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main.go
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package main
import (
"bytes"
"context"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"html/template"
"io/ioutil"
stdlog "log"
"net"
"net/http"
"net/http/pprof"
"net/url"
"os"
"os/signal"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"syscall"
"time"
"github.com/centrifugal/centrifugo/internal/admin"
"github.com/centrifugal/centrifugo/internal/api"
"github.com/centrifugal/centrifugo/internal/health"
"github.com/centrifugal/centrifugo/internal/jwt"
"github.com/centrifugal/centrifugo/internal/logutils"
"github.com/centrifugal/centrifugo/internal/metrics/graphite"
"github.com/centrifugal/centrifugo/internal/middleware"
"github.com/centrifugal/centrifugo/internal/proxy"
"github.com/centrifugal/centrifugo/internal/webui"
"github.com/FZambia/viper-lite"
"github.com/centrifugal/centrifuge"
"github.com/mattn/go-isatty"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
uuid "github.com/satori/go.uuid"
"github.com/spf13/cobra"
"golang.org/x/crypto/acme"
"golang.org/x/crypto/acme/autocert"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
// VERSION of Centrifugo server. Set on build stage.
var VERSION string
func main() {
var configFile string
var rootCmd = &cobra.Command{
Use: "",
Short: "Centrifugo",
Long: "Centrifugo – real-time messaging server",
Run: func(cmd *cobra.Command, args []string) {
for k, v := range configDefaults {
viper.SetDefault(k, v)
}
bindEnvs := []string{
"address", "admin", "admin_external", "admin_insecure", "admin_password",
"admin_secret", "admin_web_path", "anonymous", "api_insecure", "api_key",
"channel_max_length", "channel_namespace_boundary", "channel_private_prefix",
"channel_user_boundary", "channel_user_separator", "client_anonymous",
"client_channel_limit", "client_channel_position_check_delay",
"client_expired_close_delay", "client_expired_sub_close_delay",
"client_insecure", "client_message_write_timeout", "client_ping_interval",
"client_presence_expire_interval", "client_presence_ping_interval",
"client_queue_max_size", "client_request_max_size", "client_stale_close_delay",
"debug", "engine", "graphite", "graphite_host", "graphite_interval",
"graphite_port", "graphite_prefix", "graphite_tags", "grpc_api",
"grpc_api_port", "health", "history_lifetime", "history_recover",
"history_size", "internal_address", "internal_port", "join_leave", "log_file",
"log_level", "name", "namespaces", "node_info_metrics_aggregate_interval",
"pid_file", "port", "presence", "prometheus", "publish", "redis_connect_timeout",
"redis_db", "redis_host", "redis_idle_timeout", "redis_master_name",
"redis_password", "redis_port", "redis_prefix", "redis_pubsub_num_workers",
"redis_read_timeout", "redis_sentinels", "redis_tls", "redis_tls_skip_verify",
"redis_url", "redis_write_timeout", "secret", "shutdown_termination_delay",
"shutdown_timeout", "sockjs_heartbeat_delay", "sockjs_url", "subscribe_to_publish",
"tls", "tls_autocert", "tls_autocert_cache_dir", "tls_autocert_email",
"tls_autocert_force_rsa", "tls_autocert_host_whitelist", "tls_autocert_http",
"tls_autocert_http_addr", "tls_autocert_server_name", "tls_cert", "tls_external",
"tls_key", "websocket_compression", "websocket_compression_level",
"websocket_compression_min_size", "websocket_read_buffer_size",
"websocket_write_buffer_size", "history_disable_for_client",
"presence_disable_for_client", "admin_handler_prefix", "websocket_handler_prefix",
"sockjs_handler_prefix", "api_handler_prefix", "prometheus_handler_prefix",
"health_handler_prefix", "grpc_api_tls", "grpc_api_tls_disable",
"grpc_api_tls_cert", "grpc_api_tls_key", "proxy_connect_endpoint",
"proxy_connect_timeout", "proxy_rpc_endpoint", "proxy_rpc_timeout",
"proxy_refresh_endpoint", "proxy_refresh_timeout",
"token_rsa_public_key", "token_hmac_secret_key", "redis_sequence_ttl",
"proxy_extra_http_headers", "server_side", "user_subscribe_to_personal",
"user_personal_channel_namespace", "websocket_use_write_buffer_pool",
"websocket_disable", "sockjs_disable", "api_disable", "redis_cluster_addrs",
}
for _, env := range bindEnvs {
_ = viper.BindEnv(env)
}
bindPFlags := []string{
"engine", "log_level", "log_file", "pid_file", "debug", "name", "admin",
"admin_external", "client_insecure", "admin_insecure", "api_insecure",
"port", "address", "tls", "tls_cert", "tls_key", "tls_external", "internal_port",
"internal_address", "prometheus", "health", "redis_host", "redis_port",
"redis_password", "redis_db", "redis_url", "redis_tls", "redis_tls_skip_verify",
"redis_master_name", "redis_sentinels", "grpc_api", "grpc_api_tls",
"grpc_api_tls_disable", "grpc_api_tls_cert", "grpc_api_tls_key", "grpc_api_port",
}
for _, flag := range bindPFlags {
_ = viper.BindPFlag(flag, cmd.Flags().Lookup(flag))
}
// For backwards compatibility.
