#!/usr/bin/python
#
# Copyright 2010, Pall Sigurdsson <palli@opensource.is>
#
# This script is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This script is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# About this script
#
# This script will check the status of a remote IBM Bladecenter via SNMP.


# No real need to change anything below here
version = "1.1.2"
ok = 0
warning = 1
critical = 2
unknown = 3
not_present = -1
exit_status = -1


state = {}
state[not_present] = "Not Present"
state[ok] = "OK"
state[warning] = "Warning"
state[critical] = "Critical"
state[unknown] = "Unknown"


longserviceoutput = "\n"
perfdata = ""
summary = ""
sudo = False


from sys import exit
from sys import argv
from os import getenv, putenv, environ
import subprocess


# Parse some Arguments
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-m", "--mode", dest="mode",
                  help="Which check mode is in use (powermodules,system-health,temperature,chassis-status,bladehealth,blowers,switchmodules)")
parser.add_option("-H", "--host", dest="host",
                  help="Hostname or IP address of the host to check")
parser.add_option("-w", "--warning", dest="warning_threshold",
                  help="Warning threshold", type="int", default=None)
parser.add_option("-c", "--critical", type="int", dest="critical_threshold",
                  help="Critical threshold", default=None)
parser.add_option("-e", "--exclude", dest="exclude",
                  help="Exclude specific object", default=None)
parser.add_option("-v", "--snmp_version", dest="snmp_version",
                  help="SNMP Version to use (1, 2c or 3)", default="1")
parser.add_option("-u", "--snmp_username", dest="snmp_username",
                  help="SNMP username (only with SNMP v3)", default=None)
parser.add_option("-C", "--snmp_community", dest="snmp_community",
                  help="SNMP Community (only with SNMP v1|v2c)", default=None)
parser.add_option("-p", "--snmp_password", dest="snmp_password",
                  help="SNMP password (only with SNMP v3)", default=None)
parser.add_option("-l", "--snmp_security_level", dest="snmp_seclevel",
                  help="SNMP security level (only with SNMP v3) (noAuthNoPriv|authNoPriv|authPriv)", default=None)
parser.add_option("-t", "--snmp_timeout", dest="snmp_timeout",
                  help="Timeout in seconds for SNMP", default=10)
parser.add_option("-d", "--debug", dest="debug",
                  help="Enable debugging (for troubleshooting", action="store_true", default=False)

(opts, args) = parser.parse_args()


if opts.host is None:
    parser.error("Hostname (-H) is required.")
if opts.mode is None:
    parser.error("Mode (--mode) is required.")

snmp_options = ""


def set_snmp_options():
    global snmp_options
    if opts.snmp_version is not None:
        snmp_options = snmp_options + " -v%s" % opts.snmp_version
    if opts.snmp_version == "3":
        if opts.snmp_username is None:
            parser.error("--snmp_username required with --snmp_version=3")
        if opts.snmp_seclevel is None:
            parser.error(
                "--snmp_security_level required with --snmp_version=3")
        if opts.snmp_password is None:
            parser.error("--snmp_password required with --snmp_version=3")
        snmp_options = snmp_options + " -u %s -l %s -A %s " % (
            opts.snmp_username, opts.snmp_seclevel, opts.snmp_password)
    else:
        if opts.snmp_community is None:
            parser.error(
                "--snmp_community is required with --snmp_version=1|2c")
        snmp_options = snmp_options + " -c %s " % opts.snmp_community
    snmp_options += " -t %s " % (opts.snmp_timeout)


def error(errortext):
    print "* Error: %s" % errortext
    exit(unknown)


def debug(debugtext):
    if opts.debug:
        print debugtext


def nagios_status(newStatus):
    global exit_status
    exit_status = max(exit_status, newStatus)
    return exit_status


