| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 ( |
| "fmt" |
| "net" |
| "net/http" |
| "time" |
| ) |
| |
| import ( |
| "google.golang.org/grpc" |
| "google.golang.org/grpc/keepalive" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-kubernetes/pkg/config/intercp" |
| "github.com/apache/dubbo-kubernetes/pkg/core" |
| "github.com/apache/dubbo-kubernetes/pkg/core/runtime/component" |
| ) |
| |
| var log = core.Log.WithName("intercp-server") |
| |
| const ( |
| grpcMaxConcurrentStreams = 1000000 |
| grpcKeepAliveTime = 15 * time.Second |
| ) |
| |
| type InterCpServer struct { |
| config intercp.InterCpServerConfig |
| grpcServer *grpc.Server |
| instanceId string |
| } |
| |
| var _ component.Component = &InterCpServer{} |
| |
| func New( |
| config intercp.InterCpServerConfig, |
| instanceId string, |
| ) (*InterCpServer, error) { |
| grpcOptions := []grpc.ServerOption{ |
| grpc.MaxConcurrentStreams(grpcMaxConcurrentStreams), |
| grpc.KeepaliveParams(keepalive.ServerParameters{ |
| Time: grpcKeepAliveTime, |
| Timeout: grpcKeepAliveTime, |
| }), |
| grpc.KeepaliveEnforcementPolicy(keepalive.EnforcementPolicy{ |
| MinTime: grpcKeepAliveTime, |
| PermitWithoutStream: true, |
| }), |
| } |
| |
| grpcOptions = append(grpcOptions) |
| grpcServer := grpc.NewServer(grpcOptions...) |
| |
| return &InterCpServer{ |
| config: config, |
| grpcServer: grpcServer, |
| instanceId: instanceId, |
| }, nil |
| } |
| |
| func (d *InterCpServer) Start(stop <-chan struct{}) error { |
| lis, err := net.Listen("tcp", fmt.Sprintf(":%d", d.config.Port)) |
| if err != nil { |
| return err |
| } |
| log := log.WithValues( |
| "instanceId", |
| d.instanceId, |
| ) |
| |
| errChan := make(chan error) |
| go func() { |
| defer close(errChan) |
| if err := d.grpcServer.Serve(lis); err != nil { |
| if err != http.ErrServerClosed { |
| log.Error(err, "terminated with an error") |
| errChan <- err |
| return |
| } |
| } |
| log.Info("terminated normally") |
| }() |
| log.Info("starting", "interface", "0.0.0.0", "port", d.config.Port, "tls", true) |
| |
| select { |
| case <-stop: |
| log.Info("stopping gracefully") |
| d.grpcServer.GracefulStop() |
| log.Info("stopped") |
| return nil |
| case err := <-errChan: |
| return err |
| } |
| } |
| |
| func (d *InterCpServer) NeedLeaderElection() bool { |
| return false |
| } |
| |
| func (d *InterCpServer) GrpcServer() *grpc.Server { |
| return d.grpcServer |
| } |