diff --git a/bittorrent/bittorrent.go b/bittorrent/bittorrent.go
index 689427e..ad66eb7 100644
--- a/bittorrent/bittorrent.go
+++ b/bittorrent/bittorrent.go
@@ -13,8 +13,7 @@ import (
 	"net/netip"
 
 	"github.com/pkg/errors"
-
-	"github.com/sot-tech/mochi/pkg/log"
+	"github.com/rs/zerolog"
 )
 
 // PeerIDLen is length of peer id field in bytes
@@ -126,6 +125,13 @@ type Scrape struct {
 	Incomplete uint32
 }
 
+func (s Scrape) MarshalZerologObject(e *zerolog.Event) {
+	e.Stringer("infoHash", s.InfoHash).
+		Uint32("snatches", s.Snatches).
+		Uint32("complete", s.Complete).
+		Uint32("incomplete", s.Incomplete)
+}
+
 // Peer represents the connection details of a peer that is returned in an
 // announce response.
 type Peer struct {
@@ -181,13 +187,11 @@ func (p Peer) RawString() string {
 	return string(b)
 }
 
-// LogFields renders the current peer as a set of Logrus fields.
-func (p Peer) LogFields() log.Fields {
-	return log.Fields{
-		"id":   p.ID,
-		"ip":   p.Addr(),
-		"port": p.Port(),
-	}
+func (p Peer) MarshalZerologObject(e *zerolog.Event) {
+	e.Stringer("id", p.ID).
+		Stringer("address", p.Addr()).
+		Uint16("port", p.Port())
+
 }
 
 // Equal reports whether p and x are the same.
diff --git a/bittorrent/params.go b/bittorrent/params.go
index 61dc425..964c884 100644
--- a/bittorrent/params.go
+++ b/bittorrent/params.go
@@ -6,7 +6,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/sot-tech/mochi/pkg/log"
+	"github.com/rs/zerolog"
 )
 
 // Params is used to fetch (optional) request parameters from an Announce.
@@ -31,6 +31,8 @@ type Params interface {
 	// For a request of the form "/announce?port=1234" this would return
 	// "port=1234"
 	RawQuery() string
+
+	zerolog.LogObjectMarshaler
 }
 
 var (
@@ -151,7 +153,6 @@ func parseQuery(query string) (q *QueryParams, err error) {
 			// But frontends record these errors to prometheus, which generates
 			// a lot of time series.
 			// We log it here for debugging instead.
-			log.Debug("failed to unescape query param key", log.Err(err))
 			return nil, ErrInvalidQueryEscape
 		}
 		value, err = url.QueryUnescape(value)
@@ -160,7 +161,6 @@ func parseQuery(query string) (q *QueryParams, err error) {
 			// But frontends record these errors to prometheus, which generates
 			// a lot of time series.
 			// We log it here for debugging instead.
-			log.Debug("failed to unescape query param value", log.Err(err))
 			return nil, ErrInvalidQueryEscape
 		}
 
@@ -210,3 +210,7 @@ func (qp *QueryParams) RawPath() string {
 func (qp *QueryParams) RawQuery() string {
 	return qp.query
 }
+
+func (qp QueryParams) MarshalZerologObject(e *zerolog.Event) {
+	e.Str("path", qp.path).Str("query", qp.query)
+}
diff --git a/bittorrent/request.go b/bittorrent/request.go
index a095109..d76294d 100644
--- a/bittorrent/request.go
+++ b/bittorrent/request.go
@@ -6,7 +6,7 @@ import (
 	"sort"
 	"time"
 
-	"github.com/sot-tech/mochi/pkg/log"
+	"github.com/rs/zerolog"
 )
 
 // RequestAddress wrapper for netip.Addr with Provided flag.
@@ -16,6 +16,10 @@ type RequestAddress struct {
 	Provided bool
 }
 
+func (a RequestAddress) MarshalZerologObject(e *zerolog.Event) {
+	e.Stringer("address", a.Addr).Bool("provided", a.Provided)
+}
+
 // Validate checks if netip.Addr is valid and not unspecified (0.0.0.0)
 func (a RequestAddress) Validate() bool {
 	return a.IsValid() && !a.IsUnspecified()
@@ -38,6 +42,12 @@ func (a RequestAddress) String() string {
 // connection information about peer
 type RequestAddresses []RequestAddress
 
+func (aa RequestAddresses) MarshalZerologArray(a *zerolog.Array) {
+	for _, addr := range aa {
+		a.Object(addr)
+	}
+}
+
 func (aa RequestAddresses) Len() int {
 	return len(aa)
 }
@@ -89,6 +99,14 @@ func (aa RequestAddresses) GetFirst() netip.Addr {
 	return a
 }
 
+type Peers []Peer
+
+func (p Peers) MarshalZerologArray(a *zerolog.Array) {
+	for _, peer := range p {
+		a.Object(peer)
+	}
+}
+
 // RequestPeer is bundle of peer ID, provided or
 // determined addresses and net port
 type RequestPeer struct {
@@ -97,9 +115,15 @@ type RequestPeer struct {
 	RequestAddresses
 }
 
+func (rp RequestPeer) MarshalZerologObject(e *zerolog.Event) {
+	e.Stringer("id", rp.ID).
+		Array("addresses", rp.RequestAddresses).
+		Uint16("port", rp.Port)
+}
+
 // Peers constructs array of Peer-s with the same ID and Port
 // for every RequestAddress array.
-func (rp RequestPeer) Peers() (peers []Peer) {
+func (rp RequestPeer) Peers() (peers Peers) {
 	for _, a := range rp.RequestAddresses {
 		peers = append(peers, Peer{
 			ID:       rp.ID,
@@ -125,21 +149,18 @@ type AnnounceRequest struct {
 	Params
 }
 
-// LogFields renders the current response as a set of log fields.
-func (r AnnounceRequest) LogFields() log.Fields {
-	return log.Fields{
-		"event":           r.Event,
-		"infoHash":        r.InfoHash,
-		"compact":         r.Compact,
-		"eventProvided":   r.EventProvided,
-		"numWantProvided": r.NumWantProvided,
-		"numWant":         r.NumWant,
-		"left":            r.Left,
-		"downloaded":      r.Downloaded,
-		"uploaded":        r.Uploaded,
-		"peers":           r.RequestPeer,
-		"params":          r.Params,
-	}
+func (r AnnounceRequest) MarshalZerologObject(e *zerolog.Event) {
+	e.Stringer("event", r.Event).
+		Stringer("infoHash", r.InfoHash).
+		Bool("compact", r.Compact).
+		Bool("eventProvided", r.EventProvided).
+		Bool("numWantProvided", r.NumWantProvided).
+		Uint32("numWant", r.NumWant).
+		Uint64("left", r.Left).
+		Uint64("downloaded", r.Downloaded).
+		Uint64("uploaded", r.Uploaded).
+		Object("peers", r.RequestPeer).
+		Object("params", r.Params)
 }
 
 // AnnounceResponse represents the parameters used to create an announce
@@ -150,19 +171,25 @@ type AnnounceResponse struct {
 	Incomplete  uint32
 	Interval    time.Duration
 	MinInterval time.Duration
-	IPv4Peers   []Peer
-	IPv6Peers   []Peer
+	IPv4Peers   Peers
+	IPv6Peers   Peers
 }
 
