mirror of
https://github.com/apache/cloudstack.git
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9aa7d4e818
- Removes old/dead files - Refactors file path/location, backward compatible to filepaths in systemvm.isoa - Fixes failures around apache2
381 lines
11 KiB
Python
Executable File
381 lines
11 KiB
Python
Executable File
#!/usr/bin/python
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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from ConfigParser import SafeConfigParser
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from subprocess import *
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from os import path
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import time
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import os
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import logging
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class StatusCodes:
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SUCCESS = 0
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FAILED = 1
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INVALID_INP = 2
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RUNNING = 3
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STOPPED = 4
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STARTING = 5
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class Log:
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INFO = 'INFO'
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ALERT = 'ALERT'
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CRIT = 'CRIT'
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NOTIF = 'NOTIF'
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class Config:
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MONIT_AFTER_MINS = 30
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SLEEP_SEC = 1
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RETRY_ITERATIONS = 10
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RETRY_FOR_RESTART = 5
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MONITOR_LOG = '/var/log/monitor.log'
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UNMONIT_PS_FILE = '/etc/unmonit_psList.txt'
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def getConfig( config_file_path = "/etc/monitor.conf" ):
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"""
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Reads the process configuration from the config file.
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Config file contains the processes to be monitored.
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"""
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process_dict = {}
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parser = SafeConfigParser()
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parser.read( config_file_path )
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for section in parser.sections():
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process_dict[section] = {}
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for name, value in parser.items(section):
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process_dict[section][name] = value
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# printd (" %s = %r" % (name, value))
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return process_dict
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def printd (msg):
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"""
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prints the debug messages
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"""
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#for debug
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#print msg
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return 0
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f= open(Config.MONITOR_LOG,'r+')
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f.seek(0, 2)
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f.write(str(msg)+"\n")
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f.close()
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def raisealert(severity, msg, process_name=None):
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""" Writes the alert message"""
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#timeStr=str(time.ctime())
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if process_name is not None:
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log = '['+severity +']'+" " + '['+process_name+']' + " " + msg +"\n"
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else:
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log = '['+severity+']' + " " + msg +"\n"
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logging.basicConfig(level=logging.INFO,filename='/var/log/routerServiceMonitor.log',format='%(asctime)s %(message)s')
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logging.info(log)
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msg = 'logger -t monit '+ log
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pout = Popen(msg, shell=True, stdout=PIPE)
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def isPidMatchPidFile(pidfile, pids):
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""" Compares the running process pid with the pid in pid file.
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If a process with multiple pids then it matches with pid file
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"""
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if pids is None or isinstance(pids,list) != True or len(pids) == 0:
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printd ("Invalid Arguments")
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return StatusCodes.FAILED
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if not path.isfile(pidfile):
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#It seems there is no pid file for this service
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printd("The pid file "+pidfile+" is not there for this process")
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return StatusCodes.FAILED
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fd=None
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try:
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fd = open(pidfile,'r')
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except:
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printd("pid file: "+ pidfile +" open failed")
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return StatusCodes.FAILED
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inp = fd.read()
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if not inp:
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fd.close()
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return StatusCodes.FAILED
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printd("file content "+str(inp))
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printd(pids)
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tocheck_pid = inp.strip()
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for item in pids:
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if str(tocheck_pid) == item.strip():
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printd("pid file matched")
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fd.close()
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return StatusCodes.SUCCESS
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fd.close()
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return StatusCodes.FAILED
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def checkProcessRunningStatus(process_name, pidFile):
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printd("checking the process " + process_name)
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cmd = ''
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pids = []
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cmd = 'pidof ' + process_name
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printd(cmd)
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#cmd = 'service ' + process_name + ' status'
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pout = Popen(cmd, shell=True, stdout=PIPE)
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exitStatus = pout.wait()
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temp_out = pout.communicate()[0]
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#check there is only one pid or not
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if exitStatus == 0:
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pids = temp_out.split(' ')
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printd("pid(s) of process %s are %s " %(process_name, pids))
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#there is more than one process so match the pid file
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#if not matched set pidFileMatched=False
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printd("Checking pid file")
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if isPidMatchPidFile(pidFile, pids) == StatusCodes.SUCCESS:
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return True,pids
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printd("pid of exit status %s" %exitStatus)
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return False,pids
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def restartService(service_name):
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cmd = 'service ' + service_name + ' restart'
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cout = Popen(cmd, shell=True, stdout=PIPE, stderr=STDOUT)
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return_val = cout.wait()
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if return_val == 0:
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printd("The service " + service_name +" recovered successfully ")
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msg="The process " +service_name+" is recovered successfully "
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raisealert(Log.INFO,msg,service_name)
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return True
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else:
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printd("process restart failed ....")
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return False
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def checkProcessStatus( process ):
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"""
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Check the process running status, if not running tries to restart
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"""
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process_name = process.get('processname')
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service_name = process.get('servicename')
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pidfile = process.get('pidfile')
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#temp_out = None
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restartFailed=False
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pidFileMatched=False
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pids=''
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cmd=''
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if process_name is None:
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printd ("\n Invalid Process Name")
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return StatusCodes.INVALID_INP
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status, pids = checkProcessRunningStatus(process_name, pidfile)
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if status == True:
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printd("The process is running ....")
