mirror of
https://github.com/ergosteur/ergo-proxmox-scripts.git
synced 2026-10-28 13:00:37 -04:00
ergosteurandClaude Opus 5
3a1973b3a4
It was the only script in the repository tracked as 100644. Every other one is 100755, and it has been executable on the Proxmox host all along, so this never showed up while deploying by scp, which carries the mode across. It would have broken the first deployment made by cloning instead: ipmi-fancontrol.service runs it as ExecStart, and a fresh checkout would have produced a non-executable file and a permission denied at start, leaving the fans on whatever duty the BMC last had. Found while converting /opt/ergosteur to a git checkout, where it showed up as the one tracked file differing from the host. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
123 lines
4.3 KiB
Bash
Executable File
123 lines
4.3 KiB
Bash
Executable File
#!/bin/bash
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# Temperature-aware IPMI fan control for Dell PowerEdge / iDRAC.
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#
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# Holds the fans at a fixed low duty while the CPUs are cool, and hands control
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# back to the BMC's automatic curve once they get hot, so there is still a
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# thermal response under load. This is the native equivalent of the
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# tigerblue77/dell_idrac_fan_controller container, without needing Docker.
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#
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# Run under ipmi-fancontrol.service. Configuration lives in
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# conf/ipmi-fancontrol.conf (see conf/ipmi-fancontrol.conf.example).
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set -uo pipefail
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SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
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CONFIG=${IPMI_FANCONTROL_CONFIG:-$SCRIPT_DIR/conf/ipmi-fancontrol.conf}
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if [[ ! -r "$CONFIG" ]]; then
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echo "Error: cannot read $CONFIG" >&2
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echo "Copy conf/ipmi-fancontrol.conf.example there and fill it in." >&2
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exit 1
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fi
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# shellcheck source=/dev/null
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. "$CONFIG"
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: "${IPMI_INTERFACE:=open}"
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: "${FAN_SPEED:=0x15}"
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: "${CPU_TEMP_THRESHOLD:=70}"
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: "${CPU_TEMP_HYSTERESIS:=5}"
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: "${CHECK_INTERVAL:=60}"
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: "${DISABLE_THIRD_PARTY_PCIE_COOLING_RESPONSE:=false}"
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RESUME_AT=$((CPU_TEMP_THRESHOLD - CPU_TEMP_HYSTERESIS))
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# Build the ipmitool invocation once. The local "open" interface needs no
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# credentials and no network, so it is the better choice for a polling loop;
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# lanplus stays available for reaching a BMC over the network.
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if [[ "$IPMI_INTERFACE" == "lanplus" ]]; then
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: "${IPMI_HOST:?not set in $CONFIG}"
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: "${IPMI_USER:?not set in $CONFIG}"
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: "${IPMI_PASSWORD:?not set in $CONFIG}"
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export IPMI_PASSWORD
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IPMITOOL=(ipmitool -I lanplus -H "$IPMI_HOST" -U "$IPMI_USER" -E)
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else
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IPMITOOL=(ipmitool -I open)
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fi
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# stdout goes to the journal under systemd.
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log() { echo "$*"; }
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set_manual() {
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"${IPMITOOL[@]}" raw 0x30 0x30 0x01 0x00 >/dev/null &&
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"${IPMITOOL[@]}" raw 0x30 0x30 0x02 0xff "$FAN_SPEED" >/dev/null
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}
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set_auto() {
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"${IPMITOOL[@]}" raw 0x30 0x30 0x01 0x01 >/dev/null
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}
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# Highest CPU temperature in degrees C, or empty if none could be read.
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# CPU sensors are entity 3.x; 7.x is the system board (inlet/exhaust).
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max_cpu_temp() {
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"${IPMITOOL[@]}" sdr type temperature 2>/dev/null | awk -F'|' '
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$4 ~ /^[[:space:]]*3\./ {
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if (match($5, /-?[0-9]+/)) {
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t = substr($5, RSTART, RLENGTH) + 0
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if (!seen || t > max) max = t
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seen = 1
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}
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}
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END { if (seen) print max }
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'
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}
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MODE=""
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cleanup() {
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log "Stopping: returning fan control to the BMC automatic curve."
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set_auto || log "Warning: failed to restore automatic fan control."
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exit 0
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}
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trap cleanup TERM INT
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if [[ "$DISABLE_THIRD_PARTY_PCIE_COOLING_RESPONSE" == "true" ]]; then
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if "${IPMITOOL[@]}" raw 0x30 0xce 0x00 0x16 0x05 0x00 0x00 0x00 0x05 0x00 0x01 0x00 0x00 >/dev/null 2>&1; then
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log "Disabled the third-party PCIe card default cooling response."
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else
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log "Warning: could not disable the third-party PCIe cooling response."
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fi
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fi
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log "Starting: fans held at $FAN_SPEED below ${CPU_TEMP_THRESHOLD}C, automatic at or above it, re-engaging at ${RESUME_AT}C. Polling every ${CHECK_INTERVAL}s over $IPMI_INTERFACE."
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while true; do
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temp=$(max_cpu_temp)
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if [[ -z "$temp" ]]; then
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# Fail safe: if the temperature cannot be read, let the BMC cool the box.
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if [[ "$MODE" != "auto" ]]; then
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log "Cannot read CPU temperature; failing safe to automatic fan control."
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set_auto && MODE="auto"
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fi
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elif (( temp >= CPU_TEMP_THRESHOLD )); then
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if [[ "$MODE" != "auto" ]]; then
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log "CPU at ${temp}C, at or above ${CPU_TEMP_THRESHOLD}C: handing control to the BMC automatic curve."
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set_auto && MODE="auto"
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fi
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elif [[ -z "$MODE" ]] || (( temp <= RESUME_AT )); then
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# The -z test makes the very first pass decide rather than drift, even
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# if we start up inside the hysteresis band.
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if [[ "$MODE" != "manual" ]]; then
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log "CPU at ${temp}C, at or below ${RESUME_AT}C: holding fans at $FAN_SPEED."
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set_manual && MODE="manual"
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fi
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fi
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# Inside the hysteresis band we deliberately keep whatever mode we are in.
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# Backgrounded so that SIGTERM interrupts the wait instead of being deferred
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# until the sleep finishes.
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sleep "$CHECK_INTERVAL" &
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wait $!
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done
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