adding the node clean up script; provided by HPE, modified by me

clean-node.sh

+#!/bin/bash
+
+shopt -s extglob
+
+
+RET=0
+AVOIDUIDS="messagebus|nobody|nscd|ntp|postfix|root|USER|dbus|nslcd|polkitd|rpc|rpcuser|munge|nvidia-persistenced|chrony|pbsdata|statd"
+
+# Print usage banner
+function usage ()
+{
+    echo "Usage: $0 [OPTION]"
+    echo "    -p       run prologue modules"
+    echo "    -e       run epilogue modules"
+    echo "    -c       run cleaning modules"
+}
+
+
+###############################################################################
+# Clean up functions
+###############################################################################
+function clean_tmp ()
+{
+    logger "Cleaning /tmp"
+    find /tmp ! -user root -exec rm -rf {} \; &> /dev/null
+}
+
+function clean_shared_mem ()
+{
+    logger "Cleaning shared memory"
+    # Clean semaphores
+    for i in `ipcs -s | grep -v root | grep -v pbsdata | awk '{print $2}' | grep ^[0-9]`
+    do
+	ipcrm -s $i &> /dev/null
+    done
+    
+    # Clean shared mem
+    for i in `ipcs -m | grep -v root | grep -v pbsdata | awk '{print $2}' | grep ^[0-9]`
+    do
+	ipcrm -m $i &> /dev/null
+    done
+}
+
+function clean_user_procs ()
+{
+    logger "Cleaning stray processes" -semaphores
+    for i in `ps --no-headers -eo euser | egrep -v "${AVOIDUIDS}" | sort | uniq`
+    do
+	logger "Killing $i processes..."
+	pkill -9 -u $i &>/dev/null
+    done
+}
+	
+function clean_dev_shm ()
+{
+    cwd=$PWD
+    cd /dev/shm
+    rm  -rf -v !("lldpad.state") &>/dev/null
+    cd $cwd
+}
+
+function clean_memory_cache ()
+{
+    logger "Flushing caches"
+
+#	sync; echo 1 > /proc/sys/vm/drop_caches
+#	sync; echo 2 > /proc/sys/vm/drop_caches
+    sync; echo 3 > /proc/sys/vm/drop_caches
+}
+
+function print_job_start ()
+{
+    logger -t PBSJOBSTART_$1 "PBS Job $1 started by $2"
+}
+
+function print_job_end ()
+{
+    logger -t PBSJOBEND_$1 "PBS Job $1 completed by $2"
+}
+
+
+
+###############################################################################
+# Main Script
+###############################################################################
+
+# Verify and process cmd line options
+if [ $# -lt 1 ]
+then
+    usage
+    exit 1
+fi
+
+case $1 in
+    -p)
+
+	logger -t PROLOGUE_CLEANUP_START_$2 "Starting prologue cleanup"
+
+	# Add the user to the list of user procs to avoid
+	AVOIDUIDS+="|$3"
+
+	clean_tmp
+	clean_shared_mem
+	clean_user_procs 
+	clean_dev_shm
+	clean_memory_cache
+
+	logger -t PROLOGUE_CLEANUP_END_$2 "Completed prologue cleanup"
+	print_job_start "$2" "$3"
+	;;
+    -e)
+	
+	logger -t EPILOGUE_CLEANUP_START_$2 "Starting epilogue cleanup"
+
+	print_job_end "$2" "$3"
+	clean_tmp
+	clean_shared_mem
+	clean_user_procs
+	clean_dev_shm
+	clean_memory_cache
+	logger -t EPILOGUE_CLEANUP_END_$2 "Completed epilogue cleanup"
+	;;
+    -c)
+	echo "Running epilogue modules..."
+	clean_tmp
+	clean_shared_mem
+	clean_user_procs
+	clean_dev_shm
+	clean_memory_cache
+	logger -t EPILOGUE_CLEANUP_END "The epilogue cleanup has completed"
+	;;
+    *)
+	usage
+	RET=1
+	;;
+esac
+
+exit $RET