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server.go
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server.go
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/*
* Copyright (c) 2017, The Easegress Authors
* All rights reserved.
*
* 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 api
import (
"context"
"crypto/tls"
"crypto/x509"
"net/http"
"os"
"sync"
"time"
"github.com/megaease/easegress/v2/pkg/cluster"
"github.com/megaease/easegress/v2/pkg/cluster/customdata"
"github.com/megaease/easegress/v2/pkg/logger"
"github.com/megaease/easegress/v2/pkg/option"
pprof "github.com/megaease/easegress/v2/pkg/profile"
"github.com/megaease/easegress/v2/pkg/supervisor"
)
type (
// Server is the api server.
Server struct {
opt *option.Options
server http.Server
router *dynamicMux
cluster cluster.Cluster
super *supervisor.Supervisor
cds *customdata.Store
profile pprof.Profile
mutex cluster.Mutex
mutexMutex sync.Mutex
}
// Group is the API group
Group struct {
Group string
Entries []*Entry
}
// Entry is the entry of API.
Entry struct {
Path string `json:"path"`
Method string `json:"method"`
Handler http.HandlerFunc `json:"-"`
}
)
// MustNewServer creates an api server.
func MustNewServer(opt *option.Options, cls cluster.Cluster, super *supervisor.Supervisor, profile pprof.Profile) *Server {
s := &Server{
opt: opt,
cluster: cls,
super: super,
profile: profile,
}
s.router = newDynamicMux(s)
s.server = http.Server{Addr: opt.APIAddr, Handler: s.router}
if opt.ClientCAFile != "" {
caCert, err := os.ReadFile(opt.ClientCAFile)
if err != nil {
logger.Errorf("read client CA file %s failed: %v", opt.ClientCAFile, err)
}
caCertPool := x509.NewCertPool()
if ok := caCertPool.AppendCertsFromPEM(caCert); !ok {
logger.Errorf("Failed to append CA certificate to pool")
}
s.server.TLSConfig = &tls.Config{
ClientAuth: tls.RequireAndVerifyClientCert,
ClientCAs: caCertPool,
}
}
_, err := s.getMutex()
if err != nil {
logger.Errorf("get cluster mutex %s failed: %v", lockKey, err)
}
kindPrefix := cls.Layout().CustomDataKindPrefix()
dataPrefix := cls.Layout().CustomDataPrefix()
s.cds = customdata.NewStore(cls, kindPrefix, dataPrefix)
s.registerAPIs()
go func() {
var err error
if s.opt.TLS {
logger.Infof("api server (https) running in %s", opt.APIAddr)
err = s.server.ListenAndServeTLS(s.opt.CertFile, s.opt.KeyFile)
} else {
logger.Infof("api server running in %s", opt.APIAddr)
err = s.server.ListenAndServe()
}
if err != nil && err != http.ErrServerClosed {
logger.Errorf("start api server failed: %v", err)
}
}()
return s
}
// Close closes Server.
func (s *Server) Close(wg *sync.WaitGroup) {
defer wg.Done()
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
if err := s.server.Shutdown(ctx); err != nil {
logger.Errorf("gracefully shutdown the server failed: %v", err)
}
s.router.close()
logger.Infof("server stopped")
}
func (s *Server) getMutex() (cluster.Mutex, error) {
s.mutexMutex.Lock()
defer s.mutexMutex.Unlock()
if s.mutex != nil {
return s.mutex, nil
}
mutex, err := s.cluster.Mutex(lockKey)
if err != nil {
return nil, err
}
s.mutex = mutex
return s.mutex, nil
}
// Lock locks cluster operations.
func (s *Server) Lock() {
mutex, err := s.getMutex()
if err != nil {
ClusterPanic(err)
}
err = mutex.Lock()
if err != nil {
ClusterPanic(err)
}
}
// Unlock unlocks cluster operations.
func (s *Server) Unlock() {
mutex, err := s.getMutex()
if err != nil {
ClusterPanic(err)
}
err = mutex.Unlock()
if err != nil {
ClusterPanic(err)
}
}