Build all UDP services on an entrypoint

integration/fixtures/service_errors.toml

@@ -20,11 +20,11 @@
 ## dynamic configuration ##
 
 [http.routers]
-  [http.routers.router4]
+  [http.routers.router1]
     service = "service1"
     rule = "Host(`snitest.net`)"
 
-  [http.routers.router5]
+  [http.routers.router2]
     service = "service2"
     rule = "Host(`snitest.com`)"
 
@@ -34,36 +34,4 @@
   [http.services.service2]
     [http.services.service2.loadBalancer]
       [[http.services.service2.loadBalancer.servers]]
-        url = "http://127.0.0.1:9010"
+        url = "http://127.0.0.1:9010"
-
-[tcp.routers]
-  [tcp.routers.router4]
-    service = "service1"
-    rule = "HostSNI(`snitest.net`)"
-
-  [tcp.routers.router5]
-    service = "service2"
-    rule = "HostSNI(`snitest.com`)"
-
-[tcp.services]
-  [tcp.services.service1]
-
-  [tcp.services.service2]
-    [tcp.services.service2.loadBalancer]
-      [[tcp.services.service2.loadBalancer.servers]]
-        address = "127.0.0.1:9010"
-
-[udp.routers]
-  [udp.routers.router4]
-    service = "service1"
-
-  [udp.routers.router5]
-    service = "service2"
-
-[udp.services]
-  [udp.services.service1]
-
-  [udp.services.service2]
-    [udp.services.service2.loadBalancer]
-      [[udp.services.service2.loadBalancer.servers]]
-        address = "127.0.0.1:9010"

integration/fixtures/tcp/service_errors.toml

@@ -0,0 +1,37 @@
+[global]
+  checkNewVersion = false
+  sendAnonymousUsage = false
+
+[log]
+  level = "DEBUG"
+
+[entryPoints]
+  [entryPoints.websecure]
+    address = ":4443"
+  [entryPoints.udp]
+    address = ":4443/udp"
+
+[api]
+  insecure = true
+
+[providers.file]
+  filename = "{{ .SelfFilename }}"
+
+## dynamic configuration ##
+
+[tcp.routers]
+  [tcp.routers.router1]
+    service = "service1"
+    rule = "HostSNI(`snitest.net`)"
+
+  [tcp.routers.router2]
+    service = "service2"
+    rule = "HostSNI(`snitest.com`)"
+
+[tcp.services]
+  [tcp.services.service1]
+
+  [tcp.services.service2]
+    [tcp.services.service2.loadBalancer]
+      [[tcp.services.service2.loadBalancer.servers]]
+        address = "127.0.0.1:9010"

integration/fixtures/udp/service_errors.toml

@@ -0,0 +1,35 @@
+[global]
+  checkNewVersion = false
+  sendAnonymousUsage = false
+
+[log]
+  level = "DEBUG"
+
+[entryPoints]
+  [entryPoints.websecure]
+    address = ":4443"
+  [entryPoints.udp]
+    address = ":4443/udp"
+
+[api]
+  insecure = true
+
+[providers.file]
+  filename = "{{ .SelfFilename }}"
+
+## dynamic configuration ##
+
+[udp.routers]
+  [udp.routers.router1]
+    service = "service1"
+
+  [udp.routers.router2]
+    service = "service2"
+
+[udp.services]
+  [udp.services.service1]
+
+  [udp.services.service2]
+    [udp.services.service2.loadBalancer]
+      [[udp.services.service2.loadBalancer.servers]]
+        address = "127.0.0.1:9010"

integration/simple_test.go

@@ -570,7 +570,7 @@ func (s *SimpleSuite) TestTCPRouterConfigErrors(c *check.C) {
 }
 
 func (s *SimpleSuite) TestTCPServiceConfigErrors(c *check.C) {
-	file := s.adaptFile(c, "fixtures/service_errors.toml", struct{}{})
+	file := s.adaptFile(c, "fixtures/tcp/service_errors.toml", struct{}{})
 	defer os.Remove(file)
 
