mirror of https://github.com/k3s-io/k3s
470 lines
14 KiB
Go
470 lines
14 KiB
Go
/*
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Copyright 2014 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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"io"
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"net/url"
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"runtime"
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"strings"
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"github.com/spf13/cobra"
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"k8s.io/klog"
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"k8s.io/apimachinery/pkg/api/meta"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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kruntime "k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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"k8s.io/cli-runtime/pkg/printers"
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"k8s.io/cli-runtime/pkg/resource"
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"k8s.io/client-go/dynamic"
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cmdutil "k8s.io/kubectl/pkg/cmd/util"
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"k8s.io/kubectl/pkg/cmd/util/editor"
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"k8s.io/kubectl/pkg/generate"
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"k8s.io/kubectl/pkg/rawhttp"
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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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// CreateOptions is the commandline options for 'create' sub command
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type CreateOptions struct {
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PrintFlags *genericclioptions.PrintFlags
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RecordFlags *genericclioptions.RecordFlags
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DryRunStrategy cmdutil.DryRunStrategy
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DryRunVerifier *resource.DryRunVerifier
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FilenameOptions resource.FilenameOptions
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Selector string
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EditBeforeCreate bool
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Raw string
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Recorder genericclioptions.Recorder
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PrintObj func(obj kruntime.Object) error
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genericclioptions.IOStreams
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}
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var (
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createLong = templates.LongDesc(i18n.T(`
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Create a resource from a file or from stdin.
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JSON and YAML formats are accepted.`))
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createExample = templates.Examples(i18n.T(`
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# Create a pod using the data in pod.json.
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kubectl create -f ./pod.json
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# Create a pod based on the JSON passed into stdin.
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cat pod.json | kubectl create -f -
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# Edit the data in docker-registry.yaml in JSON then create the resource using the edited data.
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kubectl create -f docker-registry.yaml --edit -o json`))
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)
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// NewCreateOptions returns an initialized CreateOptions instance
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func NewCreateOptions(ioStreams genericclioptions.IOStreams) *CreateOptions {
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return &CreateOptions{
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PrintFlags: genericclioptions.NewPrintFlags("created").WithTypeSetter(scheme.Scheme),
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RecordFlags: genericclioptions.NewRecordFlags(),
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Recorder: genericclioptions.NoopRecorder{},
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IOStreams: ioStreams,
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}
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}
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// NewCmdCreate returns new initialized instance of create sub command
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func NewCmdCreate(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command {
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o := NewCreateOptions(ioStreams)
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cmd := &cobra.Command{
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Use: "create -f FILENAME",
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DisableFlagsInUseLine: true,
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Short: i18n.T("Create a resource from a file or from stdin."),
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Long: createLong,
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Example: createExample,
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Run: func(cmd *cobra.Command, args []string) {
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if cmdutil.IsFilenameSliceEmpty(o.FilenameOptions.Filenames, o.FilenameOptions.Kustomize) {
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ioStreams.ErrOut.Write([]byte("Error: must specify one of -f and -k\n\n"))
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defaultRunFunc := cmdutil.DefaultSubCommandRun(ioStreams.ErrOut)
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defaultRunFunc(cmd, args)
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return
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}
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cmdutil.CheckErr(o.Complete(f, cmd))
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cmdutil.CheckErr(o.ValidateArgs(cmd, args))
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cmdutil.CheckErr(o.RunCreate(f, cmd))
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},
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}
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// bind flag structs
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o.RecordFlags.AddFlags(cmd)
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usage := "to use to create the resource"
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cmdutil.AddFilenameOptionFlags(cmd, &o.FilenameOptions, usage)
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cmdutil.AddValidateFlags(cmd)
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cmd.Flags().BoolVar(&o.EditBeforeCreate, "edit", o.EditBeforeCreate, "Edit the API resource before creating")
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cmd.Flags().Bool("windows-line-endings", runtime.GOOS == "windows",
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"Only relevant if --edit=true. Defaults to the line ending native to your platform.")
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cmdutil.AddApplyAnnotationFlags(cmd)
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cmdutil.AddDryRunFlag(cmd)
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cmd.Flags().StringVarP(&o.Selector, "selector", "l", o.Selector, "Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
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cmd.Flags().StringVar(&o.Raw, "raw", o.Raw, "Raw URI to POST to the server. Uses the transport specified by the kubeconfig file.")
