Use a Raspberry Pi 2 to control some relays to reboot servers

server_rebooter.py

#!/usr/bin/env python2
#
# server_rebooter.py

import time
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)  # use Broadcom numbering system
GPIO.setwarnings(False)  # override any warnings about a pin being in use, comment this out to show those warnings

def relay_pin(relay_name):
  """ Returns the BCM pin number corresponding to the specified relay name """
  pin_mappings = {
    'IN1': 26,
    'IN2': 19,
    'IN3': 13,
    'IN4': 6,
    }
  return pin_mappings.get(relay_name)


# get input from user to specify relay name
while True:
  response = raw_input("Please specify which relay to activate: \nIN1: Storm-Power On\nIN2: Storm-Reset\nIN3: Phenom-Power On\nIN4: Phenom-Reset\n")
  if response in ['IN1', 'IN2', 'IN3', 'IN4']:
    break
  else:
    print "Name must from IN1 to IN4."



# activate the specified relay for 0.25 seconds
print "Initializing BCM pin %s to activate relay %s." % (relay_pin(response), response)
GPIO.setup(relay_pin(response), GPIO.OUT)  # the specified pin is initialized, usually defaulting to the LOW state
GPIO.output(relay_pin(response), GPIO.LOW)  # explicitly set the pin to LOW in case it wasn't already
time.sleep(0.25)
GPIO.output(relay_pin(response), GPIO.HIGH)  # return the pin to HIGH to deactivate relay

GPIO.cleanup()