-// LogFields renders the current response as a set of log fields.
-func (r AnnounceResponse) LogFields() log.Fields {
-	return log.Fields{
-		"compact":     r.Compact,
-		"complete":    r.Complete,
-		"interval":    r.Interval,
-		"minInterval": r.MinInterval,
-		"ipv4Peers":   r.IPv4Peers,
-		"ipv6Peers":   r.IPv6Peers,
+func (r AnnounceResponse) MarshalZerologObject(e *zerolog.Event) {
+	e.Bool("compact", r.Compact).
+		Uint32("complete", r.Complete).
+		Uint32("incomplete", r.Incomplete).
+		Dur("interval", r.Interval).
+		Dur("minInterval", r.MinInterval).
+		Array("ipv4Peers", r.IPv4Peers).
+		Array("ipv6Peers", r.IPv6Peers)
+}
+
+type InfoHashes []InfoHash
+
+func (i InfoHashes) MarshalZerologArray(a *zerolog.Array) {
+	for _, ih := range i {
+		a.Str(ih.String())
 	}
 }
 
@@ -171,16 +198,21 @@ type ScrapeRequest struct {
 	// RequestAddresses not used in internal logic,
 	// but MAY be used in middleware (per-ip block etc.)
 	RequestAddresses
-	InfoHashes []InfoHash
+	InfoHashes InfoHashes
 	Params     Params
 }
 
-// LogFields renders the current response as a set of log fields.
-func (r ScrapeRequest) LogFields() log.Fields {
-	return log.Fields{
-		"ip":         r.RequestAddresses,
-		"infoHashes": r.InfoHashes,
-		"params":     r.Params,
+func (r ScrapeRequest) MarshalZerologObject(e *zerolog.Event) {
+	e.Array("addresses", r.RequestAddresses).
+		Array("infoHashes", r.InfoHashes).
+		Object("params", r.Params)
+}
+
+type Scrapes []Scrape
+
+func (s Scrapes) MarshalZerologArray(a *zerolog.Array) {
+	for _, scrape := range s {
+		a.Object(scrape)
 	}
 }
 
@@ -189,12 +221,9 @@ func (r ScrapeRequest) LogFields() log.Fields {
 // The Scrapes must be in the same order as the InfoHashes in the corresponding
 // ScrapeRequest.
 type ScrapeResponse struct {
-	Files []Scrape
+	Files Scrapes
 }
 
-// LogFields renders the current response as a set of Logrus fields.
-func (sr ScrapeResponse) LogFields() log.Fields {
-	return log.Fields{
-		"files": sr.Files,
-	}
+func (sr ScrapeResponse) MarshalZerologObject(e *zerolog.Event) {
+	e.Array("scrapes", sr.Files)
 }
diff --git a/cmd/mochi/main.go b/cmd/mochi/main.go
index 0a9e05d..ea027b5 100644
--- a/cmd/mochi/main.go
+++ b/cmd/mochi/main.go
@@ -9,7 +9,6 @@ import (
 	"strings"
 	"syscall"
 
-	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 
 	"github.com/sot-tech/mochi/frontend/http"
@@ -55,19 +54,19 @@ func (r *Run) Start(ps storage.PeerStorage) error {
 	r.sg = stop.NewGroup()
 
 	if len(cfg.MetricsAddr) > 0 {
-		log.Info("starting metrics server", log.Fields{"addr": cfg.MetricsAddr})
+		log.Info().Str("addr", cfg.MetricsAddr).Msg("starting metrics server")
 		r.sg.Add(metrics.NewServer(cfg.MetricsAddr))
 	} else {
-		log.Info("metrics disabled because of empty address")
+		log.Info().Msg("metrics disabled because of empty address")
 	}
 
 	if ps == nil {
-		log.Info("starting storage", log.Fields{"name": cfg.Storage.Name})
+		log.Info().Str("name", cfg.Storage.Name).Msg("starting storage")
 		ps, err = storage.NewStorage(cfg.Storage.Name, cfg.Storage.Config)
 		if err != nil {
 			return fmt.Errorf("failed to create storage: %w", err)
 		}
-		log.Info("started storage", ps)
+		log.Info().Object("config", ps).Msg("started storage")
 	}
 	r.storage = ps
 
@@ -83,7 +82,7 @@ func (r *Run) Start(ps storage.PeerStorage) error {
 	r.logic = middleware.NewLogic(cfg.AnnounceInterval, cfg.MinAnnounceInterval, r.storage, preHooks, postHooks)
 
 	if len(cfg.HTTPConfig) > 0 {
-		log.Info("starting HTTP frontend", cfg.HTTPConfig)
+		log.Info().Object("config", cfg.HTTPConfig).Msg("starting HTTP frontend")
 		httpFE, err := http.NewFrontend(r.logic, cfg.HTTPConfig)
 		if err == nil {
 			r.sg.Add(httpFE)
@@ -93,7 +92,7 @@ func (r *Run) Start(ps storage.PeerStorage) error {
 	}
 
 	if len(cfg.UDPConfig) > 0 {
-		log.Info("starting UDP frontend", cfg.UDPConfig)
+		log.Info().Object("config", cfg.HTTPConfig).Msg("starting UDP frontend")
 		udpFE, err := udp.NewFrontend(r.logic, cfg.UDPConfig)
 		if err == nil {
 			r.sg.Add(udpFE)
@@ -116,18 +115,18 @@ func combineErrors(prefix string, errs []error) error {
 
 // Stop shuts down an instance of Conf.
 func (r *Run) Stop(keepPeerStore bool) (storage.PeerStorage, error) {
-	log.Debug("stopping frontends and metrics server")
+	log.Debug().Msg("stopping frontends and metrics server")
 	if errs := r.sg.Stop().Wait(); len(errs) != 0 {
 		return nil, combineErrors("failed while shutting down frontends", errs)
 	}
 
-	log.Debug("stopping logic")
+	log.Debug().Msg("stopping logic")
 	if errs := r.logic.Stop().Wait(); len(errs) != 0 {
 		return nil, combineErrors("failed while shutting down middleware", errs)
 	}
 
 	if !keepPeerStore {
-		log.Debug("stopping peer store")
+		log.Debug().Msg("stopping peer store")
 		if errs := r.storage.Stop().Wait(); len(errs) != 0 {
 			return nil, combineErrors("failed while shutting down peer store", errs)
 		}
@@ -140,7 +139,7 @@ func (r *Run) Stop(keepPeerStore bool) (storage.PeerStorage, error) {
 // RootRunCmdFunc implements a Cobra command that runs an instance of Conf
 // and handles reloading and shutdown via process signals.
 func RootRunCmdFunc(cmd *cobra.Command, _ []string) error {
-	configFilePath, err := cmd.Flags().GetString("config")
+	configFilePath, err := cmd.Flags().GetString(configArg)
 	if err != nil {
 		return err
 	}
@@ -156,7 +155,7 @@ func RootRunCmdFunc(cmd *cobra.Command, _ []string) error {
 	for {
 		select {
 		case <-reload.Done():
-			log.Info("reloading; received reload signal")
+			log.Info().Msg("reloading; received reload signal")
 			peerStore, err := r.Stop(true)
 			if err != nil {
 				return err
@@ -166,7 +165,7 @@ func RootRunCmdFunc(cmd *cobra.Command, _ []string) error {
 				return err
 			}
 		case <-shutdown.Done():
-			log.Info("shutting down; received shutdown signal")
+			log.Info().Msg("shutting down; received shutdown signal")
 			if _, err := r.Stop(false); err != nil {
 				return err
 			}
@@ -176,56 +175,60 @@ func RootRunCmdFunc(cmd *cobra.Command, _ []string) error {
 	}
 }
 
