runtime

package
v1.14.10 Latest Latest
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 Go to latest Published: Dec 11, 2019 License: Apache-2.0, Apache-2.0 Imports: 29 Imported by: 0

Documentation

Overview

Package runtime defines conversions between generic types and structs to map query strings to struct objects.

Package runtime includes helper functions for working with API objects that follow the kubernetes API object conventions, which are:

0. Your API objects have a common metadata struct member, TypeMeta.

1. Your code refers to an internal set of API objects.

2. In a separate package, you have an external set of API objects.

3. The external set is considered to be versioned, and no breaking changes are ever made to it (fields may be added but not changed or removed).

4. As your api evolves, you'll make an additional versioned package with every major change.

5. Versioned packages have conversion functions which convert to and from the internal version.

6. You'll continue to support older versions according to your deprecation policy, and you can easily provide a program/library to update old versions into new versions because of 5.

7. All of your serializations and deserializations are handled in a centralized place.

Package runtime provides a conversion helper to make 5 easy, and the Encode/Decode/DecodeInto trio to accomplish 7. You can also register additional "codecs" which use a version of your choice. It's recommended that you register your types with runtime in your package's init function.

As a bonus, a few common types useful from all api objects and versions are provided in types.go. 

Package runtime is a generated protocol buffer package.

It is generated from these files:
	k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/runtime/generated.proto

It has these top-level messages:
	RawExtension
	TypeMeta
	Unknown

Index

Constants

View Source 
const (
	ContentTypeJSON string = "application/json"
	ContentTypeYAML string = "application/yaml"
)
View Source 
const (
	// APIVersionInternal may be used if you are registering a type that should not
	// be considered stable or serialized - it is a convention only and has no
	// special behavior in this package.
	APIVersionInternal = "__internal"
)

Variables

View Source 
var (
	ErrInvalidLengthGenerated = fmt.Errorf("proto: negative length found during unmarshaling")
	ErrIntOverflowGenerated   = fmt.Errorf("proto: integer overflow")
)
View Source 
var DefaultFramer = defaultFramer{}

DefaultFramer is valid for any stream that can read objects serially without any separation in the stream.

View Source 
var DefaultStringConversions = []interface{}{
	Convert_Slice_string_To_string,
	Convert_Slice_string_To_int,
	Convert_Slice_string_To_bool,
	Convert_Slice_string_To_int64,
}

DefaultStringConversions are helpers for converting []string and string to real values.

View Source 
var (

	// DefaultUnstructuredConverter performs unstructured to Go typed object conversions.
	DefaultUnstructuredConverter = &unstructuredConverter{
		mismatchDetection: parseBool(os.Getenv("KUBE_PATCH_CONVERSION_DETECTOR")),
		comparison: conversion.EqualitiesOrDie(
			func(a, b time.Time) bool {
				return a.UTC() == b.UTC()
			},
		),
	}
)

Functions

func CheckCodec 

func CheckCodec(c Codec, internalType Object, externalTypes ...schema.GroupVersionKind) error

CheckCodec makes sure that the codec can encode objects like internalType, decode all of the external types listed, and also decode them into the given object. (Will modify internalObject.) (Assumes JSON serialization.) TODO: verify that the correct external version is chosen on encode...

func Convert_Slice_string_To_bool 

func Convert_Slice_string_To_bool(input *[]string, out *bool, s conversion.Scope) error

Convert_Slice_string_To_bool will convert a string parameter to boolean. Only the absence of a value, a value of "false", or a value of "0" resolve to false. Any other value (including empty string) resolves to true.

func Convert_Slice_string_To_int 

func Convert_Slice_string_To_int(input *[]string, out *int, s conversion.Scope) error

func Convert_Slice_string_To_int64 

func Convert_Slice_string_To_int64(input *[]string, out *int64, s conversion.Scope) error

func Convert_Slice_string_To_string 

func Convert_Slice_string_To_string(input *[]string, out *string, s conversion.Scope) error

func Convert_runtime_Object_To_runtime_RawExtension 

func Convert_runtime_Object_To_runtime_RawExtension(in *Object, out *RawExtension, s conversion.Scope) error

func Convert_runtime_RawExtension_To_runtime_Object 

func Convert_runtime_RawExtension_To_runtime_Object(in *RawExtension, out *Object, s conversion.Scope) error

func DecodeInto 

func DecodeInto(d Decoder, data []byte, into Object) error

DecodeInto performs a Decode into the provided object.

func DecodeList 

func DecodeList(objects []Object, decoders ...Decoder) []error

DecodeList alters the list in place, attempting to decode any objects found in the list that have the Unknown type. Any errors that occur are returned after the entire list is processed. Decoders are tried in order.

func DeepCopyJSON added in v1.9.0 

func DeepCopyJSON(x map[string]interface{}) map[string]interface{}

DeepCopyJSON deep copies the passed value, assuming it is a valid JSON representation i.e. only contains types produced by json.Unmarshal() and also int64. bool, int64, float64, string, []interface{}, map[string]interface{}, json.Number and nil

func DeepCopyJSONValue added in v1.9.0 

func DeepCopyJSONValue(x interface{}) interface{}

DeepCopyJSONValue deep copies the passed value, assuming it is a valid JSON representation i.e. only contains types produced by json.Unmarshal() and also int64. bool, int64, float64, string, []interface{}, map[string]interface{}, json.Number and nil

func DefaultEmbeddedConversions 

func DefaultEmbeddedConversions() []interface{}

func DefaultMetaV1FieldSelectorConversion added in v1.8.0 

func DefaultMetaV1FieldSelectorConversion(label, value string) (string, string, error)

DefaultMetaV1FieldSelectorConversion auto-accepts metav1 values for name and namespace. A cluster scoped resource specifying namespace empty works fine and specifying a particular namespace will return no results, as expected.

func Encode 

func Encode(e Encoder, obj Object) ([]byte, error)

