github.com/google/fleetspeak@v0.1.15-0.20240426164851-4f31f62c1aea/cmd/fleetspeak_server/fleetspeak_server.go (about)

     1  // Copyright 2018 Google Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     https://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // Package main defines an entry point for a general purpose fleetspeak server.
    16  package main
    17  
    18  import (
    19  	"context"
    20  	"flag"
    21  	"io/ioutil"
    22  	"os"
    23  	"os/signal"
    24  	"syscall"
    25  
    26  	log "github.com/golang/glog"
    27  	"google.golang.org/protobuf/encoding/prototext"
    28  
    29  	"github.com/google/fleetspeak/fleetspeak/src/server"
    30  	"github.com/google/fleetspeak/fleetspeak/src/server/components"
    31  
    32  	cpb "github.com/google/fleetspeak/fleetspeak/src/server/components/proto/fleetspeak_components"
    33  	spb "github.com/google/fleetspeak/fleetspeak/src/server/proto/fleetspeak_server"
    34  )
    35  
    36  var componentsConfigPath = flag.String("components_config", "/etc/fleetspeak-server/server.components.config", "File describing the server component configuration.")
    37  var servicesConfigPath = flag.String("services_config", "/etc/fleetspeak-server/server.services.config", "File describing the server services configuration.")
    38  
    39  func main() {
    40  	flag.Parse()
    41  
    42  	s, err := server.MakeServer(readServicesConfig(), loadComponents())
    43  	if err != nil {
    44  		log.Exitf("Unable to initialize Fleetspeak server: %v", err)
    45  	}
    46  	defer s.Stop()
    47  	log.Infof("Fleetspeak server started.")
    48  
    49  	// Wait for a sign that we should stop.
    50  	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
    51  	defer stop()
    52  	<-ctx.Done()
    53  }
    54  
    55  func loadComponents() server.Components {
    56  	b, err := ioutil.ReadFile(*componentsConfigPath)
    57  	if err != nil {
    58  		log.Exitf("Unable to read component config file [%s]: %v", *componentsConfigPath, err)
    59  	}
    60  	c := &cpb.Config{}
    61  	if err := prototext.Unmarshal(b, c); err != nil {
    62  		log.Exitf("Unable to parse component config file [%s]: %v", *componentsConfigPath, err)
    63  	}
    64  	r, err := components.MakeComponents(c)
    65  	if err != nil {
    66  		log.Exitf("Failed to load components: %v", err)
    67  	}
    68  	return *r
    69  }
    70  
    71  func readServicesConfig() *spb.ServerConfig {
    72  	cb, err := ioutil.ReadFile(*servicesConfigPath)
    73  	if err != nil {
    74  		log.Exitf("Unable to read services configuration file [%v]: %v", *servicesConfigPath, err)
    75  	}
    76  	conf := &spb.ServerConfig{}
    77  	if err := prototext.Unmarshal(cb, conf); err != nil {
    78  		log.Exitf("Unable to parse services configuration file [%v]: %v", *servicesConfigPath, err)
    79  	}
    80  	return conf
    81  }