Puppet

Transcript

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   Puppet Salimane Adjao Moustapha Salimane.moustapha@meltwater.com salimane.com

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   • Web app depends on services that should be on

   the server, users access/permissions... • Capistrano expects folders, rvm to be in a certain location • You need to deploy many servers with different environments on staging, production... • Doing all that manually and you're setting yourself for “wtf!wtf! wtf!”...
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   The idea is to make it repeatable, predictable and testable

   with less moving parts...
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   Insert Puppet... • Configuration management framework and tools • Ruby

   based • GPLv2/Apache licenses • From PuppetLabs (company)
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   • Deployment • Config Language and Resource Abstraction • Transactional

   Layer
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   Deployment • Master – Run as daemon – Listen on

   a port – Serve configuration catalogs • Agent – Connect to master via ssh – Retrieve configuration catalog from master – Can run as a daemon or manually triggered • Puppet can also run in stand alone mode
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   Config language/ Resource Abstraction file { ['/meltwater', '/meltwater/likealyzer']: ensure =>

   directory, owner => 'www-data', group => 'www-data', mode => '0644', require => User['www-data'], }
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   Transactional layer • Agent uses facter to get details about

   itself • Agent send “facts” to Master • Master recognize, compile configuration “catalog” for that agent and send it back • Agent apply the “catalog” on itself then send a result report back
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   Configuration • Node Definition • Resource Definition • Module Definition

   • ...
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    Node definition node puppet-demo { file { ['/meltwater', '/meltwater/likealyzer']: ensure

    => directory, owner => 'vagrant', group => 'vagrant', mode => '0644' } }
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    Resource Definition type { name: attribute => value, } package

    { 'vim': ensure => present }
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    Module Definition • mymodule – files – templates – tests

    – spec • spec_helper.rb – manifests • init.pp
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    Demo time

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    Questions