142 lines
3.5 KiB
Go
142 lines
3.5 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"encoding/hex"
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"errors"
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"io/ioutil"
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"github.com/Sirupsen/logrus"
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"github.com/minio/sha256-simd"
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"gopkg.in/olivere/elastic.v3"
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)
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// elasticQueue is a elasticsearch event notification queue.
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type elasticSearchNotify struct {
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Enable bool `json:"enable"`
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URL string `json:"url"`
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Index string `json:"index"`
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}
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type elasticClient struct {
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*elastic.Client
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params elasticSearchNotify
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}
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// Connects to elastic search instance at URL.
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func dialElastic(esNotify elasticSearchNotify) (*elastic.Client, error) {
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if !esNotify.Enable {
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return nil, errNotifyNotEnabled
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}
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client, err := elastic.NewClient(
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elastic.SetURL(esNotify.URL),
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elastic.SetSniff(false),
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elastic.SetMaxRetries(10),
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)
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if err != nil {
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return nil, err
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}
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return client, nil
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}
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func newElasticNotify(accountID string) (*logrus.Logger, error) {
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esNotify := serverConfig.GetElasticSearchNotifyByID(accountID)
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// Dial to elastic search.
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client, err := dialElastic(esNotify)
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if err != nil {
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return nil, err
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}
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// Use the IndexExists service to check if a specified index exists.
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exists, err := client.IndexExists(esNotify.Index).Do()
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if err != nil {
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return nil, err
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}
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// Index does not exist, attempt to create it.
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if !exists {
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var createIndex *elastic.IndicesCreateResult
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createIndex, err = client.CreateIndex(esNotify.Index).Do()
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if err != nil {
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return nil, err
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}
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if !createIndex.Acknowledged {
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return nil, errors.New("Index not created.")
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}
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}
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elasticCl := elasticClient{
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Client: client,
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params: esNotify,
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}
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elasticSearchLog := logrus.New()
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// Disable writing to console.
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elasticSearchLog.Out = ioutil.Discard
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// Add a elasticSearch hook.
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elasticSearchLog.Hooks.Add(elasticCl)
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// Set default JSON formatter.
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elasticSearchLog.Formatter = new(logrus.JSONFormatter)
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// Success, elastic search successfully initialized.
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return elasticSearchLog, nil
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}
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// Fire is required to implement logrus hook
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func (q elasticClient) Fire(entry *logrus.Entry) error {
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// Reflect on eventType and Key on their native type.
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entryStr, ok := entry.Data["EventType"].(string)
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if !ok {
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return nil
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}
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keyStr, ok := entry.Data["Key"].(string)
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if !ok {
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return nil
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}
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// Calculate a unique key id. Choosing sha256 here.
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shaKey := sha256.Sum256([]byte(keyStr))
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keyStr = hex.EncodeToString(shaKey[:])
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// If event matches as delete, we purge the previous index.
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if eventMatch(entryStr, []string{"s3:ObjectRemoved:*"}) {
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_, err := q.Client.Delete().Index(q.params.Index).
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Type("event").Id(keyStr).Do()
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if err != nil {
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return err
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}
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return nil
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} // else we update elastic index or create a new one.
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_, err := q.Client.Index().Index(q.params.Index).
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Type("event").
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BodyJson(map[string]interface{}{
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"Records": entry.Data["Records"],
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}).Id(keyStr).Do()
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return err
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}
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// Required for logrus hook implementation
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func (q elasticClient) Levels() []logrus.Level {
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return []logrus.Level{
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logrus.InfoLevel,
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}
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}
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