Encode is a convenience wrapper for encoding to a []byte from an Encoder

func EncodeList 

func EncodeList(e Encoder, objects []Object) error

EncodeList ensures that each object in an array is converted to a Unknown{} in serialized form. TODO: accept a content type.

func EncodeOrDie 

func EncodeOrDie(e Encoder, obj Object) string

EncodeOrDie is a version of Encode which will panic instead of returning an error. For tests.

func Field 

func Field(v reflect.Value, fieldName string, dest interface{}) error

Field puts the value of fieldName, which must be a member of v, into dest, which must be a variable to which this field's value can be assigned.

func FieldPtr 

func FieldPtr(v reflect.Value, fieldName string, dest interface{}) error

FieldPtr puts the address of fieldName, which must be a member of v, into dest, which must be an address of a variable to which this field's address can be assigned.

func IsMissingKind 

func IsMissingKind(err error) bool

IsMissingKind returns true if the error indicates that the provided object is missing a 'Kind' field.

func IsMissingVersion 

func IsMissingVersion(err error) bool

IsMissingVersion returns true if the error indicates that the provided object is missing a 'Version' field.

func IsNotRegisteredError 

func IsNotRegisteredError(err error) bool

IsNotRegisteredError returns true if the error indicates the provided object or input data is not registered.

func JSONKeyMapper 

func JSONKeyMapper(key string, sourceTag, destTag reflect.StructTag) (string, string)

JSONKeyMapper uses the struct tags on a conversion to determine the key value for the other side. Use when mapping from a map[string]* to a struct or vice versa.

func NewMissingKindErr 

func NewMissingKindErr(data string) error

func NewMissingVersionErr 

func NewMissingVersionErr(data string) error

func NewNotRegisteredErrForKind added in v1.7.0 

func NewNotRegisteredErrForKind(schemeName string, gvk schema.GroupVersionKind) error

func NewNotRegisteredErrForTarget added in v1.7.0 

func NewNotRegisteredErrForTarget(schemeName string, t reflect.Type, target GroupVersioner) error

func NewNotRegisteredErrForType added in v1.7.0 

func NewNotRegisteredErrForType(schemeName string, t reflect.Type) error

func NewNotRegisteredGVKErrForTarget added in v1.11.0 

func NewNotRegisteredGVKErrForTarget(schemeName string, gvk schema.GroupVersionKind, target GroupVersioner) error

func SetField 

func SetField(src interface{}, v reflect.Value, fieldName string) error

SetField puts the value of src, into fieldName, which must be a member of v. The value of src must be assignable to the field.

func SetZeroValue 

func SetZeroValue(objPtr Object) error

SetZeroValue would set the object of objPtr to zero value of its type.

func VerifySwaggerDocsExist 

func VerifySwaggerDocsExist(kubeTypes []KubeTypes, w io.Writer) (int, error)

VerifySwaggerDocsExist writes in a io.Writer a list of structs and fields that are missing of documentation.

func WriteSwaggerDocFunc 

func WriteSwaggerDocFunc(kubeTypes []KubeTypes, w io.Writer) error

WriteSwaggerDocFunc writes a declaration of a function as a string. This function is used in Swagger as a documentation source for structs and theirs fields

Types

type Codec 

type Codec Serializer

Codec is a Serializer that deals with the details of versioning objects. It offers the same interface as Serializer, so this is a marker to consumers that care about the version of the objects they receive.

func NewCodec 

func NewCodec(e Encoder, d Decoder) Codec

NewCodec creates a Codec from an Encoder and Decoder.

type Decoder 

type Decoder interface {
	// Decode attempts to deserialize the provided data using either the innate typing of the scheme or the
	// default kind, group, and version provided. It returns a decoded object as well as the kind, group, and
	// version from the serialized data, or an error. If into is non-nil, it will be used as the target type
	// and implementations may choose to use it rather than reallocating an object. However, the object is not
	// guaranteed to be populated. The returned object is not guaranteed to match into. If defaults are
	// provided, they are applied to the data by default. If no defaults or partial defaults are provided, the
	// type of the into may be used to guide conversion decisions.
	Decode(data []byte, defaults *schema.GroupVersionKind, into Object) (Object, *schema.GroupVersionKind, error)
}

Decoder attempts to load an object from data.

type Encoder 

type Encoder interface {
	// Encode writes an object to a stream. Implementations may return errors if the versions are
	// incompatible, or if no conversion is defined.
	Encode(obj Object, w io.Writer) error
}

Encoder writes objects to a serialized form

type FieldLabelConversionFunc 

type FieldLabelConversionFunc func(label, value string) (internalLabel, internalValue string, err error)

FieldLabelConversionFunc converts a field selector to internal representation.

type Framer 

type Framer interface {
	NewFrameReader(r io.ReadCloser) io.ReadCloser
	NewFrameWriter(w io.Writer) io.Writer
}

Framer is a factory for creating readers and writers that obey a particular framing pattern.

type GroupVersioner 

type GroupVersioner interface {
	// KindForGroupVersionKinds returns a desired target group version kind for the given input, or returns ok false if no
	// target is known. In general, if the return target is not in the input list, the caller is expected to invoke
	// Scheme.New(target) and then perform a conversion between the current Go type and the destination Go type.
	// Sophisticated implementations may use additional information about the input kinds to pick a destination kind.
	KindForGroupVersionKinds(kinds []schema.GroupVersionKind) (target schema.GroupVersionKind, ok bool)
}

GroupVersioner refines a set of possible conversion targets into a single option. 

var (
	// InternalGroupVersioner will always prefer the internal version for a given group version kind.
	InternalGroupVersioner GroupVersioner = internalGroupVersioner{}
	// DisabledGroupVersioner will reject all kinds passed to it.
	DisabledGroupVersioner GroupVersioner = disabledGroupVersioner{}
)

func NewCoercingMultiGroupVersioner added in v1.11.8 

func NewCoercingMultiGroupVersioner(gv schema.GroupVersion, groupKinds ...schema.GroupKind) GroupVersioner