-// RootPreRunCmdFunc handles command line flags for the Run command.
-func RootPreRunCmdFunc(cmd *cobra.Command, _ []string) error {
-	noColors, err := cmd.Flags().GetBool("nocolors")
+const (
+	appName      = "mochi"
+	logOutArg    = "logOut"
+	logLevelArg  = "logLevel"
+	logPrettyArg = "logPretty"
+	logColorsArg = "logColored"
+	configArg    = "config"
+)
+
+// configureLogger handles command line flags for the logger.
+func configureLogger(cmd *cobra.Command, _ []string) (err error) {
+	var out, lvl string
+	var pretty, colored bool
+
+	flags := cmd.Flags()
+
+	out, err = flags.GetString(logOutArg)
 	if err != nil {
 		return err
 	}
-	if noColors {
-		log.SetFormatter(&logrus.TextFormatter{DisableColors: true})
-	}
 
-	jsonLog, err := cmd.Flags().GetBool("json")
+	lvl, err = flags.GetString(logLevelArg)
 	if err != nil {
 		return err
 	}
-	if jsonLog {
-		log.SetFormatter(&logrus.JSONFormatter{})
-		log.Info("enabled JSON logging")
-	}
 
-	debugLog, err := cmd.Flags().GetBool("debug")
+	pretty, err = flags.GetBool(logPrettyArg)
 	if err != nil {
 		return err
 	}
-	if debugLog {
-		log.SetDebug(true)
-		log.Info("enabled debug logging")
+
+	colored, err = cmd.Flags().GetBool(logColorsArg)
+	if err != nil {
+		return err
 	}
 
-	return nil
-}
-
-// RootPostRunCmdFunc handles clean up of any state initialized by command line
-// flags.
-func RootPostRunCmdFunc(_ *cobra.Command, _ []string) error {
-	return nil
+	return log.ConfigureLogger(out, lvl, pretty, colored)
 }
 
 func main() {
 	rootCmd := &cobra.Command{
-		Use:                "mochi",
-		Short:              "BitTorrent Tracker",
-		Long:               "A customizable, multi-protocol BitTorrent Tracker",
-		PersistentPreRunE:  RootPreRunCmdFunc,
-		RunE:               RootRunCmdFunc,
-		PersistentPostRunE: RootPostRunCmdFunc,
+		Use:               appName,
+		Short:             "BitTorrent Tracker",
+		Long:              "A customizable, multi-protocol BitTorrent Tracker",
+		PersistentPreRunE: configureLogger,
+		RunE:              RootRunCmdFunc,
 	}
 
-	rootCmd.PersistentFlags().Bool("debug", false, "enable debug logging")
-	rootCmd.PersistentFlags().Bool("json", false, "enable json logging")
-	rootCmd.PersistentFlags().Bool("nocolors", runtime.GOOS == "windows", "disable log coloring")
+	flags := rootCmd.PersistentFlags()
+
+	flags.String(logOutArg, "", "output for logging, might be 'stderr', 'stdout' of file path. 'stderr' if not set")
+	flags.String(logLevelArg, "info", "logging level (trace, debug, info, warn, error, fatal, panic). 'warn' if not set")
+	flags.Bool(logPrettyArg, false, "enable log pretty print. used only if 'logOut' set to 'stdout' or 'stderr'. if not set, log outputs json)")
+	flags.Bool(logColorsArg, runtime.GOOS == "windows", "enable log coloring. used only if set 'logPretty'")
 
 	rootCmd.Flags().String("config", "/etc/mochi.yaml", "location of configuration file")
 
@@ -234,6 +237,6 @@ func main() {
 	}
 
 	if err := rootCmd.Execute(); err != nil {
-		log.Fatal("failed when executing root cobra command: " + err.Error())
+		log.Fatal().Err(err).Msg("failed while executing root command")
 	}
 }
diff --git a/frontend/http/frontend.go b/frontend/http/frontend.go
index 656f428..dcb8da9 100644
--- a/frontend/http/frontend.go
+++ b/frontend/http/frontend.go
@@ -20,6 +20,8 @@ import (
 	"github.com/sot-tech/mochi/pkg/stop"
 )
 
+var logger = log.NewLogger("http frontend")
+
 // Config represents all of the configurable options for an HTTP BitTorrent
 // Frontend.
 type Config struct {
@@ -38,29 +40,6 @@ type Config struct {
 	ParseOptions
 }
 
-// LogFields renders the current config as a set of Logrus fields.
-func (cfg Config) LogFields() log.Fields {
-	return log.Fields{
-		"addr":                cfg.Addr,
-		"httpsAddr":           cfg.HTTPSAddr,
-		"readTimeout":         cfg.ReadTimeout,
-		"writeTimeout":        cfg.WriteTimeout,
-		"idleTimeout":         cfg.IdleTimeout,
-		"enableKeepAlive":     cfg.EnableKeepAlive,
-		"tlsCertPath":         cfg.TLSCertPath,
-		"tlsKeyPath":          cfg.TLSKeyPath,
-		"announceRoutes":      cfg.AnnounceRoutes,
-		"scrapeRoutes":        cfg.ScrapeRoutes,
-		"pingRoutes":          cfg.PingRoutes,
-		"enableRequestTiming": cfg.EnableRequestTiming,
-		"allowIPSpoofing":     cfg.AllowIPSpoofing,
-		"realIPHeader":        cfg.RealIPHeader,
-		"maxNumWant":          cfg.MaxNumWant,
-		"defaultNumWant":      cfg.DefaultNumWant,
-		"maxScrapeInfoHashes": cfg.MaxScrapeInfoHashes,
-	}
-}
-
 // Default config constants.
 const (
 	defaultReadTimeout  = 2 * time.Second
@@ -77,20 +56,21 @@ func (cfg Config) Validate() Config {
 
 	if cfg.ReadTimeout <= 0 {
 		validcfg.ReadTimeout = defaultReadTimeout
-		log.Warn("falling back to default configuration", log.Fields{
-			"name":     "http.ReadTimeout",
-			"provided": cfg.ReadTimeout,
-			"default":  validcfg.ReadTimeout,
-		})
+		logger.Warn().
+			Str("name", "http.ReadTimeout").
+			Dur("provided", cfg.ReadTimeout).
+			Dur("default", validcfg.ReadTimeout).
+			Msg("falling back to default configuration")
+
 	}
 
 	if cfg.WriteTimeout <= 0 {
 		validcfg.WriteTimeout = defaultWriteTimeout
-		log.Warn("falling back to default configuration", log.Fields{
-			"name":     "http.WriteTimeout",
-			"provided": cfg.WriteTimeout,
-			"default":  validcfg.WriteTimeout,
-		})
+		logger.Warn().
+			Str("name", "http.WriteTimeout").
+			Dur("provided", cfg.WriteTimeout).
+			Dur("default", validcfg.WriteTimeout).
+			Msg("falling back to default configuration")
 	}
 
 	if cfg.IdleTimeout <= 0 {
@@ -98,11 +78,11 @@ func (cfg Config) Validate() Config {
 
 		if cfg.EnableKeepAlive {
 			// If keepalive is disabled, this configuration isn't used anyway.
-			log.Warn("falling back to default configuration", log.Fields{
-				"name":     "http.IdleTimeout",
-				"provided": cfg.IdleTimeout,
-				"default":  validcfg.IdleTimeout,
-			})
+			logger.Warn().
+				Str("name", "http.IdleTimeout").
+				Dur("provided", cfg.IdleTimeout).
+				Dur("default", validcfg.IdleTimeout).
+				Msg("falling back to default configuration")
 		}
 	}
 
