before_restart.rb

require "dnapi"
run "sudo cp /etc/chef/dna.json /tmp/dna.json && sudo chmod 777 /tmp/dna.json && sync"
def engineyard
  @engineyard ||= DNApi.from(File.read("/tmp/dna.json"))
end
b=engineyard.environment.utility_instances.find {|x| x.name.include? "redis"}
engineyard.apps.each do |app|
  begin
    run "echo host: #{b.public_hostname} > /data/#{app.name}/current/config/redis.yml"
  rescue
    run "echo host: localhost > /data/#{app.name}/current/config/redis.yml"
  end
end