[#71] Validate config for unknown keys

Signed-off-by: Denis Kirillov <denis@nspcc.ru>

cmd/neofs-rest-gw/config.go

@@ -44,6 +44,9 @@ const (
 	cfgPoolErrorThreshold = "pool.error-threshold"
 	cmdPeers              = "peers"
 	cfgPeers              = "pool." + cmdPeers
+	cfgPeerAddress        = "address"
+	cfgPeerPriority       = "priority"
+	cfgPeerWeight         = "weight"
 
 	// Metrics / Profiler.
 	cfgPrometheusEnabled = "prometheus.enabled"
@@ -59,6 +62,9 @@ const (
 	cfgWalletAddress    = "wallet.address"
 	cfgWalletPassphrase = "wallet.passphrase"
 
+	// Config section for autogenerated flags.
+	cfgServerSection = "server."
+
 	// Command line args.
 	cmdHelp    = "help"
 	cmdVersion = "version"
@@ -70,7 +76,7 @@ const (
 )
 
 var ignore = map[string]struct{}{
-	cfgPeers:   {},
+	cmdPeers:   {},
 	cmdHelp:    {},
 	cmdVersion: {},
 }
@@ -105,7 +111,8 @@ func config() *viper.Viper {
 
 	flagSet.StringP(cmdWallet, "w", "", `path to the wallet`)
 	flagSet.String(cmdAddress, "", `address of wallet account`)
-	config := flagSet.String(cmdConfig, "", "config path")
+
+	configFlag := flagSet.String(cmdConfig, "", "config path")
 	flagSet.Duration(cmdNodeDialTimeout, defaultConnectTimeout, "gRPC node connect timeout")
 	flagSet.Duration(cmdHealthcheckTimeout, defaultHealthcheckTimeout, "gRPC healthcheck timeout")
 	flagSet.Duration(cmdRebalance, defaultRebalanceTimer, "gRPC connection rebalance timer")
@@ -127,24 +134,8 @@ func config() *viper.Viper {
 	v.SetDefault(cfgLoggerLevel, "debug")
 
 	// Bind flags
-	if err := v.BindPFlag(cfgPprofEnabled, flagSet.Lookup(cmdPprof)); err != nil {
+	if err := bindFlags(v, flagSet); err != nil {
-		panic(err)
+		panic(fmt.Errorf("bind flags: %w", err))
-	}
-	if err := v.BindPFlag(cfgPrometheusEnabled, flagSet.Lookup(cmdMetrics)); err != nil {
-		panic(err)
-	}
-	if err := v.BindPFlag(cfgNodeDialTimeout, flagSet.Lookup(cmdNodeDialTimeout)); err != nil {
-		panic(err)
-	}
-	if err := v.BindPFlag(cfgHealthcheckTimeout, flagSet.Lookup(cmdHealthcheckTimeout)); err != nil {
-		panic(err)
-	}
-	if err := v.BindPFlag(cfgRebalance, flagSet.Lookup(cmdRebalance)); err != nil {
-		panic(err)
-	}
-
-	if err := v.BindPFlags(flagSet); err != nil {
-		panic(err)
 	}
 
 	if err := flagSet.Parse(os.Args); err != nil {
@@ -175,27 +166,140 @@ func config() *viper.Viper {
 	case version != nil && *version:
 		fmt.Printf("NeoFS REST Gateway\nVersion: %s\nGoVersion: %s\n", Version, runtime.Version())
 		os.Exit(0)
-	}
+	case configFlag != nil && *configFlag != "":
-
+		if cfgFile, err := os.Open(*configFlag); err != nil {
-	if v.IsSet(cmdConfig) {
-		if cfgFile, err := os.Open(*config); err != nil {
 			panic(err)
-		} else if err := v.ReadConfig(cfgFile); err != nil {
+		} else if err = v.ReadConfig(cfgFile); err != nil {
 			panic(err)
 		}
 	}
 
 	if peers != nil && len(*peers) > 0 {
 		for i := range *peers {
-			v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+".address", (*peers)[i])
+			v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+"."+cfgPeerAddress, (*peers)[i])
-			v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+".weight", 1)
+			v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+"."+cfgPeerWeight, 1)
-			v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+".priority", 1)
+			v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+"."+cfgPeerWeight, 1)
 		}
 	}
 
