#!/bin/bash

OUT="/docker/monitoring/node_exporter/textfile_collector/smart_selftest.prom"

> "$OUT"

for dev in $(smartctl --scan-open | awk '{print $1}'); do
    name=$(basename "$dev")
    LAST=$(smartctl -l selftest "$dev" 2>/dev/null \
        | grep "Completed" \
        | head -1 \
        | awk '{print $(NF-1)}')

    # Skip devices without self-test history
    if [[ "${LAST}" == "-" ]]; then
        HOURS=$(smartctl -a "$DEV" 2>/dev/null | awk '/Power_On_Hours/ {print $10}')
        LAST=${HOURS:- -1} 
    fi
    echo $name: $LAST
    echo "smart_last_selftest_poweron_hours{device=\"$name\"} $LAST" >> "$OUT"

done