fix: proxy grpc sometimes occurs 502

apisix/balancer.lua

@@ -313,18 +313,17 @@ do
             pool_opt.pool_size = size
 
             local scheme = up_conf.scheme
+            local pool = scheme .. "#" .. server.host .. "#" .. server.port
             -- other TLS schemes don't use http balancer keepalive
             if (scheme == "https" or scheme == "grpcs") then
-                local pool = server.host .. "#" .. server.port
                 local sni = ctx.var.upstream_host
                 pool = pool .. "#" .. sni
 
                 if up_conf.tls and up_conf.tls.client_cert then
                     pool = pool .. "#" .. up_conf.tls.client_cert
                 end
-
-                pool_opt.pool = pool
             end
+            pool_opt.pool = pool
 
             local ok, err = balancer.set_current_peer(server.host, server.port,
                                                       pool_opt)

ci/centos7-ci.sh

@@ -55,7 +55,7 @@ install_dependencies() {
 
     CGO_ENABLED=0 go build
     ./grpc_server_example \
-        -grpc-address :50051 -grpcs-address :50052 -grpcs-mtls-address :50053 \
+        -grpc-address :50051 -grpcs-address :50052 -grpcs-mtls-address :50053 -grpc-http-address :50054 \
         -crt ../certs/apisix.crt -key ../certs/apisix.key -ca ../certs/mtls_ca.crt \
         > grpc_server_example.log 2>&1 || (cat grpc_server_example.log && exit 1)&
 

ci/linux_openresty_common_runner.sh

@@ -71,7 +71,7 @@ script() {
     set_coredns
 
     ./t/grpc_server_example/grpc_server_example \
-        -grpc-address :50051 -grpcs-address :50052 -grpcs-mtls-address :50053 \
+        -grpc-address :50051 -grpcs-address :50052 -grpcs-mtls-address :50053 -grpc-http-address :50054 \
         -crt ./t/certs/apisix.crt -key ./t/certs/apisix.key -ca ./t/certs/mtls_ca.crt \
         &
 

t/grpc_server_example/go.mod

@@ -3,7 +3,7 @@ module github.com/api7/grpc_server_example
 go 1.11
 
 require (
-	github.com/golang/protobuf v1.5.0
+	golang.org/x/net v0.2.0
 	google.golang.org/grpc v1.32.0
-	google.golang.org/protobuf v1.27.1 // indirect
+	google.golang.org/protobuf v1.27.1
 )

t/grpc_server_example/go.sum

@@ -18,29 +18,52 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJVlRHBcsciT5bXOrH628=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
+golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.2.0/go.mod h1:TVmDHMZPmdnySmBfhjOoOdhjzdE1h4u1VwSiw2l1Nuc=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.4.0 h1:BrVqGRd7+k1DiOgtnFvAkoQEWQvBc25ouMJM6429SFg=
+golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=

t/grpc_server_example/main.go

@@ -28,12 +28,16 @@ import (
 	"crypto/x509"
 	"flag"
 	"fmt"
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/h2c"
 	"io"
 	"io/ioutil"
 	"log"
 	"net"
+	"net/http"
 	"os"
 	"os/signal"
+	"strings"
 	"syscall"
 	"time"
 
@@ -50,6 +54,7 @@ var (
 	grpcAddr      = ":50051"
 	grpcsAddr     = ":50052"
 	grpcsMtlsAddr string
+	grpcHTTPAddr  string
 
 	crtFilePath = "../t/cert/apisix.crt"
 	keyFilePath = "../t/cert/apisix.key"
@@ -60,6 +65,7 @@ func init() {
 	flag.StringVar(&grpcAddr, "grpc-address", grpcAddr, "address for grpc")
 	flag.StringVar(&grpcsAddr, "grpcs-address", grpcsAddr, "address for grpcs")
 	flag.StringVar(&grpcsMtlsAddr, "grpcs-mtls-address", grpcsMtlsAddr, "address for grpcs in mTLS")
+	flag.StringVar(&grpcHTTPAddr, "grpc-http-address", grpcHTTPAddr, "addresses for http and grpc services at the same time")
 	flag.StringVar(&crtFilePath, "crt", crtFilePath, "path to certificate")
 	flag.StringVar(&keyFilePath, "key", keyFilePath, "path to key")
 	flag.StringVar(&caFilePath, "ca", caFilePath, "path to ca")
@@ -217,6 +223,21 @@ func (s *server) Run(ctx context.Context, in *pb.Request) (*pb.Response, error)
 	return &pb.Response{Body: in.User.Name + " " + in.Body}, nil
 }
 
