frostfs-s3-gw/cmd/s3-gw/app_settings.go
Denis Kirillov 6304d7bfda [#260] Support frostfsid validation
Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>
2023-11-23 11:00:11 +03:00

846 lines
23 KiB
Go

package main
import (
"encoding/json"
"fmt"
"math"
"os"
"path"
"runtime"
"sort"
"strconv"
"strings"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/handler"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/notifications"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/resolver"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/version"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
"git.frostfs.info/TrueCloudLab/zapjournald"
"github.com/spf13/pflag"
"github.com/spf13/viper"
"github.com/ssgreg/journald"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
const (
destinationStdout = "stdout"
destinationJournald = "journald"
)
const (
defaultRebalanceInterval = 60 * time.Second
defaultHealthcheckTimeout = 15 * time.Second
defaultConnectTimeout = 10 * time.Second
defaultStreamTimeout = 10 * time.Second
defaultShutdownTimeout = 15 * time.Second
defaultPoolErrorThreshold uint32 = 100
defaultPlacementPolicy = "REP 3"
defaultMaxClientsCount = 100
defaultMaxClientsDeadline = time.Second * 30
defaultSoftMemoryLimit = math.MaxInt64
defaultReadHeaderTimeout = 30 * time.Second
defaultIdleTimeout = 30 * time.Second
)
var defaultCopiesNumbers = []uint32{0}
const ( // Settings.
// Logger.
cfgLoggerLevel = "logger.level"
cfgLoggerDestination = "logger.destination"
// Wallet.
cfgWalletPath = "wallet.path"
cfgWalletAddress = "wallet.address"
cfgWalletPassphrase = "wallet.passphrase"
cmdWallet = "wallet"
cmdAddress = "address"
// Server.
cfgServer = "server"
cfgTLSEnabled = "tls.enabled"
cfgTLSKeyFile = "tls.key_file"
cfgTLSCertFile = "tls.cert_file"
// Pool config.
cfgConnectTimeout = "connect_timeout"
cfgStreamTimeout = "stream_timeout"
cfgHealthcheckTimeout = "healthcheck_timeout"
cfgRebalanceInterval = "rebalance_interval"
cfgPoolErrorThreshold = "pool_error_threshold"
// Caching.
cfgObjectsCacheLifetime = "cache.objects.lifetime"
cfgObjectsCacheSize = "cache.objects.size"
cfgListObjectsCacheLifetime = "cache.list.lifetime"
cfgListObjectsCacheSize = "cache.list.size"
cfgBucketsCacheLifetime = "cache.buckets.lifetime"
cfgBucketsCacheSize = "cache.buckets.size"
cfgNamesCacheLifetime = "cache.names.lifetime"
cfgNamesCacheSize = "cache.names.size"
cfgSystemCacheLifetime = "cache.system.lifetime"
cfgSystemCacheSize = "cache.system.size"
cfgAccessBoxCacheLifetime = "cache.accessbox.lifetime"
cfgAccessBoxCacheSize = "cache.accessbox.size"
cfgAccessControlCacheLifetime = "cache.accesscontrol.lifetime"
cfgAccessControlCacheSize = "cache.accesscontrol.size"
// NATS.
cfgEnableNATS = "nats.enabled"
cfgNATSEndpoint = "nats.endpoint"
cfgNATSTimeout = "nats.timeout"
cfgNATSTLSCertFile = "nats.cert_file"
cfgNATSAuthPrivateKeyFile = "nats.key_file"
cfgNATSRootCAFiles = "nats.root_ca"
// Policy.
cfgPolicyDefault = "placement_policy.default"
cfgPolicyRegionMapFile = "placement_policy.region_mapping"
cfgCopiesNumbers = "placement_policy.copies_numbers"
// CORS.
cfgDefaultMaxAge = "cors.default_max_age"
// MaxClients.
cfgMaxClientsCount = "max_clients_count"
cfgMaxClientsDeadline = "max_clients_deadline"
// Metrics / Profiler / Web.
cfgPrometheusEnabled = "prometheus.enabled"
cfgPrometheusAddress = "prometheus.address"
cfgPProfEnabled = "pprof.enabled"
cfgPProfAddress = "pprof.address"
// Tracing.
cfgTracingEnabled = "tracing.enabled"
cfgTracingExporter = "tracing.exporter"
cfgTracingEndpoint = "tracing.endpoint"
cfgListenDomains = "listen_domains"
// Peers.
cfgPeers = "peers"
// NeoGo.