@@ -178,7 +158,7 @@ func NewFrontend(logic frontend.TrackerLogic, c conf.MapConfig) (*Frontend, erro
 	if cfg.Addr != "" {
 		go func() {
 			if err := f.serveHTTP(router, false); err != nil {
-				log.Fatal("failed while serving http", log.Err(err))
+				logger.Fatal().Err(err).Str("proto", "http").Msg("failed while serving")
 			}
 		}()
 	}
@@ -186,7 +166,7 @@ func NewFrontend(logic frontend.TrackerLogic, c conf.MapConfig) (*Frontend, erro
 	if cfg.HTTPSAddr != "" {
 		go func() {
 			if err := f.serveHTTP(router, true); err != nil {
-				log.Fatal("failed while serving https", log.Err(err))
+				logger.Fatal().Err(err).Str("proto", "https").Msg("failed while serving")
 			}
 		}()
 	}
@@ -194,7 +174,7 @@ func NewFrontend(logic frontend.TrackerLogic, c conf.MapConfig) (*Frontend, erro
 	return f, nil
 }
 
-// Stop provides a thread-safe way to shutdown a currently running Frontend.
+// Stop provides a thread-safe way to shut down a currently running Frontend.
 func (f *Frontend) Stop() stop.Result {
 	stopGroup := stop.NewGroup()
 
diff --git a/frontend/http/writer.go b/frontend/http/writer.go
index 79a785e..8b194be 100644
--- a/frontend/http/writer.go
+++ b/frontend/http/writer.go
@@ -9,7 +9,6 @@ import (
 	"github.com/anacrolix/torrent/bencode"
 
 	"github.com/sot-tech/mochi/bittorrent"
-	"github.com/sot-tech/mochi/pkg/log"
 )
 
 // WriteError communicates an error to a BitTorrent client over HTTP.
@@ -19,13 +18,13 @@ func WriteError(w http.ResponseWriter, err error) {
 	if errors.As(err, &clientErr) {
 		message = clientErr.Error()
 	} else {
-		log.Error("http: internal error", log.Err(err))
+		logger.Error().Err(err).Msg("http: internal error")
 	}
 
 	if err = bencode.NewEncoder(w).Encode(map[string]any{
 		"failure reason": message,
 	}); err != nil {
-		log.Error("unable to encode message", log.Err(err))
+		logger.Error().Err(err).Msg("unable to encode message")
 	}
 }
 
diff --git a/frontend/options.go b/frontend/options.go
index 093e6a4..ce5b955 100644
--- a/frontend/options.go
+++ b/frontend/options.go
@@ -2,6 +2,8 @@ package frontend
 
 import "github.com/sot-tech/mochi/pkg/log"
 
+var logger = log.NewLogger("frontend configurator")
+
 // ParseOptions is the configuration used to parse an Announce Request.
 //
 // If AllowIPSpoofing is true, IPs provided via params will be used.
@@ -18,29 +20,29 @@ func (op ParseOptions) Validate() ParseOptions {
 	valid := op
 	if op.MaxNumWant <= 0 {
 		valid.MaxNumWant = defaultMaxNumWant
-		log.Warn("falling back to default configuration", log.Fields{
-			"name":     "MaxNumWant",
-			"provided": op.MaxNumWant,
-			"default":  valid.MaxNumWant,
-		})
+		logger.Warn().
+			Str("name", "MaxNumWant").
+			Uint32("provided", op.MaxNumWant).
+			Uint32("default", valid.MaxNumWant).
+			Msg("falling back to default configuration")
 	}
 
 	if op.DefaultNumWant <= 0 {
 		valid.DefaultNumWant = defaultDefaultNumWant
-		log.Warn("falling back to default configuration", log.Fields{
-			"name":     "DefaultNumWant",
-			"provided": op.DefaultNumWant,
-			"default":  valid.DefaultNumWant,
-		})
+		logger.Warn().
+			Str("name", "DefaultNumWant").
+			Uint32("provided", op.DefaultNumWant).
+			Uint32("default", valid.DefaultNumWant).
+			Msg("falling back to default configuration")
 	}
 
 	if op.MaxScrapeInfoHashes <= 0 {
 		valid.MaxScrapeInfoHashes = defaultMaxScrapeInfoHashes
-		log.Warn("falling back to default configuration", log.Fields{
-			"name":     "MaxScrapeInfoHashes",
-			"provided": op.MaxScrapeInfoHashes,
-			"default":  valid.MaxScrapeInfoHashes,
-		})
+		logger.Warn().
+			Str("name", "MaxScrapeInfoHashes").
+			Uint32("provided", op.MaxScrapeInfoHashes).
+			Uint32("default", valid.MaxScrapeInfoHashes).
+			Msg("falling back to default configuration")
 	}
 	return valid
 }
diff --git a/frontend/udp/connection_id.go b/frontend/udp/connection_id.go
index f8bcd5a..de5df66 100644
--- a/frontend/udp/connection_id.go
+++ b/frontend/udp/connection_id.go
@@ -81,14 +81,22 @@ func (g *ConnectionIDGenerator) Generate(ip netip.Addr, now time.Time) []byte {
 	g.scratch = g.mac.Sum(g.scratch)
 	copy(g.connID[4:8], g.scratch[:4])
 
-	log.Debug("generated connection ID", log.Fields{"ip": ip, "now": now, "connID": g.connID})
+	log.Debug().
+		Stringer("ip", ip).
+		Time("now", now).
+		Bytes("connID", g.connID).
+		Msg("generated connection ID")
 	return g.connID
 }
 
 // Validate validates the given connection ID for an IP and the current time.
 func (g *ConnectionIDGenerator) Validate(connectionID []byte, ip netip.Addr, now time.Time, maxClockSkew time.Duration) bool {
 	ts := time.Unix(int64(binary.BigEndian.Uint32(connectionID[:4])), 0)
-	log.Debug("validating connection ID", log.Fields{"connID": connectionID, "ip": ip, "ts": ts, "now": now})
+	log.Debug().
+		Stringer("ip", ip).
+		Time("ts", ts).Time("now", now).
+		Bytes("connID", g.connID).
+		Msg("validating connection ID")
 	if now.After(ts.Add(ttl)) || ts.After(now.Add(maxClockSkew)) {
 		return false
 	}
diff --git a/frontend/udp/connection_id_test.go b/frontend/udp/connection_id_test.go
index edc44b2..90f1022 100644
--- a/frontend/udp/connection_id_test.go
+++ b/frontend/udp/connection_id_test.go
@@ -57,7 +57,11 @@ func simpleNewConnectionID(ip netip.Addr, now time.Time, key string) []byte {
 
 	// this is just in here because logging impacts performance and we benchmark
 	// this version too.
-	log.Debug("manually generated connection ID", log.Fields{"ip": ip, "now": now, "connID": buf})
+	log.Debug().
+		Stringer("ip", ip).
+		Time("now", now).
+		Bytes("connID", buf).
+		Msg("manually generated connection ID")
 	return buf
 }
 
diff --git a/frontend/udp/frontend.go b/frontend/udp/frontend.go
index 4d4451b..724719e 100644
--- a/frontend/udp/frontend.go
+++ b/frontend/udp/frontend.go
@@ -23,6 +23,8 @@ import (
 	"github.com/sot-tech/mochi/pkg/timecache"
 )
 
