Merge pull request #277 from surajssd/generic-service-type

Generic service type handler for kompose

pkg/kobject/kobject.go

@@ -143,6 +143,7 @@ type ServiceConfig struct {
 	Restart       string
 	User          string
 	VolumesFrom   []string
+	ServiceType   string
 }
 
 // EnvVar holds the environment variable struct of a container

pkg/loader/compose/compose.go

@@ -207,6 +207,16 @@ func (c *Compose) LoadFile(file string) kobject.KomposeObject {
 				}
 			}
 
+			// canonical "Custom Labels" handler
+			// Labels used to influence conversion of kompose will be handled
+			// from here for docker-compose. Each loader will have such handler.
+			for key, value := range composeServiceConfig.Labels {
+				switch key {
+				case "kompose.service.type":
+					serviceConfig.ServiceType = handleServiceType(value)
+				}
+			}
+
 			// convert compose labels to annotations
 			serviceConfig.Annotations = map[string]string(composeServiceConfig.Labels)
 
@@ -227,3 +237,17 @@ func (c *Compose) LoadFile(file string) kobject.KomposeObject {
 
 	return komposeObject
 }
+
+func handleServiceType(ServiceType string) string {
+	switch strings.ToLower(ServiceType) {
+	case "", "clusterip":
+		return string(api.ServiceTypeClusterIP)
+	case "nodeport":
+		return string(api.ServiceTypeNodePort)
+	case "loadbalancer":
+		return string(api.ServiceTypeLoadBalancer)
+	default:
+		logrus.Fatalf("Unknown value '%s', supported values are 'NodePort, ClusterIP or LoadBalancer'", ServiceType)
+		return ""
+	}
+}

pkg/loader/compose/compose_test.go

@@ -0,0 +1,43 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package compose
+
+import "testing"
+
+// Test if service types are parsed properly on user input
+// give a service type and expect correct input
+func TestHandleServiceType(t *testing.T) {
+	tests := []struct {
+		labelValue  string
+		serviceType string
+	}{
+		{"NodePort", "NodePort"},
+		{"nodeport", "NodePort"},
+		{"LoadBalancer", "LoadBalancer"},
+		{"loadbalancer", "LoadBalancer"},
+		{"ClusterIP", "ClusterIP"},
+		{"clusterip", "ClusterIP"},
+		{"", "ClusterIP"},
+	}
+
+	for _, tt := range tests {
+		result := handleServiceType(tt.labelValue)
+		if result != tt.serviceType {
+			t.Errorf("Expected %q, got %q", tt.serviceType, result)
+		}
+	}
+}

pkg/transformer/kubernetes/k8sutils.go

@@ -244,21 +244,7 @@ func (k *Kubernetes) CreateService(name string, service kobject.ServiceConfig, o
 	servicePorts := k.ConfigServicePorts(name, service)
 	svc.Spec.Ports = servicePorts
 
-	// Configure service types
-	for key, value := range service.Annotations {
-		if key == "kompose.service.type" {
-			if strings.ToLower(value) == "nodeport" {
-				svc.Spec.Type = "NodePort"
-			} else if strings.ToLower(value) == "clusterip" {
-				svc.Spec.Type = "ClusterIP"
-			} else if strings.ToLower(value) == "loadbalancer" {
-				svc.Spec.Type = "LoadBalancer"
-			} else {
-				logrus.Fatalf("Unknown value '%s', supported values are 'NodePort, ClusterIP and LoadBalancer' " , value)
-			}
-		}
-	}
-
+	svc.Spec.Type = api.ServiceType(service.ServiceType)
 	// Configure annotations
 	annotations := transformer.ConfigAnnotations(service)
 	svc.ObjectMeta.Annotations = annotations

pkg/transformer/kubernetes/k8sutils_test.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2016 Skippbox, Ltd All rights reserved.
+Copyright 2016 The Kubernetes Authors All rights reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -17,9 +17,10 @@ limitations under the License.
 package kubernetes
 
 import (
+	"testing"
+
 	"github.com/kubernetes-incubator/kompose/pkg/kobject"
 	"k8s.io/kubernetes/pkg/api"
-	"testing"
 )
 
 /*
@@ -64,63 +65,3 @@ func TestCreateService(t *testing.T) {
 		t.Errorf("Expected port 123 upon conversion, actual %d", svc.Spec.Ports[0].Port)
 	}
 }
-
-/*
-	Test the creation of a service with a specified annotation (kompose.service.type) as "nodeport".
-	The expected result is that Kompose will convert the spec type to "NodePort" upon generation.
-*/
-func TestCreateServiceWithServiceTypeNodePort(t *testing.T) {
-
-	// An example service
-	service := kobject.ServiceConfig{
-		ContainerName: "name",
-		Image:         "image",
-		Environment:   []kobject.EnvVar{kobject.EnvVar{Name: "env", Value: "value"}},
-		Port:          []kobject.Ports{kobject.Ports{HostPort: 123, ContainerPort: 456, Protocol: api.ProtocolTCP}},
-		Command:       []string{"cmd"},
-		WorkingDir:    "dir",
-		Args:          []string{"arg1", "arg2"},
-		Volumes:       []string{"/tmp/volume"},
-		Network:       []string{"network1", "network2"}, // not supported
-		Labels:        nil,
-		Annotations:   map[string]string{"kompose.service.type": "nodeport"},
-		CPUSet:        "cpu_set",            // not supported
-		CPUShares:     1,                    // not supported
-		CPUQuota:      1,                    // not supported
-		CapAdd:        []string{"cap_add"},  // not supported
-		CapDrop:       []string{"cap_drop"}, // not supported
-		Expose:        []string{"expose"},   // not supported
-		Privileged:    true,
-		Restart:       "always",
-		User:          "user", // not supported
-	}
-
-	// An example object generated via k8s runtime.Objects()
-	kompose_object := kobject.KomposeObject{
-		ServiceConfigs: map[string]kobject.ServiceConfig{"app": service},
-	}
-	k := Kubernetes{}
-	tests := []struct {
-		labelValue  string
-		serviceType string
-	}{
-		{"NodePort", "NodePort"},
-		{"nodeport", "NodePort"},
-		{"LoadBalancer", "LoadBalancer"},
-		{"loadbalancer", "LoadBalancer"},
-		{"ClusterIP", "ClusterIP"},
-		{"clusterip", "ClusterIP"},
-	}
-
-	for _, tt := range tests {
-		kompose_object.ServiceConfigs["app"].Annotations["kompose.service.type"] = tt.labelValue
-
-		objects := k.Transform(kompose_object, kobject.ConvertOptions{CreateD: true, Replicas: 3})
-
-		// Test the creation of the service with modified annotations (kompose.service.type)
-		svc := k.CreateService("foo", service, objects)
-		if svc.Spec.Type != api.ServiceType(tt.serviceType) {
-			t.Errorf("Expected NodePort, actual %d", svc.Spec.Type)
-		}
-	}
-}