cfgRPCEndpoint = "rpc_endpoint"
// Resolving.
cfgResolveOrder = "resolve_order"
// Application.
cfgApplicationBuildTime = "app.build_time"
// Kludge.
cfgKludgeUseDefaultXMLNS = "kludge.use_default_xmlns"
cfgKludgeBypassContentEncodingCheckInChunks = "kludge.bypass_content_encoding_check_in_chunks"
// Web.
cfgWebReadTimeout = "web.read_timeout"
cfgWebReadHeaderTimeout = "web.read_header_timeout"
cfgWebWriteTimeout = "web.write_timeout"
cfgWebIdleTimeout = "web.idle_timeout"
// Command line args.
cmdHelp = "help"
cmdVersion = "version"
cmdConfig = "config"
cmdConfigDir = "config-dir"
cmdPProf = "pprof"
cmdMetrics = "metrics"
cmdListenAddress = "listen_address"
// Configuration of parameters of requests to FrostFS.
// Number of the object copies to consider PUT to FrostFS successful.
cfgSetCopiesNumber = "frostfs.set_copies_number"
// Enabling client side object preparing for PUT operations.
cfgClientCut = "frostfs.client_cut"
// Sets max buffer size for read payload in put operations.
cfgBufferMaxSizeForPut = "frostfs.buffer_max_size_for_put"
// List of allowed AccessKeyID prefixes.
cfgAllowedAccessKeyIDPrefixes = "allowed_access_key_id_prefixes"
// Bucket resolving options.
cfgResolveBucketAllow = "resolve_bucket.allow"
cfgResolveBucketDeny = "resolve_bucket.deny"
// Runtime.
cfgSoftMemoryLimit = "runtime.soft_memory_limit"
// Enable return MD5 checksum in ETag.
cfgMD5Enabled = "features.md5.enabled"
// FrostfsID.
cfgFrostfsIDEnabled = "frostfsid.enabled"
cfgFrostfsIDContract = "frostfsid.contract"
// envPrefix is an environment variables prefix used for configuration.
envPrefix = "S3_GW"
)
var ignore = map[string]struct{}{
cfgApplicationBuildTime: {},
cfgPeers: {},
cmdHelp: {},
cmdVersion: {},
}
func fetchConnectTimeout(cfg *viper.Viper) time.Duration {
connTimeout := cfg.GetDuration(cfgConnectTimeout)
if connTimeout <= 0 {
connTimeout = defaultConnectTimeout
}
return connTimeout
}
func fetchStreamTimeout(cfg *viper.Viper) time.Duration {
streamTimeout := cfg.GetDuration(cfgStreamTimeout)
if streamTimeout <= 0 {
streamTimeout = defaultStreamTimeout
}
return streamTimeout
}
func fetchHealthCheckTimeout(cfg *viper.Viper) time.Duration {
healthCheckTimeout := cfg.GetDuration(cfgHealthcheckTimeout)
if healthCheckTimeout <= 0 {
healthCheckTimeout = defaultHealthcheckTimeout
}
return healthCheckTimeout
}
func fetchRebalanceInterval(cfg *viper.Viper) time.Duration {
rebalanceInterval := cfg.GetDuration(cfgRebalanceInterval)
if rebalanceInterval <= 0 {
rebalanceInterval = defaultRebalanceInterval
}
return rebalanceInterval
}
func fetchErrorThreshold(cfg *viper.Viper) uint32 {
errorThreshold := cfg.GetUint32(cfgPoolErrorThreshold)
if errorThreshold <= 0 {
errorThreshold = defaultPoolErrorThreshold
}
return errorThreshold
}
func fetchMaxClientsCount(cfg *viper.Viper) int {
maxClientsCount := cfg.GetInt(cfgMaxClientsCount)
if maxClientsCount <= 0 {
maxClientsCount = defaultMaxClientsCount
}
return maxClientsCount
}
func fetchMaxClientsDeadline(cfg *viper.Viper) time.Duration {
maxClientsDeadline := cfg.GetDuration(cfgMaxClientsDeadline)
if maxClientsDeadline <= 0 {
maxClientsDeadline = defaultMaxClientsDeadline
}
return maxClientsDeadline
}
func fetchSoftMemoryLimit(cfg *viper.Viper) int64 {
softMemoryLimit := cfg.GetSizeInBytes(cfgSoftMemoryLimit)
if softMemoryLimit <= 0 {
softMemoryLimit = defaultSoftMemoryLimit
}
return int64(softMemoryLimit)
}
func fetchDefaultPolicy(l *zap.Logger, cfg *viper.Viper) netmap.PlacementPolicy {
var policy netmap.PlacementPolicy
if cfg.IsSet(cfgPolicyDefault) {
policyStr := cfg.GetString(cfgPolicyDefault)
if err := policy.DecodeString(policyStr); err != nil {
l.Warn(logs.FailedToParseDefaultLocationConstraint,
zap.String("policy", policyStr), zap.String("default", defaultPlacementPolicy), zap.Error(err))