def runCommand(command):
    '''runCommand: Runs command from the shell prompt. Exit Nagios style if unsuccessful'''
    debug("Executing: %s" % command)
    proc = subprocess.Popen(
        command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE,)
    stdout, stderr = proc.communicate('through stdin to stdout')
    if proc.returncode > 0:
        print "Error %s: %s\n command was: '%s'" % (proc.returncode, stderr.strip(), command)
        debug("results: %s" % (stdout.strip()))
        if proc.returncode == 127:  # File not found, lets print path
            path = getenv("PATH")
            print "Check if your path is correct %s" % (path)
        if stderr.find('Password:') == 0 and command.find('sudo') == 0:
            print "Check if user is in the sudoers file"
        if stderr.find('sorry, you must have a tty to run sudo') == 0 and command.find('sudo') == 0:
            print "Please remove 'requiretty' from /etc/sudoers"
        exit(unknown)
    else:
        return stdout


def end():
    global summary
    global longserviceoutput
    global perfdata
    global exit_status
    print "%s - %s | %s" % (state[exit_status], summary, perfdata)
    print longserviceoutput
    if exit_status < 0:
        exit_status = unknown
    exit(exit_status)


def add_perfdata(text):
    global perfdata
    text = text.strip()
    perfdata = perfdata + " %s " % (text)


def add_long(text):
    global longserviceoutput
    longserviceoutput = longserviceoutput + text + '\n'


def add_summary(text):
    global summary
    summary = summary + text


def set_path(path):
    current_path = getenv('PATH')
    if current_path.find('C:\\') > -1:  # We are on this platform
        if path == '':
            pass
        else:
            path = ';' + path
    else:  # Unix/Linux, etc
        if path == '':
            path = ":/usr/sbin"
        else:
            path = ':' + path
    current_path = "%s%s" % (current_path, path)
    environ['PATH'] = current_path


def snmpget(oid):
    snmpgetcommand = "snmpget %s %s %s" % (snmp_options, opts.host, oid)
    output = runCommand(snmpgetcommand)
    oid, result = output.strip().split(' = ', 1)
    resultType, resultValue = result.split(': ', 1)
    if resultType == 'STRING':  # strip quotes of the string
        resultValue = resultValue[1:-1]
    return resultValue

# snmpwalk -v3 -u v3get mgmt-rek-proxy-p02 -A proxy2011 -l authNoPriv
# 1.3.6.1.4.1.15497


def snmpwalk(base_oid):
    snmpwalkcommand = "snmpwalk %s %s %s" % (snmp_options, opts.host, base_oid)
    output = runCommand(snmpwalkcommand + " " + base_oid)
    return output


def getTable(base_oid):
    myTable = {}
    output = snmpwalk(base_oid)
    for line in output.split('\n'):
        tmp = line.strip().split(' = ', 1)
        if len(tmp) == 2:
            oid, result = tmp
        else:
            continue
        tmp = result.split(': ', 1)
        if len(tmp) > 1:
            resultType, resultValue = tmp[0], tmp[1]
        else:
            resultType = None
            resultValue = tmp[0]
        if resultType == 'STRING':  # strip quotes of the string
            resultValue = resultValue[1:-1]
        index = oid.strip().split('.')
        column = int(index.pop())
        row = int(index.pop())
        if not myTable.has_key(column):
            myTable[column] = {}
        myTable[column][row] = resultValue
    return myTable


def check_powermodules():
    powermodules = getTable('1.3.6.1.4.1.2.3.51.2.2.4')
    index = 1
    exists = 2
    status = 3
    details = 4
    num_ok = 0
    num_no = 0
    for i in powermodules.values():
        myIndex = i[index]
        myStatus = i[status]
        myDetails = i[details]
        myExists = i[exists]
        if myIndex == opts.exclude:
            continue
        if myExists == "0":
            num_no = num_no + 1
        else:
            if myStatus != "1":
                nagios_status(warning)
                add_summary('Powermodule "%s" status "%s". %s. ' %
                            (myIndex, myStatus, myDetails))
            else:
                num_ok = num_ok + 1
        add_long('Powersupply "%s" status "%s". %s. ' %
                 (myIndex, myStatus, myDetails))
    add_summary("%s out of %s powermodules are healthy" %
                (num_ok, len(powermodules)))
    add_perfdata("'Number of powermodules'=%s" %
                 (len(powermodules) - num_no))

    nagios_status(ok)


