From 4039432ac3e3439f74f4de81bfe67df3c7393b8b Mon Sep 17 00:00:00 2001 From: Marc Nuri Date: Mon, 8 Jul 2024 09:16:21 +0200 Subject: [PATCH] feat: Kubernetes types to OpenAPI generator Will be required by the future generator to generate types that aren't directly exposed from the Kubernetes API server such as WebHooks, KubeConfig, and so on. Signed-off-by: Marc Nuri --- .gitignore | 1 + Makefile | 5 + .../openapi/generator/README.md | 23 +++ .../openapi/generator/go.mod | 35 ++++ .../openapi/generator/go.sum | 130 +++++++++++++ .../openapi/generator/main.go | 179 ++++++++++++++++++ 6 files changed, 373 insertions(+) create mode 100644 kubernetes-model-generator/openapi/generator/README.md create mode 100644 kubernetes-model-generator/openapi/generator/go.mod create mode 100644 kubernetes-model-generator/openapi/generator/go.sum create mode 100644 kubernetes-model-generator/openapi/generator/main.go diff --git a/.gitignore b/.gitignore index 14e8748ee4e..3544ff580b7 100644 --- a/.gitignore +++ b/.gitignore @@ -82,6 +82,7 @@ crashlytics.properties crashlytics-build.properties # Ignore generator binary output file +kubernetes-model-generator/openapi/generator/generator kubernetes-model-generator/*/generate extensions/*/generator/generate diff --git a/Makefile b/Makefile index 301c3957ca0..325bf0b816f 100644 --- a/Makefile +++ b/Makefile @@ -23,6 +23,11 @@ clean-java: .PHONY: clean clean: clean-java +.PHONY: generate-openapi +generate-openapi: + cd kubernetes-model-generator/openapi/generator && go build + cd kubernetes-model-generator/openapi/generator && ./generator + .PHONY: generate-model generate-model: cd kubernetes-model-generator && ./generateModel.sh diff --git a/kubernetes-model-generator/openapi/generator/README.md b/kubernetes-model-generator/openapi/generator/README.md new file mode 100644 index 00000000000..6a7c17e5628 --- /dev/null +++ b/kubernetes-model-generator/openapi/generator/README.md @@ -0,0 +1,23 @@ +# Go OpenAPI generator + +Generates OpenAPI 3.0 specification from Go code. + +Intended for those types that have incomplete custom resource definition (CRD) files and types that are not exposed by the Kubernetes API server. + +## Generated Schemas + +| Schema | Description | +|------------------------|---------------------------------------------------------------------| +| kubernetes-config | Types used in the Kuberenetes configuration file ( `.kube/config` ) | +| admission-registration | Additional types required for the admission registration API | + + +## Usage + +```shell +./generator $pathToTargetDirectory +``` + +## Additional notes and resources + +- [OpenAPI definition for AdmissionReview](https://github.com/kubernetes/kubernetes/issues/84081) diff --git a/kubernetes-model-generator/openapi/generator/go.mod b/kubernetes-model-generator/openapi/generator/go.mod new file mode 100644 index 00000000000..970516e24fc --- /dev/null +++ b/kubernetes-model-generator/openapi/generator/go.mod @@ -0,0 +1,35 @@ +module github.com/fabric8io/kubernetes-client/kubernetes-model-generator/openapi/generator + +go 1.22.0 + +require ( + github.com/getkin/kin-openapi v0.125.0 + k8s.io/api v0.30.2 + k8s.io/apimachinery v0.30.2 + k8s.io/client-go v0.30.2 +) + +require ( + github.com/go-logr/logr v1.4.1 // indirect + github.com/go-openapi/jsonpointer v0.20.2 // indirect + github.com/go-openapi/swag v0.22.8 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/google/gofuzz v1.2.0 // indirect + github.com/invopop/yaml v0.2.0 // indirect + github.com/josharian/intern v1.0.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/mailru/easyjson v0.7.7 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect + github.com/perimeterx/marshmallow v1.1.5 // indirect + golang.org/x/net v0.23.0 // indirect + golang.org/x/text v0.14.0 // indirect + gopkg.in/inf.v0 v0.9.1 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect + k8s.io/klog/v2 v2.120.1 // indirect + k8s.io/utils v0.0.0-20230726121419-3b25d923346b // indirect + sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect + sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect +) diff --git a/kubernetes-model-generator/openapi/generator/go.sum b/kubernetes-model-generator/openapi/generator/go.sum new file mode 100644 index 00000000000..2b7422267be --- /dev/null +++ b/kubernetes-model-generator/openapi/generator/go.sum @@ -0,0 +1,130 @@ +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/emicklei/go-restful/v3 v3.11.0 h1:rAQeMHw1c7zTmncogyy8VvRZwtkmkZ4FxERmMY4rD+g= +github.com/emicklei/go-restful/v3 v3.11.0/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc= +github.com/getkin/kin-openapi v0.125.0 h1:jyQCyf2qXS1qvs2U00xQzkGCqYPhEhZDmSmVt65fXno= +github.com/getkin/kin-openapi v0.125.0/go.mod h1:wb1aSZA/iWmorQP9KTAS/phLj/t17B5jT7+fS8ed9NM= +github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ= 