ULB.LoadBalancer

Element Description

The ULB.LoadBalancer element can be used to deploy a shared load balancer resource object at the PaaS layer. By creating such an object, you can provide a unified entry address for a group of containerized applications with the same functions, and distribute requests in load balancing mode to backend container applications. Shared load balancers are applicable to web services with high access traffic. They forward requests based on domain names or URLs, making request routing more flexible. Compared with classic load balancers, shared load balancers provide stronger HTTP and HTTPS forwarding capabilities, and better forwarding performance and stability.

Element Properties

**Table 1** Property Description
Property	Mandatory	Descripiton
vipAddress	No	IP address of the VPC where the shared load balancer is located Type: ip Value Description: IP address that is not used in the selected subnet Value Constraint: The value must be an IP address.
description	No	Description Type: string Value Description: Customize the value. Value Constraint: The value supports a maximum of 255 characters. Suggestion: Customize the value.
publicIpId	No	ID of the elastic IP address that can be bound to the shared load balancer Type: string Value Description: ID of the elastic IP address that can be bound to the VPC. Suggestion: Query the binding status and ID of the elastic IP address on the elastic IP address page of the VPC service.
subnetId	Yes	ID of the subnet that allocates VIP addresses to the shared load balancer Type: Cloud.VPC.Subnet.All.Id Value Description: ID of the subnet of the VPC Value Constraint: You can view the subnet ID in the VPC details page. Suggestion: Drag the object to VPC.Subnet and use *{get_attribute: [element name, neutron_subnet_id]}* to automatically generate the value.
name	No	Name of the shared load balancer Type: string Value Description: Customize the value. Value Constraint: The value supports a maximum of 64 characters and can only contain digits, letters, underscores (_), and hyphens (-). Suggestion: Customize the value.

Relationships Between Elements

**Table 2** Relationship description
Description	Target
Connected	VPC.Subnet
Connected	VPC.EIP

Return Value

Property	Type	Description
vip_port_id	string	PORT_ID of the VPC where the shared load balancer is located
refName	string	Name of the shared load balancer
refID	string	ID of the shared load balancer
vip_address	string	IP address of the VPC where the shared load balancer is located

Blueprint Example

tosca_definitions_version: cloud_tosca_version_1_0
inputs:
  subnetId:
    description: ID of the subnet that allocates VIP addresses to the shared load balancer. It is the subnet ID rather than the subnet network ID.
node_templates:
  ulb:
    properties:
      description: ulb load balancer
      subnetId:
        get_input: subnetId
    type: Cloud.ULB.LoadBalancer

Parent topic: List of Elements

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