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o.PrintFlags.AddFlags(cmd)
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// create subcommands
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cmd.AddCommand(NewCmdCreateNamespace(f, ioStreams))
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cmd.AddCommand(NewCmdCreateQuota(f, ioStreams))
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cmd.AddCommand(NewCmdCreateSecret(f, ioStreams))
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cmd.AddCommand(NewCmdCreateConfigMap(f, ioStreams))
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cmd.AddCommand(NewCmdCreateServiceAccount(f, ioStreams))
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cmd.AddCommand(NewCmdCreateService(f, ioStreams))
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cmd.AddCommand(NewCmdCreateDeployment(f, ioStreams))
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cmd.AddCommand(NewCmdCreateClusterRole(f, ioStreams))
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cmd.AddCommand(NewCmdCreateClusterRoleBinding(f, ioStreams))
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cmd.AddCommand(NewCmdCreateRole(f, ioStreams))
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cmd.AddCommand(NewCmdCreateRoleBinding(f, ioStreams))
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cmd.AddCommand(NewCmdCreatePodDisruptionBudget(f, ioStreams))
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cmd.AddCommand(NewCmdCreatePriorityClass(f, ioStreams))
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cmd.AddCommand(NewCmdCreateJob(f, ioStreams))
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cmd.AddCommand(NewCmdCreateCronJob(f, ioStreams))
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return cmd
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}
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// ValidateArgs makes sure there is no discrepency in command options
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func (o *CreateOptions) ValidateArgs(cmd *cobra.Command, args []string) error {
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if len(args) != 0 {
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return cmdutil.UsageErrorf(cmd, "Unexpected args: %v", args)
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}
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if len(o.Raw) > 0 {
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if o.EditBeforeCreate {
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return cmdutil.UsageErrorf(cmd, "--raw and --edit are mutually exclusive")
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}
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if len(o.FilenameOptions.Filenames) != 1 {
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return cmdutil.UsageErrorf(cmd, "--raw can only use a single local file or stdin")
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}
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if strings.Index(o.FilenameOptions.Filenames[0], "http://") == 0 || strings.Index(o.FilenameOptions.Filenames[0], "https://") == 0 {
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return cmdutil.UsageErrorf(cmd, "--raw cannot read from a url")
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}
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if o.FilenameOptions.Recursive {
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return cmdutil.UsageErrorf(cmd, "--raw and --recursive are mutually exclusive")
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}
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if len(o.Selector) > 0 {
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return cmdutil.UsageErrorf(cmd, "--raw and --selector (-l) are mutually exclusive")
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}
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if len(cmdutil.GetFlagString(cmd, "output")) > 0 {
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return cmdutil.UsageErrorf(cmd, "--raw and --output are mutually exclusive")
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}
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if _, err := url.ParseRequestURI(o.Raw); err != nil {
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return cmdutil.UsageErrorf(cmd, "--raw must be a valid URL path: %v", err)
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}
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}
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return nil
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}
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// Complete completes all the required options
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func (o *CreateOptions) Complete(f cmdutil.Factory, cmd *cobra.Command) error {
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var err error
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o.RecordFlags.Complete(cmd)
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o.Recorder, err = o.RecordFlags.ToRecorder()
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if err != nil {
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return err
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}
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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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cmdutil.PrintFlagsWithDryRunStrategy(o.PrintFlags, o.DryRunStrategy)
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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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discoveryClient, err := f.ToDiscoveryClient()
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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, discoveryClient)
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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 kruntime.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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// RunCreate performs the creation
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func (o *CreateOptions) RunCreate(f cmdutil.Factory, cmd *cobra.Command) error {
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// raw only makes sense for a single file resource multiple objects aren't likely to do what you want.
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// the validator enforces this, so
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if len(o.Raw) > 0 {
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restClient, err := f.RESTClient()
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if err != nil {
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return err
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}
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return rawhttp.RawPost(restClient, o.IOStreams, o.Raw, o.FilenameOptions.Filenames[0])
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}
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if o.EditBeforeCreate {
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return RunEditOnCreate(f, o.PrintFlags, o.RecordFlags, o.IOStreams, cmd, &o.FilenameOptions)
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}
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schema, err := f.Validator(cmdutil.GetFlagBool(cmd, "validate"))
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if err != nil {
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return err
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}
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cmdNamespace, 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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r := f.NewBuilder().
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Unstructured().
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Schema(schema).
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ContinueOnError().
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NamespaceParam(cmdNamespace).DefaultNamespace().
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FilenameParam(enforceNamespace, &o.FilenameOptions).
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LabelSelectorParam(o.Selector).
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Flatten().
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Do()
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err = r.Err()
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if err != nil {
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return err
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}
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count := 0
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err = r.Visit(func(info *resource.Info, err error) error {
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if err != nil {
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return err
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}
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if err := util.CreateOrUpdateAnnotation(cmdutil.GetFlagBool(cmd, cmdutil.ApplyAnnotationsFlag), info.Object, scheme.DefaultJSONEncoder()); err != nil {
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return cmdutil.AddSourceToErr("creating", info.Source, err)
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}
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if err := o.Recorder.Record(info.Object); err != nil {
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klog.V(4).Infof("error recording current command: %v", err)
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}
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if o.DryRunStrategy != cmdutil.DryRunClient {
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if o.DryRunStrategy == cmdutil.DryRunServer {
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if err := o.DryRunVerifier.HasSupport(info.Mapping.GroupVersionKind); err != nil {
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return cmdutil.AddSourceToErr("creating", info.Source, err)
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}
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}
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obj, err := resource.
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NewHelper(info.Client, info.Mapping).
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DryRun(o.DryRunStrategy == cmdutil.DryRunServer).
