ref

none 

References the name attribute of a cluster element.

lb-policy

round-robin

(optional) Specifies the load balancing policy. Allowed values are: 

• round-robin — The load balancer cycles through the cluster's server instances in a specified order.

• weighted-round-robin — The load balancer cycles through the server instances in a specified order, but routes more requests to instances with greater processing capacity. Processing capacity is represented by values of the lb-weight attribute of each server element referenced by the cluster.

• user-defined — The load balancing policy is defined in a custom module.

lb-policy-module

none 

(optional) Specifies the absolute path to the shared library that implements the user-defined policy. The shared library must exist and be readable on the machine where the load balancer is running. 

Required only if lb-policy is set to user-defined.