In this post I want to share my chef cookbook called cpan.
Chef is the modern platform for deploy automation and configuration.
One of chef great feature - one may create custom recipes to deploy/configure
specific applications, written on any languages. When I first met with chef,
I had already had some experience on deploying perl applications. I used standard build cycle:
perl Build.PL
./Build
./Build installdeps
./Build test
./Build install
So the idea of integrating perl application install come into my mind in natural way.
With cpan cookbook one may do standard perl build/test/install idioms using chef.
Here I am putting some use cases, just to give some sense of what it is. If you like it, you
may learn more on http://community.opscode.com/cookbooks/cpan.
Cpan cookbook use cases
Installing application, distributed with tar-ball. Let's say you have already fetch and store tar-ball with
others chef resources (the following code is self-explanatory). So you may easily install it into given install base:
remote_file '/tmp/app-0.0.1.tag.gz'
source 'http://local.server/app-0.0.1.tag.gz'
end
execute 'cd /tmp/ && tar -xzf app.tag.gz'
cpan_client 'my application' do
user 'root'
group 'root'
install_type 'application'
action 'install'
install_base '/path/to/your/application/home'
cwd '/tmp/app-0.0.1'
end
The same thing with your perl5lib paths taking into account ('/home/user/alex/perl5lib/'):
cpan_client 'my application' do
user 'root'
group 'root'
install_type 'application'
action 'install'
install_base '/path/to/your/application/home'
cwd '/tmp/app-0.0.1'
inc %w{ /home/user/alex/perl5lib/ }
end
If you need just installing arbitrary cpan module, here some examples to start.
Install by given link:
cpan_client "http://search.cpan.org/CPAN/authors/id/M/MA/MARKSTOS/CGI.
+pm-3.59.tar.gz" do
user 'root'
group 'root'
module_name 'CGI'
action 'install'
end
Or just rely on your cpan mirrors:
cpan_client 'CGI' do
user 'root'
group 'root'
install_type 'cpan_module'
action 'install'
end
With cpan cookbooks you may even play with version requirements.
Require minimal version:
cpan_client 'CGI' do
user 'root'
group 'root'
version '3.55'
install_type 'cpan_module'
action 'install'
end
Do not install if already installed:
cpan_client 'CGI' do
user 'root'
group 'root'
version '0'
install_type 'cpan_module'
action 'install'
end
Try to upgrade to highest possible version:
cpan_client 'CGI' do
user 'root'
group 'root'
install_type 'cpan_module'
action 'install'
end
If you install by distributive, you may even require concrete version:
cpan_client 'http://search.cpan.org/CPAN/authors/id/M/MA/MARKSTOS/CGI.
+pm-3.59.tar.gz' do
user 'root'
group 'root'
module_name 'CGI'
version '=3.59'
action 'install'
end
Other examples to check out is on
http://community.opscode.com/cookbooks/cpan.