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Create(info.Namespace, true, info.Object)
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if err != nil {
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return cmdutil.AddSourceToErr("creating", info.Source, err)
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}
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info.Refresh(obj, true)
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}
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count++
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return o.PrintObj(info.Object)
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})
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if err != nil {
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return err
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}
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if count == 0 {
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return fmt.Errorf("no objects passed to create")
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}
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return nil
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}
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// RunEditOnCreate performs edit on creation
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func RunEditOnCreate(f cmdutil.Factory, printFlags *genericclioptions.PrintFlags, recordFlags *genericclioptions.RecordFlags, ioStreams genericclioptions.IOStreams, cmd *cobra.Command, options *resource.FilenameOptions) error {
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editOptions := editor.NewEditOptions(editor.EditBeforeCreateMode, ioStreams)
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editOptions.FilenameOptions = *options
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editOptions.ValidateOptions = cmdutil.ValidateOptions{
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EnableValidation: cmdutil.GetFlagBool(cmd, "validate"),
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}
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editOptions.PrintFlags = printFlags
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editOptions.ApplyAnnotation = cmdutil.GetFlagBool(cmd, cmdutil.ApplyAnnotationsFlag)
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editOptions.RecordFlags = recordFlags
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err := editOptions.Complete(f, []string{}, cmd)
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if err != nil {
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return err
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}
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return editOptions.Run()
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}
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// NameFromCommandArgs is a utility function for commands that assume the first argument is a resource name
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func NameFromCommandArgs(cmd *cobra.Command, args []string) (string, error) {
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argsLen := cmd.ArgsLenAtDash()
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// ArgsLenAtDash returns -1 when -- was not specified
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if argsLen == -1 {
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argsLen = len(args)
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}
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if argsLen != 1 {
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return "", cmdutil.UsageErrorf(cmd, "exactly one NAME is required, got %d", argsLen)
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}
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return args[0], nil
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}
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// CreateSubcommandOptions is an options struct to support create subcommands
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type CreateSubcommandOptions struct {
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// PrintFlags holds options necessary for obtaining a printer
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PrintFlags *genericclioptions.PrintFlags
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// Name of resource being created
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Name string
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// StructuredGenerator is the resource generator for the object being created
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StructuredGenerator generate.StructuredGenerator
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DryRunStrategy cmdutil.DryRunStrategy
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DryRunVerifier *resource.DryRunVerifier
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CreateAnnotation bool
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Namespace string
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EnforceNamespace bool
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Mapper meta.RESTMapper
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DynamicClient dynamic.Interface
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PrintObj printers.ResourcePrinterFunc
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genericclioptions.IOStreams
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}
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// NewCreateSubcommandOptions returns initialized CreateSubcommandOptions
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func NewCreateSubcommandOptions(ioStreams genericclioptions.IOStreams) *CreateSubcommandOptions {
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return &CreateSubcommandOptions{
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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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// Complete completes all the required options
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func (o *CreateSubcommandOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string, generator generate.StructuredGenerator) 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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o.StructuredGenerator = generator
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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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discoveryClient, err := f.ToDiscoveryClient()
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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, discoveryClient)
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o.CreateAnnotation = cmdutil.GetFlagBool(cmd, cmdutil.ApplyAnnotationsFlag)
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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 kruntime.Object, out io.Writer) error {
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return printer.PrintObj(obj, out)
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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.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.Mapper, err = f.ToRESTMapper()
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if err != nil {
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return err
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}
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return nil
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}
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// Run executes a create subcommand using the specified options
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func (o *CreateSubcommandOptions) Run() error {
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obj, err := o.StructuredGenerator.StructuredGenerate()
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if 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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// create subcommands have compiled knowledge of things they create, so type them directly
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gvks, _, err := scheme.Scheme.ObjectKinds(obj)
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if err != nil {
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return err
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}
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gvk := gvks[0]
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mapping, err := o.Mapper.RESTMapping(schema.GroupKind{Group: gvk.Group, Kind: gvk.Kind}, gvk.Version)
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if err != nil {
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return err
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}
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if err := util.CreateOrUpdateAnnotation(o.CreateAnnotation, obj, scheme.DefaultJSONEncoder()); err != nil {
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return err
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}
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asUnstructured := &unstructured.Unstructured{}
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if err := scheme.Scheme.Convert(obj, asUnstructured, nil); err != nil {
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return err
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}
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if mapping.Scope.Name() == meta.RESTScopeNameRoot {
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o.Namespace = ""
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}
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createOptions := metav1.CreateOptions{}
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if o.DryRunStrategy == cmdutil.DryRunServer {
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if err := o.DryRunVerifier.HasSupport(mapping.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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actualObject, err := o.DynamicClient.Resource(mapping.Resource).Namespace(o.Namespace).Create(context.TODO(), asUnstructured, createOptions)
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if err != nil {
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return err
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}
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// ensure we pass a versioned object to the printer
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obj = actualObject
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} else {
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if meta, err := meta.Accessor(obj); err == nil && o.EnforceNamespace {
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meta.SetNamespace(o.Namespace)
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}
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}
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return o.PrintObj(obj, o.Out)
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}
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