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samengr · #1 (**permalink**) 10-22-2009, 10:06 PM

Hi,

I am using tomcat version 5.5.9 and nagios for monitoring services and harware resources in my office environment. Can someone help me to monitor tomcat status remotely from nagios server? Is tomcat up or down and throw email if tomcat is down? I know there isnt any builtin pluggin so probably it would be like to write a script and then get its out put.

we can check the status of tomcat in many ways like

1. $ ps fax | grep tomcat | grep Djav

or

2. netstat -ltn | grep 8085
note: my tomcat is listening on 8085.

So any suggestion how to integrate it with nagios?

Many thanks in advance.

Sam.

jaysunn · #2 (**permalink**) 10-22-2009, 11:02 PM

Hello,

You can easily achieve this with the default nagios check_http plugin. This plugin ships with the nagios install.

What you need to do is define a check like this. Below is the usage:

Code:

check_http -H hostname -p 8085 -w 4 -c 10

Here is the actual command defined for you:

Code:

define command{
command_name    Check_Http_Tomcat
command_line    $USER1$/check_http -H hostname -p 8085  -w 4 -c 10
}

Code:

[root@radio5 nagios]# ./check_http -H hostname -w 4 -c 10
OK - HTTP/1.1 302 Found - 0.003 second response time |time=0.002857s;4.000000;10.000000;0.000000 size=563B;;;0
[root@radio5 nagios]#

Code:

Usage: check_http -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]
       [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]
       [-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]
       [-s string] [-l] [-r <regex> | -R <case-insensitive regex>] [-P string]
       [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>] [-A string]
       [-k string] [-S] [-C <age>] [-T <content-type>]
NOTE: One or both of -H and -I must be specified

samengr · #3 (**permalink**) 10-23-2009, 04:24 PM

Quote:

Originally Posted by jaysunn

Hello,

You can easily achieve this with the default nagios check_http plugin. This plugin ships with the nagios install.

What you need to do is define a check like this. Below is the usage:

Code:

check_http -H hostname -p 8085 -w 4 -c 10

Here is the actual command defined for you:

Code:

define command{
command_name    Check_Http_Tomcat
command_line    $USER1$/check_http -H hostname -p 8085  -w 4 -c 10
}

Code:

[root@radio5 nagios]# ./check_http -H hostname -w 4 -c 10
OK - HTTP/1.1 302 Found - 0.003 second response time |time=0.002857s;4.000000;10.000000;0.000000 size=563B;;;0
[root@radio5 nagios]#

Code:

Usage: check_http -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]
       [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]
       [-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]
       [-s string] [-l] [-r <regex> | -R <case-insensitive regex>] [-P string]
       [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>] [-A string]
       [-k string] [-S] [-C <age>] [-T <content-type>]
NOTE: One or both of -H and -I must be specified

Thanks forr your reple mate. I had configured it before checking this email spent my more than 1 hour to do this

wich i could check it before

. Just a quick check what does it mean by "-w 4 -c 10" here? I know w is for warning and c is for critical but 4 and 10 couldnt understand it.

Thanks anyway.

jaysunn · #4 (**permalink**) 10-23-2009, 05:16 PM

Hello My Friend,

Quote:

Just a quick check what does it mean by "-w 4 -c 10" here? I know w is for warning and c is for critical but 4 and 10 couldnt understand it.

Please see below:

Code:

[root@radio5 nagios]# ./check_http -H hostname -w 4 -c 10
OK - HTTP/1.1 302 Found - 0.003 second response time |time=0.002857s;4.000000;10.000000;0.000000 size=563B;;;0
[root@radio5 nagios]#

Please note the red font change. This is where you will get your answer. This is the time that the plugin took to get a response / ping reply from the host. As you said, if the threshold is above 4.000000 it throughs a warning. If above 10,000000 it throughs critical.

My test gave a time=0.002857s Which gave the OK flag.

HTH,

Jaysunn

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Tomcat status monitoring with Nagios

Tomcat status monitoring with Nagios

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