[chef] Re: Running two applications in the same node using application cookbook

[Joshua Timberman < >]

Hello,


On Apr 25, 2012, at 4:26 PM, Daniel Cukier wrote:

> Is it possible to run 2 applications in the same node using the application 
> cookbook?
> 
> I have tried to do it by adding two roles of two different applications to 
> the same node. Both roles are based on the application cookbook.
> 
> But just one of the applications is being installed.


It is not currently possible because of the way the application::default 
recipe works and how Chef de-duplicates recipes. 

The application::default recipe does an "include_recipe" for each recipe 
relevant to the application being managed, so if you have two apps that 
should be rails + unicorn, it does this:

    # app1
    include_recipe "application::rails"
    include_recipe "application::unicorn"

    # app2
    include_recipe "application::rails"
    include_recipe "application::unicorn"

However, the second app, Chef will say[0] "not including recipe 
application::rails because I have already seen it.

The solution to this problem is address by implementing "application" as a 
lightweight resource, and is the work done primarily by Noah and Andrea for 
COOK-634[1][2]. The cookbooks for this work will be released by Opscode at 
some point soon; the more people we get testing the code the better, and the 
sooner we can release. They're probably beta quality right now, though I 
believe that the existing recipes will remain backwards compatible for a 
couple months after release.


[0]: you can see the messages with -l debug
[1]: https://github.com/andreacampi/application/tree/COOK-634
[2]: http://lists.opscode.com/sympa/arc/chef/2012-04/msg00329.html

-- 
Opscode, Inc
Joshua Timberman, Technical Program Manager
IRC, Skype, Twitter, Github: jtimberman