viper.RegisterAlias("websocket_ping_interval", "client_ping_interval")
viper.RegisterAlias("websocket_write_timeout", "client_message_write_timeout")
viper.RegisterAlias("websocket_message_size_limit", "client_request_max_size")
viper.SetConfigFile(configFile)
absConfPath, err := filepath.Abs(configFile)
if err != nil {
log.Fatal().Msgf("error retrieving config file absolute path: %v", err)
}
err = viper.ReadInConfig()
configFound := true
if err != nil {
switch err.(type) {
case viper.ConfigParseError:
log.Fatal().Msgf("error parsing configuration: %s\n", err)
default:
configFound = false
}
}
file := setupLogging()
if file != nil {
defer file.Close()
}
err = writePidFile(viper.GetString("pid_file"))
if err != nil {
log.Fatal().Msgf("error writing PID: %v", err)
}
if os.Getenv("GOMAXPROCS") == "" {
if viper.IsSet("gomaxprocs") && viper.GetInt("gomaxprocs") > 0 {
runtime.GOMAXPROCS(viper.GetInt("gomaxprocs"))
} else {
runtime.GOMAXPROCS(runtime.NumCPU())
}
}
c := nodeConfig(VERSION)
err = c.Validate()
if err != nil {
log.Fatal().Msgf("error validating config: %v", err)
}
node, err := centrifuge.New(*c)
if err != nil {
log.Fatal().Msgf("error creating Centrifuge Node: %v", err)
}
engineName := viper.GetString("engine")
var e centrifuge.Engine
if engineName == "memory" {
e, err = memoryEngine(node)
} else if engineName == "redis" {
e, err = redisEngine(node)
} else {
log.Fatal().Msgf("unknown engine: %s", engineName)
}
if err != nil {
log.Fatal().Msgf("error creating engine: %v", err)
}
connectHandlerEnabled := viper.GetString("proxy_connect_endpoint") != ""
if connectHandlerEnabled {
connectHandler := proxy.NewConnectHandler(proxy.ConnectHandlerConfig{
Proxy: proxy.NewHTTPConnectProxy(
viper.GetString("proxy_connect_endpoint"),
proxyHTTPClient(viper.GetFloat64("proxy_connect_timeout")),
proxy.WithExtraHeaders(viper.GetStringSlice("proxy_extra_http_headers")),
),
})
node.On().ClientConnecting(connectHandler.Handle(node))
}
refreshHandler := proxy.NewRefreshHandler(proxy.RefreshHandlerConfig{
Proxy: proxy.NewHTTPRefreshProxy(
viper.GetString("proxy_refresh_endpoint"),
proxyHTTPClient(viper.GetFloat64("proxy_refresh_timeout")),
proxy.WithExtraHeaders(viper.GetStringSlice("proxy_extra_http_headers")),
),
})
refreshHandlerEnabled := viper.GetString("proxy_refresh_endpoint") != ""
if refreshHandlerEnabled {
node.On().ClientRefresh(refreshHandler.Handle(node))
}
rpcHandler := proxy.NewRPCHandler(proxy.RPCHandlerConfig{
Proxy: proxy.NewHTTPRPCProxy(
viper.GetString("proxy_rpc_endpoint"),
proxyHTTPClient(viper.GetFloat64("proxy_rpc_timeout")),
proxy.WithExtraHeaders(viper.GetStringSlice("proxy_extra_http_headers")),
),
})
rpcHandlerEnabled := viper.GetString("proxy_rpc_endpoint") != ""
node.On().ClientConnected(func(ctx context.Context, client *centrifuge.Client) {
if rpcHandlerEnabled {
client.On().RPC(rpcHandler.Handle(ctx, node, client))
}
})
node.SetEngine(e)
if err = node.Run(); err != nil {
log.Fatal().Msgf("error running node: %v", err)
}
version := VERSION
if version == "" {
version = "dev"
}
log.Info().Str(
"version", version).Str(
"runtime", runtime.Version()).Int(
"pid", os.Getpid()).Str(
"engine", strings.Title(engineName)).Int(
"gomaxprocs", runtime.GOMAXPROCS(0)).Msg("starting Centrifugo")
log.Info().Str("path", absConfPath).Msg("using config file")
if !configFound {
log.Warn().Msg("config file not found")
}
if connectHandlerEnabled {
log.Info().Str("endpoint", viper.GetString("proxy_connect_endpoint")).Msg("proxy connect over HTTP")
}
if refreshHandlerEnabled {
log.Info().Str("endpoint", viper.GetString("proxy_refresh_endpoint")).Msg("proxy refresh over HTTP")
}
if rpcHandlerEnabled {
log.Info().Str("endpoint", viper.GetString("proxy_rpc_endpoint")).Msg("proxy RPC over HTTP")
