Puppet users - Dec 2012 - Puppet with dedicated ruby install

Are there any good guides out there to using Puppet agents with a 
dedicated, separate ruby install?  Our apps are all Ruby based and require 
different versions than Puppet.  Installing the agent from a package will 
override our ruby installs.

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On Wed, Dec 12, 2012 at 12:54 PM, Alexander Philipp
<alex.philipp2@gmail.com> wrote:
> Are there any good guides out there to using Puppet agents with a
dedicated,
> separate ruby install?  Our apps are all Ruby based and require different
> versions than Puppet.  Installing the agent from a package will override
our
> ruby installs.
Just a note that this is one of the features of Puppet Enterprise. It
is setup with it''s own Ruby.

You can certainly do this too.  I am not aware of guides though.
>
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Hi Alexander!

On Wed, Dec 12, 2012 at 12:54:56PM -0800, Alexander Philipp
wrote:
> Are there any good guides out there to using Puppet agents with a 
> dedicated, separate ruby install?  Our apps are all Ruby based and require 
> different versions than Puppet.  Installing the agent from a package will 
> override our ruby installs.
We do this the other way around. Puppet runs on system ruby (Ubuntu''s
Ruby 1.8) while the apps have their dedicated rvm-setup.

Cheers,
Matthias Viehweger
- -- 
Serververwaltung und Softwareentwicklung
 
https://www.heute-kaufen.de
Prinzessinnenstraße 20 - 10969 Berlin
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I''ve done this using gems.  I build Ruby from source (I use --prefix
but
not sure if it''s required) and then use the new gem executable to
install
Puppet as gem.  Works great for me if you can use gems

BTW, I did this because we use CentOS 5 and I wanted to use Ruby 1.9.x + 
Puppet 3.x and had too much trouble trying every other method.  I also go 
one more step and build an RPM out of the new Ruby including it''s gems.
and
distribute that to clients as a ruby+puppet package.

I asked a similar question before:
https://groups.google.com/d/topic/puppet-users/jRE97JXZqgQ/discussion

I couldn''t figure out how to make Puppet use my custom Ruby and so
tried
out this gem method.  I''d love to hear if anyone else figures out
another
method.


On Wednesday, December 12, 2012 12:54:56 PM UTC-8, Alexander Philipp
wrote:
>
> Are there any good guides out there to using Puppet agents with a 
> dedicated, separate ruby install?  Our apps are all Ruby based and require 
> different versions than Puppet.  Installing the agent from a package will 
> override our ruby installs.
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Hi There,
We take this approach as well with our platform to ensure that puppet 
upgrades don''t affect any applications that may be using the OS version
of
Ruby.

Disclaimer:
I don''t actually love our approach to packaging Ruby and am aware of
its
flaws, however it has proved to be OK for the time being until I can fully 
review it.
(ie, should I be moving to an RPM per gem as per EPEL and Puppet Enterprise 
do, etc , etc ?)

Quick overview of what we do:
1. Build your Ruby from source, using a unique location for its prefix ie, 
/opt/ruby-1.8.7/
2. Build and install the rubygems framework into this install
3. Using gems, install all your required gems into the ruby 
installation, don''t forget that a number of them require additional 
libraries and packages to function, ie Augeas
4. Package this software into an RPM - Dont forget to add requires for the 
additional dependencies you need , as well as document all the gems you 
added and what they are for so you can repeat this process on other 
platforms, ie RHEL4/5/6
5. Grab the puppet and facter source - These ship with SPEC files to aid in 
building them, you just need to modify the ruby path they reference, and 
all should be OK. Don''t forget to add the dependencies for this package
against your own ruby packages so they install nice via YUM or similar.
6. Test lots of times, then deploy.

Maintainence wise, if we need to add / change functionality, we install the 
package on a clean dev host, make the changes and re-package into a new 
revision of that package. We repeat this procedure for all the other OS 
versions of ruby so they are identical feature wise. I have found the 
"rubygems_snapshot" gem/tool is quite useful for this kind of task.

Like I said, our approach is not perfect, but it works for now until I can 
clean it up and hopefully automate the lot with Jenkins.

I hope this is of some use.

Cheers,

K


On Wednesday, December 12, 2012 8:54:56 PM UTC, Alexander Philipp
wrote:
>
> Are there any good guides out there to using Puppet agents with a 
> dedicated, separate ruby install?  Our apps are all Ruby based and require 
> different versions than Puppet.  Installing the agent from a package will 
> override our ruby installs.
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On Wednesday, December 12, 2012 2:54:56 PM UTC-6, Alexander Philipp
wrote:
>
> Are there any good guides out there to using Puppet agents with a 
> dedicated, separate ruby install?  Our apps are all Ruby based and require 
> different versions than Puppet.  Installing the agent from a package will 
> override our ruby installs.

Have you considered a dedicated puppetmaster instead?  Especially if your 
apps are outward-facing, it would be good practice anyway to separate them 
as much as possible from your infrastructure services, such as Puppet.


John

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