Class: RightScale::PowershellHost

Inherits:
Object
  • Object
show all
Defined in:
lib/chef/windows/powershell_host.rb

Overview

This class is responsible for managing a Powershell process instance It allows running Powershell scripts in the associated instance and will log the script output.

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ PowershellHost

Start the Powershell process synchronously Set the instance variable :active to true once Powershell was successfully started

Parameters

options

Chef @node object

options

Associated Chef powershell provider name



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# File 'lib/chef/windows/powershell_host.rb', line 36

def initialize(options = {})
  Log.debug(format_log_message("Initializing"))
  @node             = options[:node]
  @provider_name    = options[:provider_name]
  @pipe_name        = "#{@provider_name}_#{Time.now.strftime("%Y-%m-%d-%H%M%S")}"

  @response_mutex = Mutex.new
  @response_event = ConditionVariable.new

  Log.debug(format_log_message("Starting pipe server"))
  @pipe_server = RightScale::Windows::PowershellPipeServer.new(:pipe_name => @pipe_name) do |kind, payload|
    case kind
      when :is_ready then
        query
      when :respond then
        respond(payload)
    end
  end

  unless @pipe_server.start
    @pipe_server = nil
    return
  end

  Log.debug(format_log_message("Starting chef node server"))
  RightScale::Windows::ChefNodeServer.instance.start(:node => @node)

  Log.debug(format_log_message("Starting host"))
  start_powershell_process

  Log.debug(format_log_message("Initialized"))
end

Instance Method Details

#format_log_message(message) ⇒ Object 



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# File 'lib/chef/windows/powershell_host.rb', line 69

def format_log_message(message)
  "[PowershellHost #{@pipe_name}] - #{message}"
end

#run(script_path) ⇒ Object

Run Powershell script in associated Powershell process Log stdout and stderr to Chef logger

Argument

script_path(String)

Full path to Powershell script to be run

Return

res(Number)

The exit code of the script that was run. nil if no exit status was available.

Raise

RightScale::Exceptions:ApplicationError

If Powershell process is not running (i.e. :active is false)



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# File 'lib/chef/windows/powershell_host.rb', line 84

def run(script_path)
  Log.debug(format_log_message("Running #{script_path}"))
  res = run_command("&\"#{script_path}\"")
  Log.debug(format_log_message("Finished #{script_path}"))
  res
end

#terminate ⇒ Object

Terminate associated Powershell process :run cannot be called after :terminate This method is idempotent

Return

true

Always return true



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# File 'lib/chef/windows/powershell_host.rb', line 97

def terminate
  Log.debug(format_log_message("Terminate requested"))
  res = run_command("break")
  Log.debug(format_log_message("Terminate signal sent"))

  true
end