mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-22 13:00:19 +00:00
292 lines
9.9 KiB
Go
292 lines
9.9 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/golang/glog"
|
|
"github.com/spf13/cobra"
|
|
|
|
"k8s.io/apimachinery/pkg/api/meta"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
|
|
batchclient "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/typed/batch/internalversion"
|
|
"k8s.io/kubernetes/pkg/kubectl"
|
|
"k8s.io/kubernetes/pkg/kubectl/cmd/scalejob"
|
|
"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
|
|
cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
|
|
"k8s.io/kubernetes/pkg/kubectl/genericclioptions"
|
|
"k8s.io/kubernetes/pkg/kubectl/genericclioptions/printers"
|
|
"k8s.io/kubernetes/pkg/kubectl/genericclioptions/resource"
|
|
"k8s.io/kubernetes/pkg/kubectl/util/i18n"
|
|
)
|
|
|
|
var (
|
|
scaleLong = templates.LongDesc(i18n.T(`
|
|
Set a new size for a Deployment, ReplicaSet, Replication Controller, or StatefulSet.
|
|
|
|
Scale also allows users to specify one or more preconditions for the scale action.
|
|
|
|
If --current-replicas or --resource-version is specified, it is validated before the
|
|
scale is attempted, and it is guaranteed that the precondition holds true when the
|
|
scale is sent to the server.`))
|
|
|
|
scaleExample = templates.Examples(i18n.T(`
|
|
# Scale a replicaset named 'foo' to 3.
|
|
kubectl scale --replicas=3 rs/foo
|
|
|
|
# Scale a resource identified by type and name specified in "foo.yaml" to 3.
|
|
kubectl scale --replicas=3 -f foo.yaml
|
|
|
|
# If the deployment named mysql's current size is 2, scale mysql to 3.
|
|
kubectl scale --current-replicas=2 --replicas=3 deployment/mysql
|
|
|
|
# Scale multiple replication controllers.
|
|
kubectl scale --replicas=5 rc/foo rc/bar rc/baz
|
|
|
|
# Scale statefulset named 'web' to 3.
|
|
kubectl scale --replicas=3 statefulset/web`))
|
|
)
|
|
|
|
type ScaleOptions struct {
|
|
FilenameOptions resource.FilenameOptions
|
|
RecordFlags *genericclioptions.RecordFlags
|
|
PrintFlags *genericclioptions.PrintFlags
|
|
PrintObj printers.ResourcePrinterFunc
|
|
|
|
Selector string
|
|
All bool
|
|
Replicas int
|
|
ResourceVersion string
|
|
CurrentReplicas int
|
|
Timeout time.Duration
|
|
|
|
Recorder genericclioptions.Recorder
|
|
builder *resource.Builder
|
|
namespace string
|
|
enforceNamespace bool
|
|
args []string
|
|
shortOutput bool
|
|
clientSet internalclientset.Interface
|
|
scaler kubectl.Scaler
|
|
unstructuredClientForMapping func(mapping *meta.RESTMapping) (resource.RESTClient, error)
|
|
parent string
|
|
|
|
genericclioptions.IOStreams
|
|
}
|
|
|
|
func NewScaleOptions(ioStreams genericclioptions.IOStreams) *ScaleOptions {
|
|
return &ScaleOptions{
|
|
PrintFlags: genericclioptions.NewPrintFlags("scaled"),
|
|
RecordFlags: genericclioptions.NewRecordFlags(),
|
|
CurrentReplicas: -1,
|
|
Recorder: genericclioptions.NoopRecorder{},
|
|
IOStreams: ioStreams,
|
|
}
|
|
}
|
|
|
|
// NewCmdScale returns a cobra command with the appropriate configuration and flags to run scale
|
|
func NewCmdScale(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command {
|
|
o := NewScaleOptions(ioStreams)
|
|
|
|
validArgs := []string{"deployment", "replicaset", "replicationcontroller", "statefulset"}
