Apache Tomcat

Apache Tomcat

Apache Tomcat is an open-source implementation of the Java Servlet, JavaServer Pages, Java Expression Language and WebSocket technologies. Tomcat provides a "pure Java" HTTP web server environment in which Java code can run.

Available solutions




This template is for Zabbix version: 7.0

Source: https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/templates/app/tomcat_jmx?at=release/7.0

Apache Tomcat by JMX

Overview

This template is designed for the effortless deployment of Apache Tomcat monitoring by Zabbix via JMX and doesn't require any external scripts.

Requirements

Zabbix version: 7.0 and higher.

Tested versions

This template has been tested on:

  • Apache Tomcat 8.5.59

Configuration

Zabbix should be configured according to the instructions in the Templates out of the box section.

Setup

Metrics are collected by JMX.

  1. Enable and configure JMX access to Apache Tomcat. See documentation for instructions (chose your version).
  2. If your Tomcat installation require authentication for JMX, set values in host macros {$TOMCAT.USERNAME} and {$TOMCAT.PASSWORD}.
  3. You can set custom macro values and add macros with context for specific metrics following macro description.

Macros used

Name Description Default
{$TOMCAT.USER}

User for JMX
{$TOMCAT.PASSWORD}

Password for JMX
{$TOMCAT.LLD.FILTER.REQUEST_PROCESSOR.MATCHES}

Filter for discoverable global request processors.

 .*
{$TOMCAT.LLD.FILTER.REQUEST_PROCESSOR.NOT_MATCHES}

Filter to exclude global request processors.

 CHANGE_IF_NEEDED
{$TOMCAT.LLD.FILTER.MANAGER.MATCHES}

Filter for discoverable managers.

 .*
{$TOMCAT.LLD.FILTER.MANAGER.NOT_MATCHES}

Filter to exclude managers.

 CHANGE_IF_NEEDED
{$TOMCAT.LLD.FILTER.THREAD_POOL.MATCHES}

Filter for discoverable thread pools.

 .*
{$TOMCAT.LLD.FILTER.THREAD_POOL.NOT_MATCHES}

Filter to exclude thread pools.

 CHANGE_IF_NEEDED
{$TOMCAT.THREADS.MAX.PCT}

Threshold for busy worker threads trigger. Can be used with {#JMXNAME} as context.

 75
{$TOMCAT.THREADS.MAX.TIME}

The time during which the number of busy threads can exceed the threshold. Can be used with {#JMXNAME} as context.

 5m

Items

Name Description Type Key and additional info
Version

The version of the Tomcat.

 JMX agent jmx["Catalina:type=Server",serverInfo]

Preprocessing

  • Discard unchanged with heartbeat: 1d

Triggers

Name Description Expression Severity Dependencies and additional info
Apache Tomcat: Version has been changed

The Tomcat version has changed. Acknowledge to close the problem manually.

 last(/Apache Tomcat by JMX/jmx["Catalina:type=Server",serverInfo],#1)<>last(/Apache Tomcat by JMX/jmx["Catalina:type=Server",serverInfo],#2) and length(last(/Apache Tomcat by JMX/jmx["Catalina:type=Server",serverInfo]))>0 Info Manual close: Yes

LLD rule Global request processors discovery

Name Description Type Key and additional info
Global request processors discovery

Discovery for GlobalRequestProcessor

 JMX agent jmx.discovery[beans,"Catalina:type=GlobalRequestProcessor,name=*"]

Item prototypes for Global request processors discovery

Name Description Type Key and additional info
{#JMXNAME}: Bytes received per second

Bytes received rate by processor {#JMXNAME}

 JMX agent jmx[{#JMXOBJ},bytesReceived]

Preprocessing

  • Change per second
{#JMXNAME}: Bytes sent per second

Bytes sent rate by processor {#JMXNAME}

 JMX agent jmx[{#JMXOBJ},bytesSent]

Preprocessing

  • Change per second
{#JMXNAME}: Errors per second

Error rate of request processor {#JMXNAME}

 JMX agent jmx[{#JMXOBJ},errorCount]

Preprocessing

  • Change per second
{#JMXNAME}: Requests per second

Rate of requests served by request processor {#JMXNAME}

 JMX agent jmx[{#JMXOBJ},requestCount]

