Installing a puppet module from a manifest script

Question

I\'m using puppet to provision a vagrant (ubuntu based) virtual machine. In my script I need to:

sudo apt-get build-dep python-lxml

I know

Answer 1

Using answers from this question I created this script:

#!/bin/bash

function install_module {
   IFS=':' read module version <<< "$1"
   if (puppet module list | grep $module ) >/dev/null; then
    echo "Module $module is already installed"
   else
        if [ -z "$version" ]; then
            puppet module install $module
        else 
        puppet module install -v $version $module
    fi
    fi  
}

if dpkg --compare-versions `puppet --version` "lt" 3.8.7; then
    sudo apt-get remove --purge -y puppet
    sudo apt-get -y autoremove
fi

if which puppet >/dev/null; then
    echo "Puppet is already installed"
else
    echo "Installing puppet"
    wget https://apt.puppetlabs.com/puppetlabs-release-trusty.deb
    sudo dpkg -i puppetlabs-release-trusty.deb
    sudo apt-get update
    sudo apt-get install -y puppet=3.8.7*
    mkdir -p /etc/puppet/modules
fi

for var in "$@" 
do
    install_module "$var"
done

Then you can use it from your Vagrantfile like this:

puppet_modules = [
    'puppetlabs-stdlib:4.16.0',
    'puppetlabs-apt:2.3.0',
    'puppet-nodejs:2.3.0'
    ]

config.vm.provision "shell", path: "puppet/scripts/puppet.sh", args: puppet_modules.join(" ")

It removes puppet from vm if version is lower than 3.8.7, then installs puppet 3.8.7, and then installs all the modules.

It would probably work only on debian/ubuntu boxes.

Answer 2

@brain_bacon's strategy worked almost perfectly for me, with one small caveat - if the module already exists, then the provisioning script fails, halting the provisioning process. The following adjustment fixed this:

config.vm.provision :shell, :run => "always" do |shell|
  shell.inline = %{
    mkdir -p /etc/puppet/modules;
    function install_module {
      folder=`echo $1 | sed s/.*-//`
      if [ ! -d /etc/puppet/modules/$folder ]; then
        puppet module install $1
      fi
    }
    install_module stdlib
    install_module apt
    install_module ruby
  }
end