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(feat) Add auto-discovery in k8s | Adarsh

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This commit is contained in:
Adarsh K Kumar
2020-10-30 21:00:03 +05:30
parent d76caeeb35
commit 81e6e0b188
1170 changed files with 441034 additions and 14 deletions
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303
vendor/k8s.io/apimachinery/pkg/runtime/serializer/json/json.go generated vendored Normal file
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/*
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 json
import (
"encoding/json"
"io"
"strconv"
"unsafe"
jsoniter "github.com/json-iterator/go"
"github.com/modern-go/reflect2"
"sigs.k8s.io/yaml"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/runtime/serializer/recognizer"
"k8s.io/apimachinery/pkg/util/framer"
utilyaml "k8s.io/apimachinery/pkg/util/yaml"
)
// NewSerializer creates a JSON serializer that handles encoding versioned objects into the proper JSON form. If typer
// is not nil, the object has the group, version, and kind fields set.
func NewSerializer(meta MetaFactory, creater runtime.ObjectCreater, typer runtime.ObjectTyper, pretty bool) *Serializer {
return &Serializer{
meta: meta,
creater: creater,
typer: typer,
yaml: false,
pretty: pretty,
}
}
// NewYAMLSerializer creates a YAML serializer that handles encoding versioned objects into the proper YAML form. If typer
// is not nil, the object has the group, version, and kind fields set. This serializer supports only the subset of YAML that
// matches JSON, and will error if constructs are used that do not serialize to JSON.
func NewYAMLSerializer(meta MetaFactory, creater runtime.ObjectCreater, typer runtime.ObjectTyper) *Serializer {
return &Serializer{
meta: meta,
creater: creater,
typer: typer,
yaml: true,
}
}
type Serializer struct {
meta MetaFactory
creater runtime.ObjectCreater
typer runtime.ObjectTyper
yaml bool
pretty bool
}
// Serializer implements Serializer
var _ runtime.Serializer = &Serializer{}
var _ recognizer.RecognizingDecoder = &Serializer{}
type customNumberExtension struct {
jsoniter.DummyExtension
}
func (cne *customNumberExtension) CreateDecoder(typ reflect2.Type) jsoniter.ValDecoder {
if typ.String() == "interface {}" {
return customNumberDecoder{}
}
return nil
}
type customNumberDecoder struct {
}
func (customNumberDecoder) Decode(ptr unsafe.Pointer, iter *jsoniter.Iterator) {
switch iter.WhatIsNext() {
case jsoniter.NumberValue:
var number jsoniter.Number
iter.ReadVal(&number)
i64, err := strconv.ParseInt(string(number), 10, 64)
if err == nil {
*(*interface{})(ptr) = i64
return
}
f64, err := strconv.ParseFloat(string(number), 64)
if err == nil {
*(*interface{})(ptr) = f64
return
}
iter.ReportError("DecodeNumber", err.Error())
default:
*(*interface{})(ptr) = iter.Read()
}
}
// CaseSensitiveJsonIterator returns a jsoniterator API that's configured to be
// case-sensitive when unmarshalling, and otherwise compatible with
// the encoding/json standard library.
func CaseSensitiveJsonIterator() jsoniter.API {
config := jsoniter.Config{
EscapeHTML: true,
SortMapKeys: true,
ValidateJsonRawMessage: true,
CaseSensitive: true,
}.Froze()
// Force jsoniter to decode number to interface{} via int64/float64, if possible.
config.RegisterExtension(&customNumberExtension{})
return config
}
// Private copy of jsoniter to try to shield against possible mutations
// from outside. Still does not protect from package level jsoniter.Register*() functions - someone calling them
// in some other library will mess with every usage of the jsoniter library in the whole program.
// See https://github.com/json-iterator/go/issues/265
var caseSensitiveJsonIterator = CaseSensitiveJsonIterator()
// gvkWithDefaults returns group kind and version defaulting from provided default
func gvkWithDefaults(actual, defaultGVK schema.GroupVersionKind) schema.GroupVersionKind {
if len(actual.Kind) == 0 {
actual.Kind = defaultGVK.Kind
}
if len(actual.Version) == 0 && len(actual.Group) == 0 {
actual.Group = defaultGVK.Group
actual.Version = defaultGVK.Version
}
if len(actual.Version) == 0 && actual.Group == defaultGVK.Group {
actual.Version = defaultGVK.Version
}
return actual
}
// Decode attempts to convert the provided data into YAML or JSON, extract the stored schema kind, apply the provided default gvk, and then
// load that data into an object matching the desired schema kind or the provided into.
// If into is *runtime.Unknown, the raw data will be extracted and no decoding will be performed.
// If into is not registered with the typer, then the object will be straight decoded using normal JSON/YAML unmarshalling.
// If into is provided and the original data is not fully qualified with kind/version/group, the type of the into will be used to alter the returned gvk.
// If into is nil or data's gvk different from into's gvk, it will generate a new Object with ObjectCreater.New(gvk)
// On success or most errors, the method will return the calculated schema kind.
