heat_template_version: 2015-10-15

description: This is a Heat template

parameters:
  key_name:
    type: string
    description : Name of a key pair to enable SSH access to instances.
    default: my_key

  flavor:
    type: string
    description: Flavor to use for the WordPress server.
    constraints:
      - custom_constraint: nova.flavor
    default: 4 GB Performance

  image:
    type: string
    description: >
      Name or ID of the image to use for the WordPress server.
    default: f4bbbce2-50b0-4b07-bf09-96c175a45f4b

resources:
  lamp_asg:
    type: Rackspace::AutoScale::Group
    properties:
      groupConfiguration:
        name: { get_param: "OS::stack_name" }
        metadata:
          rax-heat: { get_param: "OS::stack_id" }
        maxEntities: 3
        minEntities: 1
        cooldown: 120
      launchConfiguration:
        type: launch_stack
        args:
          stack:
            template_url: https://raw.githubusercontent.com/rackerlabs/rs-heat-docs/master/templates/launch_stack_template.yaml
            disable_rollback: False
            parameters:
              flavor: {get_param: flavor}
              image: {get_param: image}
              key_name: {get_param: key_name}
            timeout_mins: 30

  scale_up_policy:
    type: Rackspace::AutoScale::ScalingPolicy
    properties:
      group: { get_resource: lamp_asg }
      name:
        str_replace:
          template: stack scale up policy
          params:
            stack: { get_param: "OS::stack_name" }
      change: 1
      cooldown: 600
      type: webhook

  scale_up_webhook:
    type: Rackspace::AutoScale::WebHook
    properties:
      name:
        str_replace:
          template: stack scale up hook
          params:
            stack: { get_param: "OS::stack_name" }
      policy: { get_resource: scale_up_policy }
  
  scale_down_policy:
    type: Rackspace::AutoScale::ScalingPolicy
    properties:
      group: { get_resource: lamp_asg }
      name:
        str_replace:
          template: stack scale down policy
          params:
            stack: { get_param: "OS::stack_name" }
      change: -1
      cooldown: 600
      type: webhook

  scale_down_webhook:
    type: Rackspace::AutoScale::WebHook
    properties:
      name:
        str_replace:
          template: stack scale down hook
          params:
            stack: { get_param: "OS::stack_name" }
      policy: { get_resource: scale_down_policy }

outputs:
  "Scale UP webhook":
    value: { get_attr: [ scale_up_webhook, executeUrl ] }
  
  "Scale DOWN webhook":
    value: { get_attr: [ scale_down_webhook, executeUrl ] }