substitution

Hi all,

I'm confused when I went through the substitution example of simpl yaml v1.1.

According to the specification, the inputs and outputs defined by the topology template should match the properties and attributes of the node type definition, but the inputs of database example obviously doesn't match the properties of Database node type. which is db_user,db_password and user, passord.

Is it a document issue or I misunderstand ?

Thanks for your help.

Huabing

The below sentence is from 2.10.3 Definition of the database stack in a service template

"Further note that no mappings for properties or attributes of the substituted node are defined. Instead, the inputs and outputs defined by the topology template have to match the properties and attributes or the substituted node. If there are more inputs than the substituted node has properties, default values must be defined for those inputs, since no values can be assigned through properties in a substitution case"

The substitution example from 2.10.3

tosca_definitions_version: tosca_simple_yaml_1_0

topology_template:

description: Template of a database including its hosting stack.

inputs:

db_user: (should be 'user' ?)

type: string

db_password:(should be 'password' ?)

type: string

# other inputs omitted for brevity

substitution_mappings:

node_type: tosca.nodes.Database

capabilities:

database_endpoint: [ database, database_endpoint ]

node_templates:

database:

type: tosca.nodes.Database

properties:

user: { get_input: db_user }

# other properties omitted for brevity

requirements:

- host: dbms

dbms:

type: tosca.nodes.DBMS

# details omitted for brevity

server:

type: tosca.nodes.Compute

# details omitted for brevity

The definition of Database nodetype:

tosca.nodes.Database:

derived_from: tosca.nodes.Root

properties:

name:

type: string

description: the logical name of the database

port:

type: integer

description: the port the underlying database service will listen to for data

user:

type: string

description: the optional user account name for DB administration

required: false

password:

type: string

description: the optional password for the DB user account

required: false

requirements:

- host:

capability: tosca.capabilities.Container

node: tosca.nodes.DBMS

relationship: tosca.relationships.HostedOn

capabilities:

database_endpoint:

type: tosca.capabilities.Endpoint.Database

tosca message