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minio/logger-elasticsearch.go

118 lines
2.8 KiB

/*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
*
* 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 main
import (
"errors"
"github.com/Sirupsen/logrus"
"gopkg.in/olivere/elastic.v3"
)
// elasticQueue is a elasticsearch event notification queue.
type elasticSearchLogger struct {
Enable bool `json:"enable"`
Level string `json:"level"`
URL string `json:"url"`
Index string `json:"index"`
}
type elasticClient struct {
*elastic.Client
params elasticSearchLogger
}
// Connects to elastic search instance at URL.
func dialElastic(esLogger elasticSearchLogger) (*elastic.Client, error) {
if !esLogger.Enable {
return nil, errLoggerNotEnabled
}
client, err := elastic.NewClient(elastic.SetURL(esLogger.URL), elastic.SetSniff(false))
if err != nil {
return nil, err
}
return client, nil
}
// Enables elasticsearch logger.
func enableElasticLogger() error {
esLogger := serverConfig.GetElasticSearchLogger()
// Dial to elastic search.
client, err := dialElastic(esLogger)
if err != nil {
return err
}
// Use the IndexExists service to check if a specified index exists.
exists, err := client.IndexExists(esLogger.Index).Do()
if err != nil {
return err
}
// Index does not exist, attempt to create it.
if !exists {
var createIndex *elastic.IndicesCreateResult
createIndex, err = client.CreateIndex(esLogger.Index).Do()
if err != nil {
return err
}
if !createIndex.Acknowledged {
return errors.New("index not created")
}
}
elasticCl := elasticClient{
Client: client,
params: esLogger,
}
lvl, err := logrus.ParseLevel(esLogger.Level)
fatalIf(err, "Unknown log level found in the config file.")
// Add a elasticsearch hook.
log.Hooks.Add(elasticCl)
// Set default JSON formatter.
log.Formatter = new(logrus.JSONFormatter)
// Set default log level to info.
log.Level = lvl
return nil
}
// Fire is required to implement logrus hook
func (q elasticClient) Fire(entry *logrus.Entry) error {
_, err := q.Client.Index().Index(q.params.Index).
Type("event").
BodyJson(entry.Data).
Do()
return err
}
// Required for logrus hook implementation
func (q elasticClient) Levels() []logrus.Level {
return []logrus.Level{
logrus.PanicLevel,
logrus.FatalLevel,
logrus.ErrorLevel,
logrus.WarnLevel,
logrus.InfoLevel,
logrus.DebugLevel,
}
}