+var logger = log.NewLogger("udp frontend")
+
 var allowedGeneratedPrivateKeyRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890")
 
 // Config represents all of the configurable options for a UDP BitTorrent
@@ -35,20 +37,6 @@ type Config struct {
 	frontend.ParseOptions
 }
 
-// LogFields renders the current config as a set of Logrus fields.
-func (cfg Config) LogFields() log.Fields {
-	return log.Fields{
-		"addr":                cfg.Addr,
-		"privateKey":          cfg.PrivateKey,
-		"maxClockSkew":        cfg.MaxClockSkew,
-		"enableRequestTiming": cfg.EnableRequestTiming,
-		"allowIPSpoofing":     cfg.AllowIPSpoofing,
-		"maxNumWant":          cfg.MaxNumWant,
-		"defaultNumWant":      cfg.DefaultNumWant,
-		"maxScrapeInfoHashes": cfg.MaxScrapeInfoHashes,
-	}
-}
-
 // Validate sanity checks values set in a config and returns a new config with
 // default values replacing anything that is invalid.
 //
@@ -64,7 +52,11 @@ func (cfg Config) Validate() Config {
 		}
 		validcfg.PrivateKey = string(pkeyRunes)
 
-		log.Warn("UDP private key was not provided, using generated key", log.Fields{"key": validcfg.PrivateKey})
+		log.Warn().
+			Str("name", "UDP.PrivateKey").
+			Str("provided", "").
+			Str("key", validcfg.PrivateKey).
+			Msg("falling back to default configuration")
 	}
 
 	validcfg.ParseOptions = cfg.ParseOptions.Validate()
@@ -111,7 +103,7 @@ func NewFrontend(logic frontend.TrackerLogic, c conf.MapConfig) (*Frontend, erro
 	f.wg.Add(1)
 	go func() {
 		if err := f.serve(); err != nil {
-			log.Fatal("failed while serving udp", log.Err(err))
+			logger.Fatal().Err(err).Str("proto", "udp").Msg("failed while serving")
 		}
 	}()
 
@@ -157,7 +149,7 @@ func (t *Frontend) serve() error {
 		// Check to see if we need to shutdown.
 		select {
 		case <-t.closing:
-			log.Debug("udp serve() received shutdown signal")
+			log.Debug().Msg("serve received shutdown signal")
 			return nil
 		default:
 		}
diff --git a/go.mod b/go.mod
index 67b26a7..e36c2fd 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/sot-tech/mochi
 go 1.18
 
 require (
+	code.cloudfoundry.org/go-diodes v0.0.0-20220420211542-53509ccdf174
 	github.com/SermoDigital/jose v0.9.2-0.20180104203859-803625baeddc
 	github.com/anacrolix/torrent v1.42.0
 	github.com/go-redis/redis/v8 v8.11.5
@@ -12,7 +13,8 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.12.1
-	github.com/sirupsen/logrus v1.8.1
+	github.com/rs/zerolog v1.26.1
+	github.com/sirupsen/logrus v1.6.0
 	github.com/spf13/cobra v1.4.0
 	github.com/stretchr/testify v1.7.1
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
@@ -33,6 +35,7 @@ require (
 	github.com/huandu/xstrings v1.3.2 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.0.12 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.3 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_model v0.2.0 // indirect
diff --git a/go.sum b/go.sum
index 55c6f9f..7c765ff 100644
--- a/go.sum
+++ b/go.sum
@@ -30,6 +30,8 @@ cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0Zeo
 cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+code.cloudfoundry.org/go-diodes v0.0.0-20220420211542-53509ccdf174 h1:Ht2zKWftukU3F3ACIdE8asNhso3DgHPzaCDO2K5SWmA=
+code.cloudfoundry.org/go-diodes v0.0.0-20220420211542-53509ccdf174/go.mod h1:HLP7HKUU1eqMAGMk247yT91tDDi4xxnehkyXh6hGcr0=
 crawshaw.io/iox v0.0.0-20181124134642-c51c3df30797/go.mod h1:sXBiorCo8c46JlQV3oXPKINnZ8mcqnye1EkVkqsectk=
 crawshaw.io/sqlite v0.3.2/go.mod h1:igAO5JulrQ1DbdZdtVq48mnZUBAPOeFzer7VhDWNtW4=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
@@ -92,6 +94,7 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5P
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
+github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -133,6 +136,7 @@ github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KE
 github.com/go-redis/redis/v8 v8.11.5 h1:AcZZR7igkdvfVmQTPnu9WE37LRrO/YrBH5zWyjDC0oI=
 github.com/go-redis/redis/v8 v8.11.5/go.mod h1:gREzHqY1hg6oD9ngVRbLStwAWKhA0FEgq8Jd4h5lpwo=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
@@ -226,6 +230,7 @@ github.com/klauspost/cpuid/v2 v2.0.4/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa02
 github.com/klauspost/cpuid/v2 v2.0.12 h1:p9dKCg8i4gmOxtv35DvrYoWqYzQrvEVdjQ762Y0OqZE=
 github.com/klauspost/cpuid/v2 v2.0.12/go.mod h1:g2LTdtYhdyuGPqyWyv7qRAmj1WBqxuObKfj5c0PQa7c=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
@@ -257,7 +262,7 @@ github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
 github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
 github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-github.com/onsi/gomega v1.18.1 h1:M1GfJqGRrBrrGGsbxzV5dqM2U2ApXefZCQpkukxYRLE=
+github.com/onsi/gomega v1.19.0 h1:4ieX6qQjPP/BfC3mpsAtIGGlxTWPeA3Inl/7DtXw1tw=
 github.com/openzipkin/zipkin-go v0.1.6/go.mod h1:QgAqvLzwWbR/WpD4A3cGpPtJrZXNIiJc5AZX7/PBEpw=
 github.com/philhofer/fwd v1.0.0/go.mod h1:gk3iGcWd9+svBvR0sR+KPcfE+RNWozjowpeBVG3ZVNU=
 github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
@@ -304,13 +309,15 @@ github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFR
 github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
 github.com/rogpeppe/go-internal v1.8.0 h1:FCbCCtXNOY3UtUuHUYaghJg4y7Fd14rXifAYUAtL9R8=
 github.com/rogpeppe/go-internal v1.8.0/go.mod h1:WmiCO8CzOY8rg0OYDC4/i/2WRWAB6poM+XZ2dLUbcbE=
+github.com/rs/xid v1.3.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
+github.com/rs/zerolog v1.26.1 h1:/ihwxqH+4z8UxyI70wM1z9yCvkWcfz/a3mj48k/Zngc=
+github.com/rs/zerolog v1.26.1/go.mod h1:/wSSJWX7lVrsOwlbyTRSOJvqRlc+WjWlfes+CiJ+tmc=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/ryszard/goskiplist v0.0.0-20150312221310-2dfbae5fcf46/go.mod h1:uAQ5PCi+MFsC7HjREoAz1BU+Mq60+05gifQSsHSDG/8=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
+github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
-github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
-github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/assertions v0.0.0-20190215210624-980c5ac6f3ac/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/goconvey v0.0.0-20181108003508-044398e4856c/go.mod h1:XDJAKZRPZ1CvBcN2aX5YOUTYGHki24fSF0Iv48Ibg0s=
@@ -336,6 +343,7 @@ github.com/willf/bitset v1.1.10/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPy
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.20.2/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
@@ -349,6 +357,7 @@ golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20211215165025-cf75a172585e/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -379,6 +388,7 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -409,7 +419,9 @@ golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f h1:oA4XRj0qtSt8Yo1Zms0CUlsT3KG69V2UGQWPBxujDmc=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
@@ -429,6 +441,7 @@ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -444,7 +457,6 @@ golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -470,6 +482,7 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220422013727-9388b58f7150 h1:xHms4gcpe1YE7A3yIllJXP16CMAGuqwO2lX1mTyyRRc=
@@ -528,6 +541,7 @@ golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roY
 golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
+golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/middleware/jwt/jwt.go b/middleware/jwt/jwt.go
index 9ad1683..6875968 100644
--- a/middleware/jwt/jwt.go
+++ b/middleware/jwt/jwt.go
@@ -14,7 +14,6 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
-	"strings"
 	"time"
 