NewCoercingMultiGroupVersioner returns the provided group version for any incoming kind. Incoming kinds that match the provided groupKinds are preferred. Kind may be empty in the provided group kind, in which case any kind will match. Examples: 

gv=mygroup/__internal, groupKinds=mygroup/Foo, anothergroup/Bar
KindForGroupVersionKinds(yetanother/v1/Baz, anothergroup/v1/Bar) -> mygroup/__internal/Bar (matched preferred group/kind)

gv=mygroup/__internal, groupKinds=mygroup, anothergroup
KindForGroupVersionKinds(yetanother/v1/Baz, anothergroup/v1/Bar) -> mygroup/__internal/Bar (matched preferred group)

gv=mygroup/__internal, groupKinds=mygroup, anothergroup
KindForGroupVersionKinds(yetanother/v1/Baz, yetanother/v1/Bar) -> mygroup/__internal/Baz (no preferred group/kind match, uses first kind in list)

func NewMultiGroupVersioner 

func NewMultiGroupVersioner(gv schema.GroupVersion, groupKinds ...schema.GroupKind) GroupVersioner

NewMultiGroupVersioner returns the provided group version for any kind that matches one of the provided group kinds. Kind may be empty in the provided group kind, in which case any kind will match.

type GroupVersioners 

type GroupVersioners []GroupVersioner

GroupVersioners implements GroupVersioner and resolves to the first exact match for any kind.

func (GroupVersioners) KindForGroupVersionKinds 

func (gvs GroupVersioners) KindForGroupVersionKinds(kinds []schema.GroupVersionKind) (schema.GroupVersionKind, bool)

KindForGroupVersionKinds returns the first match of any of the group versioners, or false if no match occurred.

type KubeTypes 

type KubeTypes []Pair

KubeTypes is an array to represent all available types in a parsed file. [0] is for the type itself

func ParseDocumentationFrom 

func ParseDocumentationFrom(src string) []KubeTypes

ParseDocumentationFrom gets all types' documentation and returns them as an array. Each type is again represented as an array (we have to use arrays as we need to be sure for the order of the fields). This function returns fields and struct definitions that have no documentation as {name, ""}.

type MultiObjectTyper 

type MultiObjectTyper []ObjectTyper

MultiObjectTyper returns the types of objects across multiple schemes in order.

func (MultiObjectTyper) ObjectKinds 

func (m MultiObjectTyper) ObjectKinds(obj Object) (gvks []schema.GroupVersionKind, unversionedType bool, err error)

func (MultiObjectTyper) Recognizes 

func (m MultiObjectTyper) Recognizes(gvk schema.GroupVersionKind) bool

type NegotiatedSerializer 

type NegotiatedSerializer interface {
	// SupportedMediaTypes is the media types supported for reading and writing single objects.
	SupportedMediaTypes() []SerializerInfo

	// EncoderForVersion returns an encoder that ensures objects being written to the provided
	// serializer are in the provided group version.
	EncoderForVersion(serializer Encoder, gv GroupVersioner) Encoder
	// DecoderForVersion returns a decoder that ensures objects being read by the provided
	// serializer are in the provided group version by default.
	DecoderToVersion(serializer Decoder, gv GroupVersioner) Decoder
}

NegotiatedSerializer is an interface used for obtaining encoders, decoders, and serializers for multiple supported media types. This would commonly be accepted by a server component that performs HTTP content negotiation to accept multiple formats.

type NestedObjectDecoder 

type NestedObjectDecoder interface {
	DecodeNestedObjects(d Decoder) error
}

NestedObjectDecoder is an optional interface that objects may implement to be given an opportunity to decode any nested Objects / RawExtensions during serialization.

type NestedObjectEncoder 

type NestedObjectEncoder interface {
	EncodeNestedObjects(e Encoder) error
}

NestedObjectEncoder is an optional interface that objects may implement to be given an opportunity to encode any nested Objects / RawExtensions during serialization.

type NoopDecoder 

type NoopDecoder struct {
	Encoder
}

NoopDecoder converts an Encoder to a Serializer or Codec for code that expects them but only uses encoding.

func (NoopDecoder) Decode 

func (n NoopDecoder) Decode(data []byte, gvk *schema.GroupVersionKind, into Object) (Object, *schema.GroupVersionKind, error)

type NoopEncoder 

type NoopEncoder struct {
	Decoder
}

NoopEncoder converts an Decoder to a Serializer or Codec for code that expects them but only uses decoding.

func (NoopEncoder) Encode 

func (n NoopEncoder) Encode(obj Object, w io.Writer) error

type Object 

type Object interface {
	GetObjectKind() schema.ObjectKind
	DeepCopyObject() Object
}

Object interface must be supported by all API types registered with Scheme. Since objects in a scheme are expected to be serialized to the wire, the interface an Object must provide to the Scheme allows serializers to set the kind, version, and group the object is represented as. An Object may choose to return a no-op ObjectKindAccessor in cases where it is not expected to be serialized.

func Decode 

func Decode(d Decoder, data []byte) (Object, error)

Decode is a convenience wrapper for decoding data into an Object.

func NewEncodable 

func NewEncodable(e Encoder, obj Object, versions ...schema.GroupVersion) Object

NewEncodable creates an object that will be encoded with the provided codec on demand. Provided as a convenience for test cases dealing with internal objects.

func NewEncodableList 

func NewEncodableList(e Encoder, objects []Object, versions ...schema.GroupVersion) []Object

NewEncodableList creates an object that will be encoded with the provided codec on demand. Provided as a convenience for test cases dealing with internal objects.

func UseOrCreateObject 

func UseOrCreateObject(t ObjectTyper, c ObjectCreater, gvk schema.GroupVersionKind, obj Object) (Object, error)

UseOrCreateObject returns obj if the canonical ObjectKind returned by the provided typer matches gvk, or invokes the ObjectCreator to instantiate a new gvk. Returns an error if the typer cannot find the object.

