frostfs-s3-gw/app-settings.go
2020-07-07 14:28:49 +03:00

213 lines
5.4 KiB
Go

package main
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"fmt"
"io"
"os"
"strconv"
"strings"
"time"
"github.com/minio/minio/neofs/pool"
"github.com/minio/minio/misc"
"github.com/nspcc-dev/neofs-api-go/refs"
crypto "github.com/nspcc-dev/neofs-crypto"
"github.com/spf13/pflag"
"github.com/spf13/viper"
"go.uber.org/zap"
)
type empty int
const (
devNull = empty(0)
generated = "generated"
minimumTTLInMinutes = 5
defaultTTL = minimumTTLInMinutes * time.Minute
defaultRebalanceTimer = 15 * time.Second
defaultRequestTimeout = 15 * time.Second
defaultConnectTimeout = 30 * time.Second
defaultKeepaliveTime = 10 * time.Second
defaultKeepaliveTimeout = 10 * time.Second
)
const ( // settings
// Logger:
cfgLoggerLevel = "logger.level"
cfgLoggerFormat = "logger.format"
cfgLoggerTraceLevel = "logger.trace_level"
cfgLoggerNoDisclaimer = "logger.no_disclaimer"
cfgLoggerSamplingInitial = "logger.sampling.initial"
cfgLoggerSamplingThereafter = "logger.sampling.thereafter"
// KeepAlive
cfgKeepaliveTime = "keepalive.time"
cfgKeepaliveTimeout = "keepalive.timeout"
cfgKeepalivePermitWithoutStream = "keepalive.permit_without_stream"
// Timeouts
cfgConnectionTTL = "con_ttl"
cfgConnectTimeout = "connect_timeout"
cfgRequestTimeout = "request_timeout"
cfgRebalanceTimer = "rebalance_timer"
// gRPC
cfgGRPCVerbose = "verbose"
cfgGRPCPrivateKey = "key"
// Metrics / Profiler / Web
cfgEnableMetrics = "metrics"
cfgEnableProfiler = "pprof"
cfgListenAddress = "listen_address"
// Application
cfgApplicationName = "app.name"
cfgApplicationVersion = "app.version"
cfgApplicationBuildTime = "app.build_time"
)
func (empty) Read([]byte) (int, error) { return 0, io.EOF }
func fetchKey(l *zap.Logger, v *viper.Viper) *ecdsa.PrivateKey {
switch val := v.GetString("key"); val {
case generated:
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
l.Fatal("could not generate private key", zap.Error(err))
}
id, err := refs.NewOwnerID(&key.PublicKey)
l.Info("generate new key",
zap.Stringer("key", id),
zap.Error(err))
return key
default:
key, err := crypto.LoadPrivateKey(val)
if err != nil {
l.Fatal("could not load private key",
zap.String("key", v.GetString("key")),
zap.Error(err))
}
return key
}
}
func fetchPeers(l *zap.Logger, v *viper.Viper) []pool.Peer {
peers := make([]pool.Peer, 0)
for i := 0; ; i++ {
key := "peers." + strconv.Itoa(i) + "."
address := v.GetString(key + "address")
weight := v.GetFloat64(key + "weight")
if address == "" {
l.Warn("skip, empty address")
break
}
peers = append(peers, pool.Peer{
Address: address,
Weight: weight,
})
}
return peers
}
func newSettings() *viper.Viper {
v := viper.New()
v.AutomaticEnv()
v.SetEnvPrefix("S3")
v.SetConfigType("yaml")
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
// flags setup:
flags := pflag.NewFlagSet("commandline", pflag.ExitOnError)
flags.SortFlags = false
flags.Bool(cfgEnableProfiler, false, "enable pprof")
flags.Bool(cfgEnableMetrics, false, "enable prometheus")
help := flags.BoolP("help", "h", false, "show help")
version := flags.BoolP("version", "v", false, "show version")
flags.String(cfgGRPCPrivateKey, generated, `"`+generated+`" to generate key, path to private key file, hex string or wif`)
flags.Bool(cfgGRPCVerbose, false, "debug gRPC connections")
flags.Duration(cfgRequestTimeout, defaultRequestTimeout, "gRPC request timeout")
flags.Duration(cfgConnectTimeout, defaultConnectTimeout, "gRPC connect timeout")
flags.Duration(cfgRebalanceTimer, defaultRebalanceTimer, "gRPC connection rebalance timer")
ttl := flags.DurationP(cfgConnectionTTL, "t", defaultTTL, "gRPC connection time to live")
flags.String(cfgListenAddress, "0.0.0.0:8080", "S3 Gateway listen address")
peers := flags.StringArrayP("peers", "p", nil, "NeoFS nodes")
// set prefers:
v.Set(cfgApplicationName, misc.ApplicationName)
v.Set(cfgApplicationVersion, misc.Version)
v.Set(cfgApplicationBuildTime, misc.Build)
// set defaults:
// logger:
v.SetDefault(cfgLoggerLevel, "debug")
v.SetDefault(cfgLoggerFormat, "console")
v.SetDefault(cfgLoggerTraceLevel, "fatal")
v.SetDefault(cfgLoggerNoDisclaimer, true)
v.SetDefault(cfgLoggerSamplingInitial, 1000)
v.SetDefault(cfgLoggerSamplingThereafter, 1000)
// keepalive:
// If set below 10s, a minimum value of 10s will be used instead.
v.SetDefault(cfgKeepaliveTime, defaultKeepaliveTime)
v.SetDefault(cfgKeepaliveTimeout, defaultKeepaliveTimeout)
v.SetDefault(cfgKeepalivePermitWithoutStream, true)
if err := v.BindPFlags(flags); err != nil {
panic(err)
}
if err := v.ReadConfig(devNull); err != nil {
panic(err)
}
if err := flags.Parse(os.Args); err != nil {
panic(err)
}
switch {
case help != nil && *help:
fmt.Printf("NeoFS S3 Gateway %s (%s)\n", misc.Version, misc.Build)
flags.PrintDefaults()
os.Exit(0)
case version != nil && *version:
fmt.Printf("NeoFS S3 Gateway %s (%s)\n", misc.Version, misc.Build)
os.Exit(0)
case ttl != nil && ttl.Minutes() < minimumTTLInMinutes:
fmt.Printf("connection ttl should not be less than %s", defaultTTL)
}
if peers != nil && len(*peers) > 0 {
for i := range *peers {
v.SetDefault("peers."+strconv.Itoa(i)+".address", (*peers)[i])
v.SetDefault("peers."+strconv.Itoa(i)+".weight", 1)
}
}
return v
}