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

Transcript

1. Chef: Why you should
   automate your web
   infrastructure.
   

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2. Hi I'm Kate Heddleston
   @heddle317
   kate.heddleston@gmail.com
   https://github.com/heddle317/django-chef-application
   

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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.
   

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4. A Programmer's Better Best Friend
   

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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.
   

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7. LB
   FE
   AS
   AS
   DB
   slave
   sentry
   nagios
   graph
   FE
   FE
   

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9. FE
   AS
   DB
   FE
   AS
   DB
   

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10. PostgreSQL
    Celery
    NginX
    Rabbit
    MQ
    Python
    

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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."
    

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12. Terminology
    

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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
    

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14. Knife
    Command line tool to interface between your local code
    repo and your Chef Server
    

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15. Nodes
    servers in your system
    LB
    FE FE
    FE
    

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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
    

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17. Cookbooks
    ● The base unit of configuration, so you would have a
    cookbook for nginx, postgres, gunicorn, etc.
    

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18. Recipes
    ● ruby programs that get run when installing that
    cookbook
    

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19. Chef Server
    

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20. Chef Server
    Hosting Provider
    knife
    knife
    plugin
    

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22. knife cookbook site download nginx
    ohai
    postgresql
    gunicorn
    git
    python
    screen
    

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24. Chef Server
    knife cookbook upload django-application
    

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26. Chef Server
    knife role from file webserver.json
    

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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
    

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28. Hosting
    Provider
    chef-client
    knife
    rackspace...
    chef bootstrap
    

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29. Go see console output!
    

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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...
    

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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
    

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32. No developers were harmed in the
    making of this presentation...
    John Lynn
    Robert MacCloy
    Adam DePue
    Hearsay Social
    

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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
    

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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.
    

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