}
if viper.GetBool("client_insecure") {
log.Warn().Msg("INSECURE client mode enabled")
}
if viper.GetBool("api_insecure") {
log.Warn().Msg("INSECURE API mode enabled")
}
if viper.GetBool("admin_insecure") {
log.Warn().Msg("INSECURE admin mode enabled")
}
if viper.GetBool("debug") {
log.Warn().Msg("DEBUG mode enabled, see /debug/pprof")
}
var grpcAPIServer *grpc.Server
var grpcAPIAddr string
if viper.GetBool("grpc_api") {
grpcAPIAddr = fmt.Sprintf(":%d", viper.GetInt("grpc_api_port"))
grpcAPIConn, err := net.Listen("tcp", grpcAPIAddr)
if err != nil {
log.Fatal().Msgf("cannot listen to address %s", grpcAPIAddr)
}
var grpcOpts []grpc.ServerOption
var tlsConfig *tls.Config
var tlsErr error
if viper.GetBool("grpc_api_tls") {
tlsConfig, tlsErr = tlsConfigForGRPC()
} else if !viper.GetBool("grpc_api_tls_disable") {
tlsConfig, tlsErr = getTLSConfig()
}
if tlsErr != nil {
log.Fatal().Msgf("error getting TLS config: %v", tlsErr)
}
if tlsConfig != nil {
grpcOpts = append(grpcOpts, grpc.Creds(credentials.NewTLS(tlsConfig)))
}
grpcAPIServer = grpc.NewServer(grpcOpts...)
_ = api.RegisterGRPCServerAPI(node, grpcAPIServer, api.GRPCAPIServiceConfig{})
go func() {
if err := grpcAPIServer.Serve(grpcAPIConn); err != nil {
log.Fatal().Msgf("serve GRPC: %v", err)
}
}()
}
if grpcAPIServer != nil {
log.Info().Msgf("serving GRPC API service on %s", grpcAPIAddr)
}
servers, err := runHTTPServers(node)
if err != nil {
log.Fatal().Msgf("error running HTTP server: %v", err)
}
var exporter *graphite.Exporter
if viper.GetBool("graphite") {
exporter = graphite.New(graphite.Config{
Address: net.JoinHostPort(viper.GetString("graphite_host"), strconv.Itoa(viper.GetInt("graphite_port"))),
Gatherer: prometheus.DefaultGatherer,
Prefix: strings.TrimSuffix(viper.GetString("graphite_prefix"), ".") + "." + graphite.PreparePathComponent(c.Name),
Interval: time.Duration(viper.GetInt("graphite_interval")) * time.Second,
Tags: viper.GetBool("graphite_tags"),
})
}
handleSignals(node, servers, grpcAPIServer, exporter)
},
}
rootCmd.Flags().StringVarP(&configFile, "config", "c", "config.json", "path to config file")
rootCmd.Flags().StringP("engine", "e", "memory", "engine to use: memory or redis")
rootCmd.Flags().StringP("log_level", "", "info", "set the log level: debug, info, error, fatal or none")
rootCmd.Flags().StringP("log_file", "", "", "optional log file - if not specified logs go to STDOUT")
rootCmd.Flags().StringP("pid_file", "", "", "optional path to create PID file")
rootCmd.Flags().StringP("name", "n", "", "unique node name")
rootCmd.Flags().BoolP("debug", "", false, "enable debug endpoints")
rootCmd.Flags().BoolP("admin", "", false, "enable admin web interface")
rootCmd.Flags().BoolP("admin_external", "", false, "enable admin web interface on external port")
rootCmd.Flags().BoolP("prometheus", "", false, "enable Prometheus metrics endpoint")
rootCmd.Flags().BoolP("health", "", false, "enable health check endpoint")
rootCmd.Flags().BoolP("client_insecure", "", false, "start in insecure client mode")
rootCmd.Flags().BoolP("api_insecure", "", false, "use insecure API mode")
rootCmd.Flags().BoolP("admin_insecure", "", false, "use insecure admin mode – no auth required for admin socket")
rootCmd.Flags().StringP("address", "a", "", "interface address to listen on")
rootCmd.Flags().StringP("port", "p", "8000", "port to bind HTTP server to")
rootCmd.Flags().StringP("internal_address", "", "", "custom interface address to listen on for internal endpoints")
rootCmd.Flags().StringP("internal_port", "", "", "custom port for internal endpoints")
rootCmd.Flags().BoolP("tls", "", false, "enable TLS, requires an X509 certificate and a key file")
