apiserver.go

// Copyright 2018 The Gardener 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 apiserver

import (
	"k8s.io/apimachinery/pkg/version"
	genericapiserver "k8s.io/apiserver/pkg/server"

	gardenrest "github.com/gardener/gardener/pkg/registry/garden/rest"
)

type ExtraConfig struct {
	// Place you custom config here.
}

type Config struct {
	GenericConfig *genericapiserver.RecommendedConfig
	ExtraConfig   ExtraConfig
}

// GardenServer contains state for a Garden API server.
type GardenServer struct {
	GenericAPIServer *genericapiserver.GenericAPIServer
}

type completedConfig struct {
	GenericConfig genericapiserver.CompletedConfig
	ExtraConfig   *ExtraConfig
}

type CompletedConfig struct {
	*completedConfig
}

// Complete fills in any fields not set that are required to have valid data. It's mutating the receiver.
func (cfg *Config) Complete() CompletedConfig {
	c := completedConfig{
		cfg.GenericConfig.Complete(),
		&cfg.ExtraConfig,
	}

	c.GenericConfig.Version = &version.Info{
		Major: "1",
		Minor: "0",
	}

	return CompletedConfig{&c}
}

// New returns a new instance of GardenServer from the given config.
func (c completedConfig) New() (*GardenServer, error) {
	genericServer, err := c.GenericConfig.New("garden-apiserver", genericapiserver.EmptyDelegate)
	if err != nil {
		return nil, err
	}
	s := &GardenServer{
		GenericAPIServer: genericServer,
	}

	gardenStorageProvider := gardenrest.StorageProvider{}
	apiGroupInfo := gardenStorageProvider.NewRESTStorage(c.GenericConfig.RESTOptionsGetter)
	if err := s.GenericAPIServer.InstallAPIGroup(&apiGroupInfo); err != nil {
		return nil, err
	}

	return s, nil
}