mirror of https://github.com/k3s-io/k3s
319 lines
8.8 KiB
Go
319 lines
8.8 KiB
Go
/*
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Copyright 2018 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 create
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import (
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"context"
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"fmt"
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"github.com/spf13/cobra"
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batchv1 "k8s.io/api/batch/v1"
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batchv1beta1 "k8s.io/api/batch/v1beta1"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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"k8s.io/cli-runtime/pkg/resource"
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batchv1client "k8s.io/client-go/kubernetes/typed/batch/v1"
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batchv1beta1client "k8s.io/client-go/kubernetes/typed/batch/v1beta1"
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cmdutil "k8s.io/kubectl/pkg/cmd/util"
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"k8s.io/kubectl/pkg/scheme"
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"k8s.io/kubectl/pkg/util"
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"k8s.io/kubectl/pkg/util/i18n"
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"k8s.io/kubectl/pkg/util/templates"
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)
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var (
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cronjobLong = templates.LongDesc(i18n.T(`
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Create a cronjob with the specified name.`))
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cronjobExample = templates.Examples(`
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# Create a cronjob
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kubectl create cronjob my-job --image=busybox --schedule="*/1 * * * *"
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# Create a cronjob with command
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kubectl create cronjob my-job --image=busybox --schedule="*/1 * * * *" -- date`)
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)
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// CreateCronJobOptions is returned by NewCreateCronJobOptions
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type CreateCronJobOptions struct {
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PrintFlags *genericclioptions.PrintFlags
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PrintObj func(obj runtime.Object) error
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Name string
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Image string
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Schedule string
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Command []string
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Restart string
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Namespace string
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EnforceNamespace bool
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ClientBeta batchv1beta1client.BatchV1beta1Interface
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Client batchv1client.BatchV1Interface
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DryRunStrategy cmdutil.DryRunStrategy
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DryRunVerifier *resource.DryRunVerifier
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Builder *resource.Builder
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FieldManager string
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CreateAnnotation bool
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genericclioptions.IOStreams
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}
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// NewCreateCronJobOptions returns an initialized CreateCronJobOptions instance
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func NewCreateCronJobOptions(ioStreams genericclioptions.IOStreams) *CreateCronJobOptions {
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return &CreateCronJobOptions{
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PrintFlags: genericclioptions.NewPrintFlags("created").WithTypeSetter(scheme.Scheme),
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IOStreams: ioStreams,
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}
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}
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// NewCmdCreateCronJob is a command to create CronJobs.
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func NewCmdCreateCronJob(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command {
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o := NewCreateCronJobOptions(ioStreams)
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cmd := &cobra.Command{
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Use: "cronjob NAME --image=image --schedule='0/5 * * * ?' -- [COMMAND] [args...]",
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DisableFlagsInUseLine: false,
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Aliases: []string{"cj"},
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Short: cronjobLong,
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Long: cronjobLong,
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Example: cronjobExample,
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Run: func(cmd *cobra.Command, args []string) {
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cmdutil.CheckErr(o.Complete(f, cmd, args))
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cmdutil.CheckErr(o.Run())
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},
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}
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o.PrintFlags.AddFlags(cmd)
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cmdutil.AddApplyAnnotationFlags(cmd)
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cmdutil.AddValidateFlags(cmd)
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cmdutil.AddDryRunFlag(cmd)
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cmd.Flags().StringVar(&o.Image, "image", o.Image, "Image name to run.")
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cmd.MarkFlagRequired("image")
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cmd.Flags().StringVar(&o.Schedule, "schedule", o.Schedule, "A schedule in the Cron format the job should be run with.")