type ObjectConvertor 

type ObjectConvertor interface {
	// Convert attempts to convert one object into another, or returns an error. This
	// method does not mutate the in object, but the in and out object might share data structures,
	// i.e. the out object cannot be mutated without mutating the in object as well.
	// The context argument will be passed to all nested conversions.
	Convert(in, out, context interface{}) error
	// ConvertToVersion takes the provided object and converts it the provided version. This
	// method does not mutate the in object, but the in and out object might share data structures,
	// i.e. the out object cannot be mutated without mutating the in object as well.
	// This method is similar to Convert() but handles specific details of choosing the correct
	// output version.
	ConvertToVersion(in Object, gv GroupVersioner) (out Object, err error)
	ConvertFieldLabel(gvk schema.GroupVersionKind, label, value string) (string, string, error)
}

ObjectConvertor converts an object to a different version.

func UnsafeObjectConvertor 

func UnsafeObjectConvertor(scheme *Scheme) ObjectConvertor

UnsafeObjectConvertor performs object conversion without copying the object structure, for use when the converted object will not be reused or mutated. Primarily for use within versioned codecs, which use the external object for serialization but do not return it.

type ObjectCreater 

type ObjectCreater interface {
	New(kind schema.GroupVersionKind) (out Object, err error)
}

ObjectCreater contains methods for instantiating an object by kind and version.

type ObjectDefaulter 

type ObjectDefaulter interface {
	// Default takes an object (must be a pointer) and applies any default values.
	// Defaulters may not error.
	Default(in Object)
}

type ObjectTyper 

type ObjectTyper interface {
	// ObjectKinds returns the all possible group,version,kind of the provided object, true if
	// the object is unversioned, or an error if the object is not recognized
	// (IsNotRegisteredError will return true).
	ObjectKinds(Object) ([]schema.GroupVersionKind, bool, error)
	// Recognizes returns true if the scheme is able to handle the provided version and kind,
	// or more precisely that the provided version is a possible conversion or decoding
	// target.
	Recognizes(gvk schema.GroupVersionKind) bool
}

ObjectTyper contains methods for extracting the APIVersion and Kind of objects.

type ObjectVersioner 

type ObjectVersioner interface {
	ConvertToVersion(in Object, gv GroupVersioner) (out Object, err error)
}

type Pair 

type Pair struct {
	Name, Doc string
}

Pair of strings. We keed the name of fields and the doc

type ParameterCodec 

type ParameterCodec interface {
	// DecodeParameters takes the given url.Values in the specified group version and decodes them
	// into the provided object, or returns an error.
	DecodeParameters(parameters url.Values, from schema.GroupVersion, into Object) error
	// EncodeParameters encodes the provided object as query parameters or returns an error.
	EncodeParameters(obj Object, to schema.GroupVersion) (url.Values, error)
}

ParameterCodec defines methods for serializing and deserializing API objects to url.Values and performing any necessary conversion. Unlike the normal Codec, query parameters are not self describing and the desired version must be specified.

func NewParameterCodec 

func NewParameterCodec(scheme *Scheme) ParameterCodec

NewParameterCodec creates a ParameterCodec capable of transforming url values into versioned objects and back.

type ProtobufMarshaller 

type ProtobufMarshaller interface {
	MarshalTo(data []byte) (int, error)
}

type RawExtension 

type RawExtension struct {
	// Raw is the underlying serialization of this object.
	//
	// TODO: Determine how to detect ContentType and ContentEncoding of 'Raw' data.
	Raw []byte `protobuf:"bytes,1,opt,name=raw"`
	// Object can hold a representation of this extension - useful for working with versioned
	// structs.
	Object Object `json:"-"`
}

RawExtension is used to hold extensions in external versions.

To use this, make a field which has RawExtension as its type in your external, versioned struct, and Object in your internal struct. You also need to register your various plugin types.

// Internal package: 

type MyAPIObject struct {
	runtime.TypeMeta `json:",inline"`
	MyPlugin runtime.Object `json:"myPlugin"`
}

type PluginA struct {
	AOption string `json:"aOption"`
}

// External package: 

type MyAPIObject struct {
	runtime.TypeMeta `json:",inline"`
	MyPlugin runtime.RawExtension `json:"myPlugin"`
}

type PluginA struct {
	AOption string `json:"aOption"`
}

// On the wire, the JSON will look something like this: 

{
	"kind":"MyAPIObject",
	"apiVersion":"v1",
	"myPlugin": {
		"kind":"PluginA",
		"aOption":"foo",
	},
}

So what happens? Decode first uses json or yaml to unmarshal the serialized data into your external MyAPIObject. That causes the raw JSON to be stored, but not unpacked. The next step is to copy (using pkg/conversion) into the internal struct. The runtime package's DefaultScheme has conversion functions installed which will unpack the JSON stored in RawExtension, turning it into the correct object type, and storing it in the Object. (TODO: In the case where the object is of an unknown type, a runtime.Unknown object will be created and stored.)

+k8s:deepcopy-gen=true +protobuf=true +k8s:openapi-gen=true

func (*RawExtension) DeepCopy added in v1.8.0 

func (in *RawExtension) DeepCopy() *RawExtension

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new RawExtension.

func (*RawExtension) DeepCopyInto added in v1.8.0 

func (in *RawExtension) DeepCopyInto(out *RawExtension)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

func (*RawExtension) Descriptor 

func (*RawExtension) Descriptor() ([]byte, []int)

func (*RawExtension) Marshal 

func (m *RawExtension) Marshal() (dAtA []byte, err error)

func (RawExtension) MarshalJSON 

func (re RawExtension) MarshalJSON() ([]byte, error)

