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kubectl debug: Introduce customizable AttachFunc instead static one

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Currently, kubectl debug statically relies on handleAttachPod function
in order to attach to the pod.
However, external tools would want to set their own customized attach
function and this commit introduces generic `AttachFunc` function interface
which can also override by external tools.
From the point of kubectl debug, there is no functionality change.
This commit is contained in:
Arda Güçlü 2023-07-24 15:28:21 +03:00
parent d25c0a1bdb
commit baed624046
2 changed files with 26 additions and 22 deletions
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46
staging/src/k8s.io/kubectl/pkg/cmd/debug/debug.go
View File

@ -111,6 +111,7 @@ type DebugOptions struct {
Args []string
ArgsOnly bool
Attach bool
AttachFunc func(ctx context.Context, restClientGetter genericclioptions.RESTClientGetter, cmdPath string, ns, podName, containerName string) error
Container string
CopyTo string
Replace bool
@ -212,6 +213,9 @@ func (o *DebugOptions) Complete(restClientGetter genericclioptions.RESTClientGet
attachFlag := cmd.Flags().Lookup("attach")
if !attachFlag.Changed && o.Interactive {
o.Attach = true
if o.AttachFunc == nil {
o.AttachFunc = o.handleAttachPod
}
}
// Environment
@ -377,26 +381,8 @@ func (o *DebugOptions) Run(restClientGetter genericclioptions.RESTClientGetter,
return visitErr
}
if o.Attach && len(containerName) > 0 {
opts := &attach.AttachOptions{
StreamOptions: exec.StreamOptions{
IOStreams: o.IOStreams,
Stdin: o.Interactive,
TTY: o.TTY,
Quiet: o.Quiet,
},
CommandName: cmd.Parent().CommandPath() + " attach",
Attach: &attach.DefaultRemoteAttach{},
}
config, err := restClientGetter.ToRESTConfig()
if err != nil {
return err
}
opts.Config = config
opts.AttachFunc = attach.DefaultAttachFunc
if err := o.handleAttachPod(ctx, restClientGetter, debugPod.Namespace, debugPod.Name, containerName, opts); err != nil {
if o.Attach && len(containerName) > 0 && o.AttachFunc != nil {
if err := o.AttachFunc(ctx, restClientGetter, cmd.Parent().CommandPath(), debugPod.Namespace, debugPod.Name, containerName); err != nil {
return err
}
}
@ -795,7 +781,25 @@ func (o *DebugOptions) waitForContainer(ctx context.Context, ns, podName, contai
return result, err
}
func (o *DebugOptions) handleAttachPod(ctx context.Context, restClientGetter genericclioptions.RESTClientGetter, ns, podName, containerName string, opts *attach.AttachOptions) error {
func (o *DebugOptions) handleAttachPod(ctx context.Context, restClientGetter genericclioptions.RESTClientGetter, cmdPath string, ns, podName, containerName string) error {
opts := &attach.AttachOptions{
StreamOptions: exec.StreamOptions{
IOStreams: o.IOStreams,
Stdin: o.Interactive,
TTY: o.TTY,
Quiet: o.Quiet,
},
CommandName: cmdPath + " attach",
Attach: &attach.DefaultRemoteAttach{},
}
config, err := restClientGetter.ToRESTConfig()
if err != nil {
return err
}
opts.Config = config
opts.AttachFunc = attach.DefaultAttachFunc
pod, err := o.waitForContainer(ctx, ns, podName, containerName)
if err != nil {
return err

2
staging/src/k8s.io/kubectl/pkg/cmd/debug/debug_test.go
View File

@ -2104,7 +2104,7 @@ func TestCompleteAndValidate(t *testing.T) {
}
if diff := cmp.Diff(tc.wantOpts, opts, cmpFilter, cmpopts.IgnoreFields(DebugOptions{},
"attachChanged", "shareProcessedChanged", "podClient", "WarningPrinter", "Applier", "explicitNamespace", "Builder")); diff != "" {
"attachChanged", "shareProcessedChanged", "podClient", "WarningPrinter", "Applier", "explicitNamespace", "Builder", "AttachFunc")); diff != "" {
t.Error("CompleteAndValidate unexpected diff in generated object: (-want +got):\n", diff)
}
})