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hardcoded prometheus-textfile exporter

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do
2020-05-24 20:11:17 +02:00
parent e344809374
commit 610e1b514f
1 changed files with 25 additions and 15 deletions
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40
hardware/raspberrypi/fan/files/fan_ctrl.py
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@@ -3,18 +3,22 @@
import RPi.GPIO as GPIO
from datetime import date
from os import path
from os import getenv
import time
import sys
# Configuration
FAN_PIN = getenv("RPI_FAN_PIN", 21) # BCM pin used to drive transistor's base
WAIT_TIME = getenv("RPI_FAN_WAITTIME", 5) # [s] Time to wait between each refresh
FAN_MIN = getenv("RPI_FAN_MIN", 70) # [%] Fan minimum speed.
PWM_FREQ = getenv("RPI_FAN_PWMFREQ", 25000) # [Hz] Change this value if fan has strange behavior
FAN_PIN = getenv('RPI_FAN_PIN', 21) # BCM pin used to drive transistor's base
WAIT_TIME = getenv('RPI_FAN_WAITTIME', 5) # [s] Time to wait between each refresh
FAN_MIN = getenv('RPI_FAN_MIN', 70) # [%] Fan minimum speed.
PWM_FREQ = getenv('RPI_FAN_PWMFREQ', 25000) # [Hz] Change this value if fan has strange behavior
# Fan speed will change only of the difference of temperature is higher than hysteresis
hyst = getenv("RPI_FAN_HYST", 5)
debug = bool(getenv("RPI_FAN_DEBUG", "False"))
hyst = getenv('RPI_FAN_HYST', 1)
debug = bool(getenv('RPI_FAN_DEBUG', 'False'))
prom_collect_dir = getenv('RPI_PROM_COLLECTDIR','/tmp/textfile-collector')
prom_collect_file = prom_collect_dir + '/rpi_fan.prom'
# Configurable temperature and fan speed steps
tempSteps = [55, 57, 60, 65, 70] # [°C]
@@ -35,21 +39,21 @@ cpuTempOld = 0
fanSpeedOld = 0
if debug:
print("%s Temp: %s, Fan: %s" % (date.today(), cpuTemp, fanSpeed))
print('%s Temp: %s, Fan: %s' % (date.today(), cpuTemp, fanSpeed))
# We must set a speed value for each temperature step
if len(speedSteps) != len(tempSteps):
print("Numbers of temp steps and speed steps are different")
print('Numbers of temp steps and speed steps are different')
exit(0)
try:
while 1:
# Read CPU temperature
cpuTempFile = open("/sys/class/thermal/thermal_zone0/temp", "r")
cpuTempFile = open('/sys/class/thermal/thermal_zone0/temp', 'r')
cpuTemp = float(cpuTempFile.read()) / 1000
cpuTempFile.close()
if debug:
print("%s Temp: %s, Fan: %s" % (date.today(), cpuTemp, fanSpeed))
print('%s Temp: %s, Fan: %s' % (date.today(), cpuTemp, fanSpeed))
# Calculate desired fan speed
if abs(cpuTemp - cpuTempOld) > hyst:
# Below first value, fan will run at min speed.
@@ -72,15 +76,21 @@ try:
and (fanSpeed >= FAN_MIN or fanSpeed == 0)):
fan.ChangeDutyCycle(fanSpeed)
fanSpeedOld = fanSpeed
if debug:
print("%s Temp: %s, Fan: %s" % (date.today(), cpuTemp, fanSpeed))
if path.isdir(prom_collect_dir):
with open(prom_collect_file, 'w') as f:
str = '#HELP rpi_fan fan running at percent duty cycle\n'
str += '#TYPE rpi_fan gauge\n'
str += 'rpi_fan{component="sys"} %s\n' % fanSpeed
f.write(str)
if debug:
print('%s Temp: %s, Fan: %s' % (date.today(), cpuTemp, fanSpeed))
cpuTempOld = cpuTemp
# Wait until next refresh
time.sleep(WAIT_TIME)
# If a keyboard interrupt occurs (ctrl + c), the GPIO is set to 0 and the program exits.
finally:
print("Fan ctrl interrupted by keyboard")
except Exception as exception:
print('Exception: {}'.format(type(exception).__name__))
print('Exception message: {}'.format(exception))
GPIO.cleanup()
sys.exit()