mrcharles
e27e3a06b8
Deployed manually on tsys-librenms 2026-09-02 (founder relay ruling); codified same-day rule. snmpget -t2 -r1 so a dark PDU answers in ~2s. Deployed target: tsys-librenms:/usr/local/bin/garage-pdu-relay. Detail: https://projects.knownelement.com/issues/733
31 lines
1.3 KiB
Bash
Executable File
31 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
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# garage-pdu-relay: expose APC AP7830 metered output current via snmpd extend.
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#
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# Relay pattern (founder ruling 2026-09-02): the garage PDU speaks SNMPv1
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# only, walks die on its old AOS, and its ACL admits the LibreNMS VM vantage.
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# This relay runs ON tsys-librenms; HA polls the relay via the fleet snmpd
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# extend (same rails as drac-extend). Output: "output_amps <x.y>".
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#
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# Deploy target: tsys-librenms:/usr/local/bin/garage-pdu-relay ONLY (relay
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# host — not a per-host agent). snmpd.conf line on the relay host:
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# extend garagepdu /usr/local/bin/garage-pdu-relay
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# snmpd ACL must admit the pfv-bms LAN + Tailscale IPs as query sources
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# (rocommunity kn3lmgmt 192.168.3.12 / 100.67.108.125 as of 2026-09-03).
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#
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# Codified 2026-09-03 [#733]: was deployed manually 2026-09-02; hardened
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# with explicit snmpget timeout/retry so a dark PDU answers in ~2s instead
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# of ~6s and cannot pile up long-running children under HA's poll cadence.
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set -euo pipefail
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PDU_HOST="${PDU_HOST:-pfv-garage-pdu-1.knel.net}"
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COMMUNITY="${PDU_COMMUNITY:-kn3lmgmt}"
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OID=".1.3.6.1.4.1.318.1.1.12.2.3.1.1.2.1"
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raw=$(snmpget -v1 -c "$COMMUNITY" -t 2 -r 1 -On -Ov "$PDU_HOST" "$OID" 2>/dev/null \
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| grep -oE '[0-9]+$') || true
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if [ -z "${raw:-}" ]; then
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echo "output_amps unavailable"
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exit 0
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fi
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awk -v t="$raw" 'BEGIN { printf "output_amps %.1f\n", t/10 }'
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