Add an initial run command

pkg/kubectl/cmd/run.go

@@ -0,0 +1,83 @@
+/*
+Copyright 2014 Google Inc. 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 cmd
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl"
+	"github.com/spf13/cobra"
+)
+
+func (f *Factory) NewCmdRunContainer(out io.Writer) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "run-container <name> --image=<image> [--replicas=replicas] [--dry-run=<bool>]",
+		Short: "Run a particular image on the cluster.",
+		Long: `Create and run a particular image, possibly replicated.
+Creates a replication controller to manage the created container(s)
+
+Examples:
+  $ kubectl run-container nginx --image=dockerfile/nginx
+  <starts a single instance of nginx>
+
+  $ kubectl run-container nginx --image=dockerfile/nginx --replicas=5
+  <starts a replicated instance of nginx>
+  
+  $ kubectl run-container nginx --image=dockerfile/nginx --dry-run
+  <just print the corresponding API objects, don't actually send them to the apiserver>`,
+		Run: func(cmd *cobra.Command, args []string) {
+			if len(args) != 1 {
+				usageError(cmd, "<name> is required for run")
+			}
+
+			namespace := GetKubeNamespace(cmd)
+			client, err := f.Client(cmd)
+			checkErr(err)
+
+			generatorName := GetFlagString(cmd, "generator")
+			generator, found := kubectl.Generators[generatorName]
+			if !found {
+				usageError(cmd, fmt.Sprintf("Generator: %s not found.", generator))
+			}
+			names := generator.ParamNames()
+			params, err := kubectl.MakeParams(cmd, names)
+			params["name"] = args[0]
+
+			err = kubectl.ValidateParams(names, params)
+			checkErr(err)
+
+			controller, err := generator.Generate(params)
+			checkErr(err)
+
+			// TODO: extract this flag to a central location, when such a location exists.
+			if !GetFlagBool(cmd, "dry-run") {
+				controller, err = client.ReplicationControllers(namespace).Create(controller.(*api.ReplicationController))
+				checkErr(err)
+			}
+			PrintObject(cmd, controller, f, out)
+		},
+	}
+	AddPrinterFlags(cmd)
+	cmd.Flags().String("generator", "run-container/v1", "The name of the api generator that you want to use.  Default 'run-container-controller-v1'")
+	cmd.Flags().String("image", "", "The image for the container you wish to run.")
+	cmd.Flags().IntP("replicas", "r", 1, "Number of replicas to create for this container. Default 1")
+	cmd.Flags().Bool("dry-run", false, "If true, only print the object that would be sent, don't actually do anything")
+	cmd.Flags().StringP("labels", "l", "", "Labels to apply to the pod(s) created by this call to run.")
+	return cmd
+}