aggregatedapiserver support openapi

Signed-off-by: carlory <baofa.fan@daocloud.io>

cmd/aggregated-apiserver/app/options/options.go

@@ -10,6 +10,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/apiserver/pkg/admission"
+	"k8s.io/apiserver/pkg/endpoints/openapi"
 	"k8s.io/apiserver/pkg/features"
 	genericapiserver "k8s.io/apiserver/pkg/server"
 	genericoptions "k8s.io/apiserver/pkg/server/options"
@@ -22,6 +23,7 @@ import (
 	clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
 	clientset "github.com/karmada-io/karmada/pkg/generated/clientset/versioned"
 	informers "github.com/karmada-io/karmada/pkg/generated/informers/externalversions"
+	generatedopenapi "github.com/karmada-io/karmada/pkg/generated/openapi"
 )
 
 const defaultEtcdPathPrefix = "/registry"
@@ -121,6 +123,8 @@ func (o *Options) Config() (*aggregatedapiserver.Config, error) {
 	}
 
 	serverConfig := genericapiserver.NewRecommendedConfig(aggregatedapiserver.Codecs)
+	serverConfig.OpenAPIConfig = genericapiserver.DefaultOpenAPIConfig(generatedopenapi.GetOpenAPIDefinitions, openapi.NewDefinitionNamer(aggregatedapiserver.Scheme))
+	serverConfig.OpenAPIConfig.Info.Title = "Karmada"
 	if err := o.RecommendedOptions.ApplyTo(serverConfig); err != nil {
 		return nil, err
 	}

hack/update-codegen.sh

@@ -114,3 +114,13 @@ informer-gen \
   --versioned-clientset-package=github.com/karmada-io/karmada/pkg/generated/clientset/versioned \
   --listers-package=github.com/karmada-io/karmada/pkg/generated/listers \
   --output-package=github.com/karmada-io/karmada/pkg/generated/informers
+
+echo "Generating with openapi-gen"
+GO111MODULE=on go install k8s.io/code-generator/cmd/openapi-gen
+openapi-gen \
+  --go-header-file hack/boilerplate/boilerplate.go.txt \
+  --input-dirs "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1" \
+  --input-dirs "k8s.io/api/core/v1,k8s.io/apimachinery/pkg/api/resource" \
+  --input-dirs "k8s.io/apimachinery/pkg/apis/meta/v1,k8s.io/apimachinery/pkg/runtime,k8s.io/apimachinery/pkg/version" \
+  --output-package "github.com/karmada-io/karmada/pkg/generated/openapi" \
+  -O zz_generated.openapi

pkg/apis/cluster/v1alpha1/doc.go

@@ -1,4 +1,5 @@
 // Package v1alpha1 is the v1alpha1 version of the API.
+// +k8s:openapi-gen=true
 // +k8s:deepcopy-gen=package,register
 // +k8s:conversion-gen=github.com/karmada-io/karmada/pkg/apis/cluster
 // +groupName=cluster.karmada.io