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elasticsearch.go
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elasticsearch.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 elasticsearch
import (
"fmt"
"net/url"
"github.com/golang/glog"
"github.com/olivere/elastic"
"github.com/pborman/uuid"
)
const (
ESIndex = "heapster"
)
// SaveDataFunc is a pluggable function to enforce limits on the object
type SaveDataFunc func(esClient *elastic.Client, indexName string, typeName string, sinkData interface{}) error
type ElasticSearchConfig struct {
EsClient *elastic.Client
Index string
NeedAuthen bool
EsUserName string
EsUserSecret string
EsNodes []string
}
// SaveDataIntoES save metrics and events to ES by using ES client
func SaveDataIntoES(esClient *elastic.Client, indexName string, typeName string, sinkData interface{}) error {
if indexName == "" || typeName == "" || sinkData == nil {
return nil
}
// Use the IndexExists service to check if a specified index exists.
exists, err := esClient.IndexExists(indexName).Do()
if err != nil {
return err
}
if !exists {
// Create a new index.
createIndex, err := esClient.CreateIndex(indexName).Do()
if err != nil {
return err
}
if !createIndex.Acknowledged {
return fmt.Errorf("failed to create Index in ES cluster: %s", err)
}
}
indexID := uuid.NewUUID()
_, err = esClient.Index().
Index(indexName).
Type(typeName).
Id(string(indexID)).
BodyJson(sinkData).
Do()
if err != nil {
return err
}
return nil
}
func CreateElasticSearchConfig(uri *url.URL) (*ElasticSearchConfig, error) {
var esConfig ElasticSearchConfig
opts, err := url.ParseQuery(uri.RawQuery)
if err != nil {
return nil, fmt.Errorf("failed to parser url's query string: %s", err)
}
// set the index for es,the default value is "heapster"
esConfig.Index = ESIndex
if len(opts["index"]) > 0 {
esConfig.Index = opts["index"][0]
}
// If the ES cluster needs authentication, the username and secret
// should be set in sink config.Else, set the Authenticate flag to false
esConfig.NeedAuthen = false
if len(opts["esUserName"]) > 0 && len(opts["esUserSecret"]) > 0 {
esConfig.EsUserName = opts["esUserName"][0]
esConfig.NeedAuthen = true
}
// set the URL endpoints of the ES's nodes. Notice that
// when sniffing is enabled, these URLs are used to initially sniff the
// cluster on startup.
if len(opts["nodes"]) < 1 {
return nil, fmt.Errorf("There is no node assigned for connecting ES cluster")
}
esConfig.EsNodes = append(esConfig.EsNodes, opts["nodes"]...)
glog.V(2).Infof("configing elasticsearch sink with ES's nodes - %v", esConfig.EsNodes)
var client *(elastic.Client)
if esConfig.NeedAuthen == false {
client, err = elastic.NewClient(elastic.SetURL(esConfig.EsNodes...))
} else {
client, err = elastic.NewClient(elastic.SetBasicAuth(esConfig.EsUserName, esConfig.EsUserSecret), elastic.SetURL(esConfig.EsNodes...))
}
if err != nil {
return nil, fmt.Errorf("failed to create ElasticSearch client: %v", err)
}
esConfig.EsClient = client
glog.V(2).Infof("elasticsearch sink configure successfully")
return &esConfig, nil
}