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pick up the common part of elasticsearch sink
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huangyuqi
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May 12, 2016
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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 | ||
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import ( | ||
"fmt" | ||
"net/url" | ||
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"github.com/golang/glog" | ||
"github.com/olivere/elastic" | ||
"github.com/pborman/uuid" | ||
) | ||
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const ( | ||
ESIndex = "heapster" | ||
) | ||
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// SaveDataFunc is a pluggable function to enforce limits on the object | ||
type SaveDataFunc func(esClient *elastic.Client, indexName string, typeName string, sinkData interface{}) error | ||
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type ElasticSearchConfig struct { | ||
EsClient *elastic.Client | ||
Index string | ||
NeedAuthen bool | ||
EsUserName string | ||
EsUserSecret string | ||
EsNodes []string | ||
} | ||
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// 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 | ||
} | ||
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func CreateElasticSearchConfig(uri *url.URL) (*ElasticSearchConfig, error) { | ||
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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) | ||
} | ||
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// set the index for es,the default value is "heapster" | ||
esConfig.Index = ESIndex | ||
if len(opts["index"]) > 0 { | ||
esConfig.Index = opts["index"][0] | ||
} | ||
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// 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 | ||
} | ||
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// 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) | ||
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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...)) | ||
} | ||
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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 | ||
} |
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