""
}
 
 
# Check if token was passed
if [ $# -eq 0 ]; then
	print_usage
	exit 1
fi
 
# Check if semaphore file exists and exit otherwise
if ! [ -f $SEMAPHORE ]; then
	echo "Semaphore file not found, quitting"
	exit 1
else
	echo "Semaphore file $SEMAPHORE found."
fi
 
# Check if token is included in semaphore file
COUNT_TOKEN=`grep -c "$1" $SEMAPHORE`
if [ "$COUNT_TOKEN" -gt 1 ]; then
	echo "Token found more then once in semaphore file. Something's wrong, quitting."
	exit 1
fi
if [ "$COUNT_TOKEN" -eq 0 ]; then
        echo "Token not found in semaphore file. Something's wrong, quitting."
        exit 1
fi
 
# Token is valid. Remove from semaphore file
TFILE=`mktemp -t libsemtemp.XXXXX`
sed "/$1/d" $SEMAPHORE > "$TFILE"
cat "$TFILE" > $SEMAPHORE
rm $TFILE
 
# Check if semaphore file is empty, i.e. no jobs are left
if ! [ -s $SEMAPHORE ]; then
        echo "No jobs left to process. Tapelibrary will be powered down soon."
else
	COUNT_JOBS=`wc -l < $SEMAPHORE`
	echo "Still $COUNT_JOBS job(s) left to process. Leaving tapelibrary powered on."
fi

Job {
  Name = "B_TigersclawServer"
  Client = tigersclaw-fd
  Type = Backup
  Storage = LTO4-Drive
  FileSet = "Tigersclaw Server"
  Schedule = "WeeklyCycle"
  Pool = File
  Full Backup Pool = LTO41
  Differential Backup Pool = LTO40
  Incremental Backup Pool = LTO40
  RunBeforeJob = "/usr/local/bin/request_tapelibrary.sh TigersclawServer"
  RunScript {
    Command  = "/usr/local/bin/release_tapelibrary.sh TigersclawServer"
    RunsWhen = After
    RunsOnFailure = yes
    RunsOnClient = no
    RunsOnSuccess = yes
  }
  Messages = Standard
  Priority = 10
  Write Bootstrap = "/var/lib/bacula/%c_%n.bsr"
  Maximum Concurrent Jobs = 2
}

#!/bin/bash
#
# This script checks if the semaphore file is empty and powers down
# the tapelibrary after a given amount of repeats.
# 2018-03-12
 
MAXCOUNT=3
 
SEMAPHORE='/etc/tapelibrary_semaphore'
COUNTF='/etc/tapelibrary_count'
TURN_OFF_CMD='/usr/local/bin/all3075_switch_off'
GET_SWITCH_STATUS_CMD='/usr/local/bin/get_status_all3075'
LIBRARY_DEVICE='/dev/sg4'
 
# Get status of tapelibrary
SWITCH_STATUS=`$GET_SWITCH_STATUS_CMD`
if [ "$SWITCH_STATUS" -eq 0 ]; then
#        echo "Tapelibrary is currently powered down."
        exit 0
fi
 
# Check if semaphore file exists and is not empty
if [ -f $SEMAPHORE ] && [ -s $SEMAPHORE ]; then
#	echo "Semaphore file exists and is not empty. Quitting."
	echo "1" > $COUNTF # As a precautionary measure, reset counting file
	exit 0
#else
#	echo "Semaphore file either doesn't exist or is empty."
fi
 
# Check if counting file exists. If so, read counting value and if not, create it.
if [ ! -f $COUNTF ]; then
	echo "1" > $COUNTF
        CURCOUNT=1
else
	CURCOUNT=`cat $COUNTF`
fi
 
#echo "$CURCOUNT. read of status."
 
# Check if tapes are left in drives and eject them if necessary
if [ "$CURCOUNT" -gt "$MAXCOUNT" ]; then
	echo "Maximum re-checks of $MAXCOUNT reached."
 
        DRIVESTATE=`mtx -f $LIBRARY_DEVICE status | grep "Data Transfer Element 0" | grep -c Full`
        if [ "$DRIVESTATE" -eq 1 ]; then
                echo "A Cartridge is still in LTO-1 drive. Ejecting..."
 
bconsole <<END_OF_COMMANDS
release storage=LTO1-Drive
 
 
quit
END_OF_COMMANDS
 
        fi
 
        DRIVESTATE=`mtx -f $LIBRARY_DEVICE status | grep "Data Transfer Element 1" | grep -c Full`
        if [ "$DRIVESTATE" -eq 1 ]; then
                echo "A Cartridge is still in LTO-4 drive. Ejecting..."
 
bconsole <<END_OF_COMMANDS
release storage=LTO4-Drive
 
 
quit
END_OF_COMMANDS
 
        fi
 
	echo -n "Waiting grace period to allow tapelibrary to settle down "
	for i in `seq 1 10`; do
        	echo -n "."
        	sleep 1s
	done
	echo ""
 
	echo "Powering down tapelibrary now."
        echo "1" > $COUNTF
	eval "$TURN_OFF_CMD"
else
	CURCOUNT=$((CURCOUNT+1))
#	echo "Increasing count to $CURCOUNT"
        echo $CURCOUNT > $COUNTF
fi