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rollout_resume.go
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rollout_resume.go
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package rollout
import (
"fmt"
internalclient "github.com/hantmac/kubectl-kruise/pkg/client"
internalpolymorphichelpers "github.com/hantmac/kubectl-kruise/pkg/internal/polymorphichelpers"
"github.com/spf13/cobra"
"k8s.io/apimachinery/pkg/types"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/cli-runtime/pkg/printers"
"k8s.io/cli-runtime/pkg/resource"
"k8s.io/kubectl/pkg/cmd/set"
cmdutil "k8s.io/kubectl/pkg/cmd/util"
"k8s.io/kubectl/pkg/scheme"
"k8s.io/kubectl/pkg/util/i18n"
"k8s.io/kubectl/pkg/util/templates"
)
// ResumeOptions is the start of the data required to perform the operation. As new fields are added, add them here instead of
// referencing the cmd.Flags()
type ResumeOptions struct {
PrintFlags *genericclioptions.PrintFlags
ToPrinter func(string) (printers.ResourcePrinter, error)
Resources []string
Builder func() *resource.Builder
Resumer internalpolymorphichelpers.ObjectResumerFunc
Namespace string
EnforceNamespace bool
resource.FilenameOptions
genericclioptions.IOStreams
}
var (
resumeLong = templates.LongDesc(`
Resume a paused resource
Paused resources will not be reconciled by a controller. By resuming a
resource, we allow it to be reconciled again.
Currently deployments, cloneset, advancedstatefulset support being resumed.`)
resumeExample = templates.Examples(`
# Resume an already paused deployment
kubectl-kruise rollout resume cloneset/nginx
kubectl-kruise rollout resume deployment/nginx`)
)
// NewRolloutResumeOptions returns an initialized ResumeOptions instance
func NewRolloutResumeOptions(streams genericclioptions.IOStreams) *ResumeOptions {
return &ResumeOptions{
PrintFlags: genericclioptions.NewPrintFlags("resumed").WithTypeSetter(internalclient.Scheme),
IOStreams: streams,
}
}
// NewCmdRolloutResume returns a Command instance for 'rollout resume' sub command
func NewCmdRolloutResume(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
o := NewRolloutResumeOptions(streams)
validArgs := []string{"deployment", "cloneset"}
cmd := &cobra.Command{
Use: "resume RESOURCE",
DisableFlagsInUseLine: true,
Short: i18n.T("Resume a paused resource"),
Long: resumeLong,
Example: resumeExample,
Run: func(cmd *cobra.Command, args []string) {
cmdutil.CheckErr(o.Complete(f, cmd, args))
cmdutil.CheckErr(o.Validate())
cmdutil.CheckErr(o.RunResume())
},
ValidArgs: validArgs,
}
usage := "identifying the resource to get from a server."
cmdutil.AddFilenameOptionFlags(cmd, &o.FilenameOptions, usage)
o.PrintFlags.AddFlags(cmd)
return cmd
}
// Complete completes all the required options
func (o *ResumeOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
o.Resources = args
o.Resumer = internalpolymorphichelpers.ObjectResumerFn
var err error
o.Namespace, o.EnforceNamespace, err = f.ToRawKubeConfigLoader().Namespace()
if err != nil {
return err
}
o.ToPrinter = func(operation string) (printers.ResourcePrinter, error) {
o.PrintFlags.NamePrintFlags.Operation = operation
return o.PrintFlags.ToPrinter()
}
o.Builder = f.NewBuilder
return nil
}
func (o *ResumeOptions) Validate() error {
if len(o.Resources) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames, o.Kustomize) {
return fmt.Errorf("required resource not specified")
}
return nil
}
// RunResume performs the execution of 'rollout resume' sub command
func (o ResumeOptions) RunResume() error {
r := o.Builder().
WithScheme(internalclient.Scheme, scheme.Scheme.PrioritizedVersionsAllGroups()...).
NamespaceParam(o.Namespace).DefaultNamespace().
FilenameParam(o.EnforceNamespace, &o.FilenameOptions).
ResourceTypeOrNameArgs(true, o.Resources...).
ContinueOnError().
Latest().
Flatten().
Do()
if err := r.Err(); err != nil {
return err
}
allErrs := []error{}
infos, err := r.Infos()
if err != nil {
// restore previous command behavior where
// an error caused by retrieving infos due to
// at least a single broken object did not result
// in an immediate return, but rather an overall
// aggregation of errors.
allErrs = append(allErrs, err)
}
for _, patch := range set.CalculatePatches(infos, scheme.DefaultJSONEncoder(), set.PatchFn(o.Resumer)) {
info := patch.Info
if patch.Err != nil {
resourceString := info.Mapping.Resource.Resource
if len(info.Mapping.Resource.Group) > 0 {
resourceString = resourceString + "." + info.Mapping.Resource.Group
}
allErrs = append(allErrs, fmt.Errorf("error: %s %q %v", resourceString, info.Name, patch.Err))
continue
}
if string(patch.Patch) == "{}" || len(patch.Patch) == 0 {
printer, err := o.ToPrinter("already resumed")
if err != nil {
allErrs = append(allErrs, err)
continue
}
if err = printer.PrintObj(info.Object, o.Out); err != nil {
allErrs = append(allErrs, err)
}
continue
}
obj, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, types.MergePatchType, patch.Patch, nil)
if err != nil {
allErrs = append(allErrs, fmt.Errorf("failed to patch: %v", err))
continue
}
info.Refresh(obj, true)
printer, err := o.ToPrinter("resumed")
if err != nil {
allErrs = append(allErrs, err)
continue
}
if err = printer.PrintObj(info.Object, o.Out); err != nil {
allErrs = append(allErrs, err)
}
}
return utilerrors.NewAggregate(allErrs)
}