Load balancing policies ======================= Extendable load balancing policies could be configured for each cluster by :ref:`load balancer policy <envoy_v3_api_field_config.cluster.v3.Cluster.load_balancing_policy>`. And the developer can implement a custom load balancing policy and configured it. See built-in load balancing policies by :ref:`APIs <envoy_v3_api_config_load_balancer_policies>`. :ref:`Enum based load balancing policies <envoy_v3_api_field_config.cluster.v3.Cluster.lb_policy>` will be suupported for backward compatibility and marked as deprecated. The new extendable load balancing policies should be used as a priority if the related policies are implemented. Use :ref:`random load balancing policy <envoy_v3_api_msg_extensions.load_balancing_policies.random.v3.Random>` as an example: .. code-block:: yaml name: example_cluster type: STRICT_DNS connect_timeout: 0.25s load_assignment: cluster_name: example_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: example.com port_value: 80 load_balancing_policy: policies: - typed_extension_config: name: envoy.load_balancing_policies.random typed_config: "@type": type.googleapis.com/envoy.extensions.load_balancing_policies.random.v3.Random