MarshalJSON may get called on pointers or values, so implement MarshalJSON on value. http://stackoverflow.com/questions/21390979/custom-marshaljson-never-gets-called-in-go

func (*RawExtension) MarshalTo 

func (m *RawExtension) MarshalTo(dAtA []byte) (int, error)

func (*RawExtension) ProtoMessage 

func (*RawExtension) ProtoMessage()

func (*RawExtension) Reset 

func (m *RawExtension) Reset()

func (*RawExtension) Size 

func (m *RawExtension) Size() (n int)

func (*RawExtension) String 

func (this *RawExtension) String() string

func (*RawExtension) Unmarshal 

func (m *RawExtension) Unmarshal(dAtA []byte) error

func (*RawExtension) UnmarshalJSON 

func (re *RawExtension) UnmarshalJSON(in []byte) error

type ResourceVersioner 

type ResourceVersioner interface {
	SetResourceVersion(obj Object, version string) error
	ResourceVersion(obj Object) (string, error)
}

ResourceVersioner provides methods for setting and retrieving the resource version from an API object.

type Scheme 

type Scheme struct {
	// contains filtered or unexported fields
}

Scheme defines methods for serializing and deserializing API objects, a type registry for converting group, version, and kind information to and from Go schemas, and mappings between Go schemas of different versions. A scheme is the foundation for a versioned API and versioned configuration over time.

In a Scheme, a Type is a particular Go struct, a Version is a point-in-time identifier for a particular representation of that Type (typically backwards compatible), a Kind is the unique name for that Type within the Version, and a Group identifies a set of Versions, Kinds, and Types that evolve over time. An Unversioned Type is one that is not yet formally bound to a type and is promised to be backwards compatible (effectively a "v1" of a Type that does not expect to break in the future).

Schemes are not expected to change at runtime and are only threadsafe after registration is complete.

func NewScheme 

func NewScheme() *Scheme

NewScheme creates a new Scheme. This scheme is pluggable by default.

func (*Scheme) AddConversionFunc added in v1.12.0 

func (s *Scheme) AddConversionFunc(a, b interface{}, fn conversion.ConversionFunc) error

AddConversionFunc registers a function that converts between a and b by passing objects of those types to the provided function. The function *must* accept objects of a and b - this machinery will not enforce any other guarantee.

func (*Scheme) AddConversionFuncs 

func (s *Scheme) AddConversionFuncs(conversionFuncs ...interface{}) error

AddConversionFuncs adds functions to the list of conversion functions. The given functions should know how to convert between two of your API objects, or their sub-objects. We deduce how to call these functions from the types of their two parameters; see the comment for Converter.Register.

Note that, if you need to copy sub-objects that didn't change, you can use the conversion.Scope object that will be passed to your conversion function. Additionally, all conversions started by Scheme will set the SrcVersion and DestVersion fields on the Meta object. Example:

s.AddConversionFuncs( 

func(in *InternalObject, out *ExternalObject, scope conversion.Scope) error {
	// You can depend on Meta() being non-nil, and this being set to
	// the source version, e.g., ""
	s.Meta().SrcVersion
	// You can depend on this being set to the destination version,
	// e.g., "v1".
	s.Meta().DestVersion
	// Call scope.Convert to copy sub-fields.
	s.Convert(&in.SubFieldThatMoved, &out.NewLocation.NewName, 0)
	return nil
},

)

(For more detail about conversion functions, see Converter.Register's comment.)

Also note that the default behavior, if you don't add a conversion function, is to sanely copy fields that have the same names and same type names. It's OK if the destination type has extra fields, but it must not remove any. So you only need to add conversion functions for things with changed/removed fields.

func (*Scheme) AddFieldLabelConversionFunc 

func (s *Scheme) AddFieldLabelConversionFunc(gvk schema.GroupVersionKind, conversionFunc FieldLabelConversionFunc) error

AddFieldLabelConversionFunc adds a conversion function to convert field selectors of the given kind from the given version to internal version representation.

func (*Scheme) AddGeneratedConversionFunc added in v1.12.0 

func (s *Scheme) AddGeneratedConversionFunc(a, b interface{}, fn conversion.ConversionFunc) error

AddGeneratedConversionFunc registers a function that converts between a and b by passing objects of those types to the provided function. The function *must* accept objects of a and b - this machinery will not enforce any other guarantee.

func (*Scheme) AddIgnoredConversionType 

func (s *Scheme) AddIgnoredConversionType(from, to interface{}) error

AddIgnoredConversionType identifies a pair of types that should be skipped by conversion (because the data inside them is explicitly dropped during conversion).

func (*Scheme) AddKnownTypeWithName 

func (s *Scheme) AddKnownTypeWithName(gvk schema.GroupVersionKind, obj Object)

AddKnownTypeWithName is like AddKnownTypes, but it lets you specify what this type should be encoded as. Useful for testing when you don't want to make multiple packages to define your structs. Version may not be empty - use the APIVersionInternal constant if you have a type that does not have a formal version.

func (*Scheme) AddKnownTypes 

func (s *Scheme) AddKnownTypes(gv schema.GroupVersion, types ...Object)

AddKnownTypes registers all types passed in 'types' as being members of version 'version'. All objects passed to types should be pointers to structs. The name that go reports for the struct becomes the "kind" field when encoding. Version may not be empty - use the APIVersionInternal constant if you have a type that does not have a formal version.

func (*Scheme) AddTypeDefaultingFunc 

func (s *Scheme) AddTypeDefaultingFunc(srcType Object, fn func(interface{}))

AddTypeDefaultingFunc registers a function that is passed a pointer to an object and can default fields on the object. These functions will be invoked when Default() is called. The function will never be called unless the defaulted object matches srcType. If this function is invoked twice with the same srcType, the fn passed to the later call will be used instead.

func (*Scheme) AddUnversionedTypes 

func (s *Scheme) AddUnversionedTypes(version schema.GroupVersion, types ...Object)

AddUnversionedTypes registers the provided types as "unversioned", which means that they follow special rules. Whenever an object of this type is serialized, it is serialized with the provided group version and is not converted. Thus unversioned objects are expected to remain backwards compatible forever, as if they were in an API group and version that would never be updated.

