mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-14 01:24:04 -08:00
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
// Copyright 2020 The Prometheus 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 logging
|
|
|
|
import (
|
|
"os"
|
|
"time"
|
|
|
|
"github.com/go-kit/log"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
var (
|
|
timestampFormat = log.TimestampFormat(
|
|
func() time.Time { return time.Now().UTC() },
|
|
"2006-01-02T15:04:05.000Z07:00",
|
|
)
|
|
)
|
|
|
|
// JSONFileLogger represents a logger that writes JSON to a file.
|
|
type JSONFileLogger struct {
|
|
logger log.Logger
|
|
file *os.File
|
|
}
|
|
|
|
// NewJSONFileLogger returns a new JSONFileLogger.
|
|
func NewJSONFileLogger(s string) (*JSONFileLogger, error) {
|
|
if s == "" {
|
|
return nil, nil
|
|
}
|
|
|
|
f, err := os.OpenFile(s, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "can't create json logger")
|
|
}
|
|
|
|
return &JSONFileLogger{
|
|
logger: log.With(log.NewJSONLogger(f), "ts", timestampFormat),
|
|
file: f,
|
|
}, nil
|
|
}
|
|
|
|
// Close closes the underlying file.
|
|
func (l *JSONFileLogger) Close() error {
|
|
return l.file.Close()
|
|
}
|
|
|
|
// Log calls the Log function of the underlying logger.
|
|
func (l *JSONFileLogger) Log(i ...interface{}) error {
|
|
return l.logger.Log(i...)
|
|
}
|