How to be a Chef (Developer Edition)

How to be a Chef(Developer Edition)

Rodrigo AyalaDeveloper

sábado, 1 de junio de 13

@RodrigoAyala


(Web) Apps are a bunch of software interconnected in a nice way


But software lives on servers


And we can’t to play dumb with that


tions?


Cloud, or local server


Local server


Local server

Pros:


Local server

Pros:✓ You know where your data lives


Local server

Pros:✓ You know where your data lives✓ The equipment is yours and you can personalize as you want


Local server


Cons:


Local server


Cons:✓ You are responsible to give power and a good Tº to the server


Local server


Cons:✓ You are responsible to give power and a good Tº to the server✓ The environment should be able to support catastrophes. (TIER)


Local server


Cons:✓ You are responsible to give power and a good Tº to the server✓ The environment should be able to support catastrophes. (TIER)✓It needs a lot of configuration (and that needs a lot of time)


Cloud


Cloud

Pros:


Cloud

Pros:✓ You don’t need an huge initial investment to buy (expensive) servers


Cloud

Pros:✓ You don’t need an huge initial investment to buy (expensive) servers✓ You can dynamically create an IT architecture


Cloud


Cons:


Cloud


Cons:✓ If for any reason the cloud service is down, you can’t do anything but wait


Cloud


Cons:✓ If for any reason the cloud service is down, you can’t do anything but wait✓It needs a lot of configuration (and that needs a lot of time)


Cloud

IaaS PaaS


Cloud

IaaS PaaS

Infrastructure as a Service

✓Flexible✓Cheap


Cloud

IaaS PaaS

Platform as a Service

✓First deploy in just minutes✓You don’t have to worry about software updates


Cloud

IaaS PaaS

¿ ?


Configuration Management toolWritten in RubyOpen Source


88.3K lines of code7.497 commits

Since March 2008https://github.com/opscode/chef

* Metrics by http://www.ohloh.net/p/opscode-chef


https://github.com/opscode/chef

https://github.com/opscode/chef

http://www.ohloh.net/p/opscode-chef

http://www.ohloh.net/p/opscode-chef

Let’s see how it works


Chef


ChefChef Server

Chef Solo


Chef Server

Chef Client

Chef Client

Chef Client

Chef Server

(Repository)


Chef Solo

Forever Alone version


Chef Solo

Chef Solo Chef Solo Bootstraped


Let’s see how it works


Cookbookhttp://community.opscode.com/cookbooks

https://github.com/opscode-cookbooks


http://community.opscode.com/cookbooks

http://community.opscode.com/cookbooks



★ Java★ postgreSQL★ MySQL★ SELinux★ RVM★ etc

Cookbook


Recipes


Recipes

Are included on cookbooks

Written in Ruby

There are functions available as DSL

You can use ERB templates with Recipes


Resources

Used on recipes

Define actions that can be taken

There are functions available as DSL

Service, yum_package, execute or directory are a few examples of this

http://docs.opscode.com/chef/resources.html




template '/etc/sudoers' do source 'sudoers.erb' mode '0440' owner 'root' group platform?('freebsd') ? 'wheel' : 'root' variables( :sudoers_groups => node['authorization']['sudo']['groups'], :sudoers_users => node['authorization']['sudo']['users'], :passwordless => node['authorization']['sudo']['passwordless'], :include_sudoers_d => node['authorization']['sudo']['include_sudoers_d'], :agent_forwarding => node['authorization']['sudo']['agent_forwarding'], :sudoers_defaults => node['authorization']['sudo']['sudoers_defaults'] ) not_if { node[:some_value]}end

Recipe example


Run list


{ "run_list":[ "recipe[user]", "recipe[sudo]", "recipe[main::user]", "recipe[yum::epel]", "recipe[nginx]", "recipe[redis::server]", "recipe[build-essential]", "recipe[rvm::user]", "recipe[main]", "recipe[nginx_conf]", "recipe[main::nginx]", "recipe[main::dirs]" ] ],


Let’s cook!


How to start

$ gem install knife-solo$ gem install chef-solo

$ gem install chef


How to start

$ knife solo bootstrap user@ipnumber nodes/ip.json -i pemfile.pem


mailto:[email protected]

mailto:[email protected]

https://github.com/opscode/chef-repo

Empty cookbook




“Bundler” for Chef

https://github.com/applicationsonline/librarian-chef


https://github.com/applicationsonline/librarian-chef.git

https://github.com/applicationsonline/librarian-chef.git

Gracias!


How to be a Chef (Developer Edition)

Technology

Transcript of How to be a Chef (Developer Edition)