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// Copyright 2019 The etcd 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 logutil
import (
"sort"
"time"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
// CreateDefaultZapLogger creates a logger with default zap configuration
func CreateDefaultZapLogger(level zapcore.Level) (*zap.Logger, error) {
lcfg := DefaultZapLoggerConfig
lcfg.Level = zap.NewAtomicLevelAt(level)
c, err := lcfg.Build()
if err != nil {
return nil, err
}
return c, nil
}
// DefaultZapLoggerConfig defines default zap logger configuration.
var DefaultZapLoggerConfig = zap.Config{
Level: zap.NewAtomicLevelAt(ConvertToZapLevel(DefaultLogLevel)),
Development: false,
Sampling: &zap.SamplingConfig{
Initial: 100,
Thereafter: 100,
},
Encoding: "json",
// copied from "zap.NewProductionEncoderConfig" with some updates
EncoderConfig: zapcore.EncoderConfig{
TimeKey: "ts",
LevelKey: "level",
NameKey: "logger",
CallerKey: "caller",
MessageKey: "msg",
StacktraceKey: "stacktrace",
LineEnding: zapcore.DefaultLineEnding,
EncodeLevel: zapcore.LowercaseLevelEncoder,
// Custom EncodeTime function to ensure we match format and precision of historic capnslog timestamps
EncodeTime: func(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
enc.AppendString(t.Format("2006-01-02T15:04:05.000000Z0700"))
},
EncodeDuration: zapcore.StringDurationEncoder,
EncodeCaller: zapcore.ShortCallerEncoder,
},
// Use "/dev/null" to discard all
OutputPaths: []string{"stderr"},
ErrorOutputPaths: []string{"stderr"},
}
// MergeOutputPaths merges logging output paths, resolving conflicts.
func MergeOutputPaths(cfg zap.Config) zap.Config {
outputs := make(map[string]struct{})
for _, v := range cfg.OutputPaths {
outputs[v] = struct{}{}
}
outputSlice := make([]string, 0)
if _, ok := outputs["/dev/null"]; ok {
// "/dev/null" to discard all
outputSlice = []string{"/dev/null"}
} else {
for k := range outputs {
outputSlice = append(outputSlice, k)
}
}
cfg.OutputPaths = outputSlice
sort.Strings(cfg.OutputPaths)
errOutputs := make(map[string]struct{})
for _, v := range cfg.ErrorOutputPaths {
errOutputs[v] = struct{}{}
}
errOutputSlice := make([]string, 0)
if _, ok := errOutputs["/dev/null"]; ok {
// "/dev/null" to discard all
errOutputSlice = []string{"/dev/null"}
} else {
for k := range errOutputs {
errOutputSlice = append(errOutputSlice, k)
}
}
cfg.ErrorOutputPaths = errOutputSlice
sort.Strings(cfg.ErrorOutputPaths)
return cfg
}
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