vagrant-triggers

Allow the definition of arbitrary scripts that will run on the host or guest before and/or after Vagrant commands.

Installation

Ensure you have downloaded and installed Vagrant from the Vagrant downloads page.

Installation is performed in the prescribed manner for Vagrant plugins:

$ vagrant plugin install vagrant-triggers

⚠️ Altough the plugin should work with any version of Vagrant above 1.2, testing is done only for versions 1.7+.

Example Usage

Vagrant.configure("2") do |config|
  # Your existing Vagrant configuration
  ...

  # run some script before the guest is destroyed
  config.trigger.before :destroy do
    info "Dumping the database before destroying the VM..."
    run_remote  "bash /vagrant/cleanup.sh"
  end

  # clean up files on the host after the guest is destroyed
  config.trigger.after :destroy do
    run "rm -Rf tmp/*"
  end

  # start apache on the guest after the guest starts
  config.trigger.after :up do
    run_remote "service apache2 start"
  end

end

Syntax Overview

Vagrant.configure("2") do |config|
  # Your existing Vagrant configuration
  ...

  config.trigger.before :command, :option => "value" do
    run "script"
    ...
  end

  config.trigger.after :command, :option => "value" do
    run "script"
    ...
  end

  config.trigger.instead_of :command, :option => "value" do
    run "script"
    ...
  end
end

The instead_of trigger could also be aliased as reject.

The first argument is the command in which the trigger will be tied. It could be an array (e.g. [:up, :resume]) in case of multiple commands.

Starting from version 0.5.0, triggers can also be run as a provisioner:

Vagrant.configure("2") do |config|
  # Your existing Vagrant configuration
  ...

  config.vm.provision "trigger", :option => "value" do |trigger|
    trigger.fire do
      run "script"
    end
  end
end

Options

• :append_to_path => ["dir", "dir"]: additional places where looking for scripts. See this wiki page for details.
• :force => true|false: continue even if one of the scripts fails (exits with non-zero code). Defaults to false.
• :good_exit => [ ... ]: good command exit codes. Defaults to [0]. Don't forget to include 0 if you change the default value, unless you really want.
• :stderr => true|false: display standard error from scripts. Defaults to true.
• :stdout => true|false: display standard output from scripts. Defaults to true.
• :vm => ["vm1", /vm[2-3]/]: fire only for matching virtual machines. Value can be a string, a regexp or an array of strings and/or regexps.

Trigger block DSL

The given block will be evaluated by an instance of the VagrantPlugins::Triggers::DSL class. This class defines a very simple DSL for running scripts on the host machine. Only a few methods are directly defined, all the other calls will be forwarded to Vagrant's ui instance. This allows the definition of custom messages along with scripts.

For additional details you can take a look to the VagrantPlugins::Triggers::DSL definition.

Skipping execution

Triggers won't run if VAGRANT_NO_TRIGGERS environment variable is set.

Attaching to every command

The special name :ALL can be used as a wildcard for every vagrant command:

Vagrant.configure("2") do |config|
  config.trigger.before :ALL do
    ...
  end
end

Blacklisting commands

Commands can be blacklisted, so that the :ALL wildcard has no effect on them:

Vagrant.configure("2") do |config|
  config.trigger.blacklist :destroy
  config.trigger.before :ALL do
    ...
  end
end

Multiple commands can be blacklisted using an array.

A more detailed example

In the following example a VirtualBox VM (not managed by Vagrant) will be tied to the machine defined in Vagrantfile, to make so that it follows its lifecycle:

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

  {
    [:up, :resume] => "startvm 22aed8b3-d246-40d5-8ad4-176c17552c43 --type headless",
    :suspend       => "controlvm 22aed8b3-d246-40d5-8ad4-176c17552c43 savestate",
    :halt          => "controlvm 22aed8b3-d246-40d5-8ad4-176c17552c43 acpipowerbutton",
  }.each do |command, trigger|
    config.trigger.before command, :stdout => true do
      info "Executing #{command} action on the VirtualBox tied VM..."
      run  "vboxmanage #{trigger}"
    end
  end

end

For additional examples, see the trigger recipes wiki page.

Contributing

To contribute, clone the repository, and use Bundler to install dependencies:

$ bundle

To run the plugin's tests:

$ bundle exec rake

You can now fork this repository, make your changes and send a pull request.