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Dell_iDRAC_fan_controller.sh
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Dell_iDRAC_fan_controller.sh
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#!/bin/bash
# Enable strict bash mode to stop the script if an uninitialized variable is used, if a command fails, or if a command with a pipe fails
# Not working in some setups : https://github.com/tigerblue77/Dell_iDRAC_fan_controller/issues/48
# set -euo pipefail
source functions.sh
# Trap the signals for container exit and run graceful_exit function
trap 'graceful_exit' SIGINT SIGQUIT SIGTERM
# Prepare, format and define initial variables
# readonly DELL_FRESH_AIR_COMPLIANCE=45
# Check if FAN_SPEED variable is in hexadecimal format. If not, convert it to hexadecimal
if [[ $FAN_SPEED == 0x* ]]; then
readonly DECIMAL_FAN_SPEED=$(printf '%d' $FAN_SPEED)
readonly HEXADECIMAL_FAN_SPEED=$FAN_SPEED
else
readonly DECIMAL_FAN_SPEED=$FAN_SPEED
readonly HEXADECIMAL_FAN_SPEED=$(convert_decimal_value_to_hexadecimal $FAN_SPEED)
fi
# Check if the iDRAC host is set to 'local' or not then set the IDRAC_LOGIN_STRING accordingly
if [[ $IDRAC_HOST == "local" ]]; then
# Check that the Docker host IPMI device (the iDRAC) has been exposed to the Docker container
if [ ! -e "/dev/ipmi0" ] && [ ! -e "/dev/ipmi/0" ] && [ ! -e "/dev/ipmidev/0" ]; then
echo "/!\ Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0, check that you added the device to your Docker container or stop using local mode. Exiting." >&2
exit 1
fi
IDRAC_LOGIN_STRING='open'
else
echo "iDRAC/IPMI username: $IDRAC_USERNAME"
echo "iDRAC/IPMI password: $IDRAC_PASSWORD"
IDRAC_LOGIN_STRING="lanplus -H $IDRAC_HOST -U $IDRAC_USERNAME -P $IDRAC_PASSWORD"
fi
get_Dell_server_model
if [[ ! $SERVER_MANUFACTURER == "DELL" ]]; then
echo "/!\ Your server isn't a Dell product. Exiting." >&2
exit 1
fi
# If server model is Gen 14 (*40) or newer
if [[ $SERVER_MODEL =~ .*[RT][[:space:]]?[0-9][4-9]0.* ]]; then
DELL_POWEREDGE_GEN_14_OR_NEWER=true
CPU1_TEMPERATURE_INDEX=2
CPU2_TEMPERATURE_INDEX=4
else
DELL_POWEREDGE_GEN_14_OR_NEWER=false
CPU1_TEMPERATURE_INDEX=1
CPU2_TEMPERATURE_INDEX=2
fi
# Log main informations
echo "Server model: $SERVER_MANUFACTURER $SERVER_MODEL"
echo "iDRAC/IPMI host: $IDRAC_HOST"
# Log the fan speed objective, CPU temperature threshold and check interval
echo "Fan speed objective: $DECIMAL_FAN_SPEED%"
echo "CPU temperature threshold: $CPU_TEMPERATURE_THRESHOLD°C"
echo "Check interval: ${CHECK_INTERVAL}s"
echo ""
# Define the interval for printing
readonly TABLE_HEADER_PRINT_INTERVAL=10
i=$TABLE_HEADER_PRINT_INTERVAL
# Set the flag used to check if the active fan control profile has changed
IS_DELL_FAN_CONTROL_PROFILE_APPLIED=true
# Check present sensors
IS_EXHAUST_TEMPERATURE_SENSOR_PRESENT=true
IS_CPU2_TEMPERATURE_SENSOR_PRESENT=true
retrieve_temperatures $IS_EXHAUST_TEMPERATURE_SENSOR_PRESENT $IS_CPU2_TEMPERATURE_SENSOR_PRESENT
if [ -z "$EXHAUST_TEMPERATURE" ]; then
echo "No exhaust temperature sensor detected."
IS_EXHAUST_TEMPERATURE_SENSOR_PRESENT=false
fi
if [ -z "$CPU2_TEMPERATURE" ]; then
echo "No CPU2 temperature sensor detected."