TODO: there is discussion about removing unversioned and replacing it with objects that are manifest into 

every version with particular schemas. Resolve this method at that point.

func (*Scheme) AllKnownTypes 

func (s *Scheme) AllKnownTypes() map[schema.GroupVersionKind]reflect.Type

AllKnownTypes returns the all known types.

func (*Scheme) Convert 

func (s *Scheme) Convert(in, out interface{}, context interface{}) error

Convert will attempt to convert in into out. Both must be pointers. For easy testing of conversion functions. Returns an error if the conversion isn't possible. You can call this with types that haven't been registered (for example, a to test conversion of types that are nested within registered types). The context interface is passed to the convertor. Convert also supports Unstructured types and will convert them intelligently.

func (*Scheme) ConvertFieldLabel 

func (s *Scheme) ConvertFieldLabel(gvk schema.GroupVersionKind, label, value string) (string, string, error)

ConvertFieldLabel alters the given field label and value for an kind field selector from versioned representation to an unversioned one or returns an error.

func (*Scheme) ConvertToVersion 

func (s *Scheme) ConvertToVersion(in Object, target GroupVersioner) (Object, error)

ConvertToVersion attempts to convert an input object to its matching Kind in another version within this scheme. Will return an error if the provided version does not contain the inKind (or a mapping by name defined with AddKnownTypeWithName). Will also return an error if the conversion does not result in a valid Object being returned. Passes target down to the conversion methods as the Context on the scope.

func (*Scheme) Converter 

func (s *Scheme) Converter() *conversion.Converter

Converter allows access to the converter for the scheme

func (*Scheme) Default 

func (s *Scheme) Default(src Object)

Default sets defaults on the provided Object.

func (*Scheme) IsGroupRegistered added in v1.11.0 

func (s *Scheme) IsGroupRegistered(group string) bool

IsGroupRegistered returns true if types for the group have been registered with the scheme

func (*Scheme) IsUnversioned 

func (s *Scheme) IsUnversioned(obj Object) (bool, bool)

func (*Scheme) IsVersionRegistered added in v1.11.0 

func (s *Scheme) IsVersionRegistered(version schema.GroupVersion) bool

IsVersionRegistered returns true if types for the version have been registered with the scheme

func (*Scheme) KnownTypes 

func (s *Scheme) KnownTypes(gv schema.GroupVersion) map[string]reflect.Type

KnownTypes returns the types known for the given version.

func (*Scheme) Log 

func (s *Scheme) Log(l conversion.DebugLogger)

Log sets a logger on the scheme. For test purposes only

func (*Scheme) Name added in v1.12.0 

func (s *Scheme) Name() string

func (*Scheme) New 

func (s *Scheme) New(kind schema.GroupVersionKind) (Object, error)

New returns a new API object of the given version and name, or an error if it hasn't been registered. The version and kind fields must be specified.

func (*Scheme) ObjectKinds 

func (s *Scheme) ObjectKinds(obj Object) ([]schema.GroupVersionKind, bool, error)

ObjectKinds returns all possible group,version,kind of the go object, true if the object is considered unversioned, or an error if it's not a pointer or is unregistered.

func (*Scheme) PreferredVersionAllGroups added in v1.11.0 

func (s *Scheme) PreferredVersionAllGroups() []schema.GroupVersion

PreferredVersionAllGroups returns the most preferred version for every group. group ordering is random.

func (*Scheme) PrioritizedVersionsAllGroups added in v1.11.0 

func (s *Scheme) PrioritizedVersionsAllGroups() []schema.GroupVersion

PrioritizedVersionsAllGroups returns all known versions in their priority order. Groups are random, but versions for a single group are prioritized

func (*Scheme) PrioritizedVersionsForGroup added in v1.11.0 

func (s *Scheme) PrioritizedVersionsForGroup(group string) []schema.GroupVersion

PrioritizedVersionsForGroup returns versions for a single group in priority order

func (*Scheme) Recognizes 

func (s *Scheme) Recognizes(gvk schema.GroupVersionKind) bool

Recognizes returns true if the scheme is able to handle the provided group,version,kind of an object.

func (*Scheme) RegisterInputDefaults 

func (s *Scheme) RegisterInputDefaults(in interface{}, fn conversion.FieldMappingFunc, defaultFlags conversion.FieldMatchingFlags) error

RegisterInputDefaults sets the provided field mapping function and field matching as the defaults for the provided input type. The fn may be nil, in which case no mapping will happen by default. Use this method to register a mechanism for handling a specific input type in conversion, such as a map[string]string to structs.

func (*Scheme) SetVersionPriority added in v1.11.0 

func (s *Scheme) SetVersionPriority(versions ...schema.GroupVersion) error

SetVersionPriority allows specifying a precise order of priority. All specified versions must be in the same group, and the specified order overwrites any previously specified order for this group

func (*Scheme) UnsafeConvertToVersion 

func (s *Scheme) UnsafeConvertToVersion(in Object, target GroupVersioner) (Object, error)

UnsafeConvertToVersion will convert in to the provided target if such a conversion is possible, but does not guarantee the output object does not share fields with the input object. It attempts to be as efficient as possible when doing conversion.

type SchemeBuilder 

type SchemeBuilder []func(*Scheme) error

SchemeBuilder collects functions that add things to a scheme. It's to allow code to compile without explicitly referencing generated types. You should declare one in each package that will have generated deep copy or conversion functions.

func NewSchemeBuilder 

func NewSchemeBuilder(funcs ...func(*Scheme) error) SchemeBuilder

NewSchemeBuilder calls Register for you.

func (*SchemeBuilder) AddToScheme 

func (sb *SchemeBuilder) AddToScheme(s *Scheme) error

AddToScheme applies all the stored functions to the scheme. A non-nil error indicates that one function failed and the attempt was abandoned.

func (*SchemeBuilder) Register 

func (sb *SchemeBuilder) Register(funcs ...func(*Scheme) error)

Register adds a scheme setup function to the list.

