frostfs-http-gw/settings.go

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package main
import (
"fmt"
"io"
"os"
"sort"
"strconv"
"strings"
"time"
"github.com/spf13/pflag"
"github.com/spf13/viper"
)
type empty int
const (
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devNull = empty(0)
generated = "generated"
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defaultRebalanceTimer = 15 * time.Second
defaultRequestTimeout = 15 * time.Second
defaultConnectTimeout = 30 * time.Second
defaultKeepaliveTime = 10 * time.Second
defaultKeepaliveTimeout = 10 * time.Second
cfgListenAddress = "listen_address"
// KeepAlive
cfgKeepaliveTime = "keepalive.time"
cfgKeepaliveTimeout = "keepalive.timeout"
cfgKeepalivePermitWithoutStream = "keepalive.permit_without_stream"
// Web
cfgWebReadBufferSize = "web.read_buffer_size"
cfgWebWriteBufferSize = "web.write_buffer_size"
cfgWebReadTimeout = "web.read_timeout"
cfgWebWriteTimeout = "web.write_timeout"
cfgWebConnectionPerHost = "web.connection_per_host"
// Timeouts
cfgConTimeout = "connect_timeout"
cfgReqTimeout = "request_timeout"
cfgRebalance = "rebalance_timer"
// Logger:
cfgLoggerLevel = "logger.level"
cfgLoggerFormat = "logger.format"
cfgLoggerTraceLevel = "logger.trace_level"
cfgLoggerNoCaller = "logger.no_caller"
cfgLoggerNoDisclaimer = "logger.no_disclaimer"
cfgLoggerSamplingInitial = "logger.sampling.initial"
cfgLoggerSamplingThereafter = "logger.sampling.thereafter"
// Peers
cfgPeers = "peers"
// Application
cfgApplicationName = "app.name"
cfgApplicationVersion = "app.version"
cfgApplicationBuildTime = "app.build_time"
// command line args
cmdHelp = "help"
cmdVersion = "version"
cmdVerbose = "verbose"
cmdPprof = "pprof"
cmdMetrics = "metrics"
cmdNeoFSKey = "key"
)
var ignore = map[string]struct{}{
cfgApplicationName: {},
cfgApplicationVersion: {},
cfgApplicationBuildTime: {},
cfgPeers: {},
cmdHelp: {},
cmdVersion: {},
}
func (empty) Read([]byte) (int, error) { return 0, io.EOF }
func settings() *viper.Viper {
v := viper.New()
v.AutomaticEnv()
v.SetEnvPrefix(Prefix)
v.SetConfigType("yaml")
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
// flags setup:
flags := pflag.NewFlagSet("commandline", pflag.ExitOnError)
flags.SetOutput(os.Stdout)
flags.SortFlags = false
flags.Bool(cmdPprof, false, "enable pprof")
flags.Bool(cmdMetrics, false, "enable prometheus")
help := flags.BoolP(cmdHelp, "h", false, "show help")
version := flags.BoolP(cmdVersion, "v", false, "show version")
flags.String(cmdNeoFSKey, "", `"Path to private key file, hex string or wif`)
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flags.Bool(cmdVerbose, false, "debug gRPC connections")
flags.Duration(cfgConTimeout, defaultConnectTimeout, "gRPC connect timeout")
flags.Duration(cfgReqTimeout, defaultRequestTimeout, "gRPC request timeout")
flags.Duration(cfgRebalance, defaultRebalanceTimer, "gRPC connection rebalance timer")
flags.String(cfgListenAddress, "0.0.0.0:8082", "HTTP Gateway listen address")
peers := flags.StringArrayP(cfgPeers, "p", nil, "NeoFS nodes")
// set prefers:
v.Set(cfgApplicationName, "neofs-http-gw")
v.Set(cfgApplicationVersion, Version)
// set defaults:
// logger:
v.SetDefault(cfgLoggerLevel, "debug")
v.SetDefault(cfgLoggerFormat, "console")
v.SetDefault(cfgLoggerTraceLevel, "panic")
v.SetDefault(cfgLoggerNoCaller, false)
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)
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// web-server:
v.SetDefault(cfgWebReadBufferSize, 4096)
v.SetDefault(cfgWebWriteBufferSize, 4096)
v.SetDefault(cfgWebReadTimeout, time.Second*15)
v.SetDefault(cfgWebWriteTimeout, time.Minute)
v.SetDefault(cfgWebConnectionPerHost, 10)
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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 HTTP Gateway %s (%s)\n", Version, Build)
flags.PrintDefaults()
fmt.Println()
fmt.Println("Default environments:")
fmt.Println()
keys := v.AllKeys()
sort.Strings(keys)
for i := range keys {
if _, ok := ignore[keys[i]]; ok {
continue
}
k := strings.Replace(keys[i], ".", "_", -1)
fmt.Printf("%s_%s = %v\n", Prefix, strings.ToUpper(k), v.Get(keys[i]))
}
fmt.Println()
fmt.Println("Peers preset:")
fmt.Println()
fmt.Printf("%s_%s_[N]_ADDRESS = string\n", Prefix, strings.ToUpper(cfgPeers))
fmt.Printf("%s_%s_[N]_WEIGHT = 0..1 (float)\n", Prefix, strings.ToUpper(cfgPeers))
os.Exit(0)
case version != nil && *version:
fmt.Printf("NeoFS HTTP Gateway %s (%s)\n", Version, Build)
os.Exit(0)
}
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)+".weight", 1)
}
}
return v
}