 	jc "github.com/SermoDigital/jose/crypto"
@@ -38,11 +37,18 @@ func init() {
 }
 
 var (
+	logger = log.NewLogger(Name)
 	// ErrMissingJWT is returned when a JWT is missing from a request.
 	ErrMissingJWT = bittorrent.ClientError("unapproved request: missing jwt")
 
 	// ErrInvalidJWT is returned when a JWT fails to verify.
 	ErrInvalidJWT = bittorrent.ClientError("unapproved request: invalid jwt")
+
+	errInvalidInfoHashClaim = errors.New("claim \"infohash\" is invalid")
+
+	errInvalidKid = errors.New("invalid kid")
+
+	errUnknownKidSigner = errors.New("signed by unknown kid")
 )
 
 // Config represents all the values required by this middleware to fetch JWKs
@@ -54,16 +60,6 @@ type Config struct {
 	JWKUpdateInterval time.Duration `cfg:"jwk_set_update_interval"`
 }
 
-// LogFields implements log.Fielder for a Config.
-func (cfg Config) LogFields() log.Fields {
-	return log.Fields{
-		"issuer":            cfg.Issuer,
-		"audience":          cfg.Audience,
-		"JWKSetURL":         cfg.JWKSetURL,
-		"JWKUpdateInterval": cfg.JWKUpdateInterval,
-	}
-}
-
 type hook struct {
 	cfg        Config
 	publicKeys map[string]crypto.PublicKey
@@ -77,14 +73,14 @@ func build(options conf.MapConfig, _ storage.PeerStorage) (middleware.Hook, erro
 		return nil, fmt.Errorf("middleware %s: %w", Name, err)
 	}
 
-	log.Debug("creating new JWT middleware", options)
+	logger.Debug().Object("options", options).Msg("creating new JWT middleware")
 	h := &hook{
 		cfg:        cfg,
 		publicKeys: map[string]crypto.PublicKey{},
 		closing:    make(chan struct{}),
 	}
 
-	log.Debug("performing initial fetch of JWKs")
+	logger.Debug().Msg("performing initial fetch of JWKs")
 	if err := h.updateKeys(); err != nil {
 		return nil, fmt.Errorf("failed to fetch initial JWK Set: %w", err)
 	}
@@ -95,7 +91,7 @@ func build(options conf.MapConfig, _ storage.PeerStorage) (middleware.Hook, erro
 			case <-h.closing:
 				return
 			case <-time.After(cfg.JWKUpdateInterval):
-				log.Debug("performing fetch of JWKs")
+				logger.Debug().Msg("performing fetch of JWKs")
 				_ = h.updateKeys()
 			}
 		}
@@ -107,14 +103,14 @@ func build(options conf.MapConfig, _ storage.PeerStorage) (middleware.Hook, erro
 func (h *hook) updateKeys() error {
 	resp, err := http.Get(h.cfg.JWKSetURL)
 	if err != nil {
-		log.Error("failed to fetch JWK Set", log.Err(err))
+		logger.Error().Err(err).Msg("failed to fetch JWK Set")
 		return err
 	}
 	defer resp.Body.Close()
 	var parsedJWKs gojwk.Key
 	err = json.NewDecoder(resp.Body).Decode(&parsedJWKs)
 	if err != nil {
-		log.Error("failed to decode JWK JSON", log.Err(err))
+		logger.Error().Err(err).Msg("failed to decode JWK JSON")
 		return err
 	}
 
@@ -122,19 +118,19 @@ func (h *hook) updateKeys() error {
 	for _, parsedJWK := range parsedJWKs.Keys {
 		publicKey, err := parsedJWK.DecodePublicKey()
 		if err != nil {
-			log.Error("failed to decode JWK into public key", log.Err(err))
+			logger.Error().Err(err).Msg("failed to decode JWK into public key")
 			return err
 		}
 		keys[parsedJWK.Kid] = publicKey
 	}
 	h.publicKeys = keys
 
-	log.Debug("successfully fetched JWK Set")
+	logger.Debug().Msg("successfully fetched JWK Set")
 	return nil
 }
 
 func (h *hook) Stop() stop.Result {
-	log.Debug("attempting to shutdown JWT middleware")
+	logger.Debug().Msg("attempting to shutdown JWT middleware")
 	select {
 	case <-h.closing:
 		return stop.AlreadyStopped
@@ -178,53 +174,51 @@ func validateJWT(ih bittorrent.InfoHash, jwtBytes []byte, cfgIss, cfgAud string,
 
 	claims := parsedJWT.Claims()
 	if iss, ok := claims.Issuer(); !ok || iss != cfgIss {
-		log.Debug("unequal or missing issuer when validating JWT", log.Fields{
-			"exists": ok,
-			"claim":  iss,
-			"config": cfgIss,
-		})
+		logger.Debug().
+			Bool("exists", ok).
+			Str("claim", iss).
+			Str("config", cfgIss).
+			Msg("unequal or missing issuer when validating JWT")
 		return jwt.ErrInvalidISSClaim
 	}
 
 	if auds, ok := claims.Audience(); !ok || !in(cfgAud, auds) {
-		log.Debug("unequal or missing audience when validating JWT", log.Fields{
-			"exists": ok,
-			"claim":  strings.Join(auds, ","),
-			"config": cfgAud,
-		})
+		logger.Debug().
+			Bool("exists", ok).
+			Strs("claim", auds).
+			Str("config", cfgAud).
+			Msg("unequal or missing audience when validating JWT")
 		return jwt.ErrInvalidAUDClaim
 	}
 
 	ihHex := hex.EncodeToString([]byte(ih))
 	if ihClaim, ok := claims.Get("infohash").(string); !ok || ihClaim != ihHex {
-		log.Debug("unequal or missing infohash when validating JWT", log.Fields{
-			"exists":  ok,
-			"claim":   ihClaim,
-			"request": ihHex,
-		})
-		return errors.New("claim \"infohash\" is invalid")
+		logger.Debug().
+			Bool("exists", ok).
+			Str("claim", ihClaim).
+			Str("request", ihHex).
+			Msg("unequal or missing infohash when validating JWT")
+		return errInvalidInfoHashClaim
 	}
 