 	return v
 }
 
+func bindFlags(v *viper.Viper, flagSet *pflag.FlagSet) error {
+	if err := v.BindPFlag(cfgPprofEnabled, flagSet.Lookup(cmdPprof)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(cfgPrometheusEnabled, flagSet.Lookup(cmdMetrics)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(cfgNodeDialTimeout, flagSet.Lookup(cmdNodeDialTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(cfgHealthcheckTimeout, flagSet.Lookup(cmdHealthcheckTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(cfgRebalance, flagSet.Lookup(cmdRebalance)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(cfgWalletPath, flagSet.Lookup(cmdWallet)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(cfgWalletAddress, flagSet.Lookup(cmdAddress)); err != nil {
+		return err
+	}
+
+	if err := restapi.BindFlagsToConfig(v, flagSet, cfgServerSection); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+var knownConfigParams = map[string]struct{}{
+	cfgWalletAddress:      {},
+	cfgWalletPath:         {},
+	cfgWalletPassphrase:   {},
+	cfgRebalance:          {},
+	cfgHealthcheckTimeout: {},
+	cfgNodeDialTimeout:    {},
+	cfgPoolErrorThreshold: {},
+	cfgLoggerLevel:        {},
+	cfgPrometheusEnabled:  {},
+	cfgPrometheusAddress:  {},
+	cfgPprofEnabled:       {},
+	cfgPprofAddress:       {},
+
+	cfgServerSection + restapi.FlagScheme:           {},
+	cfgServerSection + restapi.FlagCleanupTimeout:   {},
+	cfgServerSection + restapi.FlagGracefulTimeout:  {},
+	cfgServerSection + restapi.FlagMaxHeaderSize:    {},
+	cfgServerSection + restapi.FlagListenAddress:    {},
+	cfgServerSection + restapi.FlagListenLimit:      {},
+	cfgServerSection + restapi.FlagKeepAlive:        {},
+	cfgServerSection + restapi.FlagReadTimeout:      {},
+	cfgServerSection + restapi.FlagWriteTimeout:     {},
+	cfgServerSection + restapi.FlagTLSListenAddress: {},
+	cfgServerSection + restapi.FlagTLSCertificate:   {},
+	cfgServerSection + restapi.FlagTLSKey:           {},
+	cfgServerSection + restapi.FlagTLSCa:            {},
+	cfgServerSection + restapi.FlagTLSListenLimit:   {},
+	cfgServerSection + restapi.FlagTLSKeepAlive:     {},
+	cfgServerSection + restapi.FlagTLSReadTimeout:   {},
+	cfgServerSection + restapi.FlagTLSWriteTimeout:  {},
+}
+
+func validateConfig(cfg *viper.Viper, logger *zap.Logger) {
+	peerNumsMap := make(map[int]struct{})
+
+	for _, providedKey := range cfg.AllKeys() {
+		if !strings.HasPrefix(providedKey, cfgPeers) {
+			if _, ok := knownConfigParams[providedKey]; !ok {
+				logger.Warn("unknown config parameter", zap.String("key", providedKey))
+			}
+			continue
+		}
+
+		num, ok := isValidPeerKey(providedKey)
+		if !ok {
+			logger.Warn("unknown config parameter", zap.String("key", providedKey))
+		} else {
+			peerNumsMap[num] = struct{}{}
+		}
+	}
+
+	peerNums := make([]int, 0, len(peerNumsMap))
+	for num := range peerNumsMap {
+		peerNums = append(peerNums, num)
+	}
+	sort.Ints(peerNums)
+
+	for i, num := range peerNums {
+		if i != num {
+			logger.Warn("invalid config parameter, peer indexes must be consecutive starting from 0", zap.String("key", cfgPeers+"."+strconv.Itoa(num)))
+		}
+	}
+}
+
+func isValidPeerKey(key string) (int, bool) {
+	trimmed := strings.TrimPrefix(key, cfgPeers)
+	split := strings.Split(trimmed, ".")
+
+	if len(split) != 3 {
+		return 0, false
+	}
+
+	if split[2] != cfgPeerAddress && split[2] != cfgPeerPriority && split[2] != cfgPeerWeight {
+		return 0, false
+	}
+
+	num, err := strconv.Atoi(split[1])
+	if err != nil || num < 0 {
+		return 0, false
+	}
+
+	return num, true
+}
+
 func getNeoFSKey(logger *zap.Logger, cfg *viper.Viper) (*keys.PrivateKey, error) {
 	walletPath := cfg.GetString(cmdWallet)
 	if len(walletPath) == 0 {
@@ -303,22 +407,22 @@ func newLogger(v *viper.Viper) *zap.Logger {
 