rootCmd.Flags().StringP("tls_cert", "", "", "path to an X509 certificate file")
rootCmd.Flags().StringP("tls_key", "", "", "path to an X509 certificate key")
rootCmd.Flags().BoolP("tls_external", "", false, "enable TLS only for external endpoints")
rootCmd.Flags().BoolP("grpc_api", "", false, "enable GRPC API server")
rootCmd.Flags().IntP("grpc_api_port", "", 10000, "port to bind GRPC API server to")
rootCmd.Flags().BoolP("grpc_api_tls", "", false, "enable TLS for GRPC API server, requires an X509 certificate and a key file")
rootCmd.Flags().StringP("grpc_api_tls_cert", "", "", "path to an X509 certificate file for GRPC API server")
rootCmd.Flags().StringP("grpc_api_tls_key", "", "", "path to an X509 certificate key for GRPC API server")
rootCmd.Flags().BoolP("grpc_api_tls_disable", "", false, "disable general TLS for GRPC API server")
rootCmd.Flags().StringP("redis_host", "", "127.0.0.1", "Redis host (Redis engine)")
rootCmd.Flags().StringP("redis_port", "", "6379", "Redis port (Redis engine)")
rootCmd.Flags().StringP("redis_password", "", "", "Redis auth password (Redis engine)")
rootCmd.Flags().IntP("redis_db", "", 0, "Redis database (Redis engine)")
rootCmd.Flags().StringP("redis_url", "", "", "Redis connection URL in format redis://:password@hostname:port/db (Redis engine)")
rootCmd.Flags().BoolP("redis_tls", "", false, "enable Redis TLS connection")
rootCmd.Flags().BoolP("redis_tls_skip_verify", "", false, "disable Redis TLS host verification")
rootCmd.Flags().StringP("redis_master_name", "", "", "name of Redis master Sentinel monitors (Redis engine)")
rootCmd.Flags().StringP("redis_sentinels", "", "", "comma-separated list of Sentinel addresses (Redis engine)")
viper.SetEnvPrefix("centrifugo")
var versionCmd = &cobra.Command{
Use: "version",
Short: "Centrifugo version information",
Long: `Print the version information of Centrifugo`,
Run: func(cmd *cobra.Command, args []string) {
fmt.Printf("Centrifugo v%s (Go version: %s)\n", VERSION, runtime.Version())
},
}
var checkConfigFile string
var checkConfigCmd = &cobra.Command{
Use: "checkconfig",
Short: "Check configuration file",
Long: `Check Centrifugo configuration file`,
Run: func(cmd *cobra.Command, args []string) {
err := validateConfig(checkConfigFile)
if err != nil {
log.Fatal().Msgf("%v", err)
}
},
}
checkConfigCmd.Flags().StringVarP(&checkConfigFile, "config", "c", "config.json", "path to config file to check")
var outputConfigFile string
var generateConfigCmd = &cobra.Command{
Use: "genconfig",
Short: "Generate simple configuration file to start with",
Long: `Generate simple configuration file to start with`,
Run: func(cmd *cobra.Command, args []string) {
err := generateConfig(outputConfigFile)
if err != nil {
log.Fatal().Msgf("%v", err)
}
},
}
generateConfigCmd.Flags().StringVarP(&outputConfigFile, "config", "c", "config.json", "path to output config file")
rootCmd.AddCommand(versionCmd)
rootCmd.AddCommand(checkConfigCmd)
rootCmd.AddCommand(generateConfigCmd)
_ = rootCmd.Execute()
}
var configDefaults = map[string]interface{}{
"gomaxprocs": 0,
"engine": "memory",
"name": "",
"secret": "",
"token_hmac_secret_key": "",
"token_rsa_public_key": "",
"server_side": false,
"publish": false,
"subscribe_to_publish": false,
"anonymous": false,
"presence": false,
"presence_disable_for_client": false,
"history_size": 0,
"history_lifetime": 0,
"history_recover": false,
"history_disable_for_client": false,
"node_info_metrics_aggregate_interval": 60,
"client_anonymous": false,
"client_ping_interval": 25,
"client_expired_close_delay": 25,
"client_expired_sub_close_delay": 25,
"client_stale_close_delay": 25,
"client_channel_limit": 128,
"client_queue_max_size": 10485760, // 10MB
"client_presence_ping_interval": 25,
