cassandra_node_status_summary

#!/usr/bin/env bash
#
#
#

cassandra_log_file=/var/log/cassandra/system.log
cassandra_output_file=/var/log/cassandra/output.log

export thisCommand=`basename $0`

trace_cmd () {
	cmd="$1"; shift
	echo "$cmd" "$@"
	"$cmd" "$@"
}

RunningStatusText=`sudo service cassandra status 2>/dev/null | grep -v 'xss' | sed -e 's/ \* //'`
echo $RunningStatusText
if [ x"$RunningStatusText" == x"Cassandra is running" ]; then isRunning=true; else isRunning=false; fi

#
# Memory Check
#
memory_total_physical=`memory_total_physical`
if [ x$memory_total_physical == x ]; then
	echo Error: memory_total_physical failed; exit 1
fi

memory_recommended=32000000000
if [ `echo "$memory_total_physical < $memory_recommended" | bc` != 0 ]; then
	printf "Warning: Memory size: %'d too small. Should be: %'d\n" $memory_total_physical $memory_recommended
else
	printf "OK: Memory size: %'d\n" $memory_total_physical
fi

#
# Path Check
#
which nodetool status &>/dev/null
if [ $? -ne 0 ] ; then echo Error: Cassandra nodetool not in PATH; exit 1; else echo OK: Cassandra commands in PATH; fi


#
# Service Check
#
nodetool status >/dev/null 2>&1
status=$?
if [ $status != 0 ]; then echo Error: Cassandra server not responding; else echo OK: Cassandra server responding; fi

#
# Check memory
# 
echo Heap:
sudo grep "Heap size" "$cassandra_log_file" | tail -n 1 
echo Heap Warnings:
sudo grep "Heap is[0-9. ]*full" "$cassandra_log_file" | tail -n 10 

if [ $isRunning == false ]; then
	echo Exit:
	sudo grep "Service exit" "$cassandra_output_file" | tail -n 1 
fi