 func serverConfig(v *viper.Viper) *restapi.ServerConfig {
 	return &restapi.ServerConfig{
-		EnabledListeners: v.GetStringSlice(restapi.FlagScheme),
+		EnabledListeners: v.GetStringSlice(cfgServerSection + restapi.FlagScheme),
-		CleanupTimeout:   v.GetDuration(restapi.FlagCleanupTimeout),
+		CleanupTimeout:   v.GetDuration(cfgServerSection + restapi.FlagCleanupTimeout),
-		GracefulTimeout:  v.GetDuration(restapi.FlagGracefulTimeout),
+		GracefulTimeout:  v.GetDuration(cfgServerSection + restapi.FlagGracefulTimeout),
-		MaxHeaderSize:    v.GetInt(restapi.FlagMaxHeaderSize),
+		MaxHeaderSize:    v.GetInt(cfgServerSection + restapi.FlagMaxHeaderSize),
 
-		ListenAddress: v.GetString(restapi.FlagListenAddress),
+		ListenAddress: v.GetString(cfgServerSection + restapi.FlagListenAddress),
-		ListenLimit:   v.GetInt(restapi.FlagListenLimit),
+		ListenLimit:   v.GetInt(cfgServerSection + restapi.FlagListenLimit),
-		KeepAlive:     v.GetDuration(restapi.FlagKeepAlive),
+		KeepAlive:     v.GetDuration(cfgServerSection + restapi.FlagKeepAlive),
-		ReadTimeout:   v.GetDuration(restapi.FlagReadTimeout),
+		ReadTimeout:   v.GetDuration(cfgServerSection + restapi.FlagReadTimeout),
-		WriteTimeout:  v.GetDuration(restapi.FlagWriteTimeout),
+		WriteTimeout:  v.GetDuration(cfgServerSection + restapi.FlagWriteTimeout),
 
-		TLSListenAddress: v.GetString(restapi.FlagTLSListenAddress),
+		TLSListenAddress: v.GetString(cfgServerSection + restapi.FlagTLSListenAddress),
-		TLSListenLimit:   v.GetInt(restapi.FlagTLSListenLimit),
+		TLSListenLimit:   v.GetInt(cfgServerSection + restapi.FlagTLSListenLimit),
-		TLSKeepAlive:     v.GetDuration(restapi.FlagTLSKeepAlive),
+		TLSKeepAlive:     v.GetDuration(cfgServerSection + restapi.FlagTLSKeepAlive),
-		TLSReadTimeout:   v.GetDuration(restapi.FlagTLSReadTimeout),
+		TLSReadTimeout:   v.GetDuration(cfgServerSection + restapi.FlagTLSReadTimeout),
-		TLSWriteTimeout:  v.GetDuration(restapi.FlagTLSWriteTimeout),
+		TLSWriteTimeout:  v.GetDuration(cfgServerSection + restapi.FlagTLSWriteTimeout),
 	}
 }
 