"client_presence_expire_interval": 60,
"client_user_connection_limit": 0,
"client_channel_position_check_delay": 40,
"channel_max_length": 255,
"channel_private_prefix": "$",
"channel_namespace_boundary": ":",
"channel_user_boundary": "#",
"channel_user_separator": ",",
"user_subscribe_to_personal": false,
"user_personal_channel_namespace": "",
"debug": false,
"prometheus": false,
"health": false,
"admin": false,
"admin_password": "",
"admin_secret": "",
"admin_insecure": false,
"admin_web_path": "",
"sockjs_url": "https://cdn.jsdelivr.net/npm/sockjs-client@1/dist/sockjs.min.js",
"sockjs_heartbeat_delay": 25,
"websocket_compression": false,
"websocket_compression_min_size": 0,
"websocket_compression_level": 1,
"websocket_read_buffer_size": 0,
"websocket_use_write_buffer_pool": false,
"websocket_write_buffer_size": 0,
"websocket_ping_interval": 25,
"websocket_write_timeout": 0,
"websocket_message_size_limit": 65536, // 64KB
"tls_autocert": false,
"tls_autocert_host_whitelist": "",
"tls_autocert_cache_dir": "",
"tls_autocert_email": "",
"tls_autocert_force_rsa": false,
"tls_autocert_server_name": "",
"tls_autocert_http": false,
"tls_autocert_http_addr": ":80",
"redis_prefix": "centrifugo",
"redis_connect_timeout": 1,
"redis_read_timeout": 5,
"redis_write_timeout": 1,
"redis_idle_timeout": 0,
"redis_pubsub_num_workers": 0,
"redis_sequence_ttl": 0,
"grpc_api": false,
"grpc_api_port": 10000,
"shutdown_timeout": 30,
"shutdown_termination_delay": 0,
"graphite": false,
"graphite_host": "localhost",
"graphite_port": 2003,
"graphite_prefix": "centrifugo",
"graphite_interval": 10,
"graphite_tags": false,
"websocket_disable": false,
"sockjs_disable": false,
"api_disable": false,
"admin_handler_prefix": "",
"websocket_handler_prefix": "/connection/websocket",
"sockjs_handler_prefix": "/connection/sockjs",
"api_handler_prefix": "/api",
"prometheus_handler_prefix": "/metrics",
"health_handler_prefix": "/health",
"proxy_connect_endpoint": "",
"proxy_connect_timeout": 1,
"proxy_rpc_endpoint": "",
"proxy_rpc_timeout": 1,
"proxy_refresh_endpoint": "",
"proxy_refresh_timeout": 1,
}
func writePidFile(pidFile string) error {
if pidFile == "" {
return nil
}
pid := []byte(strconv.Itoa(os.Getpid()) + "\n")
return ioutil.WriteFile(pidFile, pid, 0644)
}
var logLevelMatches = map[string]zerolog.Level{
"NONE": zerolog.NoLevel,
"DEBUG": zerolog.DebugLevel,
"INFO": zerolog.InfoLevel,
"WARN": zerolog.WarnLevel,
"ERROR": zerolog.ErrorLevel,
"FATAL": zerolog.FatalLevel,
}
func setupLogging() *os.File {
if isatty.IsTerminal(os.Stdout.Fd()) && runtime.GOOS != "windows" {
log.Logger = log.Output(zerolog.ConsoleWriter{
Out: os.Stdout,
TimeFormat: "2006-01-02 15:04:05",
FormatLevel: logutils.ConsoleFormatLevel(),
FormatErrFieldName: logutils.ConsoleFormatErrFieldName(),
FormatErrFieldValue: logutils.ConsoleFormatErrFieldValue(),
})
}
zerolog.SetGlobalLevel(zerolog.InfoLevel)
logLevel, ok := logLevelMatches[strings.ToUpper(viper.GetString("log_level"))]
if !ok {
logLevel = zerolog.InfoLevel
}
zerolog.SetGlobalLevel(logLevel)
if viper.IsSet("log_file") && viper.GetString("log_file") != "" {
f, err := os.OpenFile(viper.GetString("log_file"), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatal().Msgf("error opening log file: %v", err)
}
log.Logger = log.Output(f)
return f
}
return nil
}
func handleSignals(n *centrifuge.Node, httpServers []*http.Server, grpcAPIServer *grpc.Server, exporter *graphite.Exporter) {
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, syscall.SIGHUP, syscall.SIGINT, os.Interrupt, syscall.SIGTERM)
for {
sig := <-sigCh
log.Info().Msgf("signal received: %v", sig)
switch sig {
case syscall.SIGHUP:
// reload application configuration on SIGHUP.
