mirror of https://github.com/k3s-io/k3s
137 lines
4.2 KiB
Go
137 lines
4.2 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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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/spf13/cobra"
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"k8s.io/kubernetes/pkg/kubectl"
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"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
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cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
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"k8s.io/kubernetes/pkg/kubectl/util/i18n"
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)
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var (
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deploymentLong = templates.LongDesc(i18n.T(`
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Create a deployment with the specified name.`))
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deploymentExample = templates.Examples(i18n.T(`
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# Create a new deployment named my-dep that runs the busybox image.
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kubectl create deployment my-dep --image=busybox`))
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)
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// NewCmdCreateDeployment is a macro command to create a new deployment.
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// This command is better known to users as `kubectl create deployment`.
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// Note that this command overlaps significantly with the `kubectl run` command.
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func NewCmdCreateDeployment(f cmdutil.Factory, cmdOut, cmdErr io.Writer) *cobra.Command {
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cmd := &cobra.Command{
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Use: "deployment NAME --image=image [--dry-run]",
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Aliases: []string{"deploy"},
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Short: i18n.T("Create a deployment with the specified name."),
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Long: deploymentLong,
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Example: deploymentExample,
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Run: func(cmd *cobra.Command, args []string) {
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err := createDeployment(f, cmdOut, cmdErr, cmd, args)
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cmdutil.CheckErr(err)
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},
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}
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cmdutil.AddApplyAnnotationFlags(cmd)
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cmdutil.AddValidateFlags(cmd)
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cmdutil.AddPrinterFlags(cmd)
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cmdutil.AddGeneratorFlags(cmd, cmdutil.DeploymentBasicV1Beta1GeneratorName)
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cmd.Flags().StringSlice("image", []string{}, "Image name to run.")
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cmd.MarkFlagRequired("image")
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return cmd
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}
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// generatorFromName returns the appropriate StructuredGenerator based on the
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// generatorName. If the generatorName is unrecognized, then return (nil,
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// false).
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func generatorFromName(
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generatorName string,
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imageNames []string,
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deploymentName string,
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) (kubectl.StructuredGenerator, bool) {
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switch generatorName {
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case cmdutil.DeploymentBasicAppsV1Beta1GeneratorName:
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generator := &kubectl.DeploymentBasicAppsGeneratorV1{
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BaseDeploymentGenerator: kubectl.BaseDeploymentGenerator{
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Name: deploymentName,
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Images: imageNames,
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},
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}
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return generator, true
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case cmdutil.DeploymentBasicV1Beta1GeneratorName:
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generator := &kubectl.DeploymentBasicGeneratorV1{
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BaseDeploymentGenerator: kubectl.BaseDeploymentGenerator{
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Name: deploymentName,
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Images: imageNames,
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},
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}
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return generator, true
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}
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return nil, false
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}
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// createDeployment
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// 1. Reads user config values from Cobra.
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// 2. Sets up the correct Generator object.
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// 3. Calls RunCreateSubcommand.
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func createDeployment(f cmdutil.Factory, cmdOut, cmdErr io.Writer,
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cmd *cobra.Command, args []string) error {
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deploymentName, err := NameFromCommandArgs(cmd, args)
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if err != nil {
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return err
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}
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clientset, err := f.ClientSet()
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if err != nil {
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return err
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}
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resourcesList, err := clientset.Discovery().ServerResources()
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// ServerResources ignores errors for old servers do not expose discovery
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if err != nil {
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return fmt.Errorf("failed to discover supported resources: %v", err)
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}
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generatorName := cmdutil.GetFlagString(cmd, "generator")
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// It is possible we have to modify the user-provided generator name if
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// the server does not have support for the requested generator.
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generatorName = cmdutil.FallbackGeneratorNameIfNecessary(generatorName, resourcesList, cmdErr)
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imageNames := cmdutil.GetFlagStringSlice(cmd, "image")
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generator, ok := generatorFromName(generatorName, imageNames, deploymentName)
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if !ok {
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return errUnsupportedGenerator(cmd, generatorName)
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}
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return RunCreateSubcommand(f, cmd, cmdOut, &CreateSubcommandOptions{
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Name: deploymentName,
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StructuredGenerator: generator,
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DryRun: cmdutil.GetDryRunFlag(cmd),
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OutputFormat: cmdutil.GetFlagString(cmd, "output"),
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})
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}
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