Puppet users - Oct 2012 - Best way to set environment variables in production server with puppet

Hi, 

I''m using puppet to setup a JRuby environment on my production and
staging
EC2 servers using Ubuntu Linux. I''m using a puppet recipe (is recipe
the
right term?) to install jruby.

I want to set a environment variable (in this case, JRUBY_HOME and modify 
the PATH to include JRUBY_HOME/bin) after it finishes installing jruby
Here''s a gist with the recipe''s content:

https://gist.github.com/3890519

So, what''s the best way to add /opt/jruby as JRUBY_HOME and then add 
JRUBY_HOME/bin to PATH?  

Regards,

Rubem Azenha

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On Sunday, October 14, 2012 9:31:38 PM UTC-5, Rubem Azenha
wrote:
>
> Hi, 
>
> I''m using puppet to setup a JRuby environment on my production and
staging
> EC2 servers using Ubuntu Linux. I''m using a puppet recipe (is
recipe the
> right term?) to install jruby.
>
> I want to set a environment variable (in this case, JRUBY_HOME and modify 
> the PATH to include JRUBY_HOME/bin) after it finishes installing jruby
> Here''s a gist with the recipe''s content:
>
> https://gist.github.com/3890519
>
> So, what''s the best way to add /opt/jruby as JRUBY_HOME and then
add
> JRUBY_HOME/bin to PATH?  
>
You have a critical misunderstanding here that informs the available 
solutions.  Environment variables do not float about in the aether; they 
are called "environment variables" because they are associated with 
specific environments.  So the first question to answer is *which 
environments* need those variables?

Supposing you mean that you want all users'' default shell environments
to
have those variables by default, you should follow the conventions of your 
OS distribution.  RedHat-family Linux distros, for instance, drop shell 
setup files in /etc/profile.d.  On one of those distros you might therefore 
create /etc/profile.d/juby.sh and /etc/profile.d/juby.csh with the needed 
environment variable declarations for Bourne and C shell family shells, 
respectively.  Those files will be ''source''d by
users'' login shells.

Really, though, everything you''re doing ought to be rolled into a
package.
If there isn''t already one available for you then consider creating one
and
putting it in your own repository.  It''s not that hard.


John

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