|
|
|
|
cmd := &cobra.Command{
|
|
Use: "scale [--resource-version=version] [--current-replicas=count] --replicas=COUNT (-f FILENAME | TYPE NAME)",
|
|
DisableFlagsInUseLine: true,
|
|
Short: i18n.T("Set a new size for a Deployment, ReplicaSet, Replication Controller, or Job"),
|
|
Long: scaleLong,
|
|
Example: scaleExample,
|
|
Run: func(cmd *cobra.Command, args []string) {
|
|
cmdutil.CheckErr(o.Complete(f, cmd, args))
|
|
cmdutil.CheckErr(o.Validate(cmd))
|
|
cmdutil.CheckErr(o.RunScale())
|
|
},
|
|
ValidArgs: validArgs,
|
|
}
|
|
|
|
o.RecordFlags.AddFlags(cmd)
|
|
o.PrintFlags.AddFlags(cmd)
|
|
|
|
cmd.Flags().StringVarP(&o.Selector, "selector", "l", o.Selector, "Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
|
|
cmd.Flags().BoolVar(&o.All, "all", o.All, "Select all resources in the namespace of the specified resource types")
|
|
cmd.Flags().StringVar(&o.ResourceVersion, "resource-version", o.ResourceVersion, i18n.T("Precondition for resource version. Requires that the current resource version match this value in order to scale."))
|
|
cmd.Flags().IntVar(&o.CurrentReplicas, "current-replicas", o.CurrentReplicas, "Precondition for current size. Requires that the current size of the resource match this value in order to scale.")
|
|
cmd.Flags().IntVar(&o.Replicas, "replicas", o.Replicas, "The new desired number of replicas. Required.")
|
|
cmd.MarkFlagRequired("replicas")
|
|
cmd.Flags().DurationVar(&o.Timeout, "timeout", 0, "The length of time to wait before giving up on a scale operation, zero means don't wait. Any other values should contain a corresponding time unit (e.g. 1s, 2m, 3h).")
|
|
cmdutil.AddFilenameOptionFlags(cmd, &o.FilenameOptions, "identifying the resource to set a new size")
|
|
return cmd
|
|
}
|
|
|
|
func (o *ScaleOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
|
|
var err error
|
|
o.RecordFlags.Complete(cmd)
|
|
o.Recorder, err = o.RecordFlags.ToRecorder()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
printer, err := o.PrintFlags.ToPrinter()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
o.PrintObj = printer.PrintObj
|
|
|
|
o.namespace, o.enforceNamespace, err = f.ToRawKubeConfigLoader().Namespace()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
o.builder = f.NewBuilder()
|
|
o.args = args
|
|
o.shortOutput = cmdutil.GetFlagString(cmd, "output") == "name"
|
|
o.clientSet, err = f.ClientSet()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
o.scaler, err = scaler(f)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
o.unstructuredClientForMapping = f.UnstructuredClientForMapping
|
|
o.parent = cmd.Parent().Name()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (o *ScaleOptions) Validate(cmd *cobra.Command) error {
|
|
if o.Replicas < 0 {
|
|
return fmt.Errorf("The --replicas=COUNT flag is required, and COUNT must be greater than or equal to 0")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// RunScale executes the scaling
|
|
func (o *ScaleOptions) RunScale() error {
|
|
r := o.builder.
|
|
Unstructured().
|
|
ContinueOnError().
|
|
NamespaceParam(o.namespace).DefaultNamespace().
|
|
FilenameParam(o.enforceNamespace, &o.FilenameOptions).
|
|
ResourceTypeOrNameArgs(o.All, o.args...).
|
|
Flatten().
|
|
LabelSelectorParam(o.Selector).