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return StatusCodes.RUNNING
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else:
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printd("Process %s is not running trying to recover" %process_name)
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#Retry the process state for few seconds
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for i in range(1, Config.RETRY_ITERATIONS):
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time.sleep(Config.SLEEP_SEC)
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if i < Config.RETRY_FOR_RESTART: # this is just for trying few more times
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status, pids = checkProcessRunningStatus(process_name, pidfile)
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if status == True:
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raisealert(Log.ALERT, "The process detected as running", process_name)
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break
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else:
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printd("Process %s is not running checking the status again..." %process_name)
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continue
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else:
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msg="The process " +process_name+" is not running trying recover "
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raisealert(Log.INFO,process_name,msg)
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if service_name == 'apache2':
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# Killing apache2 process with this the main service will not start
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for pid in pids:
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cmd = 'kill -9 '+pid
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printd(cmd)
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Popen(cmd, shell=True, stdout=PIPE, stderr=STDOUT)
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if restartService(service_name) == True:
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break
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else:
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restartFailed = True
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continue
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#for end here
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if restartFailed == True:
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msg="The process %s recover failed "%process_name
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raisealert(Log.ALERT,process_name,msg)
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printd("Restart failed after number of retries")
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return StatusCodes.STOPPED
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return StatusCodes.RUNNING
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def monitProcess( processes_info ):
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"""
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Monitors the processes which got from the config file
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"""
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if len( processes_info ) == 0:
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printd("Invalid Input")
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return StatusCodes.INVALID_INP
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dict_unmonit={}
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umonit_update={}
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unMonitPs=False
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if not path.isfile(Config.UNMONIT_PS_FILE):
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printd('Unmonit File not exist')
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else:
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#load the dictionary with unmonit process list
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dict_unmonit = loadPsFromUnMonitFile()
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#time for noting process down time
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csec = repr(time.time()).split('.')[0]
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for process,properties in processes_info.items():
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#skip the process it its time stamp less than Config.MONIT_AFTER_MINS
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printd ("checking the service %s \n" %process)
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if not is_emtpy(dict_unmonit):
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if dict_unmonit.has_key(process):
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ts = dict_unmonit[process]
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if checkPsTimeStampForMonitor (csec, ts, properties) == False:
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unMonitPs = True
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continue
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if checkProcessStatus( properties) != StatusCodes.RUNNING:
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printd( "\n Service %s is not Running"%process)
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#add this process into unmonit list
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printd ("updating the service for unmonit %s\n" %process)
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umonit_update[process]=csec
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#if dict is not empty write to file else delete it
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if not is_emtpy(umonit_update):
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writePsListToUnmonitFile(umonit_update)
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else:
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if is_emtpy(umonit_update) and unMonitPs == False:
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#delete file it is there
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removeFile(Config.UNMONIT_PS_FILE)
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def checkPsTimeStampForMonitor(csec,ts, process):
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printd("Time difference=%s" %str(int(csec) - int(ts)))
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tmin = (int(csec) - int(ts) )/60
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if ( int(csec) - int(ts) )/60 < Config.MONIT_AFTER_MINS:
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raisealert(Log.ALERT, "The %s get monitor after %s minutes " %(process, Config.MONIT_AFTER_MINS))
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printd('process will be monitored after %s min' %(str(int(Config.MONIT_AFTER_MINS) - tmin)))
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return False
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return True
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def removeFile(fileName):
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if path.isfile(fileName):
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printd("Removing the file %s" %fileName)
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os.remove(fileName)
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def loadPsFromUnMonitFile():
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dict_unmonit = {}
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try:
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fd = open(Config.UNMONIT_PS_FILE)
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except:
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printd("Failed to open file %s " %(Config.UNMONIT_PS_FILE))
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return StatusCodes.FAILED
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ps = fd.read()
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if not ps:
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printd("File %s content is empty " %Config.UNMONIT_PS_FILE)
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return StatusCodes.FAILED
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printd(ps)
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plist = ps.split(',')
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plist.remove('')
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for i in plist:
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dict_unmonit[i.split(':')[0]] = i.split(':')[1]
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fd.close()
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return dict_unmonit
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def writePsListToUnmonitFile(umonit_update):
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printd("Write updated unmonit list to file")
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line=''
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for i in umonit_update:
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line+=str(i)+":"+str(umonit_update[i])+','
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printd(line)
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try:
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fd=open(Config.UNMONIT_PS_FILE,'w')
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except:
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printd("Failed to open file %s " %Config.UNMONIT_PS_FILE)
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return StatusCodes.FAILED
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fd.write(line)
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fd.close()
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def is_emtpy(struct):
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"""
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Checks wether the given struct is empty or not
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"""
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if struct:
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return False
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else:
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return True
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def main():
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'''
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Step1 : Get Config
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'''
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printd("monitoring started")
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temp_dict = getConfig()
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'''
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Step2: Monitor and Raise Alert
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'''
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monitProcess( temp_dict )
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if __name__ == "__main__":
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main()
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