Cooking Perl with Chef - Grant Report #3
Sun, 20-May-2012 by
Alan Haggai Alavi
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*David Golden reported:*
> <b>Current progress</b>
>
> <p>Three of the eight deliverables are complete and a fourth is substantially complete:</p>
>
> <ol>
> <li>Publish a Chef cookbook for Perl interpreter deployment</li>
> <li>Publish a Chef cookbook for CPAN module deployment</li>
> <li>Publish a Chef cookbook for Plack application deployment</li>
> <li>Improve the Pantry command line tool (80%)</li>
> </ol>
>
> <p><strong>Pantry</strong></p>
>
> <p>
> I released new versions of <a href="http://p3rl.org/Pantry">Pantry</a> to CPAN, which add
> support for command-line configuration of Chef nodes and roles for use with Chef Solo.
> </p>
>
> <p>For example, here is how one might use it to create node and role
> configuration data in a project directory. The following commands create
> properly structured JSON configuration data files for a "web" role (that has
> NTP and nginx deployed, with nginx as user 'nobody') and for the "www.example.com"
> server that fulfills that role:</p>
>
> <code><pre>
> $ mkdir my-project && cd my-project
> $ pantry init
> $ pantry create role web
> $ pantry apply role -r ntp -r nginx
> $ pantry apply role --default nginx.user=nobody
> $ pantry create node www.example.com
> $ pantry apply node www -R web
> </code></pre>
>
> Assuming the 'ntp' and 'nginx' cookbooks are copied into the 'cookbooks' directory
> of the project folder (whether from the Opscode community site or from a git
> repository), the following commands would configure the server by copying all
> necessary files via ssh/rsync and invoking 'chef-solo' on the server:
>
> <code><pre>
> $ ssh-add ~/path/to/ssh/key/id_dsa
> $ pantry sync www
> </code></pre>
>
> <p>
> The server must already be bootstrapped with chef-solo, but this step will be
> described in the teaching deliverables. I may explore tools like <a
> href="http://vagrantup.com/">Vagrant</a> to help people get virtual
> images bootstrapped for the tutorials.
> </p>
>
> <p>
> Pantry needs some additional work to support different deployment environments, but
> I've put that on the back burner until the teaching deliverables are underway.
> </p>
>
> <p><strong>Other CPAN modules</strong></p>
>
> <p>
> I've also been working on getting Metabase code in shape to be used for the real-world
> tutorial. This took a bit longer than I anticipated as some of it had not been touched
> in some time and evolution of dependencies (e.g. Moose, Catalyst, CHI) broke some things
> that needed fixing.
> </p>
>
> <p>
> Between Pantry and the Metabase work, over the last month, I released 10
> distributions directly or indirectly related to my work on this grant:
> </p>
>
> <ul>
> <li> <a href="http://p3rl.org/CPAN::Testers::Metabase">CPAN::Testers::Metabase</a></li>
> <li> <a href="http://p3rl.org/CPAN::Testers::Metabase::AWS">CPAN::Testers::Metabase::AWS</a></li>
> <li> <a href="http://p3rl.org/CPAN::Testers::Metabase::MongoDB">CPAN::Testers::Metabase::MongoDB</a></li>
> <li> <a href="http://p3rl.org/IO::Prompt::Tiny">IO::Prompt::Tiny</a></li>
> <li> <a href="http://p3rl.org/Metabase">Metabase</a></li>
> <li> <a href="http://p3rl.org/Metabase::Backend::AWS">Metabase::Backend::AWS</a></li>
> <li> <a href="http://p3rl.org/Metabase::Backend::MongoDB">Metabase::Backend::MongoDB</a></li>
> <li> <a href="http://p3rl.org/Metabase::Backend::SQL">Metabase::Backend::SQL</a></li>
> <li> <a href="http://p3rl.org/MooseX::Types::Path::Class::MoreCoercions">MooseX::Types::Path::Class::MoreCoercions</a></li>
> <li> <a href="http://p3rl.org/Pantry">Pantry</a></li>
> </ul>
>
> <p>
> I also shaved various yaks in my build tools. For those who use similar tools,
> you may appreciate some of the improvements in these:
> </p>
>
> <ul>
> <li> <a href="http://p3rl.org/App::mymeta_requires">App::mymeta_requires</a></li>
> <li> <a href="http://p3rl.org/Pod::Wordlist::hanekomu">Pod::Wordlist::hanekomu</a></li>
> <li> <a href="http://p3rl.org/Dist::Zilla::Plugin::Test::ReportPrereqs">Dist::Zilla::Plugin::Test::ReportPrereqs</a></li>
> <li> <a href="http://p3rl.org/Dist::Zilla::Plugin::CheckExtraTests">Dist::Zilla::Plugin::CheckExtraTests</a></li>
> </ul>
>
> <p><b>Current work and next steps</b></p>
>
> <p>
> I've spent a larger-than-expected chunk of time updating the Metabase codebase,
> but I now have complete proofs-of-concept for the following:
> </p>
>
> <ul>
> <li>Deploying MongoDB nodes via pantry/chef-solo</li>
> <li>Metabase web server using the new MongoDB backend (tested locally only)</li>
> </ul>
>
> <p>
> The next step will be deploying Metabase via pantry/chef and then testing the
> two-node system. After that is complete, I will start drafting the teaching
> deliverables for the grant.
> </p>
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