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feat: Logger using zerolog (#47)
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* feat: add zerolog (#46)

* feat: add zerolog (#46) - update ExtraKeys and call Clogf

* feat: add zerolog (#46) - add missing ExtraKeys

* feat: add zerolog (#46) - remove unnecessary code, expose ExtraKey

* feat: add zerolog (#46) - Update README, reorganize hook, fix unit tests, remove unnecessary code in CtxLogf

* feat: add zerolog (#46) - Fix unit tests

* feat: add zerolog (#46) - Check spanCtx using IsValid
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@lovung
lovung authored Jan 27, 2024
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54 changes: 54 additions & 0 deletions logging/zerolog/README.md
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# Zerolog + OpenTelemetry + Hezrt

## [Document](https://www.cloudwego.io/docs/hertz/tutorials/observability/open-telemetry/)

## Example

1. See this [example](https://github.com/cloudwego/hertz-examples/tree/main/opentelemetry)
2. Small change in herzt server

```go
import (
// ...

"github.com/cloudwego/hertz/pkg/common/hlog"
hertzZerolog "github.com/hertz-contrib/logger/zerolog"
hertzOtelZerolog "github.com/hertz-contrib/obs-opentelemetry/logging/zerolog"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)

func main() {
// ...

p := provider.NewOpenTelemetryProvider(
provider.WithServiceName(serviceName),
// Support setting ExportEndpoint via environment variables: OTEL_EXPORTER_OTLP_ENDPOINT
provider.WithExportEndpoint("localhost:4317"),
provider.WithInsecure(),
)
defer p.Shutdown(context.Background())

tracer, cfg := hertztracing.NewServerTracer()
h := server.Default(tracer)
h.Use(hertztracing.ServerMiddleware(cfg))

logger := hertzZerolog.New(
hertzZerolog.WithOutput(w), // allows to specify output
hertzZerolog.WithLevel(hlog.LevelInfo), // option with log level
hertzZerolog.WithCaller(), // option with caller
hertzZerolog.WithTimestamp(), // option with timestamp
hertzZerolog.WithFormattedTimestamp(time.RFC3339),
)

log.Logger = logger.Unwrap() // log.Output(w).With().Caller().Logger()
log.Logger = log.Level(zerolog.InfoLevel)

otelLogger := hertzOtelZerolog.NewLogger(hertzOtelZerolog.WithLogger(logger))
log.Logger = otelLogger.Unwrap()
hlog.SetLogger(otelLogger)

// ...
}
```

27 changes: 27 additions & 0 deletions logging/zerolog/go.mod
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module github.com/hertz-contrib/obs-opentelemetry/logging/zerolog

go 1.19

require (
github.com/cloudwego/hertz v0.8.0
github.com/hertz-contrib/logger/zerolog v0.0.0-20231211035138-acc7b4e2984b
github.com/rs/zerolog v1.31.0
github.com/stretchr/testify v1.8.4
go.opentelemetry.io/otel v1.22.0
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.22.0
go.opentelemetry.io/otel/sdk v1.22.0
go.opentelemetry.io/otel/trace v1.22.0
)

require (
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/go-logr/logr v1.4.1 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/kr/text v0.2.0 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-isatty v0.0.19 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
go.opentelemetry.io/otel/metric v1.22.0 // indirect
golang.org/x/sys v0.16.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)
109 changes: 109 additions & 0 deletions logging/zerolog/go.sum
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github.com/bytedance/go-tagexpr/v2 v2.9.2/go.mod h1:5qsx05dYOiUXOUgnQ7w3Oz8BYs2qtM/bJokdLb79wRM=
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github.com/bytedance/mockey v1.2.1/go.mod h1:+Jm/fzWZAuhEDrPXVjDf/jLM2BlLXJkwk94zf2JZ3X4=
github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
github.com/bytedance/sonic v1.8.1/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U=
github.com/bytedance/sonic v1.10.1 h1:7a1wuFXL1cMy7a3f7/VFcEtriuXQnUBhtoVfOZiaysc=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/fsnotify/fsnotify v1.5.4/go.mod h1:OVB6XrOHzAwXMpEM7uPOzcehqUV2UqJxmVXmkdnm1bU=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
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github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
github.com/henrylee2cn/ameda v1.4.8/go.mod h1:liZulR8DgHxdK+MEwvZIylGnmcjzQ6N6f2PlWe7nEO4=
github.com/henrylee2cn/ameda v1.4.10/go.mod h1:liZulR8DgHxdK+MEwvZIylGnmcjzQ6N6f2PlWe7nEO4=
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github.com/hertz-contrib/logger/zerolog v0.0.0-20231211035138-acc7b4e2984b h1:PZsjswxU/8veXL1uPj6vC8Fg36gA4RocVhR0TFK5Qaw=
github.com/hertz-contrib/logger/zerolog v0.0.0-20231211035138-acc7b4e2984b/go.mod h1:GieP9vSEQR5CO5QgJCXy27GXr4GxgM9VqqFG7u+Q3h4=
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github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
github.com/klauspost/cpuid/v2 v2.2.5 h1:0E5MSMDEoAulmXNFquVs//DdoomxaoTY1kUhbc/qbZg=
github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
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github.com/nyaruka/phonenumbers v1.0.55/go.mod h1:sDaTZ/KPX5f8qyV9qN+hIm+4ZBARJrupC6LuhshJq1U=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
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github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
github.com/tidwall/gjson v1.9.3/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/gjson v1.14.4/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
go.opentelemetry.io/otel v1.22.0 h1:xS7Ku+7yTFvDfDraDIJVpw7XPyuHlB9MCiqqX5mcJ6Y=
go.opentelemetry.io/otel v1.22.0/go.mod h1:eoV4iAi3Ea8LkAEI9+GFT44O6T/D0GWAVFyZVCC6pMI=
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.22.0 h1:zr8ymM5OWWjjiWRzwTfZ67c905+2TMHYp2lMJ52QTyM=
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.22.0/go.mod h1:sQs7FT2iLVJ+67vYngGJkPe1qr39IzaBzaj9IDNNY8k=
go.opentelemetry.io/otel/metric v1.22.0 h1:lypMQnGyJYeuYPhOM/bgjbFM6WE44W1/T45er4d8Hhg=
go.opentelemetry.io/otel/metric v1.22.0/go.mod h1:evJGjVpZv0mQ5QBRJoBF64yMuOf4xCWdXjK8pzFvliY=
go.opentelemetry.io/otel/sdk v1.22.0 h1:6coWHw9xw7EfClIC/+O31R8IY3/+EiRFHevmHafB2Gw=
go.opentelemetry.io/otel/sdk v1.22.0/go.mod h1:iu7luyVGYovrRpe2fmj3CVKouQNdTOkxtLzPvPz1DOc=
go.opentelemetry.io/otel/trace v1.22.0 h1:Hg6pPujv0XG9QaVbGOBVHunyuLcCC3jN7WEhPx83XD0=
go.opentelemetry.io/otel/trace v1.22.0/go.mod h1:RbbHXVqKES9QhzZq/fE5UnOSILqRt40a21sPw2He1xo=
golang.org/x/arch v0.0.0-20201008161808-52c3e6f60cff/go.mod h1:flIaEI6LNU6xOCD5PaJvn9wGP0agmIOqjrtsKGRguv4=
golang.org/x/arch v0.0.0-20210923205945-b76863e36670/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
golang.org/x/arch v0.5.0 h1:jpGode6huXQxcskEIpOCvrU+tzo81b6+oFLUYXWtH/Y=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20220110181412-a018aaa089fe/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
123 changes: 123 additions & 0 deletions logging/zerolog/logger.go
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// Copyright 2024 CloudWeGo Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package zerolog

