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121 lines
4.2 KiB
Go
121 lines
4.2 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cmd
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import (
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"fmt"
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"io"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl"
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cmdutil "github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd/util"
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"github.com/spf13/cobra"
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)
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const (
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run_long = `Create and run a particular image, possibly replicated.
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Creates a replication controller to manage the created container(s).`
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run_example = `// Starts a single instance of nginx.
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$ kubectl run-container nginx --image=nginx
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// Starts a replicated instance of nginx.
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$ kubectl run-container nginx --image=nginx --replicas=5
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// Dry run. Print the corresponding API objects without creating them.
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$ kubectl run-container nginx --image=nginx --dry-run
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// Start a single instance of nginx, but overload the desired state with a partial set of values parsed from JSON.
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$ kubectl run-container nginx --image=nginx --overrides='{ "apiVersion": "v1beta1", "desiredState": { ... } }'`
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)
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func NewCmdRunContainer(f *cmdutil.Factory, out io.Writer) *cobra.Command {
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cmd := &cobra.Command{
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Use: "run-container NAME --image=image [--port=port] [--replicas=replicas] [--dry-run=bool] [--overrides=inline-json]",
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Short: "Run a particular image on the cluster.",
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Long: run_long,
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Example: run_example,
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Run: func(cmd *cobra.Command, args []string) {
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err := RunRunContainer(f, out, cmd, args)
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cmdutil.CheckErr(err)
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},
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}
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cmdutil.AddPrinterFlags(cmd)
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cmd.Flags().String("generator", "run-container/v1", "The name of the API generator to use. Default is 'run-container-controller/v1'.")
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cmd.Flags().String("image", "", "The image for the container to run.")
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cmd.MarkFlagRequired("image")
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cmd.Flags().IntP("replicas", "r", 1, "Number of replicas to create for this container. Default is 1.")
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cmd.Flags().Bool("dry-run", false, "If true, only print the object that would be sent, without sending it.")
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cmd.Flags().String("overrides", "", "An inline JSON override for the generated object. If this is non-empty, it is used to override the generated object. Requires that the object supply a valid apiVersion field.")
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cmd.Flags().Int("port", -1, "The port that this container exposes.")
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cmd.Flags().Int("hostport", -1, "The host port mapping for the container port. To demonstrate a single-machine container.")
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cmd.Flags().StringP("labels", "l", "", "Labels to apply to the pod(s) created by this call to run-container.")
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return cmd
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}
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func RunRunContainer(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string) error {
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if len(args) != 1 {
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return cmdutil.UsageError(cmd, "NAME is required for run-container")
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}
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namespace, err := f.DefaultNamespace()
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if err != nil {
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return err
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}
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client, err := f.Client()
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if err != nil {
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return err
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}
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generatorName := cmdutil.GetFlagString(cmd, "generator")
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generator, found := kubectl.Generators[generatorName]
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if !found {
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return cmdutil.UsageError(cmd, fmt.Sprintf("Generator: %s not found.", generator))
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}
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names := generator.ParamNames()
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params := kubectl.MakeParams(cmd, names)
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params["name"] = args[0]
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err = kubectl.ValidateParams(names, params)
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if err != nil {
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return err
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}
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controller, err := generator.Generate(params)
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if err != nil {
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return err
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}
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inline := cmdutil.GetFlagString(cmd, "overrides")
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if len(inline) > 0 {
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controller, err = cmdutil.Merge(controller, inline, "ReplicationController")
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if err != nil {
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return err
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}
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}
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// TODO: extract this flag to a central location, when such a location exists.
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if !cmdutil.GetFlagBool(cmd, "dry-run") {
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controller, err = client.ReplicationControllers(namespace).Create(controller.(*api.ReplicationController))
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if err != nil {
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return err
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}
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}
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return f.PrintObject(cmd, controller, out)
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}
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