apiserver.go

/*
Copyright 2021 KubeCube 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 server

import (
	"context"
	"fmt"
	"net/http"
	"time"

	"github.com/kubecube-io/kubecube/pkg/clog"
	"github.com/kubecube-io/kubecube/pkg/warden/reporter"
	"github.com/kubecube-io/kubecube/pkg/warden/server/authproxy"
)

var log clog.CubeLogger

type Server struct {
	Server                 *http.Server
	JwtSecret              string
	BindAddr               string
	Port                   int
	TlsCert                string
	TlsKey                 string
	LocalClusterKubeConfig string

	ready bool
}

func (s *Server) Initialize() error {
	log = clog.WithName("authproxy")

	reporter.RegisterCheckFunc(s.readyzCheck)

	return nil
}

func (s *Server) Run(stop <-chan struct{}) {
	authProxyHandler, err := authproxy.NewHandler(s.LocalClusterKubeConfig)
	if err != nil {
		log.Fatal("new auth proxy handler failed: %v", err)
	}

	mux := http.NewServeMux()
	mux.Handle("/", authProxyHandler)

	s.Server = &http.Server{Handler: mux, Addr: fmt.Sprintf("%s:%d", s.BindAddr, s.Port)}

	go func() {
		err := s.Server.ListenAndServeTLS(s.TlsCert, s.TlsKey)
		if err != nil {
			log.Fatal("auth proxy server start err: %v", err)
		}
	}()

	log.Info("auth proxy server listen in %s:%d", s.BindAddr, s.Port)

	// mark auth proxy server ready
	s.ready = true

	<-stop

	log.Info("Shutting down auth proxy server")

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	if err := s.Server.Shutdown(ctx); err != nil {
		log.Fatal("auth proxy server forced to shutdown:", err)
	}

	log.Info("auth proxy server exiting")
}

func (s *Server) readyzCheck() bool {
	return s.ready
}