import (
"context"
"errors"

"github.com/cloudwego/hertz/pkg/common/hlog"
hertzzerolog "github.com/hertz-contrib/logger/zerolog"
"github.com/rs/zerolog"
"go.opentelemetry.io/otel/codes"
"go.opentelemetry.io/otel/trace"
)

type Logger struct {
*hertzzerolog.Logger
config *config
}

// Ref to https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/logs/README.md#json-formats
const (
TraceIDKey = "trace_id"
SpanIDKey = "span_id"
TraceFlagsKey = "trace_flags"
)

type ExtraKey string

func NewLogger(opts ...Option) *Logger {
cfg := defaultConfig()

// apply options
for _, opt := range opts {
opt.apply(cfg)
}
logger := *cfg.logger
zerologLogger := logger.Unwrap().Hook(cfg.getZerologHookFn())

return &Logger{
Logger: hertzzerolog.From(zerologLogger),
config: cfg,
}
}

func (l *Logger) CtxLogf(level hlog.Level, ctx context.Context, format string, kvs ...any) {
var zlevel zerolog.Level

switch level {
case hlog.LevelDebug, hlog.LevelTrace:
zlevel = zerolog.DebugLevel
l.Logger.CtxDebugf(ctx, format, kvs...)
case hlog.LevelInfo:
zlevel = zerolog.InfoLevel
l.Logger.CtxInfof(ctx, format, kvs...)
case hlog.LevelNotice, hlog.LevelWarn:
zlevel = zerolog.WarnLevel
l.Logger.CtxWarnf(ctx, format, kvs...)
case hlog.LevelError:
zlevel = zerolog.ErrorLevel
l.Logger.CtxErrorf(ctx, format, kvs...)
case hlog.LevelFatal:
zlevel = zerolog.FatalLevel
l.Logger.CtxFatalf(ctx, format, kvs...)
default:
zlevel = zerolog.WarnLevel
l.Logger.CtxWarnf(ctx, format, kvs...)
}

span := trace.SpanFromContext(ctx)
if !span.IsRecording() {
l.Logger.Logf(level, format, kvs...)
return
}

// set span status
if zlevel >= l.config.traceConfig.errorSpanLevel {
msg := getMessage(format, kvs)
span.SetStatus(codes.Error, "")
span.RecordError(errors.New(msg), trace.WithStackTrace(l.config.traceConfig.recordStackTraceInSpan))
}
}

func (l *Logger) CtxTracef(ctx context.Context, format string, v ...any) {
l.CtxLogf(hlog.LevelDebug, ctx, format, v...)
}

func (l *Logger) CtxDebugf(ctx context.Context, format string, v ...any) {
l.CtxLogf(hlog.LevelDebug, ctx, format, v...)
}

func (l *Logger) CtxInfof(ctx context.Context, format string, v ...any) {
l.CtxLogf(hlog.LevelInfo, ctx, format, v...)
}

func (l *Logger) CtxNoticef(ctx context.Context, format string, v ...any) {
l.CtxLogf(hlog.LevelWarn, ctx, format, v...)
}

func (l *Logger) CtxWarnf(ctx context.Context, format string, v ...any) {
l.CtxLogf(hlog.LevelWarn, ctx, format, v...)
}

func (l *Logger) CtxErrorf(ctx context.Context, format string, v ...any) {
l.CtxLogf(hlog.LevelError, ctx, format, v...)
}

func (l *Logger) CtxFatalf(ctx context.Context, format string, v ...any) {
// l.CtxLogf(hlog.LevelFatal, ctx, format, v...)
l.Logger.CtxFatalf(ctx, format, v...)
}
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