Jolokia - JMX on CapsaicinRoland Huß

Chili-HeadConSol* Software GmbH

Me and the Chili

• Development and Operations @ ConSol– Large Java Projects– Remote Operations– Open Source Monitoring (Nagios)– www.consol.com

• Open Source Author– roland@cpan.org– https://github.com/rhuss

• Chili grower since 2005

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JMXJSR-3

JSR-160The Problem

JMX Refresher

• Java Management Extensions (JMX)• JSR-3 (2000)• Available out of the box since JDK 1.5• JMX-Operations:

– Attribute reading– Attribute writing– Execution of operations– Notifications

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JMX Architecture

JMX Remote API

• JSR-160 (2003)• Problems:

– Firewalls– Security is typically „all-or-nothing“– Strongly typed– Java only

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OverviewFeatures

ClientsTools

Jolokia

How it works

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Agents

JEE OSGi Mule JVM

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Tested on ...

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Tomcat 5.5, 6.0, 7.0

Jetty 5.1, 6.1, 7.5, 8.0

Weblogic 9.2.3, 10.0.2, 10.3.5

Websphere 6.1, 7.0, 8.0

Glassfish 2.1, 3.0, 3.1

JBoss 4.2, 5.1, 6.1, 7.0

Jonas 4.10, 5.1, 5.2

Geronimo 2.1, 2.2, 3.0 M1

Camel 2.8

Felix 2.0, 3.2, 4.0

Equinox 3.5, 3.6, 3.7, 3.8 M1

Knopflerfish 3.2

Virgo 2.1, 3.0

Spring dm Server 2.0

Mule 2.2, 3.1, 3.2

ActiveMQ 5.5

Terracotta 3.2

Hadoop 0.20

Quickstart

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• HTTP POST

read/http://localhost/jolokia/

Request

• HTTP GET

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{ "type":"read", "mbean":"java.lang:type=Memory", "attribute":"HeapMemoryUsage" }

java.lang:type=Memory/HeapMemoryUsage

Response

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{ "value": { "init": 134217728, "max": 532742144, "committed": 133365760, "used": 19046472 }, "status": 200, "timestamp": 1244839118, "request": { "mbean": "java.lang:type=Memory", "type": "read", "attribute": "HeapMemoryUsage" } }

Request Types

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version Version and server information

read Reading of attributes

write Writing of attributes

exec Execution of operations

search Pattern search for MBeans

list MBean meta data

Bulk Requests

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[ { "type" : "read", "mbean" : "java.lang:type=Memory", "attribute" : "HeapMemoryUsage", "path" : "used", }, { "type" : "search", "mbean" : "*:type=Memory,*" }]

JSR-160 Proxy

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Proxy Request

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{ "attribute" : "HeapMemoryUsage", "mbean" : "java.lang:type=Memory", "target": { "url" : "service:jmx:iiop://websphere:2810/jndi/JMXConnector" "user" : "roland", "password" : "s!cr!t" }, "type" : "READ"}

Security

• JSR-160 Security– Java Security and JAAS

• Jolokia Security– HTTP Security– Access Control with Policy Files

• Network location• Command types• MBean, attribute and operation names

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Groovy

Scala

.....

You ?

Clients

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Perl Jmx4Perl

Javascript Jolokia

Java Jolokia

Python Jmx4Py Jürgen Herrmann

Node.js jolokia-client Joachim Kainz

Javascript Demo

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Javascript

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var j4p = new Jolokia("/jolokia"); var data = [];

function run() { j4p.request({ type: "read", mbean: "java.lang:type=Memory", attribute: "HeapMemoryUsage" }, { success: function(resp) { data.push([resp.timestamp,resp.value.used]); $.plot($("#memory"),[data],{ xaxis: { mode: "time" }}); setTimeout(run,1000); } }); } run();

Tools

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jmx4perl CLI Tool

check_jmx4perl Nagios Plugin

cacti_jmx4perl Cacti Plugin

j4psh JMX Shell

AccessJ iPhone Client

Roo Addon Spring Roo Addon

j4psh

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Wrap up

• JMX is good• JSR-160 connectors are bad • Jolokia ...

... is a JSON-HTTP adaptor to JMX ... has unique features ... allows for non-Java clients ... has good tool support

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Resources

• www.jolokia.org• Reference-Manual: http://www.jolokia.org/reference/html/• Forum: http://www.jolokia.org/forum.html

• Blog• ConSol Labs: http://labs.consol.de

• Github• https://github.com/rhuss/jolokia

• T-Shirts ;-)• http://jolokia.spreadshirt.de

• Twitter: @jolokia_jmx25

Questions ?