} else {
return policy
}
}
if err := policy.DecodeString(defaultPlacementPolicy); err != nil {
l.Fatal(logs.FailedToParseDefaultDefaultLocationConstraint, zap.String("policy", defaultPlacementPolicy))
}
return policy
}
func fetchNATSTimeout(cfg *viper.Viper, l *zap.Logger) time.Duration {
timeout := cfg.GetDuration(cfgNATSTimeout)
if timeout <= 0 {
l.Error(logs.InvalidLifetimeUsingDefaultValue,
zap.String("parameter", cfgNATSTimeout),
zap.Duration("value in config", timeout),
zap.Duration("default", notifications.DefaultTimeout))
timeout = notifications.DefaultTimeout
}
return timeout
}
func fetchCacheLifetime(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultValue time.Duration) time.Duration {
if v.IsSet(cfgEntry) {
lifetime := v.GetDuration(cfgEntry)
if lifetime <= 0 {
l.Error(logs.InvalidLifetimeUsingDefaultValue,
zap.String("parameter", cfgEntry),
zap.Duration("value in config", lifetime),
zap.Duration("default", defaultValue))
} else {
return lifetime
}
}
return defaultValue
}
func fetchCacheSize(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultValue int) int {
if v.IsSet(cfgEntry) {
size := v.GetInt(cfgEntry)
if size <= 0 {
l.Error(logs.InvalidCacheSizeUsingDefaultValue,
zap.String("parameter", cfgEntry),
zap.Int("value in config", size),
zap.Int("default", defaultValue))
} else {
return size
}
}
return defaultValue
}
func fetchDefaultMaxAge(cfg *viper.Viper, l *zap.Logger) int {
defaultMaxAge := handler.DefaultMaxAge
if cfg.IsSet(cfgDefaultMaxAge) {
defaultMaxAge = cfg.GetInt(cfgDefaultMaxAge)
if defaultMaxAge <= 0 && defaultMaxAge != -1 {
l.Fatal(logs.InvalidDefaultMaxAge,
zap.String("parameter", cfgDefaultMaxAge),
zap.String("value in config", strconv.Itoa(defaultMaxAge)))
}
}
return defaultMaxAge
}
func fetchRegionMappingPolicies(l *zap.Logger, cfg *viper.Viper) map[string]netmap.PlacementPolicy {
filepath := cfg.GetString(cfgPolicyRegionMapFile)
regionPolicyMap, err := readRegionMap(filepath)
if err != nil {
l.Warn(logs.FailedToReadRegionMapFilePolicies, zap.String("file", filepath), zap.Error(err))
return make(map[string]netmap.PlacementPolicy)
}
regionMap := make(map[string]netmap.PlacementPolicy, len(regionPolicyMap))
for region, policy := range regionPolicyMap {
if region == api.DefaultLocationConstraint {
l.Warn(logs.DefaultLocationConstraintCantBeOverriden, zap.String("policy", policy))
continue
}
var pp netmap.PlacementPolicy
if err = pp.DecodeString(policy); err == nil {
regionMap[region] = pp
continue
}
if err = pp.UnmarshalJSON([]byte(policy)); err == nil {
regionMap[region] = pp
continue
}
l.Warn(logs.FailedToParseLocationConstraint, zap.String("region", region), zap.String("policy", policy))
}
return regionMap
}
func readRegionMap(filePath string) (map[string]string, error) {
regionMap := make(map[string]string)
if filePath == "" {
return regionMap, nil
}
data, err := os.ReadFile(filePath)
if err != nil {
return nil, fmt.Errorf("coudln't read file '%s'", filePath)
}
if err = json.Unmarshal(data, &regionMap); err != nil {
return nil, fmt.Errorf("unmarshal policies: %w", err)
}
return regionMap, nil
}
func fetchDefaultCopiesNumbers(l *zap.Logger, v *viper.Viper) []uint32 {
unparsed := v.GetStringSlice(cfgSetCopiesNumber)
result := make([]uint32, len(unparsed))
for i := range unparsed {
parsedValue, err := strconv.ParseUint(unparsed[i], 10, 32)
if err != nil {
l.Warn(logs.FailedToParseDefaultCopiesNumbers,
zap.Strings("copies numbers", unparsed), zap.Uint32s("default", defaultCopiesNumbers), zap.Error(err))
return defaultCopiesNumbers
}
result[i] = uint32(parsedValue)
}
return result
}
func fetchCopiesNumbers(l *zap.Logger, v *viper.Viper) map[string][]uint32 {
copiesNums := make(map[string][]uint32)
for i := 0; ; i++ {
key := cfgCopiesNumbers + "." + strconv.Itoa(i) + "."
