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main.go
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main.go
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// Copyright 2018 The Nakama 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
//
// https://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 main
import (
"context"
cryptoRand "crypto/rand"
"encoding/binary"
"flag"
"fmt"
"math/rand"
"net/http"
"net/url"
"os"
"os/signal"
"path/filepath"
"runtime"
"strings"
"syscall"
"time"
"github.com/gofrs/uuid"
"github.com/heroiclabs/nakama/v3/console"
"github.com/heroiclabs/nakama/v3/ga"
"github.com/heroiclabs/nakama/v3/migrate"
"github.com/heroiclabs/nakama/v3/server"
"github.com/heroiclabs/nakama/v3/social"
_ "github.com/jackc/pgx/v4/stdlib"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"google.golang.org/protobuf/encoding/protojson"
)
const cookieFilename = ".cookie"
var (
version string = "3.0.0"
commitID string = "dev"
// Shared utility components.
jsonpbMarshaler = &protojson.MarshalOptions{
UseEnumNumbers: true,
EmitUnpopulated: false,
Indent: "",
UseProtoNames: true,
}
jsonpbUnmarshaler = &protojson.UnmarshalOptions{
DiscardUnknown: false,
}
)
func main() {
semver := fmt.Sprintf("%s+%s", version, commitID)
// Always set default timeout on HTTP client.
http.DefaultClient.Timeout = 1500 * time.Millisecond
tmpLogger := server.NewJSONLogger(os.Stdout, zapcore.InfoLevel, server.JSONFormat)
if len(os.Args) > 1 {
switch os.Args[1] {
case "--version":
fmt.Println(semver)
return
case "migrate":
migrate.Parse(os.Args[2:], tmpLogger)
return
case "check":
// Parse any command line args to look up runtime path.
// Use full config structure even if not all of its options are available in this command.
config := server.NewConfig(tmpLogger)
var runtimePath string
flags := flag.NewFlagSet("check", flag.ExitOnError)
flags.StringVar(&runtimePath, "runtime.path", filepath.Join(config.GetDataDir(), "modules"), "Path for the server to scan for Lua and Go library files.")
if err := flags.Parse(os.Args[2:]); err != nil {
tmpLogger.Fatal("Could not parse check flags.")
}
config.GetRuntime().Path = runtimePath
if err := server.CheckRuntime(tmpLogger, config, version); err != nil {
// Errors are already logged in the function above.
os.Exit(1)
}
return
}
}
config := server.ParseArgs(tmpLogger, os.Args)
logger, startupLogger := server.SetupLogging(tmpLogger, config)
configWarnings := server.CheckConfig(logger, config)
startupLogger.Info("Nakama starting")
startupLogger.Info("Node", zap.String("name", config.GetName()), zap.String("version", semver), zap.String("runtime", runtime.Version()), zap.Int("cpu", runtime.NumCPU()), zap.Int("proc", runtime.GOMAXPROCS(0)))
startupLogger.Info("Data directory", zap.String("path", config.GetDataDir()))
// Initialize the global random with strongly seed.
var seed int64
if err := binary.Read(cryptoRand.Reader, binary.BigEndian, &seed); err != nil {
startupLogger.Warn("Failed to get strongly random seed, fallback to a less random one.", zap.Error(err))
seed = time.Now().UnixNano()
}
rand.Seed(seed)
redactedAddresses := make([]string, 0, 1)
for _, address := range config.GetDatabase().Addresses {
rawURL := fmt.Sprintf("postgres:https://%s", address)
parsedURL, err := url.Parse(rawURL)
if err != nil {
logger.Fatal("Bad connection URL", zap.Error(err))
}
redactedAddresses = append(redactedAddresses, strings.TrimPrefix(parsedURL.Redacted(), "postgres:https://"))
}
startupLogger.Info("Database connections", zap.Strings("dsns", redactedAddresses))
// Global server context.