log.Info().Msg("reloading configuration")
err := viper.ReadInConfig()
if err != nil {
switch err.(type) {
case viper.ConfigParseError:
log.Error().Msgf("error parsing configuration: %s", err)
continue
default:
log.Error().Msg("no config file found")
continue
}
}
cfg := nodeConfig(VERSION)
if err := n.Reload(*cfg); err != nil {
log.Error().Msgf("error reloading: %v", err)
continue
}
log.Info().Msg("configuration successfully reloaded")
case syscall.SIGINT, os.Interrupt, syscall.SIGTERM:
log.Info().Msg("shutting down ...")
pidFile := viper.GetString("pid_file")
shutdownTimeout := time.Duration(viper.GetInt("shutdown_timeout")) * time.Second
go time.AfterFunc(shutdownTimeout, func() {
if pidFile != "" {
_ = os.Remove(pidFile)
}
os.Exit(1)
})
if exporter != nil {
_ = exporter.Close()
}
var wg sync.WaitGroup
if grpcAPIServer != nil {
wg.Add(1)
go func() {
defer wg.Done()
grpcAPIServer.GracefulStop()
}()
}
ctx, _ := context.WithTimeout(context.Background(), shutdownTimeout)
for _, srv := range httpServers {
wg.Add(1)
go func(srv *http.Server) {
defer wg.Done()
_ = srv.Shutdown(ctx)
}(srv)
}
_ = n.Shutdown(ctx)
wg.Wait()
if pidFile != "" {
_ = os.Remove(pidFile)
}
time.Sleep(time.Duration(viper.GetInt("shutdown_termination_delay")) * time.Second)
os.Exit(0)
}
}
}
func proxyHTTPClient(timeout float64) *http.Client {
return &http.Client{
Transport: &http.Transport{
MaxIdleConnsPerHost: proxy.DefaultMaxIdleConnsPerHost,
},
Timeout: time.Duration(timeout*1000) * time.Millisecond,
}
}
var startHTTPChallengeServerOnce sync.Once // TODO: refactor to get rid of global here.
func getTLSConfig() (*tls.Config, error) {
tlsEnabled := viper.GetBool("tls")
tlsCert := viper.GetString("tls_cert")
tlsKey := viper.GetString("tls_key")
tlsAutocertEnabled := viper.GetBool("tls_autocert")
autocertHostWhitelist := viper.GetString("tls_autocert_host_whitelist")
var tlsAutocertHostWhitelist []string
if autocertHostWhitelist != "" {
tlsAutocertHostWhitelist = strings.Split(autocertHostWhitelist, ",")
} else {
tlsAutocertHostWhitelist = nil
}
tlsAutocertCacheDir := viper.GetString("tls_autocert_cache_dir")
tlsAutocertEmail := viper.GetString("tls_autocert_email")
tlsAutocertForceRSA := viper.GetBool("tls_autocert_force_rsa")
tlsAutocertServerName := viper.GetString("tls_autocert_server_name")
tlsAutocertHTTP := viper.GetBool("tls_autocert_http")
tlsAutocertHTTPAddr := viper.GetString("tls_autocert_http_addr")
if tlsAutocertEnabled {
certManager := autocert.Manager{
Prompt: autocert.AcceptTOS,
ForceRSA: tlsAutocertForceRSA,
Email: tlsAutocertEmail,
}
if tlsAutocertHostWhitelist != nil {
certManager.HostPolicy = autocert.HostWhitelist(tlsAutocertHostWhitelist...)
