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#!/usr/bin/python
#
# check_remote_host.py -- nagios plugin uses Mklivestatus to get the overall
# status
# of a host. The entities considered for the status of the host are -
# 1. Host is reachable
# 2. LV/Inode Service status
# 3. CPU Utilization
# 4. Memory Utilization
# 5. Network Utilization
# 6. Swap Utilization
#
# Copyright (C) 2014 Red Hat Inc
#
# This program 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 2
# of the License, or (at your option) any later version.
#
# This program 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,USA
#
import os
import sys
import shlex
import subprocess
import socket
import getopt
STATUS_OK = 0
STATUS_WARNING = 1
STATUS_CRITICAL = 2
STATUS_UNKNOWN = 3
_checkPingCommand = "/usr/lib64/nagios/plugins/check_ping"
_commandStatusStrs = {STATUS_OK: 'OK', STATUS_WARNING: 'WARNING',
STATUS_CRITICAL: 'CRITICAL', STATUS_UNKNOWN: 'UNKNOWN'}
_socketPath = '/var/spool/nagios/cmd/live'
# Class for exception definition
class checkPingCmdExecFailedException(Exception):
message = "check_ping command failed"
def __init__(self, rc=0, out=(), err=()):
self.rc = rc
self.out = out
self.err = err
def __str__(self):
o = '\n'.join(self.out)
e = '\n'.join(self.err)
if o and e:
m = o + '\n' + e
else:
m = o or e
s = self.message
if m:
s += '\nerror: ' + m
if self.rc:
s += '\nreturn code: %s' % self.rc
return s
# Method to execute a command
def execCmd(command):
proc = subprocess.Popen(command,
close_fds=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = proc.communicate()
return (proc.returncode, out, err)
# Method to check the ing status of the host
def getPingStatus(hostAddr):
cmd = "%s -H %s" % (_checkPingCommand, hostAddr)
cmd += " -w 3000.0,80% -c 5000.0,100%"
try:
(rc, out, err) = execCmd(shlex.split(cmd))
except (OSError, ValueError) as e:
raise checkPingCmdExecFailedException(err=[str(e)])
if rc != 0:
raise checkPingCmdExecFailedException(rc, [out], [err])
return rc
# Method to execute livestatus
def checkLiveStatus(hostAddr, srvc):
s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect(_socketPath)
# Write command to socket
cmd = "GET services\nColumns: state\nFilter: "
"description = %s\nFilter: host_address = %s\n" % (srvc, hostAddr)
s.send(cmd)
# Close socket
s.shutdown(socket.SHUT_WR)
# Read the answer
answer = s.recv(1000000)
# Parse the answer into a table
table = [line.split(';') for line in answer.split('\n')[:-1]]
if len(table) > 0 and len(table[0]) > 0:
return int(table[0][0])
else:
return STATUS_UNKNOWN
# Method to show the usage
def showUsage():
usage = "Usage: %s -H <Host Address>\n" % os.path.basename(sys.argv[0])
sys.stderr.write(usage)
# Main method
if __name__ == "__main__":
try:
opts, args = getopt.getopt(sys.argv[1:], "hH:", ["help", "host="])
except getopt.GetoptError as e:
print (str(e))
showUsage()
sys.exit(STATUS_CRITICAL)
hostAddr = ''
if len(opts) == 0:
showUsage()
sys.exit(STATUS_CRITICAL)
else:
for opt, arg in opts:
if opt in ("-h", "--help"):
showUsage()
sys.exit()
elif opt in ("-H", "--host"):
hostAddr = arg
else:
showUsage()
sys.exit(STATUS_CRITICAL)
# Check ping status of the node, if its not reachable exit
try:
pingStatus = getPingStatus(hostAddr)
except (checkPingCmdExecFailedException) as e:
print "Host Status %s - Host not reachable" % \
(_commandStatusStrs[STATUS_UNKNOWN])
sys.exit(_commandStatusStrs[STATUS_UNKNOWN])
if pingStatus != STATUS_OK:
print "Host Status %s - Host not reachable" % \
(_commandStatusStrs[STATUS_UNKNOWN])
sys.exit(pingStatus)
# Check the various performance statuses for the host
diskPerfStatus = checkLiveStatus(hostAddr, 'Disk Utilization')
cpuPerfStatus = checkLiveStatus(hostAddr, 'Cpu Utilization')
memPerfStatus = checkLiveStatus(hostAddr, 'Memory Utilization')
swapPerfStatus = checkLiveStatus(hostAddr, 'Swap Utilization')
nwPerfStatus = checkLiveStatus(hostAddr, 'Network Utilization')
# Calculate the consolidated status for the host based on above status
# details
finalStatus = pingStatus | diskPerfStatus | cpuPerfStatus | \
memPerfStatus | swapPerfStatus | nwPerfStatus
# Get the list of ciritical services
criticalSrvcs = []
if diskPerfStatus == STATUS_CRITICAL:
criticalSrvcs.append('Disk Utilization')
if cpuPerfStatus == STATUS_CRITICAL:
criticalSrvcs.append('Cpu Utilization')
if memPerfStatus == STATUS_CRITICAL:
criticalSrvcs.append('Memory Utilization')
if swapPerfStatus == STATUS_CRITICAL:
criticalSrvcs.append('Swap Utilization')
if nwPerfStatus == STATUS_CRITICAL:
criticalSrvcs.append('Network Utilization')
# Return the status
if finalStatus == STATUS_CRITICAL:
print "Host Status %s - Service(s) %s in CRITICAL state" % \
(_commandStatusStrs[STATUS_WARNING], criticalSrvcs)
sys.exit(STATUS_WARNING)
print "Host Status %s - Services in good health" % \
_commandStatusStrs[STATUS_OK]
sys.exit(STATUS_OK)
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