Add GPU passthrough, fan control, and bay mapping scripts

- scripts/build-bay-map.sh: maps physical drive bays to /dev/disk/by-id paths - scripts/gpu-passthrough-setup.sh: configures IOMMU + vfio-pci for two Quadro P2200s - scripts/fan-control.sh: ipmitool daemon to prevent iDRAC from running fans at 100% due to non-Dell PCIe cards; adjusts speed by inlet temperature - scripts/fan-control.service: systemd unit for fan-control.sh https://claude.ai/code/session_01TxTSnxDjgEVuNztdsWQjMD
2026-04-24 01:00:26 +00:00
parent 017181c50a
commit ff0711b927
4 changed files with 327 additions and 0 deletions
@@ -0,0 +1,123 @@
+#!/usr/bin/env bash
+# Dell R730xd fan speed control for third-party PCIe cards (Quadro P2200, etc.)
+#
+# iDRAC detects non-Dell GPUs and slams fans to 100% indefinitely.
+# This script disables iDRAC automatic fan control and manages speed based
+# on inlet temperature, keeping the server quiet under normal load.
+#
+# Install:
+#   apt install ipmitool
+#   cp fan-control.sh /usr/local/sbin/fan-control.sh
+#   chmod +x /usr/local/sbin/fan-control.sh
+#   cp fan-control.service /etc/systemd/system/
+#   systemctl daemon-reload && systemctl enable --now fan-control.service
+#
+# Manual speed test (without running as daemon):
+#   fan-control.sh --set 25     # set fans to 25% and exit
+#   fan-control.sh --auto       # restore iDRAC automatic control and exit
+
+set -euo pipefail
+
+IPMI="ipmitool raw 0x30 0x30"
+
+# Fan speed thresholds by inlet temperature (°C → % speed)
+# Tune these for your environment. Inlet temp sensor reads ambient air entering front.
+declare -A SPEED_MAP=(
+  [0]=15    # < 30°C  → 15% (near-silent)
+  [30]=20   # 30–39°C → 20%
+  [40]=30   # 40–44°C → 30%
+  [45]=40   # 45–49°C → 40%
+  [50]=55   # 50–54°C → 55%
+  [55]=75   # 55–59°C → 75%
+  [60]=100  # ≥ 60°C  → 100% (safety)
+)
+
+# Minimum speed floor — never go below this (protects drives and CPUs)
+MIN_SPEED=15
+
+get_inlet_temp() {
+  ipmitool sdr type Temperature 2>/dev/null \
+    | grep -i "Inlet Temp\|Ambient\|Inlet" \
+    | grep -oP '\d+(?= degrees)' \
+    | head -1 || echo "35"  # safe default if sensor read fails
+}
+
+pct_to_hex() {
+  printf '0x%02x' "$(( $1 < 100 ? $1 : 100 ))"
+}
+
+set_fan_speed() {
+  local pct=$1
+  [[ $pct -lt $MIN_SPEED ]] && pct=$MIN_SPEED
+  local hex
+  hex=$(pct_to_hex "$pct")
+  $IPMI 0x02 0xff "$hex"
+}
+
+disable_auto_fan() {
+  $IPMI 0x01 0x00
+  echo "$(date): iDRAC automatic fan control DISABLED"
+}
+
+enable_auto_fan() {
+  $IPMI 0x01 0x01
+  echo "$(date): iDRAC automatic fan control RE-ENABLED"
+}
+
+speed_for_temp() {
+  local temp=$1
+  local speed=$MIN_SPEED
+  for threshold in $(echo "${!SPEED_MAP[@]}" | tr ' ' '\n' | sort -n); do
+    [[ $temp -ge $threshold ]] && speed=${SPEED_MAP[$threshold]}
+  done
+  echo "$speed"
+}
+
+# ── Argument handling ─────────────────────────────────────────────────────────
+
+case "${1:-}" in
+  --auto)
+    enable_auto_fan
+    exit 0
+    ;;
+  --set)
+    pct="${2:?Usage: fan-control.sh --set <0-100>}"
+    disable_auto_fan
+    set_fan_speed "$pct"
+    echo "$(date): Fans set to ${pct}%"
+    exit 0
+    ;;
+  --temp)
+    echo "Inlet temp: $(get_inlet_temp)°C"
+    exit 0
+    ;;
+  "")
+    # Daemon mode — fall through to loop
+    ;;
+  *)
+    echo "Usage: $0 [--auto | --set <pct> | --temp]"
+    exit 1
+    ;;
+esac
+
+# ── Daemon loop ───────────────────────────────────────────────────────────────
+
+trap 'enable_auto_fan; exit 0' SIGTERM SIGINT
+
+echo "$(date): Fan control daemon starting"
+disable_auto_fan
+
+last_speed=-1
+
+while true; do
+  temp=$(get_inlet_temp)
+  target=$(speed_for_temp "$temp")
+
+  if [[ $target -ne $last_speed ]]; then
+    set_fan_speed "$target"
+    echo "$(date): Inlet ${temp}°C → fans ${target}%"
+    last_speed=$target
+  fi
+
+  sleep 30
+done