ULB.Member

Element Description

For ECSs under a shared load balancer, one pool corresponds to multiple ECSs. You can add or delete ECSs as required.

Element Properties

**Table 1** Property Description
Property	Mandatory	Descripiton
weight	No	Weight of an ECS, which determines the proportion of requests to be forwarded compared with other members in the same ECS group Type: integer Value Description: Customize the value. The value is an integer between 1 and 256, for example, 3. Value Constraint: {u'in_range': [0, 256]} Suggestion: Set the value based on the live environment.
address	No	Private IP address of the backend ECS added to the listener Type: ip array Value Description: private network IP address generated after an ECS is created, for example, 192.168.0.45 Value Constraint: The IP address must be the private network IP address of the existing ECS instance. The ECS and listener must be in the same subnet. Set either address or serverId. Suggestion: You are advised to drag the object to the ECS.CloudServer and use *{get_attribute: [ECS element, privateIps]}* to automatically generate the value. Alternatively, obtain the private network IP address on the ECS console and enter it accordingly.
poolId	Yes	ID of the ECS group to which the ECS is to be added Type: string Value Description: ID of the ECS group to which the ECS is to be added Suggestion: Use the get_reference function to automatically generate the value.
subnetId	Yes	ID of the subnet where the ECS and listener are located Type: Cloud.VPC.Subnet.All.Id Value Description: ID of the subnet of the VPC Value Constraint: The subnet ID must be the same as that in the listener. Suggestion: Drag the object to VPC.Subnet and use *{get_attribute: [element name, neutron_subnet_id]}* to automatically generate the value. Alternatively, obtain the subnet ID on the VPC details page.
serverId	No	ID of the backend ECS added to the listener Type: string array Value Description: ID generated after an ECS is created, for example, b7a65ad3-c031-43cc-93ac-ac6dbdbd2295. Value Constraint: The ID must be the ID of an existing ECS instance. The ECS and listener must be in the same subnet. Set either address or serverId. Suggestion: You are advised to drag the object into ECS.CloudServer and use *{get_attribute: [ECS element, refID]}* to automatically generate the value. Alternatively, search for the ID on the ECS console and enter it accordingly.
port	Yes	Backend port of the ECS Type: integer Value Description: Customize the value. The value is an integer between 1 and 65535, for example, 8089. Value Constraint: {u'in_range': [1, 65535]} Suggestion: Set the value based on the live environment.

Relationships Between Elements

**Table 2** Relationship description
Description	Target
Connected	VPC.Subnet
Connected	ECS.CloudServer
Inclusion	ULB.Pool

Return Value

Property	Type	Description
refID	string	Backend ECS instance ID
poolId	string	ID of the ECS group to which the backend ECS belongs

Blueprint Example

tosca_definitions_version: cloud_tosca_version_1_0
inputs:
  pool_protocol:
     description: 'ECS group protocol, which must be consistent with the listener protocol' 
  pool_listenerId:
     description: Belonged listener ID 
  pool_lbAlgorithm:
     description: Allocation policy type 
  delay:
     description: Interval for health check (unit: s) 
  timeout:
     description: Maximum timeout duration for health check (unit: s) 
  max_retries:
    description: The number of consecutive times a cloud server fails or passes health checks, after which the health check status of the backend cloud server changes from success to fail or from fail to success, respectively.
  type:
     description: Health check protocol 
  subnetId:
     description: ID of the subnet to which the ECS and listener belong. It is the subnet ID rather than the subnet network ID.
  address:
     description: Private IP address of the backend ECS added to the listener 
  port:
     description: Backend port of the ECS 
node_templates:
  pool:
    type: Cloud.ULB.Pool
    properties:
      protocol:
        get_input: pool_protocol
      listenerId:
        get_input: pool_listenerId
      lbAlgorithm:
        get_input: pool_lbAlgorithm
  health-monitor:
    type: Cloud.ULB.Healthmonitor
    properties:
      delay:
        get_input: delay
      timeout:
        get_input: timeout
      maxRetries:
        get_input: max_retries
      type:
        get_input: type
      poolId:
        get_reference: pool
    requirements:
      - poolId:
          node: pool
  member:
    type: Cloud.ULB.Member
    properties:
      subnetId:
        get_input: subnetId
      address:
        - get_input: address
      port:
        get_input: port
      poolId:
        get_reference: pool
    requirements:
      - poolId:
          node: pool

Parent topic: List of Elements

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