52 lines
1.4 KiB
Bash
Executable File
52 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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# Nagios plugin to check iowait on Linux
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if ! command -v iostat &>/dev/null; then
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echo "iostat not found! Please install sysstat:"
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echo "sudo apt install sysstat"
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exit 1
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fi
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# Define usage function
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function usage {
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echo "Usage: $0 [-w <warning threshold>] [-c <critical threshold>]"
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echo " -w: Warning threshold for iowait percentage (default: 50)"
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echo " -c: Critical threshold for iowait percentage (default: 75)"
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exit 3
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}
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# Parse command line arguments
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while getopts "w:c:" opt; do
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case $opt in
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w) WARNING_THRESHOLD=$OPTARG ;;
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c) CRITICAL_THRESHOLD=$OPTARG ;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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usage
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;;
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:)
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echo "Option -$OPTARG requires an argument." >&2
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usage
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;;
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esac
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done
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# Set default warning and critical thresholds if not provided
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WARNING_THRESHOLD=${WARNING_THRESHOLD:-50}
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CRITICAL_THRESHOLD=${CRITICAL_THRESHOLD:-75}
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IOWAIT=$(iostat -c | awk '/^ /{print $4}')
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if (($(echo "$IOWAIT > $CRITICAL_THRESHOLD" | bc -l))); then
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echo "CRITICAL - iowait percentage is $IOWAIT% | iowait=$IOWAIT%;$WARNING_THRESHOLD;$CRITICAL_THRESHOLD;0;100"
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exit 2
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fi
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if (($(echo "$IOWAIT > $WARNING_THRESHOLD" | bc -l))); then
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echo "WARNING - iowait percentage is $IOWAIT% | iowait=$IOWAIT%;$WARNING_THRESHOLD;$CRITICAL_THRESHOLD;0;100"
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exit 1
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fi
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echo "OK - iowait percentage is $IOWAIT% | iowait=$IOWAIT%;$WARNING_THRESHOLD;$CRITICAL_THRESHOLD;0;100"
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exit 0
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