no_magic.rb

repo = '%s-tools' % node['lsb']['codename']
apt_repository 'scalyr-agent-2' do 
  uri          'http://10.100.0.xx/repo/snapshots'
  arch          'amd64'
  distribution  repo
  components    [repo]
  key          'http://10.100.0.xx/repo/bjn.gpg'
end

package 'scalyr-agent-2' do
  action :install
  notifies :restart, 'service[scalyr-agent-2]'
end

file '/etc/scalyr-agent-2/version.json' do 
  content node['sai_scalyr']['url'] % {version: node['sai_scalyr']['version']}
end

file '/etc/scalyr-agent-2/agent.json' do 
  content node['sai_scalyr']['config']
end


service 'scalyr-agent-2' do 
  supports start:true, stop:true, restart:true
  action [ :enable, :start]
end

no_magic_attributes.rb

default['sai_scalyr']['config'] = {
  'api_key' => 'FIXME',
  'logs' => [],
  'monitors' => [],
}

default['sai_scalyr']['version'] = '1.2.5'

default['sai_scalyr']['url'] = 'http://bj.scalyr.com/%{version}'