Introduction to puppet
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This document provides an introduction to Puppet, an open source tool for configuration management. It discusses how Puppet addresses issues with manual configuration and scripting approaches by allowing infrastructure to be coded and version controlled. Puppet uses a master-agent model or can run in standalone mode, and components like Facter, the Puppet language, resources, manifests, classes and templates are explained. Resources are the building blocks for modeling system configurations, and manifests are Puppet programs. Classes describe parts of a system's identity. Templates allow dynamic configuration files. A catalog brings all components together, and learning resources are provided.
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![templates
puppet uses ruby erb templating system
file {'/etc/foo.conf':
ensure => file,
require => Package['foo'],
content => template('foo/foo.conf.erb'),
}](https://image.slidesharecdn.com/introductiontopuppet-130217124406-phpapp01/85/Introduction-to-puppet-13-320.jpg)
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- It provides ad-hoc command execution and setup facts gathering via SSH. Playbooks can target groups of servers to orchestrate complex multi-server tasks.
- Variables, templates, conditionals allow playbooks to customize configurations for different environments. Plugins support integration with cloud, monitoring, messaging tools.
- Ansible aims to reduce complexity compared
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Introduction to puppet
- 1. Introduction to Puppet Habeeb Rahman | [email protected] | [email protected]
- 2. pre puppet/config management era manual Installation login and perform installation/config changes ad hoc scripts/tools not scalable everyone solving same problems their own way boring
- 3. puppet era mature tools sharing opensource infrastructure as a code version controlled
- 4. what? Vanilla Server Your desired vanilla server apply puppet application server Before Transformation After
- 5. how? (1/2) master-agent mode puppet master puppet agent puppet agent puppet agent puppet agent (server 1) (server 2) (server 3) (server 'n')
- 6. how? (2/2) standalone mode puppet apply puppet (server 1)
- 7. components facter & facts puppet language resources manifests classes templates
- 8. facter & facts puppet uses facter to gather information about the host system
- 9. puppet language ● DSL ● ruby
- 10. resources ● the building blocks ● model system configurations ● built-in resources user { 'dave': ensure => 'present', home => '/home/dave', shell => '/bin/zsh' } ● puppet describe -s user
- 11. manifests puppet programs are called “manifests” file extension: .pp
- 12. classes ● describe one part of what makes up a system’s identity ● not object-oriented programming 'class'
- 13. templates puppet uses ruby erb templating system file {'/etc/foo.conf': ensure => file, require => Package['foo'], content => template('foo/foo.conf.erb'), }
- 14. how does it all fit together?
- 15. catalog
- 16. puppet help puppet describe prints help about puppet resource types, providers, and metaparameters puppet help <subcommand> help about puppet commands