tosca_definitions_version: tosca_simple_yaml_1_0

description: >
   Database subsystem, which is service template with topology_template,
   act as a nested system inside another system and also act as stand
   alone service template.

imports:
  - definitions.yaml

topology_template:
  description: Template of a database including its hosting stack.

  inputs:
    user:
      type: string
      description: the user name of database.
      default: test
    port:
      type: integer
      description: the port of database.
      default: 3306
    name:
      type: string
      description: the name of database.
      default: test
    my_cpus:
      type: integer
      description: Number of CPUs for the server.
      default: 2
      constraints:
        - valid_values: [ 1, 2, 4, 8 ]

  substitution_mappings:
    node_type: example.DatabaseSubsystem
    capabilities:
      database_endpoint: [ db_app, database_endpoint ]

  node_templates:
    db_app:
      type: tosca.nodes.Database
      properties:
        user: { get_input: user }
        port: { get_input: port }
        name: { get_input: name }
      capabilities:
        database_endpoint:
          properties:
            port: 1234
      requirements:
        - host:
            node: dbms

    dbms:
      type: tosca.nodes.DBMS
      properties:
        port: 3306
        root_password: 123456789
      requirements:
        - host:
            node: server

    server:
      type: tosca.nodes.Compute
      capabilities:
        host:
          properties:
            disk_size: 10 GB
            num_cpus: { get_input: my_cpus }
            mem_size: 4096 MB
        os:
          properties:
            architecture: x86_64
            type: Linux
            distribution: Ubuntu
            version: 14.04

  outputs:
    receiver_ip:
      description: private IP address of the database application
      value: { get_attribute: [ server, private_address ] }
# It seems current _process_intrisic_function can not handle more than 2 arguments, save it for later
#    receiver_port:
#      description: Port of the message receiver endpoint
#      value: { get_attribute: [ app, data_endpoint, port_name ] }

  groups:
    dbserver_group:
      members: [ dbms, server ]
      type: tosca.groups.Root