ruby on rails - AWS OpsWorks Environment what is it the "my_node" and how add it to my Custom Chef JSON -

i running rails application in aws opsworks environment

i try add "whenever" gem rails app , saw there "whenever cookbook".

one of requirements is: "include whenever in node's run_list:"

{   "name":"my_node",   "run_list": [     "recipe[whenever]"   ] }

my question: "my_node" , how add custom chef json

{   "deploy":   {     "todoapp":     {       "database":       {         "adapter": "mysql2"       }     }   } }

thank, izik.

Braziel