30 lines
1.0 KiB
Bash
30 lines
1.0 KiB
Bash
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#!/usr/bin/env bash
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set -o errexit
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set -o nounset
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set -o pipefail
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threshold="${1:-80}"
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if [[ ! "$threshold" =~ ^[0-9]+$ ]] || (( threshold < 1 || threshold > 100 )); then
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printf 'CRITICAL: invalid threshold "%s"; provide an integer from 1 to 100\n' "$threshold" >&2
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exit 2
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fi
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status=0
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warning_threshold=$(( threshold > 5 ? threshold - 5 : threshold ))
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while read -r filesystem size used avail use_percent mountpoint; do
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usage="${use_percent%\%}"
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if (( usage >= threshold )); then
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printf 'CRITICAL: %s mounted on %s is %s used; threshold is %s%% (%s free)\n' "$filesystem" "$mountpoint" "$use_percent" "$threshold" "$avail"
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status=1
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elif (( usage >= warning_threshold )); then
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printf 'WARNING: %s mounted on %s is %s used; threshold is %s%%\n' "$filesystem" "$mountpoint" "$use_percent" "$threshold"
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else
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printf 'OK: %s mounted on %s is %s used\n' "$filesystem" "$mountpoint" "$use_percent"
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fi
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done < <(df -P -x tmpfs -x devtmpfs | awk 'NR > 1 {print $1, $2, $3, $4, $5, $6}')
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exit "$status"
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