// The gvk calculate priority will be originalData > default gvk > into
func (s *Serializer) Decode(originalData []byte, gvk *schema.GroupVersionKind, into runtime.Object) (runtime.Object, *schema.GroupVersionKind, error) {
if versioned, ok := into.(*runtime.VersionedObjects); ok {
into = versioned.Last()
obj, actual, err := s.Decode(originalData, gvk, into)
if err != nil {
return nil, actual, err
}
versioned.Objects = []runtime.Object{obj}
return versioned, actual, nil
}
data := originalData
if s.yaml {
altered, err := yaml.YAMLToJSON(data)
if err != nil {
return nil, nil, err
}
data = altered
}
actual, err := s.meta.Interpret(data)
if err != nil {
return nil, nil, err
}
if gvk != nil {
*actual = gvkWithDefaults(*actual, *gvk)
}
if unk, ok := into.(*runtime.Unknown); ok && unk != nil {
unk.Raw = originalData
unk.ContentType = runtime.ContentTypeJSON
unk.GetObjectKind().SetGroupVersionKind(*actual)
return unk, actual, nil
}
if into != nil {
_, isUnstructured := into.(runtime.Unstructured)
types, _, err := s.typer.ObjectKinds(into)
switch {
case runtime.IsNotRegisteredError(err), isUnstructured:
if err := caseSensitiveJsonIterator.Unmarshal(data, into); err != nil {
return nil, actual, err
}
return into, actual, nil
case err != nil:
return nil, actual, err
default:
*actual = gvkWithDefaults(*actual, types[0])
}
}
if len(actual.Kind) == 0 {
return nil, actual, runtime.NewMissingKindErr(string(originalData))
}
if len(actual.Version) == 0 {
return nil, actual, runtime.NewMissingVersionErr(string(originalData))
}
// use the target if necessary
obj, err := runtime.UseOrCreateObject(s.typer, s.creater, *actual, into)
if err != nil {
return nil, actual, err
}
if err := caseSensitiveJsonIterator.Unmarshal(data, obj); err != nil {
return nil, actual, err
}
return obj, actual, nil
}
// Encode serializes the provided object to the given writer.
func (s *Serializer) Encode(obj runtime.Object, w io.Writer) error {
if s.yaml {
json, err := caseSensitiveJsonIterator.Marshal(obj)
if err != nil {
return err
}
data, err := yaml.JSONToYAML(json)
if err != nil {
return err
}
_, err = w.Write(data)
return err
}
if s.pretty {
data, err := caseSensitiveJsonIterator.MarshalIndent(obj, "", " ")
if err != nil {
return err
}
_, err = w.Write(data)
return err
}
encoder := json.NewEncoder(w)
return encoder.Encode(obj)
}
// RecognizesData implements the RecognizingDecoder interface.
func (s *Serializer) RecognizesData(peek io.Reader) (ok, unknown bool, err error) {
if s.yaml {
// we could potentially look for '---'
return false, true, nil
}
_, _, ok = utilyaml.GuessJSONStream(peek, 2048)
return ok, false, nil
}
// Framer is the default JSON framing behavior, with newlines delimiting individual objects.
var Framer = jsonFramer{}
type jsonFramer struct{}
// NewFrameWriter implements stream framing for this serializer
func (jsonFramer) NewFrameWriter(w io.Writer) io.Writer {
// we can write JSON objects directly to the writer, because they are self-framing
return w
}
// NewFrameReader implements stream framing for this serializer
func (jsonFramer) NewFrameReader(r io.ReadCloser) io.ReadCloser {
// we need to extract the JSON chunks of data to pass to Decode()
return framer.NewJSONFramedReader(r)
}
// YAMLFramer is the default JSON framing behavior, with newlines delimiting individual objects.
var YAMLFramer = yamlFramer{}
type yamlFramer struct{}
// NewFrameWriter implements stream framing for this serializer
func (yamlFramer) NewFrameWriter(w io.Writer) io.Writer {
return yamlFrameWriter{w}
}
// NewFrameReader implements stream framing for this serializer
func (yamlFramer) NewFrameReader(r io.ReadCloser) io.ReadCloser {
// extract the YAML document chunks directly
return utilyaml.NewDocumentDecoder(r)
}
type yamlFrameWriter struct {
w io.Writer
}
// Write separates each document with the YAML document separator (`---` followed by line
// break). Writers must write well formed YAML documents (include a final line break).
func (w yamlFrameWriter) Write(data []byte) (n int, err error) {
if _, err := w.w.Write([]byte("---\n")); err != nil {
return 0, err
}
return w.w.Write(data)
}

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vendor/k8s.io/apimachinery/pkg/runtime/serializer/json/meta.go generated vendored Normal file
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/*
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 json
import (
"encoding/json"
"fmt"
"k8s.io/apimachinery/pkg/runtime/schema"
)
// MetaFactory is used to store and retrieve the version and kind
// information for JSON objects in a serializer.
type MetaFactory interface {
// Interpret should return the version and kind of the wire-format of
// the object.
Interpret(data []byte) (*schema.GroupVersionKind, error)
}
// DefaultMetaFactory is a default factory for versioning objects in JSON. The object
// in memory and in the default JSON serialization will use the "kind" and "apiVersion"
// fields.
var DefaultMetaFactory = SimpleMetaFactory{}
// SimpleMetaFactory provides default methods for retrieving the type and version of objects
// that are identified with an "apiVersion" and "kind" fields in their JSON
// serialization. It may be parameterized with the names of the fields in memory, or an
// optional list of base structs to search for those fields in memory.
type SimpleMetaFactory struct {
}
// Interpret will return the APIVersion and Kind of the JSON wire-format
// encoding of an object, or an error.
func (SimpleMetaFactory) Interpret(data []byte) (*schema.GroupVersionKind, error) {
findKind := struct {
// +optional
APIVersion string `json:"apiVersion,omitempty"`
// +optional
Kind string `json:"kind,omitempty"`
}{}
if err := json.Unmarshal(data, &findKind); err != nil {
return nil, fmt.Errorf("couldn't get version/kind; json parse error: %v", err)
}
gv, err := schema.ParseGroupVersion(findKind.APIVersion)
if err != nil {
return nil, err
}
return &schema.GroupVersionKind{Group: gv.Group, Version: gv.Version, Kind: findKind.Kind}, nil
}