From d17526f8ac0c5fa2d60fe12f8e25d20094fcd542 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Tue, 11 May 2021 11:17:45 +0300
Subject: [PATCH] [#493] logger: Abolish non-usable options

Change logger's encoding to `console`, time encoding to `ISO8601TimeEncoder`
and leave all other options as they are in `zap.NewProductionConfig`.

Remove default values of no longer existing options in node/ir config.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 cmd/neofs-ir/defaults.go  |  5 ----
 cmd/neofs-node/config.go  | 10 +-------
 pkg/util/logger/logger.go | 49 ++++-----------------------------------
 3 files changed, 5 insertions(+), 59 deletions(-)

diff --git a/cmd/neofs-ir/defaults.go b/cmd/neofs-ir/defaults.go
index 53bc85197..c245654bc 100644
--- a/cmd/neofs-ir/defaults.go
+++ b/cmd/neofs-ir/defaults.go
@@ -34,11 +34,6 @@ func newConfig(path string) (*viper.Viper, error) {
 
 func defaultConfiguration(cfg *viper.Viper) {
 	cfg.SetDefault("logger.level", "info")
-	cfg.SetDefault("logger.format", "console")
-	cfg.SetDefault("logger.trace_level", "fatal")
-	cfg.SetDefault("logger.no_disclaimer", false)
-	cfg.SetDefault("logger.sampling.initial", 1000)
-	cfg.SetDefault("logger.sampling.thereafter", 1000)
 
 	cfg.SetDefault("pprof.enabled", false)
 	cfg.SetDefault("pprof.address", ":6060")
diff --git a/cmd/neofs-node/config.go b/cmd/neofs-node/config.go
index c7bc59a5a..af244d3e1 100644
--- a/cmd/neofs-node/config.go
+++ b/cmd/neofs-node/config.go
@@ -52,11 +52,7 @@ import (
 
 const (
 	// logger keys
-	cfgLogLevel              = "logger.level"
-	cfgLogFormat             = "logger.format"
-	cfgLogTrace              = "logger.trace_level"
-	cfgLogInitSampling       = "logger.sampling.initial"
-	cfgLogThereafterSampling = "logger.sampling.thereafter"
+	cfgLogLevel = "logger.level"
 
 	// pprof keys
 	cfgProfilerEnable = "pprof.enabled"
@@ -490,10 +486,6 @@ func defaultConfiguration(v *viper.Viper) {
 	v.SetDefault(cfgNetmapWorkerPoolSize, 10)
 
 	v.SetDefault(cfgLogLevel, "info")
-	v.SetDefault(cfgLogFormat, "console")
-	v.SetDefault(cfgLogTrace, "fatal")
-	v.SetDefault(cfgLogInitSampling, 1000)
-	v.SetDefault(cfgLogThereafterSampling, 1000)
 
 	v.SetDefault(cfgProfilerEnable, false)
 	v.SetDefault(cfgProfilerAddr, ":6060")
diff --git a/pkg/util/logger/logger.go b/pkg/util/logger/logger.go
index da0de1b0a..7f0da8e9d 100644
--- a/pkg/util/logger/logger.go
+++ b/pkg/util/logger/logger.go
@@ -16,14 +16,6 @@ import (
 // go.uber.org/zap.Logger.
 type Logger = zap.Logger
 
-const (
-	formatJSON    = "json"
-	formatConsole = "console"
-
-	defaultSamplingInitial    = 100
-	defaultSamplingThereafter = 100
-)
-
 // ErrNilLogger is returned by functions that
 // expect a non-nil Logger, but received nil.
 var ErrNilLogger = errors.New("logger is nil")
@@ -31,51 +23,18 @@ var ErrNilLogger = errors.New("logger is nil")
 // NewLogger is a logger's constructor.
 func NewLogger(v *viper.Viper) (*Logger, error) {
 	c := zap.NewProductionConfig()
-
-	c.OutputPaths = []string{"stdout"}
-	c.ErrorOutputPaths = []string{"stdout"}
-
-	if v.IsSet("logger.sampling") {
-		c.Sampling = &zap.SamplingConfig{
-			Initial:    defaultSamplingInitial,
-			Thereafter: defaultSamplingThereafter,
-		}
-
-		if val := v.GetInt("logger.sampling.initial"); val > 0 {
-			c.Sampling.Initial = val
-		}
-
-		if val := v.GetInt("logger.sampling.thereafter"); val > 0 {
-			c.Sampling.Thereafter = val
-		}
-	}
-
-	// logger level
 	c.Level = safeLevel(v.GetString("logger.level"))
-	traceLvl := safeLevel(v.GetString("logger.trace_level"))
-
-	// logger format
-	switch f := v.GetString("logger.format"); strings.ToLower(f) {
-	case formatConsole:
-		c.Encoding = formatConsole
-	default:
-		c.Encoding = formatJSON
-	}
-
-	// logger time
+	c.Encoding = "console"
 	c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
 
 	l, err := c.Build(
-		// enable trace only for current log-level
-		zap.AddStacktrace(traceLvl))
+		// record a stack trace for all messages at or above fatal level
+		zap.AddStacktrace(zap.NewAtomicLevelAt(zap.FatalLevel)),
+	)
 	if err != nil {
 		return nil, err
 	}
 
-	if v.GetBool("logger.no_disclaimer") {
-		return l, nil
-	}
-
 	name := v.GetString("app.name")
 	version := v.GetString("app.version")