def check_switchmodules():
    switchmodules = getTable("1.3.6.1.4.1.2.3.51.2.22.3.1.1")
    # The following oid is undocumented, but contains some useful extra info
    try:
        extrainfo = getTable("1.3.6.1.4.1.2.3.51.2.22.3.1.7").values()
    except:
        extrainfo = []
    for module in switchmodules.values():
        myIndex = module[1]
        healthstate = module[15]
        resultavailable = module[3]
        resultvalue = module[4]
        enabledisable = module[6]
        if resultavailable == "1":
            'this module is installed'
            if healthstate == "1":
                nagios_status(ok)
                add_long("Module%s health good.\n  post=%s" %
                         (myIndex, resultvalue))
            else:
                nagios_status(warning)
                add_long("Module%s health bad(%s).\n  post=%s" %
                         (myIndex, healthstate, resultvalue))
                add_summary("Problem with Module %s. " % (myIndex))
            if len(extrainfo) > int(myIndex):
                try:
                    myExtraInfo = extrainfo[int(myIndex) - 1]
                    module_type = myExtraInfo[22]
                    module_ip = myExtraInfo[6]
                    add_long("  type=%s ip=%s" % (module_type, module_ip))
                except:
                    pass
    if exit_status == ok:
        add_summary("All switchmodules healthy")


def check_blowers():
    " Check blower status "
    blowers = getTable("1.3.6.1.4.1.2.3.51.2.2.3")
    # This mib only seems to support 2 blowers.
    blower1speed = snmpget("1.3.6.1.4.1.2.3.51.2.2.3.1.0")
    blower1state = snmpget("1.3.6.1.4.1.2.3.51.2.2.3.10.0")

    blower2speed = snmpget("1.3.6.1.4.1.2.3.51.2.2.3.2.0")
    blower2state = snmpget("1.3.6.1.4.1.2.3.51.2.2.3.11.0")

    add_long("Blower 1 state=%s speed=%s" % (blower1state, blower1speed))
    add_long("Blower 2 state=%s speed=%s" % (blower2state, blower2speed))
    add_perfdata("blower1=%s" % (blower1speed.split(None, 1)[0]))
    add_perfdata("blower2=%s" % (blower2speed.split(None, 1)[0]))
    # Check blower 1
    if blower1state == "1":
        nagios_status(ok)
        add_summary("Blower1 OK. ")
    else:
        add_summary("Blower1 NOT OK. ")
        nagios_status(warning)

    # Check blower 2
    if blower2state == "1":
        nagios_status(ok)
        add_summary("Blower2 OK. ")
    else:
        add_summary("Blower2 NOT OK. ")
        nagios_status(warning)

    if blower1state != "1" and blower2state != "1":
        nagios_status(critical)


def check_chassis_status():
    chassis = getTable('1.3.6.1.4.1.2.3.51.2.2.5.2')
    oids = chassis.values()[0]
    chassis_oid = {
        1: "bistSdram",
        10: "bistBootRomFlashImage",
            11: "bistEthernetPort1",
            113: "bistSwitchModulesCommunicating",
            12: "bistEthernetPort2",
            13: "bistInternalPCIBus",
            14: "bistExternalI2CDevices",
            15: "bistUSBController",
            16: "bistVideoCompressorBoard",
            17: "bistPrimaryBus",
            18: "bistInternalEthernetSwitch",
            2: "bistRs485Port1",
            3: "bistRs485Port2",
            33: "bistBladesInstalled",
            4: "bistNvram",
            49: "bistBladesCommunicating",
            6: "bistRtc",
            65: "bistBlowersInstalled",
            7: "bistLocalI2CBus",
            73: "bistBlowersFunctional",
            74: "bistMediaTrayInstalled",
            75: "bistMediaTrayCommunicating",
            8: "bistPrimaryMainAppFlashImage",
            81: "bistPowerModulesInstalled",
            89: "bistPowerModulesFunctional",
            9: "bistSecondaryMainAppFlashImage",
            97: "bistSwitchModulesInstalled",
    }