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cmd.MarkFlagRequired("schedule")
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cmd.Flags().StringVar(&o.Restart, "restart", o.Restart, "job's restart policy. supported values: OnFailure, Never")
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cmdutil.AddFieldManagerFlagVar(cmd, &o.FieldManager, "kubectl-create")
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return cmd
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}
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// Complete completes all the required options
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func (o *CreateCronJobOptions) Complete(f cmdutil.Factory, 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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o.Name = name
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if len(args) > 1 {
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o.Command = args[1:]
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}
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if len(o.Restart) == 0 {
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o.Restart = "OnFailure"
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}
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clientConfig, err := f.ToRESTConfig()
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if err != nil {
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return err
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}
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// TODO: drop this condition when beta disappears in 1.25
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clientset, err := f.KubernetesClientSet()
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if err != nil {
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return err
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}
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resources, err := clientset.Discovery().ServerResourcesForGroupVersion(batchv1.SchemeGroupVersion.String())
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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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found := false
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for _, serverResource := range resources.APIResources {
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if serverResource.Name == "cronjobs" {
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found = true
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break
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}
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}
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if found {
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o.Client, err = batchv1client.NewForConfig(clientConfig)
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if err != nil {
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return err
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}
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} else {
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o.ClientBeta, err = batchv1beta1client.NewForConfig(clientConfig)
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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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o.Namespace, o.EnforceNamespace, err = f.ToRawKubeConfigLoader().Namespace()
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if err != nil {
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return err
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}
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o.Builder = f.NewBuilder()
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o.CreateAnnotation = cmdutil.GetFlagBool(cmd, cmdutil.ApplyAnnotationsFlag)
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o.DryRunStrategy, err = cmdutil.GetDryRunStrategy(cmd)
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if err != nil {
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return err
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}
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dynamicClient, err := f.DynamicClient()
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if err != nil {
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return err
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}
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o.DryRunVerifier = resource.NewDryRunVerifier(dynamicClient, f.OpenAPIGetter())
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cmdutil.PrintFlagsWithDryRunStrategy(o.PrintFlags, o.DryRunStrategy)
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printer, err := o.PrintFlags.ToPrinter()
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if err != nil {
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return err
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}
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o.PrintObj = func(obj runtime.Object) error {
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return printer.PrintObj(obj, o.Out)
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}
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return nil
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}
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// Run performs the execution of 'create cronjob' sub command
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func (o *CreateCronJobOptions) Run() error {
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if o.Client != nil {
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cronJob := o.createCronJob()
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if err := util.CreateOrUpdateAnnotation(o.CreateAnnotation, cronJob, scheme.DefaultJSONEncoder()); err != nil {
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return err
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}
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if o.DryRunStrategy != cmdutil.DryRunClient {
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createOptions := metav1.CreateOptions{}
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if o.FieldManager != "" {
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createOptions.FieldManager = o.FieldManager
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}
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if o.DryRunStrategy == cmdutil.DryRunServer {
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if err := o.DryRunVerifier.HasSupport(cronJob.GroupVersionKind()); err != nil {
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return err
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}
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createOptions.DryRun = []string{metav1.DryRunAll}
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}
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var err error
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cronJob, err = o.Client.CronJobs(o.Namespace).Create(context.TODO(), cronJob, createOptions)
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if err != nil {
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return fmt.Errorf("failed to create cronjob: %v", err)
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}
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}
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return o.PrintObj(cronJob)
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}
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// TODO: drop this condition when beta disappears in 1.25
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cronJobBeta := o.createCronJobBeta()
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if err := util.CreateOrUpdateAnnotation(o.CreateAnnotation, cronJobBeta, scheme.DefaultJSONEncoder()); err != nil {
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return err
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}
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if o.DryRunStrategy != cmdutil.DryRunClient {
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createOptions := metav1.CreateOptions{}
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if o.FieldManager != "" {
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createOptions.FieldManager = o.FieldManager
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}
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if o.DryRunStrategy == cmdutil.DryRunServer {
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if err := o.DryRunVerifier.HasSupport(cronJobBeta.GroupVersionKind()); err != nil {
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return err
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}
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createOptions.DryRun = []string{metav1.DryRunAll}
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}
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var err error
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cronJobBeta, err = o.ClientBeta.CronJobs(o.Namespace).Create(context.TODO(), cronJobBeta, createOptions)
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if err != nil {
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return fmt.Errorf("failed to create cronjob: %v", err)
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}
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}
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return o.PrintObj(cronJobBeta)
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}
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func (o *CreateCronJobOptions) createCronJobBeta() *batchv1beta1.CronJob {
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cronjob := &batchv1beta1.CronJob{
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TypeMeta: metav1.TypeMeta{APIVersion: batchv1beta1.SchemeGroupVersion.String(), Kind: "CronJob"},
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ObjectMeta: metav1.ObjectMeta{
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Name: o.Name,
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},
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Spec: batchv1beta1.CronJobSpec{
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Schedule: o.Schedule,
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JobTemplate: batchv1beta1.JobTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Name: o.Name,
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},
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Spec: batchv1.JobSpec{
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Template: corev1.PodTemplateSpec{
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Spec: corev1.PodSpec{
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Containers: []corev1.Container{
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{
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Name: o.Name,
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Image: o.Image,
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Command: o.Command,
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},
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},
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RestartPolicy: corev1.RestartPolicy(o.Restart),
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},
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},
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},
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},
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},
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}
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if o.EnforceNamespace {
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cronjob.Namespace = o.Namespace
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}
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return cronjob
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}
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func (o *CreateCronJobOptions) createCronJob() *batchv1.CronJob {
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cronjob := &batchv1.CronJob{
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TypeMeta: metav1.TypeMeta{APIVersion: batchv1.SchemeGroupVersion.String(), Kind: "CronJob"},
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ObjectMeta: metav1.ObjectMeta{
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Name: o.Name,
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},
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Spec: batchv1.CronJobSpec{
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Schedule: o.Schedule,
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JobTemplate: batchv1.JobTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Name: o.Name,
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},
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Spec: batchv1.JobSpec{
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Template: corev1.PodTemplateSpec{
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Spec: corev1.PodSpec{
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Containers: []corev1.Container{
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{
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Name: o.Name,
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Image: o.Image,
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Command: o.Command,
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},
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},
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RestartPolicy: corev1.RestartPolicy(o.Restart),
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},
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},
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},
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},
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},
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}
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if o.EnforceNamespace {
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cronjob.Namespace = o.Namespace
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}
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return cronjob
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}
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