add idrac-fan-control skill: IPMI fan speed control via Proxmox
This commit is contained in:
Viktor Barzin
parent
452c3c8c7f
commit
68e7cde5c3
1 changed files with 149 additions and 0 deletions
149
dot_claude/skills/idrac-fan-control/SKILL.md
Normal file
149
dot_claude/skills/idrac-fan-control/SKILL.md
Normal file
|
|
@ -0,0 +1,149 @@
|
|||
---
|
||||
name: idrac-fan-control
|
||||
description: |
|
||||
Control Dell server fan speed via iDRAC IPMI commands. Use when:
|
||||
(1) User asks to change fan speed, reduce fan noise, or adjust cooling,
|
||||
(2) User asks about server temperatures or thermal status,
|
||||
(3) User mentions "idrac", "ipmi", "fan speed", "fan noise", or "server loud",
|
||||
(4) User wants to check or set manual fan control on the Dell R730.
|
||||
Covers IPMI raw commands for fan override, racadm access, and thermal monitoring.
|
||||
author: Claude Code
|
||||
version: 1.0.0
|
||||
date: 2026-03-17
|
||||
---
|
||||
|
||||
# iDRAC Fan Control
|
||||
|
||||
## Problem
|
||||
Dell servers run fans at high RPM by default, which can be excessively loud for home lab environments. Manual fan speed control requires IPMI raw commands that aren't well documented.
|
||||
|
||||
## Context / Trigger Conditions
|
||||
- Server fans running too loud (~7000+ RPM)
|
||||
- User wants quieter operation when thermal headroom exists
|
||||
- Need to check temperatures before/after fan speed changes
|
||||
- Dell PowerEdge server with iDRAC (tested on R730, service tag GCFSDN2)
|
||||
|
||||
## Prerequisites
|
||||
|
||||
### iDRAC Network Details
|
||||
- **iDRAC IP**: 192.168.1.4
|
||||
- **Credentials**: root / calvin
|
||||
- **Redfish API**: https://192.168.1.4/redfish/v1/
|
||||
|
||||
### IPMI over LAN Must Be Enabled
|
||||
IPMI over LAN is **disabled by default**. Enable it via racadm SSH:
|
||||
|
||||
```bash
|
||||
# From Proxmox (192.168.1.127) which has sshpass installed:
|
||||
ssh root@192.168.1.127 "sshpass -p calvin ssh -o StrictHostKeyChecking=no -o PubkeyAuthentication=no root@192.168.1.4 'racadm get iDRAC.IPMILan'"
|
||||
|
||||
# If Enable=Disabled, enable it:
|
||||
ssh root@192.168.1.127 "sshpass -p calvin ssh -o StrictHostKeyChecking=no -o PubkeyAuthentication=no root@192.168.1.4 'racadm set iDRAC.IPMILan.Enable Enabled'"
|
||||
```
|
||||
|
||||
### ipmitool Access
|
||||
ipmitool is installed on **Proxmox** (192.168.1.127). All commands below run from there:
|
||||
|
||||
```bash
|
||||
# Shorthand used in examples below:
|
||||
IPMI_CMD="ssh root@192.168.1.127 'ipmitool -I lanplus -H 192.168.1.4 -U root -P calvin'"
|
||||
```
|
||||
|
||||
## Solution
|
||||
|
||||
### Step 1: Check Current Temperatures and Fan Speeds
|
||||
|
||||
```bash
|
||||
# Read temperatures
|
||||
ssh root@192.168.1.127 "ipmitool -I lanplus -H 192.168.1.4 -U root -P calvin sdr type temperature"
|
||||
# Output: Inlet Temp, Exhaust Temp, CPU Temp with °C readings
|
||||
|
||||
# Read fan speeds
|
||||
ssh root@192.168.1.127 "ipmitool -I lanplus -H 192.168.1.4 -U root -P calvin sdr type fan"
|
||||
# Output: Fan1-Fan6 with RPM readings
|
||||
```
|
||||
|
||||
### Step 2: Set Manual Fan Speed
|
||||
|
||||
```bash
|
||||
# 1. Disable automatic fan control (switch to manual mode)
|
||||
ssh root@192.168.1.127 "ipmitool -I lanplus -H 192.168.1.4 -U root -P calvin raw 0x30 0x30 0x01 0x00"
|
||||
|
||||
# 2. Set fan speed percentage (0xff = all fans, last byte = hex percentage)
|