    # Check if all blades are working
    bistBladesInstalled = 33
    bistBlowersInstalled = 65
    bistMediaTrayInstalled = 74
    bistPowerModulesInstalled = 81
    bistSwitchModulesInstalled = 97

    bistSwitchModulesCommunicating = 113
    bistBladesCommunicating = 49
    bistMediaTrayCommunicating = 75
    bistBlowersFunctional = 73
    bistPowerModulesFunctional = 89

    # Check Blade Communications
    if not oids.has_key(bistBladesInstalled) or not oids.has_key(bistBladesCommunicating):
        add_summary("Blades N/A. ")
    elif oids[bistBladesInstalled] == oids[bistBladesCommunicating]:
        nagios_status(ok)
        add_summary("Blades OK. ")
    else:
        nagios_status(warning)
        add_summary("Blades NOT OK. ")
    # Check PowerModule Status
    if not oids.has_key(bistPowerModulesFunctional) or not oids.has_key(bistPowerModulesInstalled):
        add_summary("Powermodules N/A. ")
    elif oids[bistPowerModulesFunctional] == oids[bistPowerModulesInstalled]:
        nagios_status(ok)
        add_summary("PowerModules OK. ")
    else:
        nagios_status(warning)
        add_summary("PowerModules NOT OK. ")

    # Check SwitcModule Communications
    if not oids.has_key(bistSwitchModulesCommunicating) or not oids.has_key(bistSwitchModulesInstalled):
        add_summary("SwitchModules N/A. ")
    if oids[bistSwitchModulesCommunicating] == oids[bistSwitchModulesInstalled]:
        nagios_status(ok)
        add_summary("Switchmodules OK. ")
    else:
        nagios_status(warning)
        add_summary("Switchmodules NOT OK. ")
    # Check blower status
    if not oids.has_key(bistBlowersInstalled) or not oids.has_key(bistBlowersFunctional):
        add_summary("Blowers N/A. ")
    elif oids[bistBlowersInstalled] == oids[bistBlowersFunctional]:
        nagios_status(ok)
        add_summary("Blowers OK. ")
    else:
        nagios_status(warning)
        add_summary("Blowers NOT OK. ")
    # Check Media Tray Status
    if not oids.has_key(bistMediaTrayCommunicating) or not oids.has_key(bistMediaTrayInstalled):
        nagios_status(ok)
        add_summary("Media Trays N/A. ")
    elif oids[bistMediaTrayCommunicating] == oids[bistMediaTrayInstalled]:
        add_summary("Media Trays OK. ")
    else:
        nagios_status(warning)
        add_summary("Media Trays NOT OK. ")

    # status_oids, oids that where 0 == ok
    status_oids = (2, 3, 5, 7, 8, 9, 10, 11, 14, 18,
                   19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, )

    add_long("Other Sensors: ")
    sensor_status = ok
    for oid in status_oids:
        if not chassis_oid.has_key(oid):
            continue
        oidValue = oids[oid]
        oidName = chassis_oid[oid]
        if oidValue == "0":
            friendly_status = "%s (ok)" % oidValue
        else:
            friendly_status = "%s (not ok)" % oidValue
            nagios_status(warning)
            sensor_status = warning
            add_summary("%s is %s" % oidName, friendly_status)
        add_long(" %s status: %s" % (oidName, friendly_status))
    if sensor_status == ok:
        add_summary("Other Sensors: OK. ")


def check_bladehealth():
    blades = getTable('1.3.6.1.4.1.2.3.51.2.22.1.5.2.1')
    bladestate = getTable('1.3.6.1.4.1.2.3.51.2.22.1.5.1.1').values()

    index, bladeid, severity, description = (1, 2, 3, 4)
    good_blades = 0
    total_blades = 0
    for i, row in enumerate(blades.values()):
        myIndex = row[index]
        myBladeid = row[bladeid]
        mySeverity = row[severity]
        myDescription = row[description]
        try:
            myName = bladestate[i][6]
        except:
            myName = ""
        if mySeverity == "(No severity)":
            continue
        add_long("blade%s (%s): %s %s" %
                 (myBladeid, myName, mySeverity, myDescription))
        if opts.exclude:
            if myDescription.find(opts.exclude) > -1:
                continue
        total_blades += 1
        if mySeverity == 'Good':
            nagios_status(ok)
            good_blades += 1
        else:
            nagios_status(warning)
            add_summary("blade%s (%s): %s %s. " %
                        (myBladeid, myName, mySeverity, myDescription))
    if good_blades == total_blades:
        add_summary("%s out of %s blades in Good health. " %
                    (good_blades, total_blades))
        nagios_status(ok)
    else:
        nagios_status(warning)


