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fence_apc.py

#!/usr/bin/python

#####
##
## The Following Agent Has Been Tested On:
##
##  Model       Firmware
## +---------------------------------------------+
##  AP7951  AOS v2.7.0, PDU APP v2.7.3
##  AP7941      AOS v3.5.7, PDU APP v3.5.6
##  AP9606  AOS v2.5.4, PDU APP v2.7.3
##
## @note: ssh is very slow on AP79XX devices protocol (1) and 
##        cipher (des/blowfish) have to be defined
#####

import sys, re, pexpect, exceptions
sys.path.append("@FENCEAGENTSLIBDIR@")
from fencing import *

#BEGIN_VERSION_GENERATION
RELEASE_VERSION="New APC Agent - test release on steroids"
REDHAT_COPYRIGHT=""
BUILD_DATE="March, 2008"
#END_VERSION_GENERATION

def get_power_status(conn, options):
      exp_result = 0
      outlets = {}
      try:
            conn.send("1\r\n")
            conn.log_expect(options, options["-c"], int(options["-Y"]))

            version = 0
            admin = 0
            switch = 0;

            if (None != re.compile('.* MasterSwitch plus.*', re.IGNORECASE | re.S).match(conn.before)):
                  switch = 1;
                  if (None != re.compile('.* MasterSwitch plus 2', re.IGNORECASE | re.S).match(conn.before)):
                        if (0 == options.has_key("-s")):
                              fail_usage("Failed: You have to enter physical switch number")
                  else:
                        if (0 == options.has_key("-s")):
                              options["-s"] = "1"

            if (None == re.compile('.*Outlet Management.*', re.IGNORECASE | re.S).match(conn.before)):
                  version = 2
            else:
                  version = 3

            if (None == re.compile('.*Outlet Control/Configuration.*', re.IGNORECASE | re.S).match(conn.before)):
                  admin = 0
            else:
                  admin = 1

            if switch == 0:
                  if version == 2:
                        if admin == 0:
                              conn.send("2\r\n")
                        else:
                              conn.send("3\r\n")
                  else:
                        conn.send("2\r\n")
                        conn.log_expect(options, options["-c"], int(options["-Y"]))
                        conn.send("1\r\n")
            else:
                  conn.send(options["-s"]+"\r\n")
                  
            while True:
                  exp_result = conn.log_expect(options, [ options["-c"],  "Press <ENTER>" ], int(options["-Y"]))
                  lines = conn.before.split("\n");
                  show_re = re.compile('(^|\x0D)\s*(\d+)- (.*?)\s+(ON|OFF)\s*')
                  for x in lines:
                        res = show_re.search(x)
                        if (res != None):
                              outlets[res.group(2)] = (res.group(3), res.group(4))
                  conn.send("\r\n")
                  if exp_result == 0:
                        break
            conn.send(chr(03))            
            conn.log_expect(options, "- Logout", int(options["-Y"]))
            conn.log_expect(options, options["-c"], int(options["-Y"]))
      except pexpect.EOF:
            fail(EC_CONNECTION_LOST)
      except pexpect.TIMEOUT:
            fail(EC_TIMED_OUT)

      if ["list", "monitor"].count(options["-o"]) == 1:
            return outlets
      else:
            try:
                  (_, status) = outlets[options["-n"]]
                  return status.lower().strip()
            except KeyError:
                  fail(EC_STATUS)

def set_power_status(conn, options):
      action = {
            'on' : "1",
            'off': "2"
      }[options["-o"]]

      try:
            conn.send("1\r\n")
            conn.log_expect(options, options["-c"], int(options["-Y"]))

            version = 0
            admin2 = 0
            admin3 = 0
            switch = 0

            if (None != re.compile('.* MasterSwitch plus.*', re.IGNORECASE | re.S).match(conn.before)):
                  switch = 1;
                  ## MasterSwitch has different schema for on/off actions
                  action = {
                        'on' : "1",
                        'off': "3"
                  }[options["-o"]]
                  if (None != re.compile('.* MasterSwitch plus 2', re.IGNORECASE | re.S).match(conn.before)):
                        if (0 == options.has_key("-s")):
                              fail_usage("Failed: You have to enter physical switch number")
                  else:
                        if (0 == options.has_key("-s")):
                              options["-s"] = 1

