39 lines
1.2 KiB
Bash
39 lines
1.2 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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LOG_FILE="/var/log/ailab-disk-watch.log"
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threshold="${AILAB_DISK_THRESHOLD:-85}"
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if ((EUID != 0)); then
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printf 'CRITICAL: this script must run as root to write %s\n' "$LOG_FILE" >&2
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exit 2
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fi
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if [[ ! "$threshold" =~ ^[0-9]+$ ]] || ((threshold < 1 || threshold > 100)); then
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printf 'CRITICAL: AILAB_DISK_THRESHOLD must be an integer from 1 to 100\n' >&2
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exit 2
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fi
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exec > >(tee -a "$LOG_FILE") 2>&1
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printf '\n[%s] Disk usage check; threshold=%s%%\n' "$(date --iso-8601=seconds)" "$threshold"
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status=0
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while read -r filesystem _blocks _used available use_percent mountpoint; do
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usage="${use_percent%\%}"
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if [[ ! "$usage" =~ ^[0-9]+$ ]]; then
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printf 'WARNING: unable to parse usage for %s mounted on %s\n' "$filesystem" "$mountpoint"
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status=1
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elif ((usage >= threshold)); then
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printf 'WARNING: %s mounted on %s is %s used; threshold=%s%%; available=%s KB\n' \
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"$filesystem" "$mountpoint" "$use_percent" "$threshold" "$available"
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status=1
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else
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printf 'OK: %s mounted on %s is %s used\n' "$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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