ctx, ctxCancelFn := context.WithCancel(context.Background())
db, dbVersion := server.DbConnect(ctx, startupLogger, config)
startupLogger.Info("Database information", zap.String("version", dbVersion))
// Check migration status and fail fast if the schema has diverged.
migrate.StartupCheck(startupLogger, db)
// Access to social provider integrations.
socialClient := social.NewClient(logger, 5*time.Second)
// Start up server components.
cookie := newOrLoadCookie(config)
metrics := server.NewLocalMetrics(logger, startupLogger, db, config)
sessionRegistry := server.NewLocalSessionRegistry(metrics)
sessionCache := server.NewLocalSessionCache(config.GetSession().TokenExpirySec)
consoleSessionCache := server.NewLocalSessionCache(config.GetConsole().TokenExpirySec)
loginAttemptCache := server.NewLocalLoginAttemptCache()
statusRegistry := server.NewStatusRegistry(logger, config, sessionRegistry, jsonpbMarshaler)
tracker := server.StartLocalTracker(logger, config, sessionRegistry, statusRegistry, metrics, jsonpbMarshaler)
router := server.NewLocalMessageRouter(sessionRegistry, tracker, jsonpbMarshaler)
leaderboardCache := server.NewLocalLeaderboardCache(logger, startupLogger, db)
leaderboardRankCache := server.NewLocalLeaderboardRankCache(ctx, startupLogger, db, config.GetLeaderboard(), leaderboardCache)
leaderboardScheduler := server.NewLocalLeaderboardScheduler(logger, db, config, leaderboardCache, leaderboardRankCache)
googleRefundScheduler := server.NewGoogleRefundScheduler(logger, db, config)
matchRegistry := server.NewLocalMatchRegistry(logger, startupLogger, config, sessionRegistry, tracker, router, metrics, config.GetName())
tracker.SetMatchJoinListener(matchRegistry.Join)
tracker.SetMatchLeaveListener(matchRegistry.Leave)
streamManager := server.NewLocalStreamManager(config, sessionRegistry, tracker)
runtime, runtimeInfo, err := server.NewRuntime(ctx, logger, startupLogger, db, jsonpbMarshaler, jsonpbUnmarshaler, config, version, socialClient, leaderboardCache, leaderboardRankCache, leaderboardScheduler, sessionRegistry, sessionCache, statusRegistry, matchRegistry, tracker, metrics, streamManager, router)
if err != nil {
startupLogger.Fatal("Failed initializing runtime modules", zap.Error(err))
}
matchmaker := server.NewLocalMatchmaker(logger, startupLogger, config, router, metrics, runtime)
partyRegistry := server.NewLocalPartyRegistry(logger, matchmaker, tracker, streamManager, router, config.GetName())
tracker.SetPartyJoinListener(partyRegistry.Join)
tracker.SetPartyLeaveListener(partyRegistry.Leave)
leaderboardScheduler.Start(runtime)
googleRefundScheduler.Start(runtime)
pipeline := server.NewPipeline(logger, config, db, jsonpbMarshaler, jsonpbUnmarshaler, sessionRegistry, statusRegistry, matchRegistry, partyRegistry, matchmaker, tracker, router, runtime)
statusHandler := server.NewLocalStatusHandler(logger, sessionRegistry, matchRegistry, tracker, metrics, config.GetName())
apiServer := server.StartApiServer(logger, startupLogger, db, jsonpbMarshaler, jsonpbUnmarshaler, config, version, socialClient, leaderboardCache, leaderboardRankCache, sessionRegistry, sessionCache, statusRegistry, matchRegistry, matchmaker, tracker, router, streamManager, metrics, pipeline, runtime)
consoleServer := server.StartConsoleServer(logger, startupLogger, db, config, tracker, router, streamManager, metrics, sessionRegistry, sessionCache, consoleSessionCache, loginAttemptCache, statusRegistry, statusHandler, runtimeInfo, matchRegistry, configWarnings, semver, leaderboardCache, leaderboardRankCache, leaderboardScheduler, apiServer, runtime, cookie)
gaenabled := len(os.Getenv("NAKAMA_TELEMETRY")) < 1
console.UIFS.Nt = !gaenabled
const gacode = "UA-89792135-1"
var telemetryClient *http.Client
if gaenabled {
telemetryClient = &http.Client{
Timeout: 1500 * time.Millisecond,
}
runTelemetry(telemetryClient, gacode, cookie)
}
// Respect OS stop signals.
