Servers as Pets v.Servers as Cattle

Radamanthus Batnag

Saturday, October 12, 13

@radamanthusradamanthus@gmail.com

http://github.com/radamanthushttp://rad.batnag.org

Application Support Engineer at Engine Yard

Saturday, October 12, 13

http://www.slideshare.net/gmccance/cern-data-centre-evolution

CERN Data Center Evolution

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PetsSaturday, October 12, 13

PetsSaturday, October 12, 13

PetsSaturday, October 12, 13

Pets

• Pets are given names like pussinboots.cern.ch

• They are unique, lovingly hand raised and cared for

• When they get ill, you nurse them back to health

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CattleSaturday, October 12, 13

CattleSaturday, October 12, 13

Cattle

• Cattle are given names numbers like vm0042.cern.ch

• They are almost identical to other cattle

• When they get ill, you...

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...get another oneSaturday, October 12, 13

2004

JBoss SQLServer

Production

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2005

JBoss SQLServer

Production

JBoss SQLServer

Staging

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2007

JBoss SQLServer

Trinity Production

JBoss SQLServer

Trinity Staging

Apache/Mongrels PostgreSQL

Neo Staging

App1

PostgreSQL

Neo Production

App2

Cache

smtp

Intranet

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2010

app1 app2

db

Staging

JBos SQLSer

Trinity

app1

Production

app2 app3 app4

cache smtp db master db slave

app5 app6 app7 app8 app9 app10

admin solr1 solr2

app1 app2

db

New App Production

sphinx

app1

db

New App Staging

sphinx

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Engine Yard

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Engine YardSaturday, October 12, 13

Factory!Saturday, October 12, 13

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Provisioning Tools

• Puppet - http://puppetlabs.com/

• Chef - http://www.opscode.com/chef/

• Ansible - http://www.ansibleworks.com/

• DIY

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“Future application architectures should use Cattle but Pets with strong configuration management are viable

and still needed.”

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Credits• http://www.slideshare.net/gmccance/cern-data-centre-evolution

• http://eofdreams.com/data_images/dreams/cat/cat-07.jpg

• http://upload.wikimedia.org/wikipedia/commons/2/22/Turkish_Van_Cat.jpg

• http://www.freegreatpicture.com/cat/photo-1562

• http://www.collisiondetection.net/images/cow_herd.jpg

• http://imgc.artprintimages.com/images/art-print/bobby-haas-a-large-herd-of-cattle-being-driven-to-richer-grasslands_i-G-37-3731-7ZDZF00Z.jpg

• http://upload.wikimedia.org/wikipedia/en/a/aa/CattleRestrainedForSlaughter.jpg

• http://www.clker.com/cliparts/I/x/g/a/v/N/new-cow-hi.png

• http://d75822.medialib.glogster.com/media/ff/fff1da0084e911a530554eb577d29aefe31a0a6f0a16ecee8551d42bbae56227/factory-png.png

• https://www.digitalocean.com/community/articles/how-to-install-rails-and-nginx-with-passenger-on-ubuntu

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