mirror of https://github.com/prometheus/prometheus
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.6 KiB
60 lines
1.6 KiB
// 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 ( |
|
"fmt" |
|
"os" |
|
"time" |
|
|
|
"github.com/go-kit/log" |
|
) |
|
|
|
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, 0o666) |
|
if err != nil { |
|
return nil, fmt.Errorf("can't create json logger: %w", err) |
|
} |
|
|
|
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...) |
|
}
|
|
|