Hi,

Jay SenSharma

Jay SenSharma

In every production environment we want to keep monitoring the State of our WebLogic Server, Like RUNNING, ADMIN, etc. Usually we face problem in getting the Status report, because most of the tools (Non-Operating System related) we know to accomplsh this task but those tools requires Admin Server to be UP and RUNNING to provide us the Current Status details of the Servers.

While running this WLST script you will get  “Caused by: java.rmi.ConnectException: Destination unreachable;”  which is Normal and expected if the Weblogic Server will not be running

So here we provide a simple WLST script which has the following features:

Features:

  1. Ready To Use: The Script do not require any kind of changes in the WLST Script, except the Administrators E-Mail address at line number: 24
  2. Standalone: You can use Check Server State At the mentioned “check.interval” interval by just changing the properties file. No need to use any Cron Job.
  3. AdminServer Independent: AdminServer Need not be running to get the Server State using thei Script.
  4. Reliable: Compared to the Cron Jobs which usually checks the Server Log and grep the Server State, This WLST script is more reliable.

Steps to Configure an Email Alert for Checking State Of Server

Step1) Create a Directory somewhere in your file system like :  “C:WLST”

Step2) Write a Properties file “domain.properties” inside “C:WLST” like following:

admin.username=weblogic
admin.password=weblogic

total.number.of.servers=3

server.name.1=AdminServer
server.url.1=t3://10.10.10.10:7001

server.name.2=MS-1
server.url.2=t3://10.10.10.10:7003

server.name.3=MS-2
server.url.3=t3://10.10.10.10:7005

# Check Server State At following interval in Seconds to check the State of the Server
check.interval=10

Step-3) Create a WLST Script somewhere in your file system with some name like “serverStateChecker.py” inside “C:WLST” contents will be something like following:

#############################################################################
#
# @author Copyright (c) 2010 - 2011 by Middleware Magic, All Rights Reserved.
#
#############################################################################
from java.util import Date
from java.io import FileInputStream
import java.lang
import os
import string

propInputStream = FileInputStream("domain.properties")
configProps = Properties()
configProps.load(propInputStream)

adminUser = configProps.get("admin.username")
adminPassword = configProps.get("admin.password")
checkInterval = configProps.get("check.interval")
totalServersToMonitor = configProps.get("total.number.of.servers")
checkingIntervalSeconds = int(checkInterval)

#############  This method would send the Alert Email  #################
def sendMailString():
	os.system('/bin/mailx -s  "ALERT: Check Server May Not Be RUNNING !!! Please check..." admin@company.com < serverState_file')
	print '*********  ALERT MAIL HAS BEEN SENT FOR SERVER STATE ***********'
	print ''

#############  Infinite Loop to check the Status of Server in Mentioned Interval  #################
while true:
	print 'Checking All Servers State Details'
	totalServers = int(totalServersToMonitor)
	i=1
	while i <= totalServers:
		disconnect()
		serverState=""
		serverName = configProps.get("server.name." + str(i))
		serverURL = configProps.get("server.url." + str(i))
		try:
			connect(adminUser,adminPassword,serverURL)
			serverRuntime()
			serverState=cmo.getState()
			print '-----------------', serverName , ' is in State: ', serverState
			if serverState != "RUNNING":
				today = Date()
				stateMessage = 'The ' + serverName + ' is In State ' + serverState + '  At Time: ' + today.toString()
				cmd = "echo " + stateMessage +" >> serverState_file"
				os.system(cmd)
		except:
			serverName=configProps.get("server.name." + str(i))
			print 'Sorry !!! Unable to Connect to Server ' , serverName
			today = Date()
			stateMessage = 'The ' + serverName + ' May Be DOWN.' + ' At Time: ' + today.toString()
			cmd = "echo " + stateMessage +" >> serverState_file"
			os.system(cmd)
		i =  i + 1

	sendMailString()
	cmd = "rm -f serverState_file"
	os.system(cmd)

	print 'Sleeping for ', int(checkingIntervalSeconds) , ' Seconds...'
	print ''
	interval=int(checkingIntervalSeconds)
	Thread.sleep(interval*1000)

#######################################################################

Step-4) Open a command prompt and then run the “setWLSEnv.cmd” or “setWLSEnv.sh” to set the CLASSPATH and PATH variables. Better you do echo %CLASSPATH% or echo $CLASSPATH to see whether the CLASSPATH is set properly or not. If you see an Empty Classpath even after running the “setWLSEnv.sh” then please refer to the Note mentioned at Step3) in the Following post: http://middlewaremagic.com/weblogic/?page_id=1492

Step-5) Now run the WLST Script in the same command prompt using the following command:

java   weblogic.WLST  serverStateChecker.py

You will see the following kind of results in the command prompt

Initializing WebLogic Scripting Tool (WLST) ...
$ java weblogic.WLST serverStateChecker.py

Initializing WebLogic Scripting Tool (WLST) ...

Welcome to WebLogic Server Administration Scripting Shell

Type help() for help on available commands

Checking All Servers State Details

You will need to be connected to a running server to execute this command

Connecting to t3://10.65.193.88:7001 with userid weblogic ...
This Exception occurred at Thu Feb 24 19:03:25 IST 2011.
javax.naming.CommunicationException [Root exception is java.net.ConnectException: t3://10.65.193.88:7001: Destination unreachable; nested exception is:
	java.net.ConnectException: Connection refused; No available router to destination]
	at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:40)
	at weblogic.jndi.WLInitialContextFactoryDelegate.toNamingException(WLInitialContextFactoryDelegate.java:783)
	at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:365)
	at weblogic.jndi.Environment.getContext(Environment.java:315)
	at weblogic.jndi.Environment.getContext(Environment.java:285)
.
.
.
.
Sorry !!! Unable to Connect to Server  AdminServer

You will need to be connected to a running server to execute this command

Connecting to t3://10.65.193.88:7003 with userid weblogic ...
Successfully connected to managed Server 'MS-1' that belongs to domain 'Test_Domain'.

Warning: An insecure protocol was used to connect to the
server. To ensure on-the-wire security, the SSL port or
Admin port should be used instead.

Location changed to serverRuntime tree. This is a read-only tree with ServerRuntimeMBean as the root.
For more help, use help(serverRuntime)

----------------- MS-1  is in State:  RUNNING
Disconnected from weblogic server: MS-1
Connecting to t3://10.10.10.10:7005 with userid weblogic ...
Successfully connected to managed Server 'MS-2' that belongs to domain 'Test_Domain'.

Warning: An insecure protocol was used to connect to the
server. To ensure on-the-wire security, the SSL port or
Admin port should be used instead.

----------------- MS-2  is in State:  ADMIN
*********  ALERT MAIL HAS BEEN SENT FOR SERVER STATE ***********

Sleeping for  10  Seconds...

NOTE: This script is using mailx (i.e. but Windows box does not have mailx utility) so please do check if your mailx is configured properly or else script would run properly but the mail would not be sent.

Email Alert Server State

Email Alert Server State

.
.

Regards,
Jay SenSharma

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