|
|
Do()
|
|
err := r.Err()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
infos := []*resource.Info{}
|
|
err = r.Visit(func(info *resource.Info, err error) error {
|
|
if err == nil {
|
|
infos = append(infos, info)
|
|
}
|
|
return nil
|
|
})
|
|
|
|
if len(o.ResourceVersion) != 0 && len(infos) > 1 {
|
|
return fmt.Errorf("cannot use --resource-version with multiple resources")
|
|
}
|
|
|
|
precondition := &kubectl.ScalePrecondition{Size: o.CurrentReplicas, ResourceVersion: o.ResourceVersion}
|
|
retry := kubectl.NewRetryParams(1*time.Second, 5*time.Minute)
|
|
|
|
var waitForReplicas *kubectl.RetryParams
|
|
if o.Timeout != 0 {
|
|
waitForReplicas = kubectl.NewRetryParams(1*time.Second, timeout)
|
|
}
|
|
|
|
counter := 0
|
|
err = r.Visit(func(info *resource.Info, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
mapping := info.ResourceMapping()
|
|
if mapping.Resource.GroupResource() == (schema.GroupResource{Group: "batch", Resource: "jobs"}) {
|
|
// go down the legacy jobs path. This can be removed in 3.14 For now, contain it.
|
|
fmt.Fprintf(o.ErrOut, "%s scale job is DEPRECATED and will be removed in a future version.\n", o.parent)
|
|
|
|
if err := ScaleJob(info, o.clientSet.Batch(), uint(o.Replicas), precondition, retry, waitForReplicas); err != nil {
|
|
return err
|
|
}
|
|
|
|
} else {
|
|
if err := o.scaler.Scale(info.Namespace, info.Name, uint(o.Replicas), precondition, retry, waitForReplicas, mapping.Resource.GroupResource()); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// if the recorder makes a change, compute and create another patch
|
|
if mergePatch, err := o.Recorder.MakeRecordMergePatch(info.Object); err != nil {
|
|
glog.V(4).Infof("error recording current command: %v", err)
|
|
} else if len(mergePatch) > 0 {
|
|
client, err := o.unstructuredClientForMapping(mapping)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
helper := resource.NewHelper(client, mapping)
|
|
if _, err := helper.Patch(info.Namespace, info.Name, types.MergePatchType, mergePatch); err != nil {
|
|
glog.V(4).Infof("error recording reason: %v", err)
|
|
}
|
|
}
|
|
|
|
counter++
|
|
return o.PrintObj(info.Object, o.Out)
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if counter == 0 {
|
|
return fmt.Errorf("no objects passed to scale")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func ScaleJob(info *resource.Info, jobsClient batchclient.JobsGetter, count uint, preconditions *kubectl.ScalePrecondition, retry, waitForReplicas *kubectl.RetryParams) error {
|
|
scaler := scalejob.JobPsuedoScaler{
|
|
JobsClient: jobsClient,
|
|
}
|
|
var jobPreconditions *scalejob.ScalePrecondition
|
|
if preconditions != nil {
|
|
jobPreconditions = &scalejob.ScalePrecondition{Size: preconditions.Size, ResourceVersion: preconditions.ResourceVersion}
|
|
}
|
|
var jobRetry *scalejob.RetryParams
|
|
if retry != nil {
|
|
jobRetry = &scalejob.RetryParams{Interval: retry.Interval, Timeout: retry.Timeout}
|
|
}
|
|
var jobWaitForReplicas *scalejob.RetryParams
|
|
if waitForReplicas != nil {
|
|
jobWaitForReplicas = &scalejob.RetryParams{Interval: waitForReplicas.Interval, Timeout: waitForReplicas.Timeout}
|
|
}
|
|
|
|
return scaler.Scale(info.Namespace, info.Name, count, jobPreconditions, jobRetry, jobWaitForReplicas)
|
|
}
|
|
|
|
func scaler(f cmdutil.Factory) (kubectl.Scaler, error) {
|
|
scalesGetter, err := cmdutil.ScaleClientFn(f)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return kubectl.NewScaler(scalesGetter), nil
|
|
}
|