Configuring tomcat to checkmk monitoring

Troubleshooting
1

Hi i m trying to configure the tomcat to checkmk .
But i am getting error as

  • cd /usr/lib/check_mk_agent/plugins
  • for skript in ‘./*’
  • is_valid_plugin ./mk_jolokia.py
  • pattern=’.dpkg-(new|old|temp)$’
  • [[ -f ./mk_jolokia.py ]]
  • [[ -x ./mk_jolokia.py ]]
  • [[ ! ./mk_jolokia.py =~ .dpkg-(new|old|temp)$ ]]
  • true
  • ././mk_jolokia.py
    ERROR: (‘Connection aborted.’, BadStatusLine("’’",))
    ERROR: (‘Connection aborted.’, error(111, ‘Connection refused’))
    <<<jolokia_info:sep(0)>>>
    tomcat90LB1^@ERROR^@(‘Connection aborted.’, BadStatusLine("’’",))
    <<<jolokia_info:sep(0)>>>
    tomcat90LB2^@ERROR^@(‘Connection aborted.’, error(111, ‘Connection refused’))
  • for skript in ‘[1-9]/’
  • is_valid_plugin ‘[1-9]/’
  • pattern=’.dpkg-(new|old|temp)$’
  • [[ -f [1-9]/ ]]
  • false
2

Please ignore error 111 , i m basically looking for ERROR: (‘Connection aborted.’, BadStatusLine(“’’”,))

3

From the start, what do you have done so far to monitor your tomcat instance?
I only see a error message what makes no sense.

4

Thanks for the reply , let me explain you here
as per mentioned in document The agent for Linux in detail
i have installed checkmk agent check-mk-agent-1.6.0p20-1.noarch.rpm on my centos7 instance.
service xinetd with config /etc/xinetd.d/check-mk
{
type = UNLISTED
port = 6556
socket_type = stream
protocol = tcp
wait = no
user = root
server = /usr/bin/check_mk_agent
only_from = 127.0.0.1 10.0.20.1 10.0.20.2 172.31.25.62
log_on_success =
disable = no
}

mk_jolokia.py i download and put under path /usr/lib/check_mk_agent/plugins/
Below is my jolokia config, for my tomcat which are running on ajp port 1117

cat /etc/check_mk/jolokia.cfg

instances = [
{
“port” : 1117,
“instance” : “tomcat90LB1”,
},
{
“port” : 2228,
“instance” : “tomcat90LB2”,
}
]

#-> check_mk_agent | less
<<<check_mk>>>
Version: 1.6.0p20
AgentOS: linux
Hostname: ip-172-31-40-234.us-west-2.compute.internal
AgentDirectory: /etc/check_mk
DataDirectory: /var/lib/check_mk_agent
SpoolDirectory: /var/lib/check_mk_agent/spool
PluginsDirectory: /usr/lib/check_mk_agent/plugins
LocalDirectory: /usr/lib/check_mk_agent/local
<<>>
<<>>
<<<jolokia_info:sep(0)>>>
tomcat90LB1^@ERROR^@(‘Connection aborted.’, BadStatusLine("’’",))

Let me know if you need any further information

5

It looks like that there is no Jolokia running on your server.
You followed the description how to deploy the Jolokia here?
https://jolokia.org/index.html

6

Hi Andreas

i able to solve it now, when i comment redirectPort=“1111” ,jolokia is working fine and showing in monitoring ,1111 is ssl port , i think there is some misconfiguration for ssl port ,willcheck further for this .

7

Hi Andreas

when i download and try to put below war in tomcat, i m getting http 400 error
https://search.maven.org/remotecontent?filepath=org/jolokia/jolokia-war/1.6.2/jolokia-war-1.6.2.war

am i suppose to do any changes here ?

8

Hi Anders
are we suppose to do any changes in the war file oj jolokia >=?
or it will work simply by putting in to webapps of tomcat?

9

I don’t think so. In my use cases i don’t administer the Tomcat servers but as far as i know you only have to deploy the Jolokia war.
On this page you have all the possible configuration options.
https://jolokia.org/reference/html/agents.html

10

Hi Andreas
thanks for the reply

11

Hi Team
can somebody please help .
currently i m configuring check_mk 1.6
we are running tomcat with ajp port 1117 and https port 1111 (we r not running any http port )


i just configured jolokia in my check_mk agent .
when i try to run mk_jolokia.py , getting below ERROR

<<<jolokia_info:sep(0)>>>
ERROR: (‘Connection aborted.’, BadStatusLine("’’",))
tomcatERROR(‘Connection aborted.’, BadStatusLine("’’",))

netstat -tulnp | grep -i 1111
tcp6 0 0 :::1111 :::* LISTEN 21701/java
etstat -tulnp | grep -i 1117
tcp6 0 0 :::1117 :::* LISTEN 21701/java

my jolokia config file is as below
instances = [
{
“port” : 1117,
“instance” : “tomcatA1”,
}
]

12

<<jolokia_info:sep(0)>>>
ERROR: (‘Connection aborted.’, BadStatusLine("’’",))
tomcatERROR(‘Connection aborted.’, BadStatusLine("’’",))
<<<jolokia_info:sep(0)>>>
ERROR: HTTP STATUS: 400
tomcatERROR(‘HTTP STATUS’, 400)

my jolokia config file is as below
instances = [
{
“port” : 1117,
“instance” : “tomcatA1”,
},
{
“port” : 1111,
“instance” : “tomcatA1”,
}
]

13

First you can test with a normal browser or tools like curl if the jolokia is answering on the configured port.

curl -k https://localhost:1111/jolokia/version

The output should be a status line in json syntax.

14

Hi Andreas

Its working now , thanks for the reply

15

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