From 53e04b261563050a1a644692fe5806372fecb55d Mon Sep 17 00:00:00 2001
From: spacewander <spacewanderlzx@gmail.com>
Date: Thu, 3 Jun 2021 16:36:19 +0800
Subject: [PATCH] embed: unlimit the recv msg size of grpc-gateway

Ensure the client which access etcd via grpc-gateway won't
be limited by the MaxCallRecvMsgSize. Here we choose the same
default value of etcdcli as grpc-gateway's MaxCallRecvMsgSize.

Fix https://github.com/etcd-io/etcd/issues/12576
---
 server/embed/serve.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/server/embed/serve.go b/server/embed/serve.go
index 23e115d6a5e..17b55384ebb 100644
--- a/server/embed/serve.go
+++ b/server/embed/serve.go
@@ -19,6 +19,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	defaultLog "log"
+	"math"
 	"net"
 	"net/http"
 	"strings"
@@ -222,6 +223,10 @@ func (sctx *serveCtx) registerGateway(opts []grpc.DialOption) (*gw.ServeMux, err
 		addr = fmt.Sprintf("%s://%s", network, addr)
 	}
 
+	opts = append(opts, grpc.WithDefaultCallOptions([]grpc.CallOption{
+		grpc.MaxCallRecvMsgSize(math.MaxInt32),
+	}...))
+
 	conn, err := grpc.DialContext(ctx, addr, opts...)
 	if err != nil {
 		return nil, err