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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ddb-elasticsearch 2 | ======== 3 | 4 | An example [AWS Lambda](https://aws.amazon.com/lambda) function to index records from 5 | [DynamoDB](https://aws.amazon.com/dynamodb) to [ElasticSearch](https://aws.amazon.com/elasticsearch-service). 6 | 7 | To try this example, simply deploy using the provided SAM template file. 8 | -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | elasticsearch>=7.0.0,<8.0.0 2 | aws_requests_auth==0.4.3 3 | requests>=2.20.0 4 | -------------------------------------------------------------------------------- /src/lambda_function.py: -------------------------------------------------------------------------------- 1 | import os 2 | import logging 3 | from elasticsearch import Elasticsearch, RequestsHttpConnection 4 | from aws_requests_auth.aws_auth import AWSRequestsAuth 5 | 6 | es_host = os.getenv('ELASTICSEARCH_URL') 7 | es_index = os.getenv('ELASTICSEARCH_INDEX') 8 | key_name = os.getenv('KEY_NAME') 9 | access_key = os.getenv('AWS_ACCESS_KEY_ID') 10 | secret_access_key = os.getenv('AWS_SECRET_ACCESS_KEY') 11 | session_token = os.getenv('AWS_SESSION_TOKEN') 12 | region = os.getenv('AWS_REGION') 13 | 14 | # Establish connection to ElasticSearch 15 | auth = AWSRequestsAuth(aws_access_key=access_key, 16 | aws_secret_access_key=secret_access_key, 17 | aws_token=session_token, 18 | aws_host=es_host, 19 | aws_region=region, 20 | aws_service='es') 21 | 22 | es = Elasticsearch(host=es_host, 23 | port=443, 24 | use_ssl=True, 25 | connection_class=RequestsHttpConnection, 26 | http_auth=auth) 27 | 28 | print(es.info()) 29 | 30 | 31 | def lambda_handler(event, context): 32 | """Lambda Function entrypoint handler 33 | 34 | :event: DynamoDB Stream event 35 | :context: Lambda context 36 | :returns: Number of records processed 37 | 38 | """ 39 | processed = 0 40 | for record in event['Records']: 41 | ddb_record = record['dynamodb'] 42 | key = str(ddb_record['Keys'][key_name]['S']) 43 | if record['eventName'] == 'REMOVE': 44 | print("Deleting record: " + key) 45 | res = es.delete(index=es_index, doc_type='event', id=key) 46 | else: 47 | image = ddb_record['NewImage'] 48 | res = es.index(index=es_index, doc_type='event', 49 | id=key, body=image) 50 | 51 | print(res) 52 | processed = processed + 1 53 | 54 | print('Successfully processed {} records'.format(processed)) 55 | return processed 56 | -------------------------------------------------------------------------------- /template.yaml: -------------------------------------------------------------------------------- 1 | Transform: 'AWS::Serverless-2016-10-31' 2 | Metadata: 3 | AWS::ServerlessRepo::Application: 4 | Name: dynamodb-elasticsearch 5 | Description: An example AWS Lambda function to index records from DynamoDB to ElasticSearch. 6 | Author: Kwun-Hok Chan 7 | SpdxLicenseId: Apache-2.0 8 | LicenseUrl: LICENSE 9 | ReadmeUrl: README.md 10 | Labels: ['AWS', 'sample', 'dynamodb', 'elasticsearch'] 11 | HomePageUrl: https://github.com/chankh/ddb-elasticsearch 12 | SemanticVersion: 1.0.1 13 | SourceCodeUrl: https://github.com/chankh/ddb-elasticsearch 14 | Parameters: 15 | DynamoDBKey: 16 | Description: "The name of primary key for DynamoDB table." 17 | Type: "String" 18 | ElasticSearchUrl: 19 | Description: "The url for API access to ElasticSearch." 20 | Type: "String" 21 | ElasticSearchIndex: 22 | Description: "The name of ElasticSearch index to use." 23 | Type: "String" 24 | Resources: 25 | GetSAMPartyCount: 26 | Type: AWS::Serverless::Function 27 | Properties: 28 | Handler: lambda_function.lambda_handler 29 | Runtime: python3.8 30 | CodeUri: src/ 31 | Environment: 32 | Variables: 33 | ELASTICSEARCH_URL: !Ref ElasticSearchUrl 34 | ELASTICSEARCH_INDEX: !Ref ElasticSearchIndex 35 | KEY_NAME: !Ref DynamoDBKey 36 | --------------------------------------------------------------------------------