Puppet

Puppet

Transcript

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

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2. ●
   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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3. The idea is to make it repeatable,
   predictable and testable with less
   moving parts...
   

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4. Insert Puppet...
   ●
   Configuration management framework and
   tools
   ●
   Ruby based
   ●
   GPLv2/Apache licenses
   ●
   From PuppetLabs (company)
   

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5. ●
   Deployment
   ●
   Config Language and Resource Abstraction
   ●
   Transactional Layer
   

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6. 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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7. 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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8. 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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9. Configuration
   ●
   Node Definition
   ●
   Resource Definition
   ●
   Module Definition
   ●
   ...
   

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10. Node definition
    node puppet-demo {
    file { ['/meltwater', '/meltwater/likealyzer']:
    ensure => directory,
    owner => 'vagrant',
    group => 'vagrant',
    mode => '0644'
    }
    }
    

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11. Resource Definition
    type { name:
    attribute => value,
    }
    package { 'vim':
    ensure => present
    }
    

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12. Module Definition
    ●
    mymodule
    – files
    – templates
    – tests
    – spec
    ●
    spec_helper.rb
    – manifests
    ●
    init.pp
    

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13. Demo time
    

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14. Questions
    

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