Fix multiple frontends with docker-compose --scale

integration/docker_compose_test.go

@@ -0,0 +1,78 @@
+package integration
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/containous/traefik/integration/try"
+	"github.com/containous/traefik/testhelpers"
+	"github.com/containous/traefik/types"
+	"github.com/go-check/check"
+	checker "github.com/vdemeester/shakers"
+)
+
+const (
+	composeProject = "minimal"
+)
+
+// Docker test suites
+type DockerComposeSuite struct {
+	BaseSuite
+}
+
+func (s *DockerComposeSuite) SetUpSuite(c *check.C) {
+	s.createComposeProject(c, composeProject)
+	s.composeProject.Start(c)
+}
+
+func (s *DockerComposeSuite) TearDownSuite(c *check.C) {
+	// shutdown and delete compose project
+	if s.composeProject != nil {
+		s.composeProject.Stop(c)
+	}
+}
+
+func (s *DockerComposeSuite) TestComposeScale(c *check.C) {
+	var serviceCount = 2
+	var composeService = "whoami1"
+
+	s.composeProject.Scale(c, composeService, serviceCount)
+
+	file := s.adaptFileForHost(c, "fixtures/docker/simple.toml")
+	defer os.Remove(file)
+
+	cmd, display := s.traefikCmd(withConfigFile(file))
+	defer display(c)
+	err := cmd.Start()
+	c.Assert(err, checker.IsNil)
+	defer cmd.Process.Kill()
+
+	req := testhelpers.MustNewRequest(http.MethodGet, "http://127.0.0.1:8000/whoami", nil)
+	req.Host = "my.super.host"
+
+	_, err = try.ResponseUntilStatusCode(req, 1500*time.Millisecond, http.StatusOK)
+	c.Assert(err, checker.IsNil)
+
+	resp, err := http.Get("http://127.0.0.1:8080/api/providers/docker")
+	c.Assert(err, checker.IsNil)
+
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	c.Assert(err, checker.IsNil)
+
+	var provider types.Configuration
+	c.Assert(json.Unmarshal(body, &provider), checker.IsNil)
+
+	// check that we have only one backend with n servers
+	c.Assert(provider.Backends, checker.HasLen, 1)
+
+	myBackend := provider.Backends["backend-"+composeService+"-integrationtest"+composeProject]
+	c.Assert(myBackend, checker.NotNil)
+	c.Assert(myBackend.Servers, checker.HasLen, serviceCount)
+
+	// check that we have only one frontend
+	c.Assert(provider.Frontends, checker.HasLen, 1)
+}

integration/docker_test.go

@@ -99,7 +99,7 @@ func (s *DockerSuite) TestSimpleConfiguration(c *check.C) {
 	defer cmd.Process.Kill()
 
 	// TODO validate : run on 80
-	// Expected a 404 as we did not comfigure anything
+	// Expected a 404 as we did not configure anything
 	err = try.GetRequest("http://127.0.0.1:8000/", 500*time.Millisecond, try.StatusCodeIs(http.StatusNotFound))
 	c.Assert(err, checker.IsNil)
 }

integration/integration_test.go

@@ -41,6 +41,7 @@ func init() {
 		check.Suite(&ConstraintSuite{})
 		check.Suite(&ConsulCatalogSuite{})
 		check.Suite(&ConsulSuite{})
+		check.Suite(&DockerComposeSuite{})
 		check.Suite(&DockerSuite{})
 		check.Suite(&DynamoDBSuite{})
 		check.Suite(&EtcdSuite{})

integration/resources/compose/minimal.yml

@@ -0,0 +1,4 @@
+whoami1:
+  image: emilevauge/whoami
+  labels:
+    - traefik.frontend.rule=PathPrefix:/whoami

provider/docker/config.go

@@ -67,12 +67,13 @@ func (p *Provider) buildConfigurationV2(containersInspected []dockerData) *types
 			container.SegmentLabels = labels
 			container.SegmentName = segmentName
 
-			// Frontends
+			serviceNamesKey := getServiceNameKey(container, p.SwarmMode, segmentName)
-			if _, exists := serviceNames[container.ServiceName+segmentName]; !exists {
+
+			if _, exists := serviceNames[serviceNamesKey]; !exists {
 				frontendName := p.getFrontendName(container, idx)
 				frontends[frontendName] = append(frontends[frontendName], container)
-				if len(container.ServiceName+segmentName) > 0 {
+				if len(serviceNamesKey) > 0 {
-					serviceNames[container.ServiceName+segmentName] = struct{}{}
+					serviceNames[serviceNamesKey] = struct{}{}
 				}
 			}
 
@@ -104,6 +105,16 @@ func (p *Provider) buildConfigurationV2(containersInspected []dockerData) *types
 	return configuration
 }
 