constraint := v.GetString(key + "location_constraint")
vector := v.GetStringSlice(key + "vector")
if constraint == "" || len(vector) == 0 {
break
}
vector32 := make([]uint32, len(vector))
for j := range vector {
parsedValue, err := strconv.ParseUint(vector[j], 10, 32)
if err != nil {
l.Warn(logs.FailedToParseCopiesNumbers, zap.String("location", constraint),
zap.Strings("copies numbers", vector), zap.Error(err))
continue
}
vector32[j] = uint32(parsedValue)
}
copiesNums[constraint] = vector32
l.Info(logs.ConstraintAdded, zap.String("location", constraint), zap.Strings("copies numbers", vector))
}
return copiesNums
}
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")
weight := v.GetFloat64(key + "weight")
priority := v.GetInt(key + "priority")
if address == "" {
l.Warn(logs.SkipEmptyAddress)
break
}
if weight <= 0 { // unspecified or wrong
weight = 1
}
if priority <= 0 { // unspecified or wrong
priority = 1
}
nodes = append(nodes, pool.NewNodeParam(priority, address, weight))
l.Info(logs.AddedStoragePeer,
zap.Int("priority", priority),
zap.String("address", address),
zap.Float64("weight", weight))
}
return nodes
}
func fetchServers(v *viper.Viper) []ServerInfo {
var servers []ServerInfo
for i := 0; ; i++ {
key := cfgServer + "." + strconv.Itoa(i) + "."
var serverInfo ServerInfo
serverInfo.Address = v.GetString(key + "address")
serverInfo.TLS.Enabled = v.GetBool(key + cfgTLSEnabled)
serverInfo.TLS.KeyFile = v.GetString(key + cfgTLSKeyFile)
serverInfo.TLS.CertFile = v.GetString(key + cfgTLSCertFile)
if serverInfo.Address == "" {
break
}
servers = append(servers, serverInfo)
}
return servers
}
func newSettings() *viper.Viper {
v := viper.New()
v.AutomaticEnv()
v.SetEnvPrefix(envPrefix)
v.SetConfigType("yaml")
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
v.AllowEmptyEnv(true)
// 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 metrics")
help := flags.BoolP(cmdHelp, "h", false, "show help")
versionFlag := flags.BoolP(cmdVersion, "v", false, "show version")
flags.StringP(cmdWallet, "w", "", `path to the wallet`)
flags.String(cmdAddress, "", `address of wallet account`)
flags.StringArray(cmdConfig, nil, "config paths")
flags.String(cmdConfigDir, "", "config dir path")
flags.Duration(cfgHealthcheckTimeout, defaultHealthcheckTimeout, "set timeout to check node health during rebalance")
flags.Duration(cfgConnectTimeout, defaultConnectTimeout, "set timeout to connect to FrostFS nodes")
flags.Duration(cfgRebalanceInterval, defaultRebalanceInterval, "set rebalance interval")
flags.Int(cfgMaxClientsCount, defaultMaxClientsCount, "set max-clients count")
flags.Duration(cfgMaxClientsDeadline, defaultMaxClientsDeadline, "set max-clients deadline")
flags.String(cmdListenAddress, "0.0.0.0:8080", "set the main address to listen")
flags.String(cfgTLSCertFile, "", "TLS certificate file to use")
flags.String(cfgTLSKeyFile, "", "TLS key file to use")
peers := flags.StringArrayP(cfgPeers, "p", nil, "set FrostFS nodes")
flags.StringP(cfgRPCEndpoint, "r", "", "set RPC endpoint")
resolveMethods := flags.StringSlice(cfgResolveOrder, []string{resolver.DNSResolver}, "set bucket name resolve order")
domains := flags.StringSliceP(cfgListenDomains, "d", nil, "set domains to be listened")
// set defaults:
// logger:
v.SetDefault(cfgLoggerLevel, "debug")
v.SetDefault(cfgLoggerDestination, "stdout")
// pool:
v.SetDefault(cfgPoolErrorThreshold, defaultPoolErrorThreshold)