 	parsedJWS := parsedJWT.(jws.JWS)
 	kid, ok := parsedJWS.Protected().Get("kid").(string)
 	if !ok {
-		log.Debug("missing kid when validating JWT", log.Fields{
-			"exists": ok,
-			"claim":  kid,
-		})
-		return errors.New("invalid kid")
+		logger.Debug().
+			Bool("exists", ok).
+			Str("claim", kid).
+			Msg("missing kid when validating JWT")
+		return errInvalidKid
 	}
 	publicKey, ok := publicKeys[kid]
 	if !ok {
-		log.Debug("missing public key forkid when validating JWT", log.Fields{
-			"kid": kid,
-		})
-		return errors.New("signed by unknown kid")
+		logger.Debug().Str("claim", kid).Msg("missing public key forkid when validating JWT")
+		return errUnknownKidSigner
 	}
 
 	err = parsedJWS.Verify(publicKey, jc.SigningMethodRS256)
 	if err != nil {
-		log.Debug("failed to verify signature of JWT", log.Err(err))
+		logger.Debug().Err(err).Msg("failed to verify signature of JWT")
 		return err
 	}
 
diff --git a/middleware/logic.go b/middleware/logic.go
index 0219012..8319f52 100644
--- a/middleware/logic.go
+++ b/middleware/logic.go
@@ -11,7 +11,10 @@ import (
 	"github.com/sot-tech/mochi/storage"
 )
 
-var _ frontend.TrackerLogic = &Logic{}
+var (
+	logger                       = log.NewLogger("middleware")
+	_      frontend.TrackerLogic = &Logic{}
+)
 
 // NewLogic creates a new instance of a TrackerLogic that executes the provided
 // middleware hooks.
@@ -46,7 +49,7 @@ func (l *Logic) HandleAnnounce(ctx context.Context, req *bittorrent.AnnounceRequ
 		}
 	}
 
-	log.Debug("generated announce response", resp)
+	logger.Debug().Object("response", resp).Msg("generated announce response")
 	return ctx, resp, nil
 }
 
@@ -56,7 +59,10 @@ func (l *Logic) AfterAnnounce(ctx context.Context, req *bittorrent.AnnounceReque
 	var err error
 	for _, h := range l.postHooks {
 		if ctx, err = h.HandleAnnounce(ctx, req, resp); err != nil {
-			log.Error("post-announce hooks failed", log.Err(err))
+			logger.Error().Err(err).
+				Object("request", req).
+				Object("response", resp).
+				Msg("post-announce hooks failed")
 			return
 		}
 	}
@@ -73,7 +79,7 @@ func (l *Logic) HandleScrape(ctx context.Context, req *bittorrent.ScrapeRequest)
 		}
 	}
 
-	log.Debug("generated scrape response", resp)
+	logger.Debug().Object("response", resp).Msg("generated scrape response")
 	return ctx, resp, nil
 }
 
@@ -83,7 +89,11 @@ func (l *Logic) AfterScrape(ctx context.Context, req *bittorrent.ScrapeRequest,
 	var err error
 	for _, h := range l.postHooks {
 		if ctx, err = h.HandleScrape(ctx, req, resp); err != nil {
-			log.Error("post-scrape hooks failed", log.Err(err))
+			logger.Error().
+				Err(err).
+				Object("request", req).
+				Object("response", resp).
+				Msg("post-scrape hooks failed")
 			return
 		}
 	}
diff --git a/middleware/torrentapproval/container/directory/directory.go b/middleware/torrentapproval/container/directory/directory.go
index 82c88f8..365bc67 100644
--- a/middleware/torrentapproval/container/directory/directory.go
+++ b/middleware/torrentapproval/container/directory/directory.go
@@ -23,6 +23,8 @@ import (
 // Name of this container for registry
 const Name = "directory"
 
+var logger = log.NewLogger("torrent approval directory")
+
 func init() {
 	container.Register(Name, build)
 }
diff --git a/pkg/conf/decoder.go b/pkg/conf/decoder.go
index 10321b9..0702b03 100644
--- a/pkg/conf/decoder.go
+++ b/pkg/conf/decoder.go
@@ -6,8 +6,7 @@ import (
 	"errors"
 
 	"github.com/mitchellh/mapstructure"
-
-	"github.com/sot-tech/mochi/pkg/log"
+	"github.com/rs/zerolog"
 )
 
 // TagName is a tag name, used for decoder customization
@@ -20,9 +19,8 @@ var ErrNilConfigMap = errors.New("unable to process nil map")
 // MapConfig is just alias for map[string]any
 type MapConfig map[string]any
 
-// LogFields just returns this map as a set of Logrus fields.
-func (m MapConfig) LogFields() log.Fields {
-	return log.Fields(m)
+func (m MapConfig) MarshalZerologObject(e *zerolog.Event) {
+	e.Fields(map[string]any(m))
 }
 
 // Unmarshal decodes receiver map into provided structure.
diff --git a/pkg/log/log.go b/pkg/log/log.go
index a32e69f..1ccd2dd 100644
--- a/pkg/log/log.go
+++ b/pkg/log/log.go
@@ -3,132 +3,78 @@
 package log
 
 import (
-	"fmt"
 	"io"
+	"os"
+	"strings"
+	"time"
 
-	"github.com/sirupsen/logrus"
+	_ "code.cloudfoundry.org/go-diodes"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/diode"
+	zl "github.com/rs/zerolog/log"
 )
 
-var (
-	l     = logrus.New()
-	debug = false
-)
+var root = zl.Logger
 
-// SetDebug controls debug logging.
-func SetDebug(to bool) {
-	debug = to
-	l.Level = logrus.DebugLevel
-}
+func ConfigureLogger(output, level string, formatted, colored bool) (err error) {
+	lvl := zerolog.WarnLevel
+	output = strings.ToLower(output)
+	var w io.Writer
+	var stdAny bool
+	switch output {
+	case "stderr", "":
+		w, stdAny = os.Stderr, true
+	case "stdout":
+		w, stdAny = os.Stdout, true
+	default:
+		if w, err = os.OpenFile(output, os.O_APPEND|os.O_CREATE, 0600); err == nil {
+			w = diode.NewWriter(w, 1000, 10*time.Millisecond, func(missed int) {
+				zl.Warn().Int("count", missed).Msg("Logger dropped messages")
+			})
 