+func getServiceNameKey(container dockerData, swarmMode bool, segmentName string) string {
+	serviceNameKey := container.ServiceName
+
+	if values, err := label.GetStringMultipleStrict(container.Labels, labelDockerComposeProject, labelDockerComposeService); !swarmMode && err == nil {
+		serviceNameKey = values[labelDockerComposeService] + values[labelDockerComposeProject]
+	}
+
+	return serviceNameKey + segmentName
+}
+
 func (p *Provider) containerFilter(container dockerData) bool {
 	if !label.IsEnabled(container.Labels, p.ExposedByDefault) {
 		log.Debugf("Filtering disabled container %s", container.Name)

provider/docker/config_container_docker_test.go

@@ -304,6 +304,95 @@ func TestDockerBuildConfiguration(t *testing.T) {
 				},
 			},
 		},
+		{
+			desc: "when docker compose scale with different compose service names",
+			containers: []docker.ContainerJSON{
+				containerJSON(
+					name("test_0"),
+					labels(map[string]string{
+						labelDockerComposeProject: "myProject",
+						labelDockerComposeService: "myService",
+					}),
+					ports(nat.PortMap{
+						"80/tcp": {},
+					}),
+					withNetwork("bridge", ipv4("127.0.0.1")),
+				),
+				containerJSON(
+					name("test_1"),
+					labels(map[string]string{
+						labelDockerComposeProject: "myProject",
+						labelDockerComposeService: "myService",
+					}),
+
+					ports(nat.PortMap{
+						"80/tcp": {},
+					}),
+
+					withNetwork("bridge", ipv4("127.0.0.2")),
+				),
+				containerJSON(
+					name("test_2"),
+					labels(map[string]string{
+						labelDockerComposeProject: "myProject",
+						labelDockerComposeService: "myService2",
+					}),
+
+					ports(nat.PortMap{
+						"80/tcp": {},
+					}),
+
+					withNetwork("bridge", ipv4("127.0.0.3")),
+				),
+			},
+			expectedFrontends: map[string]*types.Frontend{
+				"frontend-Host-myService-myProject-docker-localhost-0": {
+					Backend:        "backend-myService-myProject",
+					PassHostHeader: true,
+					EntryPoints:    []string{},
+					BasicAuth:      []string{},
+					Routes: map[string]types.Route{
+						"route-frontend-Host-myService-myProject-docker-localhost-0": {
+							Rule: "Host:myService.myProject.docker.localhost",
+						},
+					},
+				},
+				"frontend-Host-myService2-myProject-docker-localhost-2": {
+					Backend:        "backend-myService2-myProject",
+					PassHostHeader: true,
+					EntryPoints:    []string{},
+					BasicAuth:      []string{},
+					Routes: map[string]types.Route{
+						"route-frontend-Host-myService2-myProject-docker-localhost-2": {
+							Rule: "Host:myService2.myProject.docker.localhost",
+						},
+					},
+				},
+			},
+			expectedBackends: map[string]*types.Backend{
+				"backend-myService-myProject": {
+					Servers: map[string]types.Server{
+						"server-test-0": {
+							URL:    "http://127.0.0.1:80",
+							Weight: label.DefaultWeight,
+						}, "server-test-1": {
+							URL:    "http://127.0.0.2:80",
+							Weight: label.DefaultWeight,
+						},
+					},
+					CircuitBreaker: nil,
+				},
+				"backend-myService2-myProject": {
+					Servers: map[string]types.Server{
+						"server-test-2": {
+							URL:    "http://127.0.0.3:80",
+							Weight: label.DefaultWeight,
+						},
+					},
+					CircuitBreaker: nil,
+				},
+			},
+		},
 	}
 
 	for _, test := range testCases {

provider/docker/deprecated_config.go

@@ -125,11 +125,14 @@ func (p *Provider) buildConfigurationV1(containersInspected []dockerData) *types
 	servers := map[string][]dockerData{}
 	serviceNames := make(map[string]struct{})
 	for idx, container := range filteredContainers {
-		if _, exists := serviceNames[container.ServiceName]; !exists {
+
+		serviceNamesKey := getServiceNameKey(container, p.SwarmMode, "")
+
+		if _, exists := serviceNames[serviceNamesKey]; !exists {
 			frontendName := p.getFrontendNameV1(container, idx)
 			frontends[frontendName] = append(frontends[frontendName], container)
-			if len(container.ServiceName) > 0 {
+			if len(serviceNamesKey) > 0 {
-				serviceNames[container.ServiceName] = struct{}{}
+				serviceNames[serviceNamesKey] = struct{}{}
 			}
 		}
 		backendName := getBackendNameV1(container)