puppetconf 2013 types and providers

Puppet Types and Providers Dan Bode One man comedy routine | BodeCo @bodepd

Nan Liu Outsourced Intern

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•  Resource Behavior and Terminology •  Resource Development

– Type – Providers

•  … (Dan’s Secret) •  Profit !!!

Overview

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•  How it works •  Type •  Providers

Resource

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How it works?

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•  How to identify a unique resource •  Commands to manage resource

–  Inspect current state – Configure desire state

Prereqs

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•  Title (namevar) – uuids and guids – satisfy unique constraint – composite namevar

•  Attributes – Properties – Parameters

•  Metaparameters

Resource

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•  Have desire state •  Preferably only two

– present/absent –  running/stopped

•  Overloading – version

Ensurable Resource

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service { “sshd”: ensure => ‘running’, enable => true, require => Package[‘ssh’], tag => ‘PuppetConf’, }

Resource Example

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/etc/init.d/sshd start/stop/status/restart service sshd start/stop/status/restart smf ?

Commands

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Type

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•  Type (single) – Describes resources attributes – What you write as Puppet manifests

•  Provider (many) – Query state – Configure resource

Separation of Responsibility

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•  Type •  Namevar

Type

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•  exists? •  create •  destroy

Ensurable

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•  exists? •  install •  uninstall

Override ensurable

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•  install_options •  remove_options •  version

Parameters

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•  version •  Property vs. Parameter

Problems?

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•  getter •  setter

Property

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•  Get all instance of resource •  mk_resource_methods

self.instances

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•  confine •  defaultfor

Provider constraints

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•  Not a hard relationship

Autorequire

Thank You Nan Liu Sr Systems Engineer | VMware @sesshin