-// SetFormatter sets the formatter.
-func SetFormatter(to logrus.Formatter) {
-	l.Formatter = to
-}
-
-// SetOutput sets the output.
-func SetOutput(to io.Writer) {
-	l.Out = to
-}
-
-// Fields is a map of logging fields.
-type Fields map[string]any
-
-// LogFields implements Fielder for Fields.
-func (f Fields) LogFields() Fields {
-	return f
-}
-
-// A Fielder provides Fields via the LogFields method.
-type Fielder interface {
-	LogFields() Fields
-}
-
-// err is a wrapper around an error.
-type err struct {
-	e error
-}
-
-// LogFields provides Fields for logging.
-func (e err) LogFields() Fields {
-	return Fields{
-		"error": e.e.Error(),
-		"type":  fmt.Sprintf("%T", e.e),
-	}
-}
-
-// Err is a wrapper around errors that implements Fielder.
-func Err(e error) Fielder {
-	return err{e}
-}
-
-// mergeFielders merges the Fields of multiple Fielders.
-// Fields from the first Fielder will be used unchanged, Fields from subsequent
-// Fielders will be prefixed with "%d.", starting from 1.
-//
-// must be called with len(fielders) > 0
-func mergeFielders(fielders ...Fielder) logrus.Fields {
-	if fielders[0] == nil {
-		return nil
-	}
-
-	fields := fielders[0].LogFields()
-	for i := 1; i < len(fielders); i++ {
-		if fielders[i] == nil {
-			continue
-		}
-		prefix := fmt.Sprint(i, ".")
-		ff := fielders[i].LogFields()
-		for k, v := range ff {
-			fields[prefix+k] = v
-		}
-	}
-
-	return logrus.Fields(fields)
-}
-
-// Debug logs at the debug level if debug logging is enabled.
-func Debug(v any, fielders ...Fielder) {
-	if debug {
-		if len(fielders) != 0 {
-			l.WithFields(mergeFielders(fielders...)).Debug(v)
 		} else {
-			l.Debug(v)
+			return err
 		}
 	}
+	if stdAny && formatted {
+		w = zerolog.ConsoleWriter{
+			Out:        w,
+			NoColor:    !colored,
+			TimeFormat: "2006-01-02 15:04:05.999",
+		}
+	}
+	if len(level) > 0 {
+		if logLevel, err := zerolog.ParseLevel(strings.ToLower(level)); err == nil {
+			lvl = logLevel
+		} else {
+			return err
+		}
+	}
+	root = zerolog.New(w).With().Timestamp().Logger()
+	zerolog.SetGlobalLevel(lvl)
+	return nil
 }
 
-// Info logs at the info level.
-func Info(v any, fielders ...Fielder) {
-	if len(fielders) != 0 {
-		l.WithFields(mergeFielders(fielders...)).Info(v)
-	} else {
-		l.Info(v)
-	}
+func Debug() *zerolog.Event {
+	return root.Debug()
 }
 
-// Warn logs at the warning level.
-func Warn(v any, fielders ...Fielder) {
-	if len(fielders) != 0 {
-		l.WithFields(mergeFielders(fielders...)).Warn(v)
-	} else {
-		l.Warn(v)
-	}
+func Info() *zerolog.Event {
+	return root.Info()
 }
 
-// Error logs at the error level.
-func Error(v any, fielders ...Fielder) {
-	if len(fielders) != 0 {
-		l.WithFields(mergeFielders(fielders...)).Error(v)
-	} else {
-		l.Error(v)
-	}
+func Warn() *zerolog.Event {
+	return root.Warn()
 }
 
-// Fatal logs at the fatal level and exits with a status code != 0.
-func Fatal(v any, fielders ...Fielder) {
-	if len(fielders) != 0 {
-		l.WithFields(mergeFielders(fielders...)).Fatal(v)
-	} else {
-		l.Fatal(v)
-	}
+func Error() *zerolog.Event {
+	return root.Error()
+}
+
+func Fatal() *zerolog.Event {
+	return root.Fatal()
+}
+
+func NewLogger(component string) zerolog.Logger {
+	return root.With().Str("component", component).Logger()
 }
diff --git a/storage/keydb/storage.go b/storage/keydb/storage.go
index 07eb4c7..0d05199 100644
--- a/storage/keydb/storage.go
+++ b/storage/keydb/storage.go
@@ -167,7 +167,7 @@ func (s store) AnnouncePeers(ih bittorrent.InfoHash, seeder bool, numWant int, v
 
 // ScrapeSwarm is the same function as redis.ScrapeSwarm except `SCard` call instead of `HLen`
 func (s store) ScrapeSwarm(ih bittorrent.InfoHash) (leechers uint32, seeders uint32, snatched uint32) {
-	log.Debug("storage: KeyDB ScrapeSwarm", log.Fields{
+	log.Debug("storage: KeyDB: ScrapeSwarm", log.Fields{
 		"infoHash": ih,
 	})
 	leechers, seeders = s.CountPeers(ih, s.SCard)
diff --git a/storage/storage.go b/storage/storage.go
index 37036e9..ef403ca 100644
--- a/storage/storage.go
+++ b/storage/storage.go
@@ -7,6 +7,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/rs/zerolog"
+
 	"github.com/sot-tech/mochi/bittorrent"
 	"github.com/sot-tech/mochi/pkg/conf"
 	"github.com/sot-tech/mochi/pkg/log"
@@ -20,6 +22,7 @@ const (
 )
 
 var (
+	logger   = log.NewLogger("storage configurator")
 	driversM sync.RWMutex
 	drivers  = make(map[string]Builder)
 )
@@ -38,21 +41,21 @@ type Config struct {
 func (c Config) sanitizeGCConfig() (gcInterval, peerTTL time.Duration) {
 	if c.GarbageCollectionInterval <= 0 {
 		gcInterval = defaultGarbageCollectionInterval
-		log.Warn("falling back to default configuration", log.Fields{
-			"name":     "GarbageCollectionInterval",
-			"provided": c.GarbageCollectionInterval,
-			"default":  defaultGarbageCollectionInterval,
-		})
+		logger.Warn().
+			Str("name", "GarbageCollectionInterval").
+			Dur("provided", c.GarbageCollectionInterval).
+			Dur("default", defaultGarbageCollectionInterval).
+			Msg("falling back to default configuration")
 	} else {
 		gcInterval = c.GarbageCollectionInterval
 	}
 	if c.PeerLifetime <= 0 {
 		peerTTL = defaultPeerLifetime
-		log.Warn("falling back to default configuration", log.Fields{
-			"name":     "PeerLifetime",
-			"provided": c.PeerLifetime,
-			"default":  defaultPeerLifetime,
-		})
+		logger.Warn().
+			Str("name", "PeerLifetime").
+			Dur("provided", c.PeerLifetime).
+			Dur("default", defaultPeerLifetime).
+			Msg("falling back to default configuration")
 	} else {
 		peerTTL = c.PeerLifetime
 	}
@@ -62,11 +65,12 @@ func (c Config) sanitizeGCConfig() (gcInterval, peerTTL time.Duration) {
 func (c Config) sanitizeStatisticsConfig() (statInterval time.Duration) {
 	if c.PrometheusReportingInterval < 0 {
 		statInterval = defaultPrometheusReportingInterval
-		log.Warn("falling back to default configuration", log.Fields{
-			"name":     "PrometheusReportingInterval",
-			"provided": c.PrometheusReportingInterval,
-			"default":  defaultPrometheusReportingInterval,
-		})
+		logger.Warn().
+			Str("name", "PrometheusReportingInterval").
+			Dur("provided", c.PrometheusReportingInterval).
+			Dur("default", defaultPrometheusReportingInterval).
+			Msg("falling back to default configuration")
+
 	}
 	return
 }
@@ -207,9 +211,9 @@ type PeerStorage interface {
 	// For more details see the documentation in the stop package.
 	stop.Stopper
 
-	// Fielder returns a loggable version of the data used to configure and
+	// LogObjectMarshaler returns a loggable version of the data used to configure and
 	// operate a particular PeerStorage.
-	log.Fielder
+	zerolog.LogObjectMarshaler
 }
 
 // RegisterBuilder makes a Builder available by the provided name.
@@ -266,7 +270,7 @@ func NewStorage(name string, cfg conf.MapConfig) (ps PeerStorage, err error) {
 			st.ScheduleStatisticsCollection(statInterval)
 		}
 	} else {
-		log.Info("prometheus disabled because of zero reporting interval")
+		logger.Info().Msg("prometheus disabled because of zero reporting interval")
 	}
 
 	return