81 lines
1.7 KiB
Go
81 lines
1.7 KiB
Go
package logrustash
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
// Formatter generates json in logstash format.
|
|
// Logstash site: http://logstash.net/
|
|
type LogstashFormatter struct {
|
|
Type string // if not empty use for logstash type field.
|
|
|
|
// TimestampFormat sets the format used for timestamps.
|
|
TimestampFormat string
|
|
}
|
|
|
|
func (f *LogstashFormatter) Format(entry *logrus.Entry) ([]byte, error) {
|
|
return f.FormatWithPrefix(entry, "")
|
|
}
|
|
|
|
func (f *LogstashFormatter) FormatWithPrefix(entry *logrus.Entry, prefix string) ([]byte, error) {
|
|
fields := make(logrus.Fields)
|
|
for k, v := range entry.Data {
|
|
//remvove the prefix when sending the fields to logstash
|
|
if prefix != "" && strings.HasPrefix(k, prefix) {
|
|
k = strings.TrimPrefix(k, prefix)
|
|
}
|
|
|
|
switch v := v.(type) {
|
|
case error:
|
|
// Otherwise errors are ignored by `encoding/json`
|
|
// https://github.com/Sirupsen/logrus/issues/377
|
|
fields[k] = v.Error()
|
|
default:
|
|
fields[k] = v
|
|
}
|
|
}
|
|
|
|
fields["@version"] = "1"
|
|
|
|
timeStampFormat := f.TimestampFormat
|
|
|
|
if timeStampFormat == "" {
|
|
timeStampFormat = logrus.DefaultTimestampFormat
|
|
}
|
|
|
|
fields["@timestamp"] = entry.Time.Format(timeStampFormat)
|
|
|
|
// set message field
|
|
v, ok := entry.Data["message"]
|
|
if ok {
|
|
fields["fields.message"] = v
|
|
}
|
|
fields["message"] = entry.Message
|
|
|
|
// set level field
|
|
v, ok = entry.Data["level"]
|
|
if ok {
|
|
fields["fields.level"] = v
|
|
}
|
|
fields["level"] = entry.Level.String()
|
|
|
|
// set type field
|
|
if f.Type != "" {
|
|
v, ok = entry.Data["type"]
|
|
if ok {
|
|
fields["fields.type"] = v
|
|
}
|
|
fields["type"] = f.Type
|
|
}
|
|
|
|
serialized, err := json.Marshal(fields)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
|
|
}
|
|
return append(serialized, '\n'), nil
|
|
}
|