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91 lines
3.4 KiB
Go
91 lines
3.4 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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)
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var (
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pdbLong = templates.LongDesc(`
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Create a pod disruption budget with the specified name, selector, and desired minimum available pods`)
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pdbExample = templates.Examples(`
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# Create a pod disruption budget named my-pdb that will select all pods with the app=rails label
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# and require at least one of them being available at any point in time.
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kubectl create poddisruptionbudget my-pdb --selector=app=rails --min-available=1
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# Create a pod disruption budget named my-pdb that will select all pods with the app=nginx label
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# and require at least half of the pods selected to be available at any point in time.
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kubectl create pdb my-pdb --selector=app=nginx --min-available=50%`)
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)
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// NewCmdCreatePodDisruptionBudget is a macro command to create a new pod disruption budget.
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func NewCmdCreatePodDisruptionBudget(f cmdutil.Factory, cmdOut io.Writer) *cobra.Command {
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cmd := &cobra.Command{
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Use: "poddisruptionbudget NAME --selector=SELECTOR --min-available=N [--dry-run]",
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Aliases: []string{"pdb"},
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Short: "Create a pod disruption budget with the specified name.",
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Long: pdbLong,
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Example: pdbExample,
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Run: func(cmd *cobra.Command, args []string) {
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err := CreatePodDisruptionBudget(f, cmdOut, 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.PodDisruptionBudgetV1GeneratorName)
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cmd.Flags().String("min-available", "1", "The minimum number or percentage of available pods this budget requires.")
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cmd.Flags().String("selector", "", "A label selector to use for this budget. Only equality-based selector requirements are supported.")
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return cmd
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}
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// CreatePodDisruptionBudget implements the behavior to run the create pdb command.
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func CreatePodDisruptionBudget(f cmdutil.Factory, cmdOut io.Writer, cmd *cobra.Command, args []string) error {
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name, 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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var generator kubectl.StructuredGenerator
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switch generatorName := cmdutil.GetFlagString(cmd, "generator"); generatorName {
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case cmdutil.PodDisruptionBudgetV1GeneratorName:
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generator = &kubectl.PodDisruptionBudgetV1Generator{
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Name: name,
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MinAvailable: cmdutil.GetFlagString(cmd, "min-available"),
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Selector: cmdutil.GetFlagString(cmd, "selector"),
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}
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default:
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return cmdutil.UsageError(cmd, fmt.Sprintf("Generator: %s not supported.", generatorName))
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}
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return RunCreateSubcommand(f, cmd, cmdOut, &CreateSubcommandOptions{
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Name: name,
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StructuredGenerator: generator,
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DryRun: cmdutil.GetFlagBool(cmd, "dry-run"),
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OutputFormat: cmdutil.GetFlagString(cmd, "output"),
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})
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}
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