Listener: extend connection balancer (#20268)

Signed-off-by: Loong Dai <loong.dai@intel.com>

Mirrored from https://github.com/envoyproxy/envoy @ 2167cb3b0bc0353cf53bca4a14a846c19de59018

BUILD

@@ -86,6 +86,7 @@ proto_library(
         "//contrib/envoy/extensions/filters/network/sip_proxy/tra/v3alpha:pkg",
         "//contrib/envoy/extensions/filters/network/sip_proxy/v3alpha:pkg",
         "//contrib/envoy/extensions/matching/input_matchers/hyperscan/v3alpha:pkg",
+        "//contrib/envoy/extensions/network/connection_balance/dlb/v3alpha:pkg",
         "//contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha:pkg",
         "//contrib/envoy/extensions/vcl/v3alpha:pkg",
         "//envoy/admin/v3:pkg",

contrib/envoy/extensions/network/connection_balance/dlb/v3alpha/BUILD

@@ -0,0 +1,9 @@
+# DO NOT EDIT. This file is generated by tools/proto_format/proto_sync.py.
+
+load("@envoy_api//bazel:api_build_system.bzl", "api_proto_package")
+
+licenses(["notice"])  # Apache 2
+
+api_proto_package(
+    deps = ["@com_github_cncf_udpa//udpa/annotations:pkg"],
+)

contrib/envoy/extensions/network/connection_balance/dlb/v3alpha/dlb.proto

@@ -0,0 +1,30 @@
+syntax = "proto3";
+
+package envoy.extensions.network.connection_balance.dlb.v3alpha;
+
+import "udpa/annotations/status.proto";
+
+option java_package = "io.envoyproxy.envoy.extensions.network.connection_balance.dlb.v3alpha";
+option java_outer_classname = "DlbProto";
+option java_multiple_files = true;
+option go_package = "github.com/envoyproxy/go-control-plane/envoy/extensions/network/connection_balance/dlb/v3alpha";
+option (udpa.annotations.file_status).package_version_status = ACTIVE;
+
+// [#protodoc-title: Dlb connection balancer configuration]
+// DLB :ref:`configuration overview <config_connection_balance_dlb>`.
+// [#extension: envoy.network.connection_balance.dlb]
+
+// The Dlb is a hardware managed system of queues and arbiters connecting producers and consumers. It is a PCIE device
+// in the CPU package. It interacts with software running on cores and potentially other devices. The Dlb implements the
+// following balancing features:
+//
+// -  Lock-free multi-producer/multi-consumer operation.
+// -  Multiple priorities for varying traffic types.
+// -  Various distribution schemes.
+//
+// Dlb connection balancer uses Dlb hardware to balance connections, and can significantly reduce latency.
+//
+// As the Dlb connection balancer provides assistance from dedicated Dlb hardware, it can be used for a proxy with a large number of connections
+// (e.g., a gateway).
+message Dlb {
+}

envoy/config/listener/v3/listener.proto

@@ -5,6 +5,7 @@ package envoy.config.listener.v3;
 import "envoy/config/accesslog/v3/accesslog.proto";
 import "envoy/config/core/v3/address.proto";
 import "envoy/config/core/v3/base.proto";
+import "envoy/config/core/v3/extension.proto";
 import "envoy/config/core/v3/socket_option.proto";
 import "envoy/config/listener/v3/api_listener.proto";
 import "envoy/config/listener/v3/listener_components.proto";
@@ -94,6 +95,11 @@ message Listener {
 
       // If specified, the listener will use the exact connection balancer.
       ExactBalance exact_balance = 1;
+
+      // The listener will use the connection balancer according to ``type_url``. If ``type_url`` is invalid,
+      // Envoy will not attempt to balance active connections between worker threads.
+      // [#extension-category: envoy.network.connection_balance]
+      core.v3.TypedExtensionConfig extend_balance = 2;
     }
   }
 

versioning/BUILD

@@ -23,6 +23,7 @@ proto_library(
         "//contrib/envoy/extensions/filters/network/sip_proxy/tra/v3alpha:pkg",
         "//contrib/envoy/extensions/filters/network/sip_proxy/v3alpha:pkg",
         "//contrib/envoy/extensions/matching/input_matchers/hyperscan/v3alpha:pkg",
+        "//contrib/envoy/extensions/network/connection_balance/dlb/v3alpha:pkg",
         "//contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha:pkg",
         "//contrib/envoy/extensions/vcl/v3alpha:pkg",
         "//envoy/admin/v3:pkg",