introducing ganglia

GANGLIA MONITORING SYSTEM

JULY 2013

Anu Bhaskar www.anubhaskar.name

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1.Introduction2.Ganglia Architecture3.Prototype Architecture4.Install & configure gmond5.Install & configure gmetad6.Install and configure web front7.Explore metrics in web front

AGENDA

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1.BSD Licensed2.Monitoring system3.Distributed4.Scalable5.XML for data representation, XDR for data transport, and RRDtool for data storage and visualization

6.Remotely view historical or live statistics

INTRODUCTION

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GANGLIA ARCHITECTURE

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Monitored Node(gmond)

Meta node(gmetad + web)

Web Front end Users

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PROTOTYPE ARCHITECTURE

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sender1(gmond)

Centos6/10.10.10.3

sender2(gmond)

Centos6/10.10.10.4

collector(gmetad + web)

Centos6/10.10.10.5

Web Front end Users

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Install epel repositories in sender1 and sender 2# rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release- 6-8.noarch.rpm

Install gmond in sender1 and sender2# yum install ganglia-gmond

Configure gmond in sender1 and sender2# vi /etc/ganglia/gmond.confcluster { name = “group1”

Start gmond service in sender1 and sender2# service gmond start# netstat –ntlp | grep gmond

INSTALL & CONFIGURE GMOND

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Install epel repository in collector# rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release- 6-8.noarch.rpm

Install rrdtool in collector# yum install rrdtool

Install gmetad in collector# yum install ganglia-gmetad

Configure gmetad in collector# vi /etc/ganglia/gmetad.confdata_source “group1” sender1:8649 sender2:8649

Start gmetad service in collector# service gmetad start# netstat -ntlp | grep gmetad

INSTALL & CONFIGURE GMETAD

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Install Apache webserver in collector# yum install httpd# vi /etc/httpd/conf/httpd.confServerName collector:80

Install php in collector# yum install php

Create a php script to test php webserver module in collector# vi /var/www/html/info.php<?phpphpinfo();?>

Start webserver in collector# service httpd start

INSTALL AND CONFIGURE WEB FRONT END

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Test the php module by browsing to the url http://collector/info.php

Install ganglia web frontend in collector# yum install ganglia-web

Copy web files to web server directory# cp -pr /usr/share/ganglia /var/www/html/# cd /var/www/html/ganglia# rm conf.php # ln -s /etc/ganglia/conf.php conf.php# rm private_clusters# ln -s /etc/ganglia/private_clusters private_clusters

Remove ganglia access restrictions in webserver (only for this demo, not recommended for production)# rm /etc/httpd/conf.d/ganglia.conf

INSTALL AND CONFIGURE WEB FRONT END

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Access ganglia web# http://collector/ganglia/

Load cpu of sender1 using below commend and view its cpu metric for last hour# cat /dev/zero > /dev/null

EXPLORE METRICS IN WEB FRONT END

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