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Chef introduction
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Wojciech Wnętrzak
December 05, 2011
Programming
6
350
Chef introduction
Presentation about
http://www.opscode.com/chef/
Wojciech Wnętrzak
December 05, 2011
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Transcript
Introduction to "Chef" framework Silesian Ruby Users Group Wojciech Wn¦trzak
December 3, 2010
What Is Chef? Open Source (Apache License v. 2.0) Framework
Ruby Infrastructure conguration management tool
Chef Is Young Released on January 15th, 2009
Why To Use Chef? Only one administration guy in company?
Forces order in system Existing solutions for your problems Best practices
How To Use Chef? chef-client + chef-server chef-client + Opscode
Platform chef-solo
Chef Server Ruby gem (chef-server) Stores cookbooks Stores information about
nodes Accessbile by REST API
Chef Server Elements CouchDB stores node informations SOLR
data indexing RabbitMQ helps in indexing Merb API and web user interface
Chef Server Elements CouchDB stores node informations SOLR
data indexing RabbitMQ helps in indexing Merb API and web user interface That is lot of stu!
Opscode Platform Free plan (upto 5 nodes) Conguration step by
step Organizations and users managment
Chef Client Ruby gem (chef) Runs on machine that we
want to congure Communicates with chef server Authenticates using RSA keys
Server Clients
Chef Solo Part of chef gem Standalone run (without connecting
to server) Uses cookbooks from local tarballs
Simple Workow Write cookbook with recipe Upload it to chef
server Dene run list by: editing node on chef server passing JSON le to chef-client Run chef-client on desired machine
Cookbooks Cookbooks for Chef are like RubyGems for Ruby 1
1I couldn't nd author
Cookbook Skeleton
Example Attributes File set[:postgresql][:version] = "8.4" set[:postgresql][:dir] = "/etc/postgresql/{node[:postgresql][:version]}/main"
PostgreSQL Server Recipe include_recipe "postgresql::client" package "postgresql-{node[:postgresql][:version]}" do action :install
end template "{node[:postgresql][:dir]}/postgresql.conf" do source "postgresql.conf.erb" owner "postgres" group "postgres" mode "0600" end service "postgresql-{node[:postgresql][:version]}" do action :start end
Recipe Features include_recipe "postgresql::client" package "postgresql-{node[:postgresql][:version]}" service "postgresql" do service_name
"postgresql-{node[:postgresql][:version]}" supports :restart => true, :status => true action :nothing end template "{node[:postgresql][:dir]}/postgresql.conf" do source "postgresql.conf.erb" owner "postgres" group "postgres" mode "0600" notifies :restart, "service[postgresql]" end
Package Providers Apt Yum MacPorts
Package Providers Apt Yum MacPorts Many more
Supported Systems Debian Gentoo FreeBSD MacOSX Solaris
Supported Systems Debian Gentoo FreeBSD MacOSX Solaris Windows
Supported Systems Debian Gentoo FreeBSD MacOSX Solaris Windows And more
Resources2 package template le user execute script (bash, ruby, perl,
python, csh) http_request deploy 2http://wiki.opscode.com/display/chef/Resources
Resources2 package template le user execute script (bash, ruby, perl,
python, csh) http_request deploy Many more 2http://wiki.opscode.com/display/chef/Resources
Additional Tools - Ohai Released as a gem ohai
Collects system conguration/information Returns JSON
Additional Tools - Knife Part of chef gem Console tool
for chef server managment
Tips If using RVM, use rvmsudo for chef-client Take a
look at chef bootstrap3 Remember that Ruby (Chef) uses sh, not bash 3http://wiki.opscode.com/display/chef/Bootstrap+Chef+RubyGems+ Installation
Useful Links http://www.opscode.com/chef/ http://help.opscode.com/faqs/start/how-to-get-started http://cookbooks.opscode.com/ https://github.com/opscode/cookbooks
Thank You Questions?