c := make(chan os.Signal, 2)
signal.Notify(c, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
startupLogger.Info("Startup done")
// Wait for a termination signal.
<-c
graceSeconds := config.GetShutdownGraceSec()
// If a shutdown grace period is allowed, prepare a timer.
var timer *time.Timer
timerCh := make(<-chan time.Time, 1)
if graceSeconds != 0 {
timer = time.NewTimer(time.Duration(graceSeconds) * time.Second)
timerCh = timer.C
startupLogger.Info("Shutdown started - use CTRL^C to force stop server", zap.Int("grace_period_sec", graceSeconds))
} else {
// No grace period.
startupLogger.Info("Shutdown started")
}
// Stop any running authoritative matches and do not accept any new ones.
select {
case <-matchRegistry.Stop(graceSeconds):
// Graceful shutdown has completed.
startupLogger.Info("All authoritative matches stopped")
case <-timerCh:
// Timer has expired, terminate matches immediately.
startupLogger.Info("Shutdown grace period expired")
<-matchRegistry.Stop(0)
case <-c:
// A second interrupt has been received.
startupLogger.Info("Skipping graceful shutdown")
<-matchRegistry.Stop(0)
}
if timer != nil {
timer.Stop()
}
// Signal cancellation to the global runtime context.
ctxCancelFn()
// Gracefully stop remaining server components.
apiServer.Stop()
consoleServer.Stop()
matchmaker.Stop()
leaderboardScheduler.Stop()
googleRefundScheduler.Stop()
tracker.Stop()
statusRegistry.Stop()
sessionCache.Stop()
sessionRegistry.Stop()
metrics.Stop(logger)
loginAttemptCache.Stop()
if gaenabled {
_ = ga.SendSessionStop(telemetryClient, gacode, cookie)
}
startupLogger.Info("Shutdown complete")
os.Exit(0)
}
// Help improve Nakama by sending anonymous usage statistics.
//
// You can disable the telemetry completely before server start by setting the
// environment variable "NAKAMA_TELEMETRY" - i.e. NAKAMA_TELEMETRY=0 nakama
//
// These properties are collected:
// * A unique UUID v4 random identifier which is generated.
// * Version of Nakama being used which includes build metadata.
// * Amount of time the server ran for.
//
// This information is sent via Google Analytics which allows the Nakama team to
// analyze usage patterns and errors in order to help improve the server.
func runTelemetry(httpc *http.Client, gacode string, cookie string) {
if ga.SendSessionStart(httpc, gacode, cookie) != nil {
return
}
if ga.SendEvent(httpc, gacode, cookie, &ga.Event{Ec: "version", Ea: fmt.Sprintf("%s+%s", version, commitID)}) != nil {
return
}
_ = ga.SendEvent(httpc, gacode, cookie, &ga.Event{Ec: "variant", Ea: "nakama"})
}
func newOrLoadCookie(config server.Config) string {
filePath := filepath.FromSlash(config.GetDataDir() + "/" + cookieFilename)
b, err := os.ReadFile(filePath)
cookie := uuid.FromBytesOrNil(b)
if err != nil || cookie == uuid.Nil {
cookie = uuid.Must(uuid.NewV4())
_ = os.WriteFile(filePath, cookie.Bytes(), 0644)
}
return cookie.String()
}