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set_serviceaccount.go
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/
set_serviceaccount.go
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/*
Copyright 2017 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 set
import (
"errors"
"fmt"
"github.com/golang/glog"
"github.com/spf13/cobra"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/cli-runtime/pkg/genericclioptions/printers"
"k8s.io/cli-runtime/pkg/genericclioptions/resource"
cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
"k8s.io/kubernetes/pkg/kubectl/polymorphichelpers"
"k8s.io/kubernetes/pkg/kubectl/scheme"
"k8s.io/kubernetes/pkg/kubectl/util/i18n"
"k8s.io/kubernetes/pkg/kubectl/util/templates"
)
var (
serviceaccountResources = `
replicationcontroller (rc), deployment (deploy), daemonset (ds), job, replicaset (rs), statefulset`
serviceaccountLong = templates.LongDesc(i18n.T(`
Update ServiceAccount of pod template resources.
Possible resources (case insensitive) can be:
` + serviceaccountResources))
serviceaccountExample = templates.Examples(i18n.T(`
# Set Deployment nginx-deployment's ServiceAccount to serviceaccount1
kubectl set serviceaccount deployment nginx-deployment serviceaccount1
# Print the result (in yaml format) of updated nginx deployment with serviceaccount from local file, without hitting apiserver
kubectl set sa -f nginx-deployment.yaml serviceaccount1 --local --dry-run -o yaml
`))
)
// serviceAccountConfig encapsulates the data required to perform the operation.
type SetServiceAccountOptions struct {
PrintFlags *genericclioptions.PrintFlags
RecordFlags *genericclioptions.RecordFlags
fileNameOptions resource.FilenameOptions
dryRun bool
shortOutput bool
all bool
output string
local bool
updatePodSpecForObject polymorphichelpers.UpdatePodSpecForObjectFunc
infos []*resource.Info
serviceAccountName string
PrintObj printers.ResourcePrinterFunc
Recorder genericclioptions.Recorder
genericclioptions.IOStreams
}
func NewSetServiceAccountOptions(streams genericclioptions.IOStreams) *SetServiceAccountOptions {
return &SetServiceAccountOptions{
PrintFlags: genericclioptions.NewPrintFlags("serviceaccount updated").WithTypeSetter(scheme.Scheme),
RecordFlags: genericclioptions.NewRecordFlags(),
Recorder: genericclioptions.NoopRecorder{},
IOStreams: streams,
}
}
// NewCmdServiceAccount returns the "set serviceaccount" command.
func NewCmdServiceAccount(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
o := NewSetServiceAccountOptions(streams)
cmd := &cobra.Command{
Use: "serviceaccount (-f FILENAME | TYPE NAME) SERVICE_ACCOUNT",
DisableFlagsInUseLine: true,
Aliases: []string{"sa"},
Short: i18n.T("Update ServiceAccount of a resource"),
Long: serviceaccountLong,
Example: serviceaccountExample,
Run: func(cmd *cobra.Command, args []string) {
cmdutil.CheckErr(o.Complete(f, cmd, args))
cmdutil.CheckErr(o.Run())
},
}
o.PrintFlags.AddFlags(cmd)
o.RecordFlags.AddFlags(cmd)
usage := "identifying the resource to get from a server."
cmdutil.AddFilenameOptionFlags(cmd, &o.fileNameOptions, usage)
cmd.Flags().BoolVar(&o.all, "all", o.all, "Select all resources, including uninitialized ones, in the namespace of the specified resource types")
cmd.Flags().BoolVar(&o.local, "local", o.local, "If true, set serviceaccount will NOT contact api-server but run locally.")
cmdutil.AddDryRunFlag(cmd)
cmdutil.AddIncludeUninitializedFlag(cmd)
return cmd
}
// Complete configures serviceAccountConfig from command line args.
func (o *SetServiceAccountOptions) 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
}
o.shortOutput = cmdutil.GetFlagString(cmd, "output") == "name"
o.dryRun = cmdutil.GetDryRunFlag(cmd)
o.output = cmdutil.GetFlagString(cmd, "output")
o.updatePodSpecForObject = polymorphichelpers.UpdatePodSpecForObjectFn
if o.dryRun {
o.PrintFlags.Complete("%s (dry run)")
}
printer, err := o.PrintFlags.ToPrinter()
if err != nil {
return err
}
o.PrintObj = printer.PrintObj
cmdNamespace, enforceNamespace, err := f.ToRawKubeConfigLoader().Namespace()
if err != nil {
return err
}
if len(args) == 0 {
return errors.New("serviceaccount is required")
}
o.serviceAccountName = args[len(args)-1]
resources := args[:len(args)-1]
includeUninitialized := cmdutil.ShouldIncludeUninitialized(cmd, false)
builder := f.NewBuilder().
WithScheme(scheme.Scheme, scheme.Scheme.PrioritizedVersionsAllGroups()...).
LocalParam(o.local).
ContinueOnError().
NamespaceParam(cmdNamespace).DefaultNamespace().
FilenameParam(enforceNamespace, &o.fileNameOptions).
IncludeUninitialized(includeUninitialized).
Flatten()
if !o.local {
builder.ResourceTypeOrNameArgs(o.all, resources...).
Latest()
}
o.infos, err = builder.Do().Infos()
if err != nil {
return err
}
return nil
}
// Run creates and applies the patch either locally or calling apiserver.
func (o *SetServiceAccountOptions) Run() error {
patchErrs := []error{}
patchFn := func(obj runtime.Object) ([]byte, error) {
_, err := o.updatePodSpecForObject(obj, func(podSpec *v1.PodSpec) error {
podSpec.ServiceAccountName = o.serviceAccountName
return nil
})
if err != nil {
return nil, err
}
// record this change (for rollout history)
if err := o.Recorder.Record(obj); err != nil {
glog.V(4).Infof("error recording current command: %v", err)
}
return runtime.Encode(scheme.DefaultJSONEncoder(), obj)
}
patches := CalculatePatches(o.infos, scheme.DefaultJSONEncoder(), patchFn)
for _, patch := range patches {
info := patch.Info
if patch.Err != nil {
patchErrs = append(patchErrs, fmt.Errorf("error: %s/%s %v\n", info.Mapping.Resource, info.Name, patch.Err))
continue
}
if o.local || o.dryRun {
if err := o.PrintObj(info.Object, o.Out); err != nil {
patchErrs = append(patchErrs, err)
}
continue
}
actual, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, types.StrategicMergePatchType, patch.Patch, nil)
if err != nil {
patchErrs = append(patchErrs, fmt.Errorf("failed to patch ServiceAccountName %v", err))
continue
}
if err := o.PrintObj(actual, o.Out); err != nil {
patchErrs = append(patchErrs, err)
}
}
return utilerrors.NewAggregate(patchErrs)
}