chef_run.rb

require 'blender/chef'

init(:ssh, user: 'some', password: ask('Pass: '), stdout: $stdout)
init(:chef, config_file: 'knife.rb')

members search(:chef, '*:*')

ssh_task 'run chef' do
  execute 'sudo chef-client --no-fork'
end

orchestrate_lxc.rb

require 'lxc'
 
init(:ssh, user: 'ubuntu', password: 'ubuntu', stdout: $stdout) 
# can be set manually as well
#members( ['10.0.3.1', '10.0.3.2'])
members( LXC.list_containers.map{|n| LXC::Container.new(n).ip_addresses.first})
 
ssh_task('check memory') do
  execute('free -m')
end