Preprocessing

  • Change per second
{#JMXNAME}: Requests processing time

The total time to process all incoming requests of request processor

{#JMXNAME}

 JMX agent jmx[{#JMXOBJ},processingTime]

Preprocessing

  • Custom multiplier: 0.001

LLD rule Protocol handlers discovery

Name Description Type Key and additional info
Protocol handlers discovery

Discovery for ProtocolHandler

 JMX agent jmx.discovery[attributes,"Catalina:type=ProtocolHandler,port=*"]

Item prototypes for Protocol handlers discovery

Name Description Type Key and additional info
{#JMXVALUE}: Gzip compression status

Gzip compression status on {#JMXNAME}. Enabling gzip compression may save server bandwidth.

 JMX agent jmx[{#JMXOBJ},compression]

Preprocessing

  • Discard unchanged with heartbeat: 1h

Trigger prototypes for Protocol handlers discovery

Name Description Expression Severity Dependencies and additional info
Apache Tomcat: {#JMXVALUE}: Gzip compression is disabled

gzip compression is disabled for connector {#JMXVALUE}.

 find(/Apache Tomcat by JMX/jmx[{#JMXOBJ},compression],,"like","off") = 1 Info Manual close: Yes

LLD rule Thread pools discovery

Name Description Type Key and additional info
Thread pools discovery

Discovery for ThreadPool

 JMX agent jmx.discovery[beans,"Catalina:type=ThreadPool,name=*"]

Item prototypes for Thread pools discovery

Name Description Type Key and additional info
{#JMXNAME}: Threads count

Amount of threads the thread pool has right now, both busy and free.

 JMX agent jmx[{#JMXOBJ},currentThreadCount]

Preprocessing

  • Discard unchanged with heartbeat: 10m
{#JMXNAME}: Threads limit

Limit of the threads count. When currentThreadsBusy counter reaches the maxThreads limit, no more requests could be handled, and the application chokes.

 JMX agent jmx[{#JMXOBJ},maxThreads]

Preprocessing

  • Discard unchanged with heartbeat: 10m
{#JMXNAME}: Threads busy

Number of the requests that are being currently handled.

 JMX agent jmx[{#JMXOBJ},currentThreadsBusy]

Trigger prototypes for Thread pools discovery

Name Description Expression Severity Dependencies and additional info
Apache Tomcat: {#JMXNAME}: Busy worker threads count is high

When current threads busy counter reaches the limit, no more requests could be handled, and the application chokes.

 min(/Apache Tomcat by JMX/jmx[{#JMXOBJ},currentThreadsBusy],{$TOMCAT.THREADS.MAX.TIME:"{#JMXNAME}"})>last(/Apache Tomcat by JMX/jmx[{#JMXOBJ},maxThreads])*{$TOMCAT.THREADS.MAX.PCT:"{#JMXNAME}"}/100 High

LLD rule Contexts discovery

Name Description Type Key and additional info
Contexts discovery

Discovery for contexts

 JMX agent jmx.discovery[beans,"Catalina:type=Manager,host=,context="]

Item prototypes for Contexts discovery

Name Description Type Key and additional info
{#JMXHOST}{#JMXCONTEXT}: Sessions active

Active sessions of the application.

 JMX agent jmx[{#JMXOBJ},activeSessions]
{#JMXHOST}{#JMXCONTEXT}: Sessions active maximum so far

Maximum number of active sessions so far.

 JMX agent jmx[{#JMXOBJ},maxActive]
{#JMXHOST}{#JMXCONTEXT}: Sessions created per second

Rate of sessions created by this application per second.

 JMX agent jmx[{#JMXOBJ},sessionCounter]

Preprocessing

  • Change per second
{#JMXHOST}{#JMXCONTEXT}: Sessions rejected per second

Rate of sessions we rejected due to maxActive being reached.

 JMX agent jmx[{#JMXOBJ},rejectedSessions]

Preprocessing

  • Change per second
{#JMXHOST}{#JMXCONTEXT}: Sessions allowed maximum

The maximum number of active Sessions allowed, or -1 for no limit.

 JMX agent jmx[{#JMXOBJ},maxActiveSessions]

Feedback

Please report any issues with the template at https://support.zabbix.com

You can also provide feedback, discuss the template, or ask for help at ZABBIX forums

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