Chef

chef
conﬁguration management with
jeff wallace
jeff@evolvingweb.ca
Sunday, October 24, 2010

i suck
at titlesSunday, October 24, 2010

Conﬁguration Management
DrupalCamp NYC 8
http://www.ﬂickr.com/photos/acmace/4434408330/

Conﬁguration Management
DrupalCamp NYC 8
10 people...
http://www.ﬂickr.com/photos/acmace/4434408330/

Conﬁguration Management w/Chef
DrupalCampMTL 2010
http://www.ﬂickr.com/photos/cfso1952/3597279132/

Conﬁguration Management w/Chef
DrupalCampMTL 2010
11 people?
http://www.ﬂickr.com/photos/cfso1952/3597279132/

what the hell is
conﬁguration
management

server conﬁguration

code

code
*we’re all programers!

http://www.hunterhomesnh.com/gallery.php?var=1
blueprints for
your servers

http://www.ﬂickr.com/photos/theodevil/4278796647/
and the factory
to build it

what are
the tools
http://www.ﬂickr.com/photos/ontario_wanderer/3496185271/

started in 1993
written in C
Argonne National Laboratory
written in python

ﬁrst release in 2005
written in ruby
puppet DSL
similar to chef

http://www.ﬂickr.com/photos/28056346@N06/3025510447/
chef

http://www.ﬂickr.com/photos/28056346@N06/3025510447/
ﬁrst release in 2009
written in ruby
pure ruby DSL

quick run down

chef-clientruns on each machine

chef-servermanages each machine

chef-solosever and client all-in-one

every machine you
conﬁgure is a node

every machine you
conﬁgure is a node
*yeah more nodes!

nodes have attributes

$ ohai

$ ohai
*just a snippet

attributes can be
searched with solr
http://wiki.opscode.com/display/chef/Search

attributes can be
searched with solr
*nodes + searching ... is this a drupal site?
http://wiki.opscode.com/display/chef/Search

every node can be
assigned a role
myql server, apache server, both

every node has a run list
list of roles and recipes
applied in order

this is what chef manages
every node has a set of
resources

resource

*a resource has an action

*resources have attributes
*allow multiple actions

*resources can notify other resources

my.cnf.erb
*attributes

*can be overridden
*searchable
attributes

lots more: http://wiki.opscode.com/display/chef/Resources
*adds cronjob to crontab for www-data user

recipe

*group of resources
*run in order

cookbook

ﬁle resolution

some useful
examples for
drupalists

drush

git checkout

git checkout
branch

demo?

thanks!
jeff wallace
jeff@evolvingweb.ca
*questions and comments encouraged

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