Version: v0.2.0 Latest Latest

This package is not in the latest version of its module.

Go to latest
Published: Aug 22, 2019 License: Apache-2.0 Imports: 18 Imported by: 877



Package admission provides implementation for admission webhook and methods to implement admission webhook handlers.

See examples/mutatingwebhook.go and examples/validatingwebhook.go for examples of admission webhooks.



This section is empty.


This section is empty.


func InjectDecoderInto added in v0.2.0

func InjectDecoderInto(decoder *Decoder, i interface{}) (bool, error)

InjectDecoderInto will set decoder on i and return the result if it implements Decoder. Returns false if i does not implement Decoder.


type Decoder added in v0.2.0

type Decoder struct {
	// contains filtered or unexported fields

Decoder knows how to decode the contents of an admission request into a concrete object.

func NewDecoder

func NewDecoder(scheme *runtime.Scheme) (*Decoder, error)

NewDecoder creates a Decoder given the runtime.Scheme

func (*Decoder) Decode added in v0.2.0

func (d *Decoder) Decode(req Request, into runtime.Object) error

Decode decodes the inlined object in the AdmissionRequest into the passed-in runtime.Object. If you want decode the OldObject in the AdmissionRequest, use DecodeRaw. It errors out if req.Object.Raw is empty i.e. containing 0 raw bytes.

func (*Decoder) DecodeRaw added in v0.2.0

func (d *Decoder) DecodeRaw(rawObj runtime.RawExtension, into runtime.Object) error

DecodeRaw decodes a RawExtension object into the passed-in runtime.Object. It errors out if rawObj is empty i.e. containing 0 raw bytes.

type DecoderInjector added in v0.2.0

type DecoderInjector interface {
	InjectDecoder(*Decoder) error

DecoderInjector is used by the ControllerManager to inject decoder into webhook handlers.

type Defaulter added in v0.2.0

type Defaulter interface {

Defaulter defines functions for setting defaults on resources

type Handler

type Handler interface {
	// Handle yields a response to an AdmissionRequest.
	// The supplied context is extracted from the received http.Request, allowing wrapping
	// http.Handlers to inject values into and control cancelation of downstream request processing.
	Handle(context.Context, Request) Response

Handler can handle an AdmissionRequest.

func MultiMutatingHandler added in v0.2.0

func MultiMutatingHandler(handlers ...Handler) Handler

MultiMutatingHandler combines multiple mutating webhook handlers into a single mutating webhook handler. Handlers are called in sequential order, and the first `allowed: false` response may short-circuit the rest. Users must take care to ensure patches are disjoint.

func MultiValidatingHandler added in v0.2.0

func MultiValidatingHandler(handlers ...Handler) Handler

MultiValidatingHandler combines multiple validating webhook handlers into a single validating webhook handler. Handlers are called in sequential order, and the first `allowed: false` response may short-circuit the rest.

type HandlerFunc

type HandlerFunc func(context.Context, Request) Response

HandlerFunc implements Handler interface using a single function.

func (HandlerFunc) Handle

func (f HandlerFunc) Handle(ctx context.Context, req Request) Response

Handle process the AdmissionRequest by invoking the underlying function.

type Request added in v0.2.0

type Request struct {

Request defines the input for an admission handler. It contains information to identify the object in question (group, version, kind, resource, subresource, name, namespace), as well as the operation in question (e.g. Get, Create, etc), and the object itself.

type Response added in v0.2.0

type Response struct {
	// Patches are the JSON patches for mutating webhooks.
	// Using this instead of setting Response.Patch to minimize
	// overhead of serialization and deserialization.
	// Patches set here will override any patches in the response,
	// so leave this empty if you want to set the patch response directly.
	Patches []jsonpatch.JsonPatchOperation
	// AdmissionResponse is the raw admission response.
	// The Patch field in it will be overwritten by the listed patches.

Response is the output of an admission handler. It contains a response indicating if a given operation is allowed, as well as a set of patches to mutate the object in the case of a mutating admission handler.

func Allowed added in v0.2.0

func Allowed(reason string) Response

Allowed constructs a response indicating that the given operation is allowed (without any patches).

func Denied added in v0.2.0

func Denied(reason string) Response

Denied constructs a response indicating that the given operation is not allowed.

func Errored added in v0.2.0

func Errored(code int32, err error) Response

Errored creates a new Response for error-handling a request.

func PatchResponseFromRaw added in v0.2.0

func PatchResponseFromRaw(original, current []byte) Response

PatchResponseFromRaw takes 2 byte arrays and returns a new response with json patch. The original object should be passed in as raw bytes to avoid the roundtripping problem described in

func Patched added in v0.2.0

func Patched(reason string, patches ...jsonpatch.JsonPatchOperation) Response

Patched constructs a response indicating that the given operation is allowed, and that the target object should be modified by the given JSONPatch operations.

func ValidationResponse

func ValidationResponse(allowed bool, reason string) Response

ValidationResponse returns a response for admitting a request.

func (*Response) Complete added in v0.2.0

func (r *Response) Complete(req Request) error

Complete populates any fields that are yet to be set in the underlying AdmissionResponse, It mutates the response.

type Validator added in v0.2.0

type Validator interface {
	ValidateCreate() error
	ValidateUpdate(old runtime.Object) error
	ValidateDelete() error

Validator defines functions for validating an operation

type Webhook

type Webhook struct {
	// Handler actually processes an admission request returning whether it was allowed or denied,
	// and potentially patches to apply to the handler.
	Handler Handler
	// contains filtered or unexported fields

Webhook represents each individual webhook.

func DefaultingWebhookFor added in v0.2.0

func DefaultingWebhookFor(defaulter Defaulter) *Webhook

DefaultingWebhookFor creates a new Webhook for Defaulting the provided type.

func ValidatingWebhookFor added in v0.2.0

func ValidatingWebhookFor(validator Validator) *Webhook

ValidatingWebhookFor creates a new Webhook for validating the provided type.

func (*Webhook) GetDecoder added in v0.2.0

func (w *Webhook) GetDecoder() *Decoder

GetDecoder returns a decoder to decode the objects embedded in admission requests. It may be nil if we haven't received a scheme to use to determine object types yet.

func (*Webhook) Handle

func (w *Webhook) Handle(ctx context.Context, req Request) Response

Handle processes AdmissionRequest. If the webhook is mutating type, it delegates the AdmissionRequest to each handler and merge the patches. If the webhook is validating type, it delegates the AdmissionRequest to each handler and deny the request if anyone denies.

func (*Webhook) InjectFunc added in v0.2.0

func (w *Webhook) InjectFunc(f inject.Func) error

InjectFunc injects the field setter into the webhook.

func (*Webhook) InjectLogger added in v0.2.0

func (w *Webhook) InjectLogger(l logr.Logger) error

InjectLogger gets a handle to a logging instance, hopefully with more info about this particular webhook.

func (*Webhook) InjectScheme added in v0.2.0

func (w *Webhook) InjectScheme(s *runtime.Scheme) error

InjectScheme injects a scheme into the webhook, in order to construct a Decoder.

func (*Webhook) ServeHTTP

func (wh *Webhook) ServeHTTP(w http.ResponseWriter, r *http.Request)

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL