get_attribute

Syntax

get_attribute: [resourceName, attributeName ]

Parameter Description

Return Value

Attribute value obtained

• When a single resource is created, the return values of refID and refName are strings.
• When multiple resources are created (for example, multiple ECS VMs are created at a time), the return values of refID and refName are string arrays.

Examples

• Obtain parameters and assign values to the parameters in the outputs section.

  Example: Obtain the ID of the created my-first-vpc, and then assign it to the vpc_id output parameter of a stack.

  tosca_definitions_version: huaweicloud_tosca_version_1_0
  inputs:
    name:
      default: test-vpc
    cidr:
      default: 10.0.0.0/8  
  node_templates:
    my-first-vpc:
      type: HuaweiCloud.VPC.VPC
      properties:
        name: {get_input: name}
        ciddr: {get_input: cidr}
  outputs:
    vpc_id:
      value: {get_attribute: [my-first-vpc,refID]}

• Obtain parameters and use them as input parameters for creating other resources.

  Example: Obtain the ID of the created my-second-vpc and assign a value to the subnet resource as the input for creating the subnet resource. In this way, multiple resources can be created in one blueprint file.

  node_templates:
    my-subnet:
      type: HuaweiCloud.VPC.Subnet
      properties:
        name: {get_input: subnet-name}
        cidr: {get_input: vpc-cidr}
        gateway: {get_input: subnet-gateway}
        dnsList: {get_input: dnsList}
        vpc: {get_attribute: [my-second-vpc,refID]}
        availabilityZone: {get_input: az}
      requirements:
        - vpc:
          node: my-vpc
          relationship: HuaweiCloud.Relationships.ContainedIn      
    my-second-vpc:
      type: HuaweiCloud.VPC.VPC
      properties:
        name: {get_input: vpc-name}
        cidr: {get_input: vpc-cidr}