Override Vagrant Configuration Settings Locally (Per-Dev)

Override Vagrant configuration settings locally (per-dev)

I would suggest using environment variables to dynamically change the behavior of the Vagrantfile without editing the file itself.

To give a real world example, here's how you could use an Ubuntu base box by default but have an environment variable define an alternative Linux distribution:

if ENV['OPERATINGSYSTEM']
  if ENV['OPERATINGSYSTEM'].downcase == 'redhat'
    os_name = 'centos'
    config.vm.box     = 'centos'
    config.vm.box_url = 'https://dl.dropbox.com/u/7225008/Vagrant/CentOS-6.3-x86_64-minimal.box'
  else
    raise(Exception, "undefined operatingsystem: #{ENV['OPERATINGSYSTEM']}")
  end
else
  os_name = 'precise64'
  config.vm.box     = 'precise64'
  config.vm.box_url = 'http://files.vagrantup.com/precise64.box'
end

This example comes from https://github.com/puppetlabs/puppetlabs-openstack_dev_env

enabling gui in Vagrantfile settings

vm.boot_mode is gone with Vagrant 1.1, but you can still use it if you enclose it in a V1 configuration block:

Vagrant.configure("1") do |config|
  config.vm.boot_mode = :gui
end

Vagrant.configure("2") do |config|
  # V2 Config...
end

Disable vagrant plugin execution

You can't deactivate plugin; so you need to look into the specific settings of the given plugin.

In the case of https://github.com/voxpupuli/vagrant-librarian-puppet you can't deactivate the plugin but you can tell it to look the Puppetfile into a directory where it will not be

Vagrant.configure("2") do |config|

  config.librarian_puppet.puppetfile_dir = "directory_with_no_puppet_file"

end

Note: I have not tried it myself but looking the source it should be okay and will skip librarian provisioning

Is it possible to write vagrant config file in python?

No, it's not possible to write Vagrant config files in Python. The native language for Vagrant is Ruby, and that's the language the config files are written in.

The Vagrant docs explain this and point out that it's usually not a problem if you don't know Ruby:

The syntax of Vagrantfiles is Ruby, but knowledge of the Ruby
programming language is not necessary to make modifications to the
Vagrantfile, since it is mostly simple variable assignment. In fact,
Ruby isn't even the most popular community Vagrant is used within,
which should help show you that despite not having Ruby knowledge,
people are very successful with Vagrant.

If you are looking to use Python for the provisioning step, you could use the Shell provisioner and write your scripts in Python.

There are also some projects that can help use Vagrant in a Python-focused environment. For example: todddeluca/python-vagrant.

Vagrant adding extra parameters/options

Unfortunately, this seems to not be possible at this time, at least not simply. This answer seems to have a helpful suggestion, but still requires extra work in your Vagrantfile or provisioning config.

The only options available to the vagrant provision command are:

$ vagrant provision -h
Usage: vagrant provision [vm-name] [--provision-with x,y,z]
    --provision-with x,y,z       Enable only certain provisioners, by type.
    --[no-]parallel              Enable or disable parallelism if provider supports it.
    -h, --help                   Print this help

What I do, instead, is edit the Vagrantfile while working on a specific feature (in my case, I use Ansible, and its tagging functionality to only run one set of plays (using tags)), and add in the argument I wish to pass within the provisioner definition block.

Increase memory of a particular vagrant box

You can easily do that by overriding the value for a specific VM

  config.vm.define "puppetmaster" do |pm|
    pm.vm.box = "centos/7"
    pm.vm.network "private_network", ip: "192.168.33.10"
    pm.vm.hostname = "puppetmaster"

    pm.vm.provider "virtualbox" do |pmv|
      pmv.memory = 4096
    end
  end

so your whole file becomes

Vagrant.configure("2") do |config|
  config.vm.synced_folder ".", "/vagrant", type: "virtualbox"

  config.vm.provider "virtualbox" do |v|
    v.memory = 2048
    v.cpus = 2
  end

  config.vm.define "puppetmaster" do |pm|
    pm.vm.box = "centos/7"
    pm.vm.network "private_network", ip: "192.168.33.10"
    pm.vm.hostname = "puppetmaster"

    pm.vm.provider "virtualbox" do |pmv|
      pmv.memory = 4096
    end
  end

  config.vm.define "puppet-agent-centos" do |pac|
    pac.vm.box = "centos/7"
    pac.vm.network "private_network", ip: "192.168.33.11"
    pac.vm.hostname = "centos-agent"
  end

  config.vm.define "puppet-agent-ubuntu" do |pau|
    pau.vm.box = "ubuntu/xenial64"
    pau.vm.network "private_network", ip: "192.168.33.12"
    pau.vm.hostname = "ubuntu-agent"
  end
end

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