63 lines
1.5 KiB
Bash
Executable File
63 lines
1.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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WARNING_THRESHOLD=10
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CRITICAL_THRESHOLD=20
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# Parse command line arguments
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while getopts "w:c:" opt; do
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case $opt in
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w)
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WARNING_THRESHOLD="$OPTARG"
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;;
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c)
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CRITICAL_THRESHOLD="$OPTARG"
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;;
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\?)
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echo "Usage: check_iowait.sh [-w warning_threshold] [-c critical_threshold]"
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exit 1
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;;
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esac
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done
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if ! command -v iostat &>/dev/null; then
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echo "UNKNOWN - iostat not found! Please install sysstat"
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exit -1
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fi
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if ! command -v iotop &>/dev/null; then
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echo "UNKNWON - iotop not found! Please install iotop"
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exit -1
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fi
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# Get iowait value
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iowait=$(iostat -c | awk 'NR==4 {print $4}')
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# Get process list header and top 3 processes causing iowait
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header=$(iotop -b -n 1 -P -k -o | head -n 1)
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top_processes=$(iotop -b -n 1 -P -k -o | tail -n +4 | head -n 3)
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# Check if there are no processes causing iowait
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if [ -z "$top_processes" ]; then
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top_processes="No processes causing significant iowait."
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else
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top_processes="$header"$'\n'"$top_processes"
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fi
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iowait_str="- iowait: $iowait%"$'\n'"Top 3 processes causing iowait:"
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perfdata="iowait=$iowait%;$WARNING_THRESHOLD;$CRITICAL_THRESHOLD;0;100"
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# Check if iowait is above thresholds
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if (( $(echo "$iowait > $CRITICAL_THRESHOLD" | bc -l) )); then
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echo "CRITICAL $iowait_str"
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echo "$top_processes | $perfdata"
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exit 2
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elif (( $(echo "$iowait > $WARNING_THRESHOLD" | bc -l) )); then
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echo "WARNING $iowait_str"
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echo "$top_processes | $perfdata"
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exit 1
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else
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echo -e "OK $iowait_str"
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echo "$top_processes | $perfdata"
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exit 0
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fi
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