heat_template_version: 2013-05-23

description: >
  Heat WordPress template to deploy WordPress on two instances using Heat's
  software orchestration feature.

  This template defines two SoftwareConfigs (one for the DB, one for WordPress)
  which reference separate scripts. Both of those SoftwareConfigs are associated
  to different servers via SoftwareDeployment definitions.
  For software configuration to work, the used image has to be prepared using
  image builder to contain the required elements as described in file
  hot/software-config/elements/README.rst in the heat-templates github repo.

  This template has been tested to work on Heat Icehouse using neutron network
  and using a Fedora 20 image. For differing setups, adaptations may be
  necessary.

parameters:
  key_name:
    type: string
    description: Name of a key pair to enable SSH access to instances.
    default: default
  flavor:
    type: string
    description: Flavor to use for the WordPress server.
    constraints:
      - custom_constraint: nova.flavor
  image:
    type: string
    description: >
      Name or ID of the image to use for the WordPress server.
      Recommended values are fedora-20.i386 or fedora-20.x86_64.
      Those images can be obtained from
      http://cloud.fedoraproject.org/fedora-20.i386.qcow2 or from
      http://cloud.fedoraproject.org/fedora-20.x86_64.qcow2 .
      The used image also has to have elements for software config built in.
    default: fedora-20.x86_64
  db_name:
    type: string
    description: WordPress database name
    default: wordpress
    constraints:
      - length: { min: 1, max: 64 }
        description: db_name must be between 1 and 64 characters
      - allowed_pattern: '[a-zA-Z][a-zA-Z0-9]*'
        description: >
          db_name must begin with a letter and contain only alphanumeric
          characters
  db_username:
    type: string
    description: The WordPress database admin account username
    default: admin
    hidden: true
    constraints:
      - length: { min: 1, max: 16 }
        description: db_username must be between 1 and 64 characters
      - allowed_pattern: '[a-zA-Z][a-zA-Z0-9]*'
        description: >
          db_username must begin with a letter and contain only alphanumeric
          characters

resources:
  wordpress_config:
    type: OS::Heat::SoftwareConfig
    properties:
      inputs:
        - name: db_name
        - name: db_user
        - name: db_password
        - name: db_ipaddr
      group: script
      config: { get_file: wp_install.sh }

  db_config:
    type: OS::Heat::SoftwareConfig
    properties:
      inputs:
        - name: db_rootpassword
        - name: db_name
        - name: db_user
        - name: db_password
      group: script
      config: { get_file: db_install.sh }

  db_root_password:
    type: OS::Heat::RandomString

  db_password:
    type: OS::Heat::RandomString

  wordpress_deployment:
    type: OS::Heat::SoftwareDeployment
    depends_on: db_deployment
    properties:
      config:
        get_resource: wordpress_config
      server:
        get_resource: webserver_instance
      input_values:
        db_name: { get_param: db_name }
        db_user: { get_param: db_username }
        db_password: { get_attr: [ db_password, value ] }
        db_ipaddr: { get_attr: [ dbserver_instance, networks, private, 0 ] }

  db_deployment:
    type: OS::Heat::SoftwareDeployment
    properties:
      config:
        get_resource: db_config
      server:
        get_resource: dbserver_instance
      input_values:
        db_rootpassword: { get_attr: [ db_root_password, value ] }
        db_name: { get_param: db_name }
        db_user: { get_param: db_username }
        db_password: { get_attr: [ db_password, value ] }

  webserver_instance:
    type: OS::Nova::Server
    properties:
      image: { get_param: image }
      flavor: { get_param: flavor }
      key_name: { get_param: key_name }
      user_data_format: SOFTWARE_CONFIG

  dbserver_instance:
    type: OS::Nova::Server
    properties:
      image: { get_param: image }
      flavor: { get_param: flavor }
      key_name: { get_param: key_name }
      user_data_format: SOFTWARE_CONFIG

outputs:
  WebsiteURL:
    description: URL for Wordpress wiki
    value:
      str_replace:
        template: http://host/wordpress
        params:
          host: { get_attr: [webserver_instance, networks, private, 0] }