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* feature: create evict pod binary
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,4 @@ | ||
| bin | ||
| .DS_Store | ||
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| dist/ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package main | ||
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| import ( | ||
| "os" | ||
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| "github.com/dhenkel92/kubectl-pdb/pkg/cmd" | ||
| "github.com/spf13/cobra" | ||
| "github.com/spf13/pflag" | ||
| "k8s.io/cli-runtime/pkg/genericclioptions" | ||
| ) | ||
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| func main() { | ||
| flags := pflag.NewFlagSet("kubectl-evict", pflag.ExitOnError) | ||
| pflag.CommandLine = flags | ||
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| conf := genericclioptions.NewConfigFlags(true) | ||
| conf.AddFlags(flags) | ||
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| streams := genericclioptions.IOStreams{In: os.Stdin, Out: os.Stdout, ErrOut: os.Stderr} | ||
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| rootCmd := &cobra.Command{ | ||
| Use: "evict", | ||
| Short: "Utility to evict a pod from a node", | ||
| } | ||
| rootCmd.AddCommand(cmd.NewCmdEvictPod(streams, conf)) | ||
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| if err := rootCmd.Execute(); err != nil { | ||
| os.Exit(1) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| package cmd | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
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| "github.com/dhenkel92/kubectl-pdb/pkg/kube" | ||
| "github.com/dhenkel92/kubectl-pdb/pkg/utils" | ||
| "github.com/spf13/cobra" | ||
| policyv1 "k8s.io/api/policy/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/cli-runtime/pkg/genericclioptions" | ||
| "k8s.io/cli-runtime/pkg/printers" | ||
| ) | ||
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| type EvictPodOptions struct { | ||
| genericclioptions.IOStreams | ||
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| configFlags *genericclioptions.ConfigFlags | ||
| Namespace string | ||
| PodName string | ||
| DryRun bool | ||
| Output string | ||
| } | ||
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| func NewEvictPodOptions(streams genericclioptions.IOStreams, configFlags *genericclioptions.ConfigFlags) *EvictPodOptions { | ||
| return &EvictPodOptions{ | ||
| IOStreams: streams, | ||
| configFlags: configFlags, | ||
| } | ||
| } | ||
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| func NewCmdEvictPod(streams genericclioptions.IOStreams, configFlags *genericclioptions.ConfigFlags) *cobra.Command { | ||
| o := NewEvictPodOptions(streams, configFlags) | ||
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| cmd := &cobra.Command{ | ||
| Use: "pod <pod_name>", | ||
| Short: "Utility to evict a pod from a node", | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
| if err := o.Complete(cmd, args); err != nil { | ||
| return err | ||
| } | ||
| if err := o.Validate(); err != nil { | ||
| return err | ||
| } | ||
| if err := o.Run(); err != nil { | ||
| return utils.HandleRunError(streams, err) | ||
| } | ||
| return nil | ||
| }, | ||
| } | ||
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| cmd.Flags().StringVarP(&o.Output, "output", "o", "json", "Output format. One of: json|yaml") | ||
| cmd.Flags().BoolVar(&o.DryRun, "dry-run", true, "If true, only print the object that would be sent, without sending it.") | ||
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| return cmd | ||
| } | ||
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| func (o *EvictPodOptions) Complete(cmd *cobra.Command, args []string) error { | ||
| var err error | ||
| if len(args) != 1 { | ||
| return fmt.Errorf("pod name is required") | ||
| } | ||
| o.PodName = args[0] | ||
|
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| o.Namespace, _, err = o.configFlags.ToRawKubeConfigLoader().Namespace() | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| return nil | ||
| } | ||
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| func (o *EvictPodOptions) GetPrinter() (printers.ResourcePrinter, error) { | ||
| switch o.Output { | ||
| case "json": | ||
| return &printers.JSONPrinter{}, nil | ||
| case "yaml": | ||
| return &printers.YAMLPrinter{}, nil | ||
| } | ||
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| return nil, fmt.Errorf("invalid output '%s'", o.Output) | ||
| } | ||
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| func (o *EvictPodOptions) Validate() error { | ||
| switch o.Output { | ||
| case "json", "yaml": | ||
| default: | ||
| return fmt.Errorf("invalid output '%s'", o.Output) | ||
| } | ||
|
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| return nil | ||
| } | ||
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| func (o *EvictPodOptions) Run() error { | ||
| ctx := context.Background() | ||
|
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| kubeClient, err := kube.New(o.configFlags) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| pod, err := kubeClient.GetClientset().CoreV1().Pods(o.Namespace).Get(ctx, o.PodName, metav1.GetOptions{}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| dryRunOpts := []string{} | ||
| if o.DryRun { | ||
| dryRunOpts = append(dryRunOpts, "All") | ||
| } | ||
|
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| eviction := policyv1.Eviction{ | ||
| TypeMeta: metav1.TypeMeta{ | ||
| Kind: "Eviction", | ||
| APIVersion: policyv1.SchemeGroupVersion.String(), | ||
| }, | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: pod.Name, | ||
| Namespace: pod.Namespace, | ||
| }, | ||
| DeleteOptions: &metav1.DeleteOptions{ | ||
| DryRun: dryRunOpts, | ||
| }, | ||
| } | ||
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| err = kubeClient.GetClientset().CoreV1().Pods(o.Namespace).EvictV1(ctx, &eviction) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| w := printers.GetNewTabWriter(o.Out) | ||
| printer, err := o.GetPrinter() | ||
| if err := printer.PrintObj(&eviction, w); err != nil { | ||
| return err | ||
| } | ||
|
|
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| return w.Flush() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| package utils | ||
|
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| import ( | ||
| "k8s.io/cli-runtime/pkg/genericclioptions" | ||
| "k8s.io/cli-runtime/pkg/printers" | ||
| ) | ||
|
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| func HandleRunError(streams genericclioptions.IOStreams, err error) error { | ||
| w := printers.GetNewTabWriter(streams.ErrOut) | ||
| w.Write([]byte(err.Error())) | ||
| return w.Flush() | ||
| } |