Chef: Why you should automate your web infrastructure by Kate Heddleston

Transcript

1. Chef: Why you should automate your web infrastructure.
2. Hi I'm Kate Heddleston @heddle317 kate.heddleston@gmail.com https://github.com/heddle317/django-chef-application
3. Here's what I'm going to talk to you about. • Why you should automate your web infrastructure. • What is Chef? • How to use Chef to set-up a python/Django project.
4. A Programmer's Better Best Friend
5. Why you should automate your web infrastructure. • All of your configuration information is in one place (and that place isn't someone's head) • You can spin up perfectly configured servers instantly! • You can change things in one place and have them propagate through your entire system • You can create dev and test environments that are exact replicas of production.
7. LB FE AS AS DB slave sentry nagios graph FE FE
9. FE AS DB FE AS DB
10. PostgreSQL Celery NginX Rabbit MQ Python
11. What is Chef? "Reality-based automation for the cloud." "Infrastructure as code." "A global view of your system as opposed to a local one."
12. Terminology
13. Chef Server • central storage for all your chef configuraions • stores all your git repo stuff as structured data in json • uses couchDB for storage and querying • Hosted Chef free for up to 5 nodes - then you should host it yourself Chef Server
14. Knife Command line tool to interface between your local code repo and your Chef Server
15. Nodes servers in your system LB FE FE FE
16. Roles • A nice way of abstracting what a node does and what should be installed on it. I.e. a webserver role vs. a database role • run_list of installations • Can talk about other machines in your infrastructure by their role; open up firewalls to front-end servers • You can query roles
17. Cookbooks • The base unit of configuration, so you would have a cookbook for nginx, postgres, gunicorn, etc.
18. Recipes • ruby programs that get run when installing that cookbook
19. Chef Server
20. Chef Server Hosting Provider knife knife plugin
22. knife cookbook site download nginx ohai postgresql gunicorn git python screen
24. Chef Server knife cookbook upload django-application
26. Chef Server knife role from file webserver.json
27. What exactly happens when I run this command? knife rackspace server create -r 'role[webserver]' -N chef.myserver.org -S chef.myserver.org -f 3 -I 125
28. Hosting Provider chef-client knife rackspace... chef bootstrap
29. Go see console output!
30. • You really, really, really, really should use something for server configuration • Getting started with your Django server ◦ https://github.com/heddle317/django-chef-application To sum it all up...
31. Other tools like Chef • Heroku ◦ "Like having two full-time dev ops people on your team." • Puppet ◦ http://bitfieldconsulting.com/puppet-vs-chef • Salt ◦ this one is in python, but it's new
32. No developers were harmed in the making of this presentation... John Lynn Robert MacCloy Adam DePue Hearsay Social
33. Links to particularly interesting articles I found while making this presentation • http://version2beta.com/articles/dev- environments-with-vagrant-chef-and-git/ • http://devopsanywhere.blogspot. com/2011/10/puppet-vs-chef-fight.html • http://en.wikipedia. org/wiki/Comparison_of_open_source_confi guration_management_software
34. Questions? You can also find me in the hallways OR At the Hearsay Social beer bash: 6-8pm at David's 5151 Stars and Stripes Dr.