#!/bin/bash
# garage-pdu-relay: expose APC AP7830 metered output current via snmpd extend.
#
# Relay pattern (founder ruling 2026-09-02): the garage PDU speaks SNMPv1
# only, walks die on its old AOS, and its ACL admits the LibreNMS VM vantage.
# This relay runs ON tsys-librenms; HA polls the relay via the fleet snmpd
# extend (same rails as drac-extend). Output: "output_amps <x.y>".
set -euo pipefail

PDU_HOST="${PDU_HOST:-pfv-garage-pdu-1.knel.net}"
COMMUNITY="${PDU_COMMUNITY:-kn3lmgmt}"
OID=".1.3.6.1.4.1.318.1.1.12.2.3.1.1.2.1"

raw=$(snmpget -v1 -c "$COMMUNITY" -On -Ov "$PDU_HOST" "$OID" 2>/dev/null \
    | grep -oE '[0-9]+$') || true
if [ -z "${raw:-}" ]; then
    echo "output_amps unavailable"
    exit 0
fi
awk -v t="$raw" 'BEGIN { printf "output_amps %.1f\n", t/10 }'