111 lines
3.1 KiB
Bash
111 lines
3.1 KiB
Bash
#!/bin/bash
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#
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#/
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#/ Usage:
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#/ check-memory.sh --warning=<level> --critical=<level> --help
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#/
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#/ Checks the memory usage
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#/
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#/ Options:
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#/ -w, --warning=<level> The level of when to trigger a warning (level=loadavg/nproc)
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#/ -c, --critical=<level> The level of when to trigger a critical warning (level=loadavg/nproc)
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#/ -h, --help Display this help message
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#/
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#/ Exit Codes:
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#/ 0 Everything OK
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#/ 1 Warning level exceeded
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#/ 2 Critical level exceeded
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#/ 3 Unknown status
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#/
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Usage() {
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grep '^#/' "${script_dir}/${script_name}" | sed 's/^#\/\w*//'
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}
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GetOptions() {
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# https://stackoverflow.com/a/29754866
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OPTIONS=w:c:h
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LONGOPTS=warning:,critical:,help
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# -use ! and PIPESTATUS to get exit code with errexit set
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# -temporarily store output to be able to check for errors
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# -activate quoting/enhanced mode (e.g. by writing out “--options”)
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# -pass arguments only via -- "$@" to separate them correctly
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! PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@")
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if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
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# e.g. return value is 1
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# then getopt has complained about wrong arguments to stdout
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Usage
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exit 2
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fi
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# read getopt's output this way to handle the quoting right:
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eval set -- "$PARSED"
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# now enjoy the options in order and nicely split until we see --
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while true; do
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case "$1" in
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-w|--warning)
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warn="$2"
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shift 2
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;;
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-c|--critital)
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crit="$2"
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shift 2
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;;
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-h|--help)
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Usage
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exit 0
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;;
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--)
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shift
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break
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;;
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*)
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echo "MEMORY UNKNOWN - ${1} is not a valid parameter"
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exit 3
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;;
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esac
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done
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}
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LC_NUMERIC="C"
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warn=0.7
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crit=0.9
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script_name=$(basename "${0}")
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script_dir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
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GetOptions "$@"
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totalfull=$(cat /proc/meminfo | grep MemTotal | awk '{ print $2; }')
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availfull=$(cat /proc/meminfo | grep MemAvailable | awk '{ print $2; }')
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usedfull=$(echo ${totalfull}-${availfull} | bc)
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val=$(echo "${usedfull}/${totalfull}" | bc -l)
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if (( $(echo "$val < ${warn}" | bc -l) )); then
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rval=0
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rmsg="OK"
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elif (( $(echo "$val < ${crit}" | bc -l) )); then
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rval=1
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rmsg="WARNING"
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else
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rval=2
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rmsg="CRITICAL"
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fi
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critfull=$(echo ${totalfull}\*${crit} | bc -l | awk '{ print int($1+0.5) }')
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warnfull=$(echo ${totalfull}\*${warn} | bc -l | awk '{ print int($1+0.5) }')
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minfull=0
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maxfull=${totalfull}
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unitfull="KiB"
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used100=$(printf %.1f $(echo ${val}\*100 | bc -l))
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crit100=$(printf %.1f $(echo ${crit}\*100 | bc -l))
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warn100=$(printf %.1f $(echo ${warn}\*100 | bc -l))
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min100=0
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max100=100
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unit100="%"
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echo "MEMORY ${rmsg} - Used: ${usedfull} Available: ${availfull} Total: ${totalfull}|mem=${usedfull}${unitfull};$warnfull;$critfull;$minfull;$maxfull mem%=${used100}${unit100};$warn100;$crit100;$min100;$max100"
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exit $rval
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