Depoyer

gistfile1.rb

require 'script/util/ssh_wrapper.rb'

class Deployer
  def initialize(query_str)
    query = Chef::Search::Query.new
    @nodes = query.search(:node, query_str)[0]

    @ssh = SshWrapper.new
    @ssh.configure_session(@nodes)
  end

  def deploy
    set_action_and_update_nodes('deploy')
  end

  def rollback
    set_action_and_update_nodes('rollback')
  end

private

  def set_action_and_update_nodes(action)
    @nodes.each do |node|
      node.set['groupinator']["deploy_action"] = action
      node.save
    end

    @ssh.ssh_command("sudo chef-client")
  end
end

knife script

require 'script/util/deployer.rb'

abort("usage: knife exec script/deploy QUERY") unless ARGV[2]

Deployer.new(ARGV[2]).deploy

exit 0