v.SetDefault(cfgStreamTimeout, defaultStreamTimeout)
v.SetDefault(cfgPProfAddress, "localhost:8085")
v.SetDefault(cfgPrometheusAddress, "localhost:8086")
// frostfs
v.SetDefault(cfgBufferMaxSizeForPut, 1024*1024) // 1mb
// kludge
v.SetDefault(cfgKludgeUseDefaultXMLNS, false)
v.SetDefault(cfgKludgeBypassContentEncodingCheckInChunks, false)
// web
v.SetDefault(cfgWebReadHeaderTimeout, defaultReadHeaderTimeout)
v.SetDefault(cfgWebIdleTimeout, defaultIdleTimeout)
// frostfsid
v.SetDefault(cfgFrostfsIDContract, "frostfsid.frostfs")
v.SetDefault(cfgFrostfsIDEnabled, true)
// Bind flags
if err := bindFlags(v, flags); err != nil {
panic(fmt.Errorf("bind flags: %w", err))
}
if err := flags.Parse(os.Args); err != nil {
panic(err)
}
if v.IsSet(cfgServer+".0."+cfgTLSKeyFile) && v.IsSet(cfgServer+".0."+cfgTLSCertFile) {
v.Set(cfgServer+".0."+cfgTLSEnabled, true)
}
if resolveMethods != nil {
v.SetDefault(cfgResolveOrder, *resolveMethods)
}
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)
v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+".priority", 1)
}
}
if domains != nil && len(*domains) > 0 {
v.SetDefault(cfgListenDomains, *domains)
}
switch {
case help != nil && *help:
fmt.Printf("FrostFS S3 gateway %s\n", version.Version)
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
}
defaultValue := v.GetString(keys[i])
if len(defaultValue) == 0 {
continue
}
k := strings.Replace(keys[i], ".", "_", -1)
fmt.Printf("%s_%s = %s\n", envPrefix, strings.ToUpper(k), defaultValue)
}
fmt.Println()
fmt.Println("Peers preset:")
fmt.Println()
fmt.Printf("%s_%s_[N]_ADDRESS = string\n", envPrefix, strings.ToUpper(cfgPeers))
fmt.Printf("%s_%s_[N]_WEIGHT = 0..1 (float)\n", envPrefix, strings.ToUpper(cfgPeers))
os.Exit(0)
case versionFlag != nil && *versionFlag:
fmt.Printf("FrostFS S3 Gateway\nVersion: %s\nGoVersion: %s\n", version.Version, runtime.Version())
os.Exit(0)
}
if err := readInConfig(v); err != nil {
panic(err)
}
return v
}
func bindFlags(v *viper.Viper, flags *pflag.FlagSet) error {
if err := v.BindPFlag(cfgPProfEnabled, flags.Lookup(cmdPProf)); err != nil {
return err
}
if err := v.BindPFlag(cfgPrometheusEnabled, flags.Lookup(cmdMetrics)); err != nil {
return err
}
if err := v.BindPFlag(cmdConfig, flags.Lookup(cmdConfig)); err != nil {
return err
}
if err := v.BindPFlag(cmdConfigDir, flags.Lookup(cmdConfigDir)); err != nil {
return err
}
if err := v.BindPFlag(cfgWalletPath, flags.Lookup(cmdWallet)); err != nil {
return err
}
if err := v.BindPFlag(cfgWalletAddress, flags.Lookup(cmdAddress)); err != nil {
return err
}
if err := v.BindPFlag(cfgHealthcheckTimeout, flags.Lookup(cfgHealthcheckTimeout)); err != nil {
return err
}
if err := v.BindPFlag(cfgConnectTimeout, flags.Lookup(cfgConnectTimeout)); err != nil {
return err
}
if err := v.BindPFlag(cfgRebalanceInterval, flags.Lookup(cfgRebalanceInterval)); err != nil {
return err
}
if err := v.BindPFlag(cfgMaxClientsCount, flags.Lookup(cfgMaxClientsCount)); err != nil {
return err
}
if err := v.BindPFlag(cfgMaxClientsDeadline, flags.Lookup(cfgMaxClientsDeadline)); err != nil {
return err
}
if err := v.BindPFlag(cfgRPCEndpoint, flags.Lookup(cfgRPCEndpoint)); err != nil {
return err
}
if err := v.BindPFlag(cfgServer+".0.address", flags.Lookup(cmdListenAddress)); err != nil {
return err
}
if err := v.BindPFlag(cfgServer+".0."+cfgTLSKeyFile, flags.Lookup(cfgTLSKeyFile)); err != nil {
return err
}