type SelfLinker 

type SelfLinker interface {
	SetSelfLink(obj Object, selfLink string) error
	SelfLink(obj Object) (string, error)

	// Knowing Name is sometimes necessary to use a SelfLinker.
	Name(obj Object) (string, error)
	// Knowing Namespace is sometimes necessary to use a SelfLinker
	Namespace(obj Object) (string, error)
}

SelfLinker provides methods for setting and retrieving the SelfLink field of an API object.

type Serializer 

type Serializer interface {
	Encoder
	Decoder
}

Serializer is the core interface for transforming objects into a serialized format and back. Implementations may choose to perform conversion of the object, but no assumptions should be made.

func NewBase64Serializer 

func NewBase64Serializer(e Encoder, d Decoder) Serializer

type SerializerInfo 

type SerializerInfo struct {
	// MediaType is the value that represents this serializer over the wire.
	MediaType string
	// EncodesAsText indicates this serializer can be encoded to UTF-8 safely.
	EncodesAsText bool
	// Serializer is the individual object serializer for this media type.
	Serializer Serializer
	// PrettySerializer, if set, can serialize this object in a form biased towards
	// readability.
	PrettySerializer Serializer
	// StreamSerializer, if set, describes the streaming serialization format
	// for this media type.
	StreamSerializer *StreamSerializerInfo
}

SerializerInfo contains information about a specific serialization format

func SerializerInfoForMediaType 

func SerializerInfoForMediaType(types []SerializerInfo, mediaType string) (SerializerInfo, bool)

SerializerInfoForMediaType returns the first info in types that has a matching media type (which cannot include media-type parameters), or the first info with an empty media type, or false if no type matches.

type StorageSerializer 

type StorageSerializer interface {
	// SupportedMediaTypes are the media types supported for reading and writing objects.
	SupportedMediaTypes() []SerializerInfo

	// UniversalDeserializer returns a Serializer that can read objects in multiple supported formats
	// by introspecting the data at rest.
	UniversalDeserializer() Decoder

	// EncoderForVersion returns an encoder that ensures objects being written to the provided
	// serializer are in the provided group version.
	EncoderForVersion(serializer Encoder, gv GroupVersioner) Encoder
	// DecoderForVersion returns a decoder that ensures objects being read by the provided
	// serializer are in the provided group version by default.
	DecoderToVersion(serializer Decoder, gv GroupVersioner) Decoder
}

StorageSerializer is an interface used for obtaining encoders, decoders, and serializers that can read and write data at rest. This would commonly be used by client tools that must read files, or server side storage interfaces that persist restful objects.

type StreamSerializerInfo 

type StreamSerializerInfo struct {
	// EncodesAsText indicates this serializer can be encoded to UTF-8 safely.
	EncodesAsText bool
	// Serializer is the top level object serializer for this type when streaming
	Serializer
	// Framer is the factory for retrieving streams that separate objects on the wire
	Framer
}

StreamSerializerInfo contains information about a specific stream serialization format

type TypeMeta 

type TypeMeta struct {
	// +optional
	APIVersion string `json:"apiVersion,omitempty" yaml:"apiVersion,omitempty" protobuf:"bytes,1,opt,name=apiVersion"`
	// +optional
	Kind string `json:"kind,omitempty" yaml:"kind,omitempty" protobuf:"bytes,2,opt,name=kind"`
}

TypeMeta is shared by all top level objects. The proper way to use it is to inline it in your type, like this: 

type MyAwesomeAPIObject struct {
     runtime.TypeMeta    `json:",inline"`
     ... // other fields
}

func (obj *MyAwesomeAPIObject) SetGroupVersionKind(gvk *metav1.GroupVersionKind) { metav1.UpdateTypeMeta(obj,gvk) }; GroupVersionKind() *GroupVersionKind

TypeMeta is provided here for convenience. You may use it directly from this package or define your own with the same fields.

+k8s:deepcopy-gen=false +protobuf=true +k8s:openapi-gen=true

func (*TypeMeta) Descriptor 

func (*TypeMeta) Descriptor() ([]byte, []int)

func (*TypeMeta) GetObjectKind added in v1.8.0 

func (obj *TypeMeta) GetObjectKind() schema.ObjectKind

func (*TypeMeta) GroupVersionKind 

func (obj *TypeMeta) GroupVersionKind() schema.GroupVersionKind

GroupVersionKind satisfies the ObjectKind interface for all objects that embed TypeMeta

func (*TypeMeta) Marshal 

func (m *TypeMeta) Marshal() (dAtA []byte, err error)

func (*TypeMeta) MarshalTo 

func (m *TypeMeta) MarshalTo(dAtA []byte) (int, error)

func (*TypeMeta) ProtoMessage 

func (*TypeMeta) ProtoMessage()

func (*TypeMeta) Reset 

func (m *TypeMeta) Reset()

func (*TypeMeta) SetGroupVersionKind 

func (obj *TypeMeta) SetGroupVersionKind(gvk schema.GroupVersionKind)

SetGroupVersionKind satisfies the ObjectKind interface for all objects that embed TypeMeta

func (*TypeMeta) Size 

func (m *TypeMeta) Size() (n int)

func (*TypeMeta) String 

func (this *TypeMeta) String() string

func (*TypeMeta) Unmarshal 

func (m *TypeMeta) Unmarshal(dAtA []byte) error

type Unknown 

type Unknown struct {
	TypeMeta `json:",inline" protobuf:"bytes,1,opt,name=typeMeta"`
	// Raw will hold the complete serialized object which couldn't be matched
	// with a registered type. Most likely, nothing should be done with this
	// except for passing it through the system.
	Raw []byte `protobuf:"bytes,2,opt,name=raw"`
	// ContentEncoding is encoding used to encode 'Raw' data.
	// Unspecified means no encoding.
	ContentEncoding string `protobuf:"bytes,3,opt,name=contentEncoding"`
	// ContentType  is serialization method used to serialize 'Raw'.
	// Unspecified means ContentTypeJSON.
	ContentType string `protobuf:"bytes,4,opt,name=contentType"`
}

Unknown allows api objects with unknown types to be passed-through. This can be used to deal with the API objects from a plug-in. Unknown objects still have functioning TypeMeta features-- kind, version, etc. TODO: Make this object have easy access to field based accessors and settors for metadata and field mutatation.

