grpc: adding limits to outbound buffered data for google-gRPC access logs (#11072)

Risk Level: Medium (changes by default)
Testing: new unit tests, new guard also tested
Docs Changes: n/a
Release Notes: yes
Optional Runtime guard: envoy.reloadable_features.allow_unbounded_access_logs

Fixes #10764

Signed-off-by: Alyssa Wilk <alyssar@chromium.org>

Mirrored from https://github.com/envoyproxy/envoy @ abdbbde827e3a76d014feb9a94ec4f803b1950c3

envoy/config/core/v3/grpc_service.proto

@@ -8,6 +8,7 @@ import "google/protobuf/any.proto";
 import "google/protobuf/duration.proto";
 import "google/protobuf/empty.proto";
 import "google/protobuf/struct.proto";
+import "google/protobuf/wrappers.proto";
 
 import "udpa/annotations/sensitive.proto";
 import "udpa/annotations/status.proto";
@@ -37,7 +38,7 @@ message GrpcService {
     string cluster_name = 1 [(validate.rules).string = {min_bytes: 1}];
   }
 
-  // [#next-free-field: 7]
+  // [#next-free-field: 8]
   message GoogleGrpc {
     option (udpa.annotations.versioning).previous_message_type =
         "envoy.api.v2.core.GrpcService.GoogleGrpc";
@@ -232,6 +233,10 @@ message GrpcService {
     // Additional configuration for site-specific customizations of the Google
     // gRPC library.
     google.protobuf.Struct config = 6;
+
+    // How many bytes each stream can buffer internally.
+    // If not set an implementation defined default is applied (1MiB).
+    google.protobuf.UInt32Value per_stream_buffer_limit_bytes = 7;
   }
 
   reserved 4;

envoy/config/core/v4alpha/grpc_service.proto

@@ -8,6 +8,7 @@ import "google/protobuf/any.proto";
 import "google/protobuf/duration.proto";
 import "google/protobuf/empty.proto";
 import "google/protobuf/struct.proto";
+import "google/protobuf/wrappers.proto";
 
 import "udpa/annotations/sensitive.proto";
 import "udpa/annotations/status.proto";
@@ -37,7 +38,7 @@ message GrpcService {
     string cluster_name = 1 [(validate.rules).string = {min_bytes: 1}];
   }
 
-  // [#next-free-field: 7]
+  // [#next-free-field: 8]
   message GoogleGrpc {
     option (udpa.annotations.versioning).previous_message_type =
         "envoy.config.core.v3.GrpcService.GoogleGrpc";
@@ -232,6 +233,10 @@ message GrpcService {
     // Additional configuration for site-specific customizations of the Google
     // gRPC library.
     google.protobuf.Struct config = 6;
+
+    // How many bytes each stream can buffer internally.
+    // If not set an implementation defined default is applied (1MiB).
+    google.protobuf.UInt32Value per_stream_buffer_limit_bytes = 7;
   }
 
   reserved 4;