@@ -371,9 +475,9 @@ func fetchPeers(l *zap.Logger, v *viper.Viper) []pool.NodeParam {
 	var nodes []pool.NodeParam
 	for i := 0; ; i++ {
 		key := cfgPeers + "." + strconv.Itoa(i) + "."
-		address := v.GetString(key + "address")
+		address := v.GetString(key + cfgPeerAddress)
-		weight := v.GetFloat64(key + "weight")
+		weight := v.GetFloat64(key + cfgPeerWeight)
-		priority := v.GetInt(key + "priority")
+		priority := v.GetInt(key + cfgPeerPriority)
 
 		if address == "" {
 			break

cmd/neofs-rest-gw/integration_test.go

@@ -192,8 +192,8 @@ func getDefaultConfig(node string) *viper.Viper {
 	v.SetDefault(cfgPeers+".0.address", node)
 	v.SetDefault(cfgPeers+".0.weight", 1)
 	v.SetDefault(cfgPeers+".0.priority", 1)
-	v.SetDefault(restapi.FlagListenAddress, testListenAddress)
+	v.SetDefault(cfgServerSection+restapi.FlagListenAddress, testListenAddress)
-	v.SetDefault(restapi.FlagWriteTimeout, 60*time.Second)
+	v.SetDefault(cfgServerSection+restapi.FlagWriteTimeout, 60*time.Second)
 
 	return v
 }

cmd/neofs-rest-gw/main.go

@@ -16,6 +16,7 @@ func main() {
 
 	v := config()
 	logger := newLogger(v)
+	validateConfig(v, logger)
 
 	neofsAPI, err := newNeofsAPI(ctx, logger, v)
 	if err != nil {

config/config.env

@@ -46,39 +46,39 @@ REST_GW_POOL_REBALANCE_TIMER=60s
 REST_GW_POOL_ERROR_THRESHOLD=100
 
 # Grace period for which to wait before killing idle connections
-REST_GW_CLEANUP_TIMEOUT=10s
+REST_GW_SERVER_CLEANUP_TIMEOUT=10s
 # Grace period for which to wait before shutting down the server
-REST_GW_GRACEFUL_TIMEOUT=15s
+REST_GW_SERVER_GRACEFUL_TIMEOUT=15s
 # Controls the maximum number of bytes the server will read parsing the request header's keys and values,
 # including the request line. It does not limit the size of the request body.
-REST_GW_MAX_HEADER_SIZE=1000000
+REST_GW_SERVER_MAX_HEADER_SIZE=1000000
 
 # The IP and port to listen on.
-REST_GW_LISTEN_ADDRESS=localhost:8080
+REST_GW_SERVER_LISTEN_ADDRESS=localhost:8080
 # Limit the number of outstanding requests.
-REST_GW_LISTEN_LIMIT=0
+REST_GW_SERVER_LISTEN_LIMIT=0
 # Sets the TCP keep-alive timeouts on accepted connections.
 # It prunes dead TCP connections ( e.g. closing laptop mid-download).
-REST_GW_KEEP_ALIVE=3m
+REST_GW_SERVER_KEEP_ALIVE=3m
 # Maximum duration before timing out read of the request.
-REST_GW_READ_TIMEOUT=30s
+REST_GW_SERVER_READ_TIMEOUT=30s
 # Maximum duration before timing out write of the response.
-REST_GW_WRITE_TIMEOUT=30s
+REST_GW_SERVER_WRITE_TIMEOUT=30s
 
 # The IP and port to listen on.
-REST_GW_TLS_LISTEN_ADDRESS=localhost:8081
+REST_GW_SERVER_TLS_LISTEN_ADDRESS=localhost:8081
 # The certificate file to use for secure connections.
-REST_GW_TLS_CERTIFICATE=/path/to/tls/cert
+REST_GW_SERVER_TLS_CERTIFICATE=/path/to/tls/cert
 # The private key file to use for secure connections (without passphrase).
-REST_GW_TLS_KEY=/path/to/tls/key
+REST_GW_SERVER_TLS_KEY=/path/to/tls/key
 # The certificate authority certificate file to be used with mutual tls auth.
-REST_GW_TLS_CA=/path/to/tls/ca
+REST_GW_SERVER_TLS_CA=/path/to/tls/ca
 # Limit the number of outstanding requests.
-REST_GW_TLS_LISTEN_LIMIT=0
+REST_GW_SERVER_TLS_LISTEN_LIMIT=0
 # Sets the TCP keep-alive timeouts on accepted connections.
 # It prunes dead TCP connections ( e.g. closing laptop mid-download).
-REST_GW_TLS_KEEP_ALIVE=3m
+REST_GW_SERVER_TLS_KEEP_ALIVE=3m
 # Maximum duration before timing out read of the request.
-REST_GW_TLS_READ_TIMEOUT=30s
+REST_GW_SERVER_TLS_READ_TIMEOUT=30s
 # Maximum duration before timing out write of the response.
-REST_GW_TLS_WRITE_TIMEOUT=30s
+REST_GW_SERVER_TLS_WRITE_TIMEOUT=30s

