Heat/Environments

What is an Environment?

I see an Environment as a container for anything that affects the behavior of the Template (kinda like structured parameters).

1. So parameters can be written into an environment file or automatically inserted if you pass them on the cli.
2. You define any non-default Providers in the Environment
3. You can define any extra/non-keystone credentials in the Environment

Template	Static architectural design of your application
Environment	Specific details that affect the instantiation of the Template
Stack	Template + Environment

Example

 parameters:
   InstanceType: m1.xlarge
   DBUsername: angus
   DBPassword: verybadpass
   KeyName: heat_key
 credentials:
   rackspace_creds:
       username: myusername
       api_key: 012345abcdef67890
 resources:
   provider: rackspace.com
   DatabaseServer:
       ImageId: this_image_please
       credentials: rackspace_creds