Merge pull request #1235 from tcoupin/feat-use-docker-compose-labels

Use docker-compose labels for frontend and backend names

docs/toml.md

@@ -823,7 +823,7 @@ Labels can be used on containers to override default behaviour:
 - `traefik.protocol=https`: override the default `http` protocol
 - `traefik.weight=10`: assign this weight to the container
 - `traefik.enable=false`: disable this container in Træfɪk
-- `traefik.frontend.rule=Host:test.traefik.io`: override the default frontend rule (Default: `Host:{containerName}.{domain}`).
+- `traefik.frontend.rule=Host:test.traefik.io`: override the default frontend rule (Default: `Host:{containerName}.{domain}` or `Host:{service}.{project_name}.{domain}` if you are using `docker-compose`).
 - `traefik.frontend.passHostHeader=true`: forward client `Host` header to the backend.
 - `traefik.frontend.priority=10`: override default frontend priority
 - `traefik.frontend.entryPoints=http,https`: assign this frontend to entry points `http` and `https`. Overrides `defaultEntryPoints`.

provider/docker.go

@@ -525,6 +525,10 @@ func (provider *Docker) getFrontendRule(container dockerData) string {
 	if label, err := getLabel(container, "traefik.frontend.rule"); err == nil {
 		return label
 	}
+	if labels, err := getLabels(container, []string{"com.docker.compose.project", "com.docker.compose.service"}); err == nil {
+		return "Host:" + provider.getSubDomain(labels["com.docker.compose.service"]+"."+labels["com.docker.compose.project"]) + "." + provider.Domain
+	}
+
 	return "Host:" + provider.getSubDomain(container.ServiceName) + "." + provider.Domain
 }
 
@@ -532,6 +536,9 @@ func (provider *Docker) getBackend(container dockerData) string {
 	if label, err := getLabel(container, "traefik.backend"); err == nil {
 		return normalize(label)
 	}
+	if labels, err := getLabels(container, []string{"com.docker.compose.project", "com.docker.compose.service"}); err == nil {
+		return normalize(labels["com.docker.compose.service"] + "_" + labels["com.docker.compose.project"])
+	}
 	return normalize(container.ServiceName)
 }
 

provider/docker_test.go

@@ -44,6 +44,20 @@ func TestDockerGetFrontendName(t *testing.T) {
 			},
 			expected: "Headers-User-Agent-bat-0-1-0",
 		},
+		{
+			container: docker.ContainerJSON{
+				ContainerJSONBase: &docker.ContainerJSONBase{
+					Name: "mycontainer",
+				},
+				Config: &container.Config{
+					Labels: map[string]string{
+						"com.docker.compose.project": "foo",
+						"com.docker.compose.service": "bar",
+					},
+				},
+			},
+			expected: "Host-bar-foo-docker-localhost",
+		},
 		{
 			container: docker.ContainerJSON{
 				ContainerJSONBase: &docker.ContainerJSONBase{
@@ -133,6 +147,19 @@ func TestDockerGetFrontendRule(t *testing.T) {
 				},
 			},
 			expected: "Host:foo.bar",
+		}, {
+			container: docker.ContainerJSON{
+				ContainerJSONBase: &docker.ContainerJSONBase{
+					Name: "test",
+				},
+				Config: &container.Config{
+					Labels: map[string]string{
+						"com.docker.compose.project": "foo",
+						"com.docker.compose.service": "bar",
+					},
+				},
+			},
+			expected: "Host:bar.foo.docker.localhost",
 		},
 		{
 			container: docker.ContainerJSON{
@@ -196,6 +223,20 @@ func TestDockerGetBackend(t *testing.T) {
 			},
 			expected: "foobar",
 		},
+		{
+			container: docker.ContainerJSON{
+				ContainerJSONBase: &docker.ContainerJSONBase{
+					Name: "test",
+				},
+				Config: &container.Config{
+					Labels: map[string]string{
+						"com.docker.compose.project": "foo",
+						"com.docker.compose.service": "bar",
+					},
+				},
+			},
+			expected: "bar-foo",
+		},
 	}
 
 	for _, e := range containers {