config/config.yaml

@@ -50,42 +50,43 @@ pool:
       priority: 2
       weight: 9
 
-# The listeners to enable, this can be repeated and defaults to the schemes in the swagger spec.
+server:
-scheme: [ http ]
+  # The listeners to enable, this can be repeated and defaults to the schemes in the swagger spec.
-# Grace period for which to wait before killing idle connections
+  scheme: [ http ]
-cleanup-timeout: 10s
+  # Grace period for which to wait before killing idle connections
-# Grace period for which to wait before shutting down the server
+  cleanup-timeout: 10s
-graceful-timeout: 15s
+  # Grace period for which to wait before shutting down the server
-# Controls the maximum number of bytes the server will read parsing the request header's keys and values,
+  graceful-timeout: 15s
-# including the request line. It does not limit the size of the request body.
+  # Controls the maximum number of bytes the server will read parsing the request header's keys and values,
-max-header-size: 1000000
+  # including the request line. It does not limit the size of the request body.
+  max-header-size: 1000000
 
-# The IP and port to listen on.
+  # The IP and port to listen on.
-listen-address: localhost:8080
+  listen-address: localhost:8080
-# Limit the number of outstanding requests.
+  # Limit the number of outstanding requests.
-listen-limit: 0
+  listen-limit: 0
-# Sets the TCP keep-alive timeouts on accepted connections.
+  # Sets the TCP keep-alive timeouts on accepted connections.
-# It prunes dead TCP connections ( e.g. closing laptop mid-download).
+  # It prunes dead TCP connections ( e.g. closing laptop mid-download).
-keep-alive: 3m
+  keep-alive: 3m
-# Maximum duration before timing out read of the request.
+  # Maximum duration before timing out read of the request.
-read-timeout: 30s
+  read-timeout: 30s
-# Maximum duration before timing out write of the response.
+  # Maximum duration before timing out write of the response.
-write-timeout: 30s
+  write-timeout: 30s
 
-# The IP and port to listen on.
+  # The IP and port to listen on.
-tls-listen-address: localhost:8081
+  tls-listen-address: localhost:8081
-# The certificate file to use for secure connections.
+  # The certificate file to use for secure connections.
-tls-certificate: /path/to/tls/cert
+  tls-certificate: /path/to/tls/cert
-# The private key file to use for secure connections (without passphrase).
+  # The private key file to use for secure connections (without passphrase).
-tls-key: /path/to/tls/key
+  tls-key: /path/to/tls/key
-# The certificate authority certificate file to be used with mutual tls auth.
+  # The certificate authority certificate file to be used with mutual tls auth.
-tls-ca: /path/to/tls/ca
+  tls-ca: /path/to/tls/ca
-# Limit the number of outstanding requests.
+  # Limit the number of outstanding requests.
-tls-listen-limit: 0
+  tls-listen-limit: 0
-# Sets the TCP keep-alive timeouts on accepted connections.
+  # Sets the TCP keep-alive timeouts on accepted connections.
-# It prunes dead TCP connections ( e.g. closing laptop mid-download).
+  # It prunes dead TCP connections ( e.g. closing laptop mid-download).
-tls-keep-alive: 3m
+  tls-keep-alive: 3m
-# Maximum duration before timing out read of the request.
+  # Maximum duration before timing out read of the request.
-tls-read-timeout: 30s
+  tls-read-timeout: 30s
-# Maximum duration before timing out write of the response.
+  # Maximum duration before timing out write of the response.
-tls-write-timeout: 30s
+  tls-write-timeout: 30s

gen/restapi/server_config.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
 )
 