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v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0= +sigs.k8s.io/structured-merge-diff/v4 v4.4.1 h1:150L+0vs/8DA78h1u02ooW1/fFq/Lwr+sGiqlzvrtq4= +sigs.k8s.io/structured-merge-diff/v4 v4.4.1/go.mod h1:N8hJocpFajUSSeSJ9bOZ77VzejKZaXsTtZo4/u7Io08= +sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo= +sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8= diff --git a/kubernetes-model-generator/openapi/generator/main.go b/kubernetes-model-generator/openapi/generator/main.go new file mode 100644 index 00000000000..a2afacd4de5 --- /dev/null +++ b/kubernetes-model-generator/openapi/generator/main.go @@ -0,0 +1,179 @@ +/** + * Copyright (C) 2015 Red Hat, Inc. + * + * 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 main + +import ( + "github.com/getkin/kin-openapi/openapi3" + v1admission "k8s.io/api/admission/v1" + v1beta1admission "k8s.io/api/admission/v1beta1" + configapi "k8s.io/client-go/tools/clientcmd/api/v1" + "os" + "path/filepath" + "reflect" + "strings" +) + +type Schemas struct { + Types []reflect.Type + Name string +} + +func main() { + var targetDirectory string + if len(os.Args) > 1 { + targetDirectory = os.Args[1] + } else { + targetDirectory = "." + } + err := os.MkdirAll(targetDirectory, 0755) + if err != nil { + panic(err) + } + schemas := []Schemas{ + {[]reflect.Type{reflect.TypeOf(configapi.Config{})}, "kubernetes-config"}, + {[]reflect.Type{ + reflect.TypeOf(v1admission.AdmissionRequest{}), + reflect.TypeOf(v1beta1admission.AdmissionRequest{}), + }, "admission-registration"}, + //{[]reflect.Type{ + // reflect.TypeOf(metav1.GroupKind{}), + // reflect.TypeOf(metav1.GroupVersionKind{}), + // reflect.TypeOf(metav1.GroupVersionResource{}), + //}, "api-machinery-extra"}, + } + generate(schemas, targetDirectory) +} + +func generate(schemas []Schemas, targetDirectory string) { + for _, schema := range schemas { + swagger := &openapi3.T{ + OpenAPI: "3.0.0", + Info: &openapi3.Info{ + Title: schema.Name, + Version: "0.0.0", + }, + Components: &openapi3.Components{ + Schemas: extractSchemas(schema.Types), + }, + Paths: &openapi3.Paths{}, + } + json, err := swagger.MarshalJSON() + if err != nil { + panic(err) + } + err = os.WriteFile(filepath.Join(targetDirectory, schema.Name+".json"), json, 0644) + if err != nil { + panic(err) + } + } +} + +func extractSchemas(types []reflect.Type) openapi3.Schemas { + schemas := make(openapi3.Schemas) + for _, t := range types { + generateType(schemas, t) + } + return schemas +} + +func generateType(schemas openapi3.Schemas, t reflect.Type) { + if t.Kind() != reflect.Struct { + return + } + value := &openapi3.SchemaRef{Value: openapi3.NewObjectSchema()} + value.Value.Properties = make(map[string]*openapi3.SchemaRef) + for it := 0; it < t.NumField(); it++ { + field := t.Field(it) + fieldName := field.Tag.Get("json") + if strings.Index(fieldName, ",") > 0 { + fieldName = strings.Split(fieldName, ",")[0] + } + value.Value.Properties[fieldName] = openApiKind(field.Type) + + // Recurse to generate the schema for the subtypes + switch field.Type.Kind() { + case reflect.Struct: + generateType(schemas, field.Type) + case reflect.Ptr, reflect.Array, reflect.Slice: + generateType(schemas, field.Type.Elem()) + } + } + schemas[getKey(t)] = value +} + +func openApiKind(t reflect.Type) *openapi3.SchemaRef { + switch t.Kind() { + case reflect.Ptr: + return openApiKind(t.Elem()) + case reflect.Struct: + return &openapi3.SchemaRef{ + Ref: "#/components/schemas/" + getKey(t), + } + case reflect.String: + return &openapi3.SchemaRef{ + Value: openapi3.NewStringSchema(), + } + case reflect.Bool: + return &openapi3.SchemaRef{ + Value: openapi3.NewBoolSchema(), + } + case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32: + return &openapi3.SchemaRef{ + Value: openapi3.NewIntegerSchema(), + } + case reflect.Array, reflect.Slice: + // Byte-arrays as String (Fabric8) + if t.Elem().Kind() == reflect.Uint8 { + return &openapi3.SchemaRef{ + Value: openapi3.NewStringSchema(), + } + } + return &openapi3.SchemaRef{ + Value: &openapi3.Schema{ + Type: &openapi3.Types{openapi3.TypeArray}, + Items: openApiKind(t.Elem()), + }, + } + case reflect.Map: + return &openapi3.SchemaRef{ + Value: &openapi3.Schema{ + Type: &openapi3.Types{openapi3.TypeObject}, + AdditionalProperties: openapi3.AdditionalProperties{ + Schema: openApiKind(t.Elem()), + }, + }, + } + default: + println("unhandled default case " + t.Kind().String()) + return &openapi3.SchemaRef{ + Value: openapi3.NewStringSchema(), + } + } +} + +func getKey(t reflect.Type) string { + pkg := "" + for _, segment := range strings.Split(t.PkgPath(), "/") { + domainParts := strings.Split(segment, ".") + for i := len(domainParts) - 1; i >= 0; i-- { + if len(pkg) > 0 { + pkg += "." + } + pkg += domainParts[i] + } + } + return pkg + "." + t.Name() +}