+func gRPCAndHTTPFunc(grpcServer *grpc.Server) http.Handler {
+	return h2c.NewHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		mux := http.NewServeMux()
+		mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+			w.Write([]byte("hello http"))
+		})
+
+		if r.ProtoMajor == 2 && strings.Contains(r.Header.Get("Content-Type"), "application/grpc") {
+			grpcServer.ServeHTTP(w, r)
+		} else {
+			mux.ServeHTTP(w, r)
+		}
+	}), &http2.Server{})
+}
+
 func main() {
 	flag.Parse()
 
@@ -226,9 +247,11 @@ func main() {
 			log.Fatalf("failed to listen: %v", err)
 		}
 		s := grpc.NewServer()
+
 		reflection.Register(s)
 		pb.RegisterGreeterServer(s, &server{})
 		pb.RegisterTestImportServer(s, &server{})
+
 		if err := s.Serve(lis); err != nil {
 			log.Fatalf("failed to serve: %v", err)
 		}
@@ -252,6 +275,24 @@ func main() {
 		}
 	}()
 
+	if grpcHTTPAddr != "" {
+		go func() {
+			lis, err := net.Listen("tcp", grpcHTTPAddr)
+			if err != nil {
+				log.Fatalf("failed to listen: %v", err)
+			}
+			s := grpc.NewServer()
+
+			reflection.Register(s)
+			pb.RegisterGreeterServer(s, &server{})
+			pb.RegisterTestImportServer(s, &server{})
+
+			if err := http.Serve(lis, gRPCAndHTTPFunc(s)); err != nil {
+				log.Fatalf("failed to serve grpc: %v", err)
+			}
+		}()
+	}
+
 	if grpcsMtlsAddr != "" {
 		go func() {
 			lis, err := net.Listen("tcp", grpcsMtlsAddr)

t/node/upstream-keepalive-pool.t

@@ -734,3 +734,74 @@ qr/lua balancer: keepalive create pool, .*/
 qr/^lua balancer: keepalive create pool, crc32: \S+, size: 4
 lua balancer: keepalive create pool, crc32: \S+, size: 8
 $/
+
+
+
+=== TEST 16: backend serve http and grpc with the same port
+--- config
+    location /t {
+        content_by_lua_block {
+            local t = require("lib.test_admin")
+            local test = require("lib.test_admin").test
+            local json = require("toolkit.json")
+
+            local data = {
+                uri = "",
+                upstream = {
+                    scheme = "",
+                    type = "roundrobin",
+                    nodes = {
+                        ["127.0.0.1:50054"] = 1,
+                    },
+                    keepalive_pool = {
+                        size = 4
+                    }
+                }
+            }
+
+            data.uri = "/helloworld.Greeter/SayHello"
+            data.upstream.scheme = "grpc"
+            local code, body = test('/apisix/admin/routes/1',
+                ngx.HTTP_PUT,
+                json.encode(data)
+            )
+            if code >= 300 then
+                ngx.status = code
+                ngx.print(body)
+                return
+            end
+
+            data.uri = "/hello"
+            data.upstream.scheme = "http"
+            local code, body = test('/apisix/admin/routes/2',
+                ngx.HTTP_PUT,
+                json.encode(data)
+            )
+            if code >= 300 then
+                ngx.status = code
+                ngx.print(body)
+                return
+            end
+
+        }
+    }
+--- response_body
+
+
+
+=== TEST 17: hit http
+--- request
+GET /hello
+--- response_body chomp
+hello http
+
+
+
+=== TEST 18: hit grpc
+--- http2
+--- exec
+grpcurl -import-path ./t/grpc_server_example/proto -proto helloworld.proto -plaintext -d '{"name":"apisix"}' 127.0.0.1:1984 helloworld.Greeter.SayHello
+--- response_body
+{
+  "message": "Hello apisix"
+}