+k8s:deepcopy-gen=true +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object +protobuf=true +k8s:openapi-gen=true

func (*Unknown) DeepCopy added in v1.8.0 

func (in *Unknown) DeepCopy() *Unknown

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Unknown.

func (*Unknown) DeepCopyInto added in v1.8.0 

func (in *Unknown) DeepCopyInto(out *Unknown)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

func (*Unknown) DeepCopyObject added in v1.8.0 

func (in *Unknown) DeepCopyObject() Object

DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new Object.

func (*Unknown) Descriptor 

func (*Unknown) Descriptor() ([]byte, []int)

func (*Unknown) Marshal 

func (m *Unknown) Marshal() (dAtA []byte, err error)

func (Unknown) MarshalJSON 

func (e Unknown) MarshalJSON() ([]byte, error)

Marshal may get called on pointers or values, so implement MarshalJSON on value. http://stackoverflow.com/questions/21390979/custom-marshaljson-never-gets-called-in-go

func (*Unknown) MarshalTo 

func (m *Unknown) MarshalTo(dAtA []byte) (int, error)

func (*Unknown) NestedMarshalTo 

func (m *Unknown) NestedMarshalTo(data []byte, b ProtobufMarshaller, size uint64) (int, error)

NestedMarshalTo allows a caller to avoid extra allocations during serialization of an Unknown that will contain an object that implements ProtobufMarshaller.

func (*Unknown) ProtoMessage 

func (*Unknown) ProtoMessage()

func (*Unknown) Reset 

func (m *Unknown) Reset()

func (*Unknown) Size 

func (m *Unknown) Size() (n int)

func (*Unknown) String 

func (this *Unknown) String() string

func (*Unknown) Unmarshal 

func (m *Unknown) Unmarshal(dAtA []byte) error

func (*Unknown) UnmarshalJSON 

func (e *Unknown) UnmarshalJSON(in []byte) error

type Unstructured 

type Unstructured interface {
	Object
	// UnstructuredContent returns a non-nil map with this object's contents. Values may be
	// []interface{}, map[string]interface{}, or any primitive type. Contents are typically serialized to
	// and from JSON. SetUnstructuredContent should be used to mutate the contents.
	UnstructuredContent() map[string]interface{}
	// SetUnstructuredContent updates the object content to match the provided map.
	SetUnstructuredContent(map[string]interface{})
	// IsList returns true if this type is a list or matches the list convention - has an array called "items".
	IsList() bool
	// EachListItem should pass a single item out of the list as an Object to the provided function. Any
	// error should terminate the iteration. If IsList() returns false, this method should return an error
	// instead of calling the provided function.
	EachListItem(func(Object) error) error
}

Unstructured objects store values as map[string]interface{}, with only values that can be serialized to JSON allowed.

type UnstructuredConverter added in v1.9.0 

type UnstructuredConverter interface {
	ToUnstructured(obj interface{}) (map[string]interface{}, error)
	FromUnstructured(u map[string]interface{}, obj interface{}) error
}

UnstructuredConverter is an interface for converting between interface{} and map[string]interface representation.

func NewTestUnstructuredConverter added in v1.9.0 

func NewTestUnstructuredConverter(comparison conversion.Equalities) UnstructuredConverter

NewTestUnstructuredConverter creates an UnstructuredConverter that accepts JSON typed maps and translates them to Go types via reflection. It performs mismatch detection automatically and is intended for use by external test tools. Use DefaultUnstructuredConverter if you do not explicitly need mismatch detection.

type VersionedObjects 

type VersionedObjects struct {
	// Objects is the set of objects retrieved during decoding, in order of conversion.
	// The 0 index is the object as serialized on the wire. If conversion has occurred,
	// other objects may be present. The right most object is the same as would be returned
	// by a normal Decode call.
	Objects []Object
}

VersionedObjects is used by Decoders to give callers a way to access all versions of an object during the decoding process.

+k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object +k8s:deepcopy-gen=true

func (*VersionedObjects) DeepCopy added in v1.8.0 

func (in *VersionedObjects) DeepCopy() *VersionedObjects

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new VersionedObjects.

func (*VersionedObjects) DeepCopyInto added in v1.8.0 

func (in *VersionedObjects) DeepCopyInto(out *VersionedObjects)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

func (*VersionedObjects) DeepCopyObject added in v1.8.0 

func (in *VersionedObjects) DeepCopyObject() Object

DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new Object.

func (*VersionedObjects) First 

func (obj *VersionedObjects) First() Object

First returns the leftmost object in the VersionedObjects array, which is usually the object as serialized on the wire.

func (*VersionedObjects) GetObjectKind 

func (obj *VersionedObjects) GetObjectKind() schema.ObjectKind

GetObjectKind implements Object for VersionedObjects, returning an empty ObjectKind interface if no objects are provided, or the ObjectKind interface of the object in the highest array position.

func (*VersionedObjects) Last 

func (obj *VersionedObjects) Last() Object

Last is the rightmost object in the VersionedObjects array, which is the object after all transformations have been applied. This is the same object that would be returned by Decode in a normal invocation (without VersionedObjects in the into argument).

Source Files

View all Source files

Directories

Path Synopsis
Package schema is a generated protocol buffer package.
 Package schema is a generated protocol buffer package.
json
protobuf
Package protobuf provides a Kubernetes serializer for the protobuf format.
 Package protobuf provides a Kubernetes serializer for the protobuf format.
recognizer
streaming
Package streaming implements encoder and decoder for streams of runtime.Objects over io.Writer/Readers.
 Package streaming implements encoder and decoder for streams of runtime.Objects over io.Writer/Readers.
testing
versioning
yaml

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