def check_systemhealth():
    systemhealthstat = snmpget('1.3.6.1.4.1.2.3.51.2.2.7.1.0')
    summary = getTable('1.3.6.1.4.1.2.3.51.2.2.7.2.1')
    index, severity, description, date = (1, 2, 3, 4)
    # Sometimes chassis delivers warning when absolutely nothing is going on.
    # Lets work around that
    workaround = [{1: '1', 2: 'Good', 3: 'No critical or warning events', 4: 'No timestamp'}]
    # Check overall health
    if systemhealthstat == '255':
        nagios_status(ok)
        add_summary("Bladecenter health: OK. ")
    elif summary.values() == workaround:
        add_summary("Non-Critical Error (bug in firmware): '%s' " %
                    workaround[0][description])
        nagios_status(ok)
        return
    elif systemhealthstat == "2":
        nagios_status(warning)
        add_summary("Non-Critical Error. ")
    elif systemhealthstat == "4":
        nagios_status(critical)
        add_summary("System-Level Error. ")
    elif systemhealthstat == "0":
        nagios_status(critical)
        add_summary("Critical. ")
    else:
        nagios_status(unknown)
        add_summary(
            "Bladecenter health unkown (oid 1.3.6.1.4.1.2.3.51.2.2.7.1.0 returns %s). " %
            systemhealthstat)
    for row in summary.values():
        if row[severity] == 'Good':
            nagios_status(ok)
        elif row[severity] == 'Warning':
            nagios_status(warning)
        elif row[severity] == 'System Level':
            nagios_status(warning)
        else:
            nagios_status(critical)
        add_summary("%s. " % (row[description]))
        add_long("* %s. " % (row[description]))


def check_temperature():
    # set some sensible defaults
    if opts.warning_threshold is None:
        opts.warning_threshold = 28
    if opts.critical_threshold is None:
        opts.critical_threshold = 35
    str_temp = snmpget('1.3.6.1.4.1.2.3.51.2.2.1.5.1.0')
    float_temp, measurement = str_temp.split(None, 1)
    float_temp = float(float_temp)
    if opts.critical_threshold is not None and float_temp > opts.critical_threshold:
        nagios_status(critical)
        add_summary(
            "ambient temperature (%s) is over critical thresholds (%s). " %
            (str_temp, opts.critical_threshold))
    elif opts.warning_threshold is not None and float_temp > opts.warning_threshold:
        nagios_status(warning)
        add_summary(
            "ambient temperature (%s) is over warning thresholds (%s). " %
            (str_temp, opts.warning_threshold))
    else:
        add_summary("Ambient temperature = %s. " % (str_temp))
    add_perfdata("'ambient_temp'=%s;%s;%s " %
                 (float_temp, opts.warning_threshold, opts.critical_threshold))
    #add_long( "Ambient Temperature = %s" % (str_temp) )
    nagios_status(ok)


if __name__ == '__main__':
    try:
        set_snmp_options()
        if opts.mode == 'powermodules':
            check_powermodules()
        elif opts.mode == 'system-health':
            check_systemhealth()
        elif opts.mode == 'temperature':
            check_temperature()
        elif opts.mode == 'chassis-status':
            check_chassis_status()
        elif opts.mode == 'bladehealth':
            check_bladehealth()
        elif opts.mode == 'blowers':
            check_blowers()
        elif opts.mode == 'switchmodules':
            check_switchmodules()
        else:
            parser.error("%s is not a valid option for --mode" % opts.mode)
    except Exception, e:
        print "Unhandled exception while running script: %s" % e
        exit(unknown)
    end()