return v.BindPFlag(cfgServer+".0."+cfgTLSCertFile, flags.Lookup(cfgTLSCertFile))
}
func readInConfig(v *viper.Viper) error {
if v.IsSet(cmdConfig) {
if err := readConfig(v); err != nil {
return err
}
}
if v.IsSet(cmdConfigDir) {
if err := readConfigDir(v); err != nil {
return err
}
}
return nil
}
func readConfigDir(v *viper.Viper) error {
cfgSubConfigDir := v.GetString(cmdConfigDir)
entries, err := os.ReadDir(cfgSubConfigDir)
if err != nil {
return err
}
for _, entry := range entries {
if entry.IsDir() {
continue
}
ext := path.Ext(entry.Name())
if ext != ".yaml" && ext != ".yml" {
continue
}
if err = mergeConfig(v, path.Join(cfgSubConfigDir, entry.Name())); err != nil {
return err
}
}
return nil
}
func readConfig(v *viper.Viper) error {
for _, fileName := range v.GetStringSlice(cmdConfig) {
if err := mergeConfig(v, fileName); err != nil {
return err
}
}
return nil
}
func mergeConfig(v *viper.Viper, fileName string) error {
cfgFile, err := os.Open(fileName)
if err != nil {
return err
}
defer func() {
if errClose := cfgFile.Close(); errClose != nil {
panic(errClose)
}
}()
return v.MergeConfig(cfgFile)
}
func pickLogger(v *viper.Viper) *Logger {
lvl, err := getLogLevel(v)
if err != nil {
panic(err)
}
dest := v.GetString(cfgLoggerDestination)
switch dest {
case destinationStdout:
return newStdoutLogger(lvl)
case destinationJournald:
return newJournaldLogger(lvl)
default:
panic(fmt.Sprintf("wrong destination for logger: %s", dest))
}
}
// newStdoutLogger constructs a Logger instance for the current application.
// Panics on failure.
//
// Logger contains a logger is built from zap's production logging configuration with:
// - parameterized level (debug by default)
// - console encoding
// - ISO8601 time encoding
//
// and atomic log level to dynamically change it.
//
// Logger records a stack trace for all messages at or above fatal level.
//
// See also zapcore.Level, zap.NewProductionConfig, zap.AddStacktrace.
func newStdoutLogger(lvl zapcore.Level) *Logger {
c := zap.NewProductionConfig()
c.Level = zap.NewAtomicLevelAt(lvl)
c.Encoding = "console"
c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
l, err := c.Build(
zap.AddStacktrace(zap.NewAtomicLevelAt(zap.FatalLevel)),
)
if err != nil {
panic(fmt.Sprintf("build zap logger instance: %v", err))
}
return &Logger{
logger: l,
lvl: c.Level,
}
}
func newJournaldLogger(lvl zapcore.Level) *Logger {
c := zap.NewProductionConfig()
c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
c.Level = zap.NewAtomicLevelAt(lvl)
encoder := zapcore.NewConsoleEncoder(c.EncoderConfig)
core := zapjournald.NewCore(zap.NewAtomicLevelAt(lvl), encoder, &journald.Journal{}, zapjournald.SyslogFields)
coreWithContext := core.With([]zapcore.Field{
zapjournald.SyslogFacility(zapjournald.LogDaemon),
zapjournald.SyslogIdentifier(),
zapjournald.SyslogPid(),
})
l := zap.New(coreWithContext, zap.AddStacktrace(zap.NewAtomicLevelAt(zap.FatalLevel)))
return &Logger{
logger: l,
lvl: c.Level,
}
}
func getLogLevel(v *viper.Viper) (zapcore.Level, error) {
var lvl zapcore.Level
lvlStr := v.GetString(cfgLoggerLevel)
err := lvl.UnmarshalText([]byte(lvlStr))
if err != nil {
return lvl, fmt.Errorf("incorrect logger level configuration %s (%v), "+
"value should be one of %v", lvlStr, err, [...]zapcore.Level{
zapcore.DebugLevel,
zapcore.InfoLevel,
zapcore.WarnLevel,
zapcore.ErrorLevel,
zapcore.DPanicLevel,
zapcore.PanicLevel,
zapcore.FatalLevel,
})
}
return lvl, nil
}