            if (None == re.compile('.*Outlet Management.*', re.IGNORECASE | re.S).match(conn.before)):
                  version = 2
            else:
                  version = 3

            if (None == re.compile('.*Outlet Control/Configuration.*', re.IGNORECASE | re.S).match(conn.before)):
                  admin2 = 0
            else:
                  admin2 = 1

            if switch == 0:
                  if version == 2:
                        if admin2 == 0:
                              conn.send("2\r\n")
                        else:
                              conn.send("3\r\n")
                  else:
                        conn.send("2\r\n")
                        conn.log_expect(options, options["-c"], int(options["-Y"]))
                        if (None == re.compile('.*2- Outlet Restriction.*', re.IGNORECASE | re.S).match(conn.before)):
                              admin3 = 0
                        else:
                              admin3 = 1
                        conn.send("1\r\n")
            else:
                  conn.send(options["-s"] + "\r\n")

            while 1 == conn.log_expect(options, [ options["-c"],  "Press <ENTER>" ], int(options["-Y"])):
                  conn.send("\r\n")
            conn.send(options["-n"]+"\r\n")
            conn.log_expect(options, options["-c"], int(options["-Y"]))

            if switch == 0:
                  if admin2 == 1:
                        conn.send("1\r\n")
                        conn.log_expect(options, options["-c"], int(options["-Y"]))
                  if admin3 == 1:
                        conn.send("1\r\n")
                        conn.log_expect(options, options["-c"], int(options["-Y"]))
            else:
                  conn.send("1\r\n")
                  conn.log_expect(options, options["-c"], int(options["-Y"]))
                  
            conn.send(action+"\r\n")
            conn.log_expect(options, "Enter 'YES' to continue or <ENTER> to cancel :", int(options["-Y"]))
            conn.send("YES\r\n")
            conn.log_expect(options, "Press <ENTER> to continue...", int(options["-Y"]))
            conn.send("\r\n")
            conn.log_expect(options, options["-c"], int(options["-Y"]))
            conn.send(chr(03))
            conn.log_expect(options, "- Logout", int(options["-Y"]))
            conn.log_expect(options, options["-c"], int(options["-Y"]))
      except pexpect.EOF:
            fail(EC_CONNECTION_LOST)
      except pexpect.TIMEOUT:
            fail(EC_TIMED_OUT)

def main():
      device_opt = [  "help", "version", "agent", "quiet", "verbose", "debug",
                  "action", "ipaddr", "login", "passwd", "passwd_script",
                  "secure", "port", "identity_file", "switch", "test", "separator",
                  "inet4_only", "inet6_only", "ipport",
                  "power_timeout", "shell_timeout", "login_timeout", "power_wait" ]

      atexit.register(atexit_handler)

      options = check_input(device_opt, process_input(device_opt))

      ## 
      ## Fence agent specific defaults
      #####
      options["ssh_options"] = "-1 -c blowfish"

      if 0 == options.has_key("-c"):
            options["-c"] = "\n>"

      docs = { }
      docs["shortdesc"] = "Fence agent for APC over telnet/ssh"
      docs["longdesc"] = "fence_apc is an I/O Fencing agent \
which can be used with the APC network power switch. It logs into device \
via telnet/ssh  and reboots a specified outlet. Lengthy telnet/ssh connections \
should be avoided while a GFS cluster  is  running  because  the  connection \
will block any necessary fencing actions."
      docs["vendorurl"] = "http://www.apc.com"
      show_docs(options, docs)

      ## Support for -n [switch]:[plug] notation that was used before
      if (options.has_key("-n") == 1) and (-1 != options["-n"].find(":")):
            (switch, plug) = options["-n"].split(":", 1)
            options["-s"] = switch;
            options["-n"] = plug;

      ##
      ## Operate the fencing device
      ####
      conn = fence_login(options)
      result = fence_action(conn, options, set_power_status, get_power_status, get_power_status)

      ##
      ## Logout from system
      ##
      ## In some special unspecified cases it is possible that 
      ## connection will be closed before we run close(). This is not 
      ## a problem because everything is checked before.
      ######
      try:
            conn.sendline("4")
            conn.close()
      except exceptions.OSError:
            pass
      except pexpect.ExceptionPexpect:
            pass
      
      sys.exit(result)

if __name__ == "__main__":
      main()

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