}
if tlsAutocertCacheDir != "" {
certManager.Cache = autocert.DirCache(tlsAutocertCacheDir)
}
if tlsAutocertHTTP {
startHTTPChallengeServerOnce.Do(func() {
// getTLSConfig can be called several times.
acmeHTTPserver := &http.Server{
Handler: certManager.HTTPHandler(nil),
Addr: tlsAutocertHTTPAddr,
ErrorLog: stdlog.New(&httpErrorLogWriter{log.Logger}, "", 0),
}
go func() {
log.Info().Msgf("serving ACME http_01 challenge on %s", tlsAutocertHTTPAddr)
if err := acmeHTTPserver.ListenAndServe(); err != nil {
log.Fatal().Msgf("can't create server on %s to serve acme http challenge: %v", tlsAutocertHTTPAddr, err)
}
}()
})
}
return &tls.Config{
GetCertificate: func(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
// See https://github.com/centrifugal/centrifugo/issues/144#issuecomment-279393819
if tlsAutocertServerName != "" && hello.ServerName == "" {
hello.ServerName = tlsAutocertServerName
}
return certManager.GetCertificate(hello)
},
NextProtos: []string{
"h2", "http/1.1", acme.ALPNProto,
},
}, nil
} else if tlsEnabled {
// Autocert disabled - just try to use provided SSL cert and key files.
tlsConfig := &tls.Config{}
tlsConfig = tlsConfig.Clone()
tlsConfig.Certificates = make([]tls.Certificate, 1)
var err error
tlsConfig.Certificates[0], err = tls.LoadX509KeyPair(tlsCert, tlsKey)
if err != nil {
return nil, err
}
return tlsConfig, nil
}
return nil, nil
}
func tlsConfigForGRPC() (*tls.Config, error) {
tlsCert := viper.GetString("grpc_api_tls_cert")
tlsKey := viper.GetString("grpc_api_tls_key")
tlsConfig := &tls.Config{}
tlsConfig.Certificates = make([]tls.Certificate, 1)
var err error
tlsConfig.Certificates[0], err = tls.LoadX509KeyPair(tlsCert, tlsKey)
if err != nil {
return nil, err
}
return tlsConfig, nil
}
type httpErrorLogWriter struct {
zerolog.Logger
}
func (w *httpErrorLogWriter) Write(data []byte) (int, error) {
w.Logger.Warn().Msg(strings.TrimSpace(string(data)))
return len(data), nil
}
func runHTTPServers(n *centrifuge.Node) ([]*http.Server, error) {
debug := viper.GetBool("debug")
useAdmin := viper.GetBool("admin")
usePrometheus := viper.GetBool("prometheus")
useHealth := viper.GetBool("health")
adminExternal := viper.GetBool("admin_external")
httpAddress := viper.GetString("address")
httpPort := viper.GetString("port")
httpInternalAddress := viper.GetString("internal_address")
httpInternalPort := viper.GetString("internal_port")
if httpInternalAddress == "" && httpAddress != "" {
// If custom internal address not explicitly set we try to reuse main
// address for internal endpoints too.
httpInternalAddress = httpAddress
}
if httpInternalPort == "" {
// If custom internal port not set we use default http port for
// internal endpoints too.
httpInternalPort = httpPort
}
// addrToHandlerFlags contains mapping between HTTP server address and
// handler flags to serve on this address.
addrToHandlerFlags := map[string]HandlerFlag{}
var portFlags HandlerFlag
externalAddr := net.JoinHostPort(httpAddress, httpPort)
portFlags = addrToHandlerFlags[externalAddr]
if !viper.GetBool("websocket_disable") {
portFlags |= HandlerWebsocket
}
if !viper.GetBool("sockjs_disable") {
portFlags |= HandlerSockJS
}
if useAdmin && adminExternal {
portFlags |= HandlerAdmin
}
addrToHandlerFlags[externalAddr] = portFlags
internalAddr := net.JoinHostPort(httpInternalAddress, httpInternalPort)
portFlags = addrToHandlerFlags[internalAddr]
if !viper.GetBool("api_disable") {
portFlags |= HandlerAPI
}
if useAdmin && !adminExternal {
portFlags |= HandlerAdmin
}
if usePrometheus {
portFlags |= HandlerPrometheus
}
if debug {
portFlags |= HandlerDebug
}
if useHealth {
portFlags |= HandlerHealth
}
addrToHandlerFlags[internalAddr] = portFlags
var servers []*http.Server
tlsConfig, err := getTLSConfig()
if err != nil {
log.Fatal().Msgf("can not get TLS config: %v", err)
}
// Iterate over port to flags mapping and start HTTP servers
// on separate ports serving handlers specified in flags.