||||
# Common values: 0x0a=10%, 0x14=20%, 0x1e=30%, 0x28=40%, 0x32=50%, 0x64=100%
|
||||
ssh root@192.168.1.127 "ipmitool -I lanplus -H 192.168.1.4 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x14"
|
||||
```
|
||||
|
||||
### Step 3: Verify and Monitor
|
||||
|
||||
```bash
|
||||
# Check fan speeds dropped
|
||||
ssh root@192.168.1.127 "ipmitool -I lanplus -H 192.168.1.4 -U root -P calvin sdr type fan"
|
||||
|
||||
# Monitor temperatures to ensure they stay safe
|
||||
ssh root@192.168.1.127 "ipmitool -I lanplus -H 192.168.1.4 -U root -P calvin sdr type temperature"
|
||||
```
|
||||
|
||||
### Restore Automatic Fan Control
|
||||
|
||||
```bash
|
||||
# Re-enable automatic fan control (iDRAC manages fans again)
|
||||
ssh root@192.168.1.127 "ipmitool -I lanplus -H 192.168.1.4 -U root -P calvin raw 0x30 0x30 0x01 0x01"
|
||||
```
|
||||
|
||||
## Alternative: Redfish API (No ipmitool Needed)
|
||||
|
||||
Read-only thermal data is available via Redfish (works from any machine):
|
||||
|
||||
```bash
|
||||
# Get fan speeds and temperatures
|
||||
curl -sk -u root:calvin https://192.168.1.4/redfish/v1/Chassis/System.Embedded.1/Thermal | python3 -c "
|
||||
import sys,json
|
||||
d=json.loads(sys.stdin.read())
|
||||
for f in d.get('Fans',[]):
|
||||
print(f'{f[\"Name\"]} = {f[\"Reading\"]} RPM')
|
||||
for t in d.get('Temperatures',[]):
|
||||
print(f'{t[\"Name\"]} = {t[\"ReadingCelsius\"]}°C')
|
||||
"
|
||||
```
|
||||
|
||||
## Alternative: racadm via SSH to iDRAC
|
||||
|
||||
For other iDRAC settings, SSH directly via Proxmox:
|
||||
|
||||
```bash
|
||||
ssh root@192.168.1.127 "sshpass -p calvin ssh -o StrictHostKeyChecking=no -o PubkeyAuthentication=no root@192.168.1.4 'racadm <command>'"
|
||||
```
|
||||
|
||||
Useful racadm commands:
|
||||
- `racadm getsensorinfo` — all sensor readings
|
||||
- `racadm get iDRAC.IPMILan` — IPMI LAN configuration
|
||||
- `racadm get System.ThermalSettings` — thermal profile settings
|
||||
|
||||
## Verification
|
||||
- After setting fan speed, `sdr type fan` should show lower RPM values
|
||||
- Monitor `sdr type temperature` for 5-10 minutes — inlet should stay under 35°C, CPU under 80°C
|
||||
- If temperatures rise dangerously, immediately re-enable auto: `raw 0x30 0x30 0x01 0x01`
|
||||
|
||||
## Thermal Baseline (Normal Operation)
|
||||
| Sensor | Typical Value |
|
||||
|--------|---------------|
|
||||
| Inlet Temp | ~24°C |
|
||||
| Exhaust Temp | ~25-26°C |
|
||||
| CPU1 Temp | ~50°C |
|
||||
| Fan1-Fan6 (auto) | ~7080-7200 RPM |
|
||||
|
||||
## Safe Fan Speed Guidelines
|
||||
| Fan % | Good For | Max Inlet Temp |
|
||||
|-------|----------|----------------|
|
||||
| 10% | Idle, quiet room | < 25°C |
|
||||
| 20% | Normal workload | < 30°C |
|
||||
| 30% | Heavy workload | < 35°C |
|
||||
| 40%+ | GPU/summer | < 40°C |
|
||||
|
||||
## Notes
|
||||
- IPMI raw commands `0x30 0x30` are Dell-specific OEM commands — won't work on HP/Supermicro
|
||||
- Manual fan mode persists across iDRAC resets but NOT across full server power cycles
|
||||
- The Redfish API on this firmware (v1.4.0) does NOT support the Attributes endpoint — use IPMI for control
|
||||
- ipmitool must run from a host on the same network as iDRAC (192.168.1.x) — Proxmox is the relay
|
||||
- sshpass + ipmitool are installed on Proxmox (installed 2026-03-17)
|
||||
Loading…
Add table
Add a link
Reference in a new issue