IS_CPU2_TEMPERATURE_SENSOR_PRESENT=false
fi
# Output new line to beautify output if one of the previous conditions have echoed
if ! $IS_EXHAUST_TEMPERATURE_SENSOR_PRESENT || ! $IS_CPU2_TEMPERATURE_SENSOR_PRESENT; then
echo ""
fi
# Start monitoring
while true; do
# Sleep for the specified interval before taking another reading
sleep $CHECK_INTERVAL &
SLEEP_PROCESS_PID=$!
retrieve_temperatures $IS_EXHAUST_TEMPERATURE_SENSOR_PRESENT $IS_CPU2_TEMPERATURE_SENSOR_PRESENT
# Initialize a variable to store the comments displayed when the fan control profile changed
COMMENT=" -"
# Check if CPU 1 is overheating then apply Dell default dynamic fan control profile if true
if CPU1_OVERHEAT; then
apply_Dell_fan_control_profile
if ! $IS_DELL_FAN_CONTROL_PROFILE_APPLIED; then
IS_DELL_FAN_CONTROL_PROFILE_APPLIED=true
# If CPU 2 temperature sensor is present, check if it is overheating too.
# Do not apply Dell default dynamic fan control profile as it has already been applied before
if $IS_CPU2_TEMPERATURE_SENSOR_PRESENT && CPU2_OVERHEAT; then
COMMENT="CPU 1 and CPU 2 temperatures are too high, Dell default dynamic fan control profile applied for safety"
else
COMMENT="CPU 1 temperature is too high, Dell default dynamic fan control profile applied for safety"
fi
fi
# If CPU 2 temperature sensor is present, check if it is overheating then apply Dell default dynamic fan control profile if true
elif $IS_CPU2_TEMPERATURE_SENSOR_PRESENT && CPU2_OVERHEAT; then
apply_Dell_fan_control_profile
if ! $IS_DELL_FAN_CONTROL_PROFILE_APPLIED; then
IS_DELL_FAN_CONTROL_PROFILE_APPLIED=true
COMMENT="CPU 2 temperature is too high, Dell default dynamic fan control profile applied for safety"
fi
else
apply_user_fan_control_profile
# Check if user fan control profile is applied then apply it if not
if $IS_DELL_FAN_CONTROL_PROFILE_APPLIED; then
IS_DELL_FAN_CONTROL_PROFILE_APPLIED=false
COMMENT="CPU temperature decreased and is now OK (<= $CPU_TEMPERATURE_THRESHOLD°C), user's fan control profile applied."
fi
fi
# If server model is Gen 14 (*40) or newer
if ! $DELL_POWEREDGE_GEN_14_OR_NEWER; then
# Enable or disable, depending on the user's choice, third-party PCIe card Dell default cooling response
# No comment will be displayed on the change of this parameter since it is not related to the temperature of any device (CPU, GPU, etc...) but only to the settings made by the user when launching this Docker container
if $DISABLE_THIRD_PARTY_PCIE_CARD_DELL_DEFAULT_COOLING_RESPONSE; then
disable_third_party_PCIe_card_Dell_default_cooling_response
THIRD_PARTY_PCIE_CARD_DELL_DEFAULT_COOLING_RESPONSE_STATUS="Disabled"
else
enable_third_party_PCIe_card_Dell_default_cooling_response
THIRD_PARTY_PCIE_CARD_DELL_DEFAULT_COOLING_RESPONSE_STATUS="Enabled"
fi
fi
# Print temperatures, active fan control profile and comment if any change happened during last time interval
if [ $i -eq $TABLE_HEADER_PRINT_INTERVAL ]; then
echo " ------- Temperatures -------"
echo " Date & time Inlet CPU 1 CPU 2 Exhaust Active fan speed profile Third-party PCIe card Dell default cooling response Comment"
i=0
fi
printf "%19s %3d°C %3d°C %3s°C %5s°C %40s %51s %s\n" "$(date +"%d-%m-%Y %T")" $INLET_TEMPERATURE $CPU1_TEMPERATURE "$CPU2_TEMPERATURE" "$EXHAUST_TEMPERATURE" "$CURRENT_FAN_CONTROL_PROFILE" "$THIRD_PARTY_PCIE_CARD_DELL_DEFAULT_COOLING_RESPONSE_STATUS" "$COMMENT"
((i++))
wait $SLEEP_PROCESS_PID
done