for addr, handlerFlags := range addrToHandlerFlags {
if handlerFlags == 0 {
continue
}
mux := Mux(n, handlerFlags)
log.Info().Msgf("serving %s endpoints on %s", handlerFlags, addr)
var addrTLSConfig *tls.Config
if !viper.GetBool("tls_external") || addr == externalAddr {
addrTLSConfig = tlsConfig
}
server := &http.Server{
Addr: addr,
Handler: mux,
TLSConfig: addrTLSConfig,
ErrorLog: stdlog.New(&httpErrorLogWriter{log.Logger}, "", 0),
}
servers = append(servers, server)
go func() {
if addrTLSConfig != nil {
if err := server.ListenAndServeTLS("", ""); err != nil {
if err != http.ErrServerClosed {
log.Fatal().Msgf("ListenAndServe: %v", err)
}
}
} else {
if err := server.ListenAndServe(); err != nil {
if err != http.ErrServerClosed {
log.Fatal().Msgf("ListenAndServe: %v", err)
}
}
}
}()
}
return servers, nil
}
// pathExists returns whether the given file or directory exists or not
func pathExists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil {
return true, nil
}
if os.IsNotExist(err) {
return false, nil
}
return false, err
}
var jsonConfigTemplate = `{
"token_hmac_secret_key": "{{.TokenSecret}}",
"admin_password": "{{.AdminPassword}}",
"admin_secret": "{{.AdminSecret}}",
"api_key": "{{.APIKey}}"
}
`
var tomlConfigTemplate = `token_hmac_secret_key = {{.TokenSecret}}
admin_password = {{.AdminPassword}}
admin_secret = {{.AdminSecret}}
api_key = {{.APIKey}}
`
var yamlConfigTemplate = `token_hmac_secret_key: {{.TokenSecret}}
admin_password: {{.AdminPassword}}
admin_secret: {{.AdminSecret}}
api_key: {{.APIKey}}
`
// generateConfig generates configuration file at provided path.
func generateConfig(f string) error {
exists, err := pathExists(f)
if err != nil {
return err
}
if exists {
return errors.New("output config file already exists: " + f)
}
ext := filepath.Ext(f)
if len(ext) > 1 {
ext = ext[1:]
}
supportedExts := []string{"json", "toml", "yaml", "yml"}
if !stringInSlice(ext, supportedExts) {
return errors.New("output config file must have one of supported extensions: " + strings.Join(supportedExts, ", "))
}
var t *template.Template
switch ext {
case "json":
t, err = template.New("config").Parse(jsonConfigTemplate)
case "toml":
t, err = template.New("config").Parse(tomlConfigTemplate)
case "yaml", "yml":
t, err = template.New("config").Parse(yamlConfigTemplate)
}
if err != nil {
return err
}
var output bytes.Buffer
_ = t.Execute(&output, struct {
TokenSecret string
AdminPassword string
AdminSecret string
APIKey string
}{
uuid.NewV4().String(),
uuid.NewV4().String(),
uuid.NewV4().String(),
uuid.NewV4().String(),
})
err = ioutil.WriteFile(f, output.Bytes(), 0644)
if err != nil {
return err
}
err = validateConfig(f)
if err != nil {
_ = os.Remove(f)
return err
}
return nil
}
// validateConfig validates config file located at provided path.
func validateConfig(f string) error {
viper.SetConfigFile(f)
err := viper.ReadInConfig()
if err != nil {
switch err.(type) {
case viper.ConfigParseError:
return err
default:
return errors.New("unable to locate config file, use \"centrifugo genconfig -c " + f + "\" command to generate one")
}
}
c := nodeConfig(VERSION)
return c.Validate()
}
func stringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
func nodeConfig(version string) *centrifuge.Config {
v := viper.GetViper()
cfg := ¢rifuge.Config{}
cfg.Version = version
cfg.Name = applicationName()
hmacSecretKey := v.GetString("token_hmac_secret_key")
if hmacSecretKey != "" {
cfg.TokenHMACSecretKey = hmacSecretKey
} else {
if v.GetString("secret") != "" {
log.Warn().Msg("secret is deprecated, use token_hmac_secret_key instead")
}