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server.go
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server.go
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// Copyright 2018 Envoyproxy 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 test contains test utilities
package test
import (
"context"
"fmt"
"net"
"net/http"
log "github.com/sirupsen/logrus"
"google.golang.org/grpc"
"github.com/envoyproxy/go-control-plane/envoy/api/v2"
"github.com/envoyproxy/go-control-plane/envoy/api/v2/core"
accesslog "github.com/envoyproxy/go-control-plane/envoy/service/accesslog/v2"
discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v2"
xds "github.com/envoyproxy/go-control-plane/pkg/server"
)
const (
// Hello is the echo message
Hello = "Hi, there!\n"
)
// Hasher returns node ID as an ID
type Hasher struct {
}
// ID function
func (h Hasher) ID(node *core.Node) string {
if node == nil {
return "unknown"
}
return node.Id
}
type echo struct{}
func (h echo) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/text")
if _, err := w.Write([]byte(Hello)); err != nil {
log.Error(err)
}
}
// RunHTTP opens a simple listener on the port.
func RunHTTP(ctx context.Context, upstreamPort uint) {
log.WithFields(log.Fields{"port": upstreamPort}).Info("upstream listening HTTP/1.1")
server := &http.Server{Addr: fmt.Sprintf(":%d", upstreamPort), Handler: echo{}}
go func() {
if err := server.ListenAndServe(); err != nil {
log.Error(err)
}
}()
}
// RunAccessLogServer starts an accesslog service.
func RunAccessLogServer(ctx context.Context, als *AccessLogService, port uint) {
grpcServer := grpc.NewServer()
lis, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
if err != nil {
log.WithError(err).Fatal("failed to listen")
}
accesslog.RegisterAccessLogServiceServer(grpcServer, als)
log.WithFields(log.Fields{"port": port}).Info("access log server listening")
go func() {
if err = grpcServer.Serve(lis); err != nil {
log.Error(err)
}
}()
<-ctx.Done()
grpcServer.GracefulStop()
}
const grpcMaxConcurrentStreams = 1000000
// RunManagementServer starts an xDS server at the given port.
func RunManagementServer(ctx context.Context, server xds.Server, port uint) {
// gRPC golang library sets a very small upper bound for the number gRPC/h2
// streams over a single TCP connection. If a proxy multiplexes requests over
// a single connection to the management server, then it might lead to
// availability problems.
var grpcOptions []grpc.ServerOption
grpcOptions = append(grpcOptions, grpc.MaxConcurrentStreams(grpcMaxConcurrentStreams))
grpcServer := grpc.NewServer(grpcOptions...)
lis, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
if err != nil {
log.WithError(err).Fatal("failed to listen")
}
// register services
discovery.RegisterAggregatedDiscoveryServiceServer(grpcServer, server)
v2.RegisterEndpointDiscoveryServiceServer(grpcServer, server)
v2.RegisterClusterDiscoveryServiceServer(grpcServer, server)
v2.RegisterRouteDiscoveryServiceServer(grpcServer, server)
v2.RegisterListenerDiscoveryServiceServer(grpcServer, server)
log.WithFields(log.Fields{"port": port}).Info("management server listening")
go func() {
if err = grpcServer.Serve(lis); err != nil {
log.Error(err)
}
}()
<-ctx.Done()
grpcServer.GracefulStop()
}
// RunManagementGateway starts an HTTP gateway to an xDS server.
func RunManagementGateway(ctx context.Context, srv xds.Server, port uint) {
log.WithFields(log.Fields{"port": port}).Info("gateway listening HTTP/1.1")
server := &http.Server{Addr: fmt.Sprintf(":%d", port), Handler: &xds.HTTPGateway{Server: srv}}
go func() {
if err := server.ListenAndServe(); err != nil {
log.Error(err)
}
}()
}