 const (
@@ -51,3 +52,63 @@ func BindDefaultFlags(flagSet *pflag.FlagSet) {
 	flagSet.Duration(FlagTLSReadTimeout, 30*time.Second, "maximum duration before timing out read of the request")
 	flagSet.Duration(FlagTLSWriteTimeout, 30*time.Second, "maximum duration before timing out write of the response")
 }
+
+// BindFlagsToConfig maps flags to viper config in specific section.
+func BindFlagsToConfig(v *viper.Viper, flagSet *pflag.FlagSet, section string) error {
+	if err := v.BindPFlag(section+FlagScheme, flagSet.Lookup(FlagScheme)); err != nil {
+		return err
+	}
+
+	if err := v.BindPFlag(section+FlagCleanupTimeout, flagSet.Lookup(FlagCleanupTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagGracefulTimeout, flagSet.Lookup(FlagGracefulTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagMaxHeaderSize, flagSet.Lookup(FlagMaxHeaderSize)); err != nil {
+		return err
+	}
+
+	if err := v.BindPFlag(section+FlagListenAddress, flagSet.Lookup(FlagListenAddress)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagListenLimit, flagSet.Lookup(FlagListenLimit)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagKeepAlive, flagSet.Lookup(FlagKeepAlive)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagReadTimeout, flagSet.Lookup(FlagReadTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagWriteTimeout, flagSet.Lookup(FlagWriteTimeout)); err != nil {
+		return err
+	}
+
+	if err := v.BindPFlag(section+FlagTLSListenAddress, flagSet.Lookup(FlagTLSListenAddress)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSCertificate, flagSet.Lookup(FlagTLSCertificate)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSKey, flagSet.Lookup(FlagTLSKey)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSCa, flagSet.Lookup(FlagTLSCa)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSListenLimit, flagSet.Lookup(FlagTLSListenLimit)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSKeepAlive, flagSet.Lookup(FlagTLSKeepAlive)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSReadTimeout, flagSet.Lookup(FlagTLSReadTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSWriteTimeout, flagSet.Lookup(FlagTLSWriteTimeout)); err != nil {
+		return err
+	}
+
+	return nil
+}

templates/server/config.gotmpl

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
 )
 
 const (
@@ -55,3 +56,63 @@ func BindDefaultFlags(flagSet *pflag.FlagSet) {
     flagSet.Duration(FlagTLSReadTimeout, 30*time.Second, "maximum duration before timing out read of the request")
     flagSet.Duration(FlagTLSWriteTimeout, 30*time.Second, "maximum duration before timing out write of the response")
 }
+
+// BindFlagsToConfig maps flags to viper config in specific section.
+func BindFlagsToConfig(v *viper.Viper, flagSet *pflag.FlagSet, section string) error {
+	if err := v.BindPFlag(section+FlagScheme, flagSet.Lookup(FlagScheme)); err != nil {
+		return err
+	}
+
+	if err := v.BindPFlag(section+FlagCleanupTimeout, flagSet.Lookup(FlagCleanupTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagGracefulTimeout, flagSet.Lookup(FlagGracefulTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagMaxHeaderSize, flagSet.Lookup(FlagMaxHeaderSize)); err != nil {
+		return err
+	}
+
+	if err := v.BindPFlag(section+FlagListenAddress, flagSet.Lookup(FlagListenAddress)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagListenLimit, flagSet.Lookup(FlagListenLimit)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagKeepAlive, flagSet.Lookup(FlagKeepAlive)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagReadTimeout, flagSet.Lookup(FlagReadTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagWriteTimeout, flagSet.Lookup(FlagWriteTimeout)); err != nil {
+		return err
+	}
+
+	if err := v.BindPFlag(section+FlagTLSListenAddress, flagSet.Lookup(FlagTLSListenAddress)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSCertificate, flagSet.Lookup(FlagTLSCertificate)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSKey, flagSet.Lookup(FlagTLSKey)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSCa, flagSet.Lookup(FlagTLSCa)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSListenLimit, flagSet.Lookup(FlagTLSListenLimit)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSKeepAlive, flagSet.Lookup(FlagTLSKeepAlive)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSReadTimeout, flagSet.Lookup(FlagTLSReadTimeout)); err != nil {
+		return err
+	}
+	if err := v.BindPFlag(section+FlagTLSWriteTimeout, flagSet.Lookup(FlagTLSWriteTimeout)); err != nil {
+		return err
+	}
+
+	return nil
+}