 	cmd, output := s.traefikCmd(withConfigFile(file))
@@ -606,7 +606,7 @@ func (s *SimpleSuite) TestUDPRouterConfigErrors(c *check.C) {
 }
 
 func (s *SimpleSuite) TestUDPServiceConfigErrors(c *check.C) {
-	file := s.adaptFile(c, "fixtures/service_errors.toml", struct{}{})
+	file := s.adaptFile(c, "fixtures/udp/service_errors.toml", struct{}{})
 	defer os.Remove(file)
 
 	cmd, output := s.traefikCmd(withConfigFile(file))
@@ -616,7 +616,7 @@ func (s *SimpleSuite) TestUDPServiceConfigErrors(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	defer cmd.Process.Kill()
 
-	err = try.GetRequest("http://127.0.0.1:8080/api/udp/services", 3000*time.Millisecond, try.BodyContains(`["the udp service \"service1@file\" does not have any type defined"]`))
+	err = try.GetRequest("http://127.0.0.1:8080/api/udp/services", 1000*time.Millisecond, try.BodyContains(`["the udp service \"service1@file\" does not have any type defined"]`))
 	c.Assert(err, checker.IsNil)
 
 	err = try.GetRequest("http://127.0.0.1:8080/api/udp/services/service1@file", 1000*time.Millisecond, try.BodyContains(`"status":"disabled"`))

pkg/server/router/udp/router.go

@@ -3,6 +3,7 @@ package udp
 import (
 	"context"
 	"errors"
+	"sort"
 
 	"github.com/containous/traefik/v2/pkg/config/runtime"
 	"github.com/containous/traefik/v2/pkg/log"
@@ -47,23 +48,39 @@ func (m *Manager) BuildHandlers(rootCtx context.Context, entryPoints []string) m
 
 		ctx := log.With(rootCtx, log.Str(log.EntryPointName, entryPointName))
 
-		handler, err := m.buildEntryPointHandler(ctx, routers)
+		if len(routers) > 1 {
+			log.FromContext(ctx).Warn("Config has more than one udp router for a given entrypoint.")
+		}
+
+		handlers, err := m.buildEntryPointHandlers(ctx, routers)
 		if err != nil {
 			log.FromContext(ctx).Error(err)
 			continue
 		}
-		entryPointHandlers[entryPointName] = handler
+
+		if len(handlers) > 0 {
+			// As UDP support only one router per entrypoint, we only take the first one.
+			entryPointHandlers[entryPointName] = handlers[0]
+		}
 	}
 	return entryPointHandlers
 }
 
-func (m *Manager) buildEntryPointHandler(ctx context.Context, configs map[string]*runtime.UDPRouterInfo) (udp.Handler, error) {
+func (m *Manager) buildEntryPointHandlers(ctx context.Context, configs map[string]*runtime.UDPRouterInfo) ([]udp.Handler, error) {
-	logger := log.FromContext(ctx)
+	var rtNames []string
-
+	for routerName := range configs {
-	if len(configs) > 1 {
+		rtNames = append(rtNames, routerName)
-		logger.Warn("Warning: config has more than one udp router for a given entrypoint")
 	}
-	for routerName, routerConfig := range configs {
+
+	sort.Slice(rtNames, func(i, j int) bool {
+		return rtNames[i] > rtNames[j]
+	})
+
+	var handlers []udp.Handler
+
+	for _, routerName := range rtNames {
+		routerConfig := configs[routerName]
+
 		ctxRouter := log.With(provider.AddInContext(ctx, routerName), log.Str(log.RouterName, routerName))
 		logger := log.FromContext(ctxRouter)
 
@@ -80,8 +97,9 @@ func (m *Manager) buildEntryPointHandler(ctx context.Context, configs map[string
 			logger.Error(err)
 			continue
 		}
-		return handler, nil
+
+		handlers = append(handlers, handler)
 	}
 
-	return nil, nil
+	return handlers, nil
 }