Add "create deployment" sub-command

pkg/kubectl/deployment.go

@@ -0,0 +1,107 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+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 kubectl
+
+import (
+	"fmt"
+	"strings"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/apis/extensions"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+// DeploymentGeneratorV1 supports stable generation of a deployment
+type DeploymentBasicGeneratorV1 struct {
+	Name   string
+	Images []string
+}
+
+// Ensure it supports the generator pattern that uses parameters specified during construction
+var _ StructuredGenerator = &DeploymentBasicGeneratorV1{}
+
+func (DeploymentBasicGeneratorV1) ParamNames() []GeneratorParam {
+	return []GeneratorParam{
+		{"name", true},
+		{"image", true},
+	}
+}
+
+func (s DeploymentBasicGeneratorV1) Generate(params map[string]interface{}) (runtime.Object, error) {
+	err := ValidateParams(s.ParamNames(), params)
+	if err != nil {
+		return nil, err
+	}
+	name, isString := params["name"].(string)
+	if !isString {
+		return nil, fmt.Errorf("expected string, saw %v for 'name'", name)
+	}
+	imageStrings, isArray := params["image"].([]string)
+	if !isArray {
+		return nil, fmt.Errorf("expected []string, found :%v", imageStrings)
+	}
+	delegate := &DeploymentBasicGeneratorV1{Name: name, Images: imageStrings}
+	return delegate.StructuredGenerate()
+}
+
+// StructuredGenerate outputs a deployment object using the configured fields
+func (s *DeploymentBasicGeneratorV1) StructuredGenerate() (runtime.Object, error) {
+	if err := s.validate(); err != nil {
+		return nil, err
+	}
+
+	podSpec := api.PodSpec{Containers: []api.Container{}}
+	for _, imageString := range s.Images {
+		imageSplit := strings.Split(imageString, "/")
+		name := imageSplit[len(imageSplit)-1]
+		podSpec.Containers = append(podSpec.Containers, api.Container{Name: name, Image: imageString})
+	}
+
+	// setup default label and selector
+	labels := map[string]string{}
+	labels["app"] = s.Name
+	selector := unversioned.LabelSelector{MatchLabels: labels}
+	deployment := extensions.Deployment{
+		ObjectMeta: api.ObjectMeta{
+			Name:   s.Name,
+			Labels: labels,
+		},
+		Spec: extensions.DeploymentSpec{
+			Replicas: 1,
+			Selector: &selector,
+			Template: api.PodTemplateSpec{
+				ObjectMeta: api.ObjectMeta{
+					Labels: labels,
+				},
+				Spec: podSpec,
+			},
+		},
+	}
+	return &deployment, nil
+}
+
+// validate validates required fields are set to support structured generation
+func (s *DeploymentBasicGeneratorV1) validate() error {
+	if len(s.Name) == 0 {
+		return fmt.Errorf("name must be specified")
+	}
+	if len(s.Images) == 0 {
+		return fmt.Errorf("at least one image must be specified")
+	}
+	return nil
+}