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Serverless Stream Processing with Bill Bejeck
The document is a presentation by Bill Bejeck on serverless stream processing, highlighting topics such as stateful versus stateless processing, the role of ksqlDB for real-time applications, and the integration of AWS Lambda into serverless architectures. It includes details for a meetup, instructional resources, and an application walkthrough using ksqlDB for managing stream data. Key features covered include immediate event response, simplified infrastructure management, and essential queries for creating and processing data streams.
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Serverless Stream Processing with Bill Bejeck
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- 2. @bbejeck Nice to meetyou! • Member of the DevX team • Prior to DevX ~3 years as engineer on Kafka Streams team • Apache Kafka® Committer and PMC member • Author of “Kafka Streams in Action” - 2nd edition underway! 2
- 3. @bbejeck Agenda • Meetup Details •Serverless Vegetable Soup • ksqlDB Introduction • AWS Lambda • Application walkthrough 3
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- 5. @bbejeck Meetup Details • CloneGitHub repo for the meetup • https://github.com/confluentinc/CCloud-Serverless-Integration • https://docs.confluent.io/confluent-cli/current/install.html • https://aws.amazon.com/cli/ • Get a Confluent Cloud account • https://confluent.cloud/signup • Use code CC60COMM • AWS account • https://aws.amazon.com/free/ • Create a root account 5
- 6. @bbejeck Meetup Details • Kickoff the application script • <repo directory>/ccloud-build-app.sh 6
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- 8. @bbejeck Stateful vs Stateless •Stateless is simpler • Predicate.apply(T parameter) • Idempotent functions • Can’t make decisions based on previous inputs • Stateful is more complex • Aggregations • Keeps state of previous records • Can make decisions in near-real time when combined with stream processing 8
- 9. @bbejeck Stream Processing • Whydo we need it? • Hotel interactions • Check-in, mini-bar purchases • Fraud detection • No good to look at yesterday's transactions • Supply chain • Route a truck in real-time 9
- 10. @bbejeck Stream Processing • Applicationscan respond immediately to events • Context-aware decisions in real-time • Implies the need for state – hard to make decisions in on isolated events • State needs to be easy to manage • Needs to be highly available 10
- 11. @bbejeck Serverless • Not concernedwith infrastructure • Some one else’s issue! * • Focus is solely on your business problem • Simplified development process * • Only pay for what’s used • Flexible options driven by needs/requirements 11
- 12. @bbejeck Functions as aService (FaaS) • Extension of Serverless (my interpretation) • Discrete chunk of code vs. an application • Triggered by specific event – typically not long running • Scales with load • Sporadic in nature • Executes when needed • Only pay for what’s used 12
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- 14. Compute Storage CREATE TABLEactivePromotions AS SELECT rideId, qualifyPromotion(distanceToDst) AS promotion FROM locations GROUP BY rideId EMIT CHANGES ksqlDB Kafka Build a complete real-time application with just a few SQL statements Easily Build Real- Time Apps ksqlDB at a Glance ksqlDB is a database for building real- time applications that leverage stream processing Joins Aggregates Push & Pull Queries Filters User-Defined Functions Connectors
- 15. @bbejeck ksqlDB and events •Enables event-based applications • Using stateful operations are easily and seamless 15
- 16. @bbejeck ksqlDB Input Data { ”side":”BUY", ”quantity": 2000, ”symbol": ”CFLT", ”price": 100, ”account": “Vandeley”, "userid": 100 } 16
- 17. @bbejeck ksqlDB Create Stream CREATESTREAM stocktrade (side varchar, quantity int, symbol varchar, price int, account varchar, userid int) WITH (kafka_topic = 'stocktrade’, partitions = 6, value_format = ‘JSON’); 17
- 18. @bbejeck ksqlDB Create Table CREATETable users (userid varchar primary key, registertime bigint, regionid varchar) WITH (kafka_topic = ‘users’, value_format = ‘JSON’); 18
- 19. @bbejeck ksqlDB Persistent Query(Push) CREATE TABLE SHARE_PRICE AS SELECT symbol, AVG(price) AS AVERAGE_SHARE_PRICE FROM stocks WINDOW TUMBLING (SIZE 5 MINUTES) GROUP BY symbol EMIT CHANGES; 19
- 20. @bbejeck ksqlDB Pull Query SELECT* from SHARE_PRICE WHERE symbol = 'CFLT' 20
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- 25. @bbejeck AWS Lambda • ExemplifiesFaaS • Key component of AWS Serverless Application Model • https://docs.aws.amazon.com/serverless-application- model/latest/developerguide/what-is-sam.html • Upload code as a zip file • Configure the trigger 25
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- 28. @bbejeck Additional Steps • Createthe AWS Lambda • Set properties in configs.sh • View Lambda logs • Execute SQL for processing Lambda output • View the Stream Lineage on Confluent 28
- 29. @bbejeck Clean Up • Importantto run the clean up steps outlined in repo • Remove all AWS components • Remove all Confluent Cloud 29
- 30. @bbejeck For More Details •Serverless processing whitepaper • https://www.confluent.io/resources/white-paper/stateful-serverless- architectures-with-ksqldb-aws-lambda/ • Blog on serverless stream processing • https://www.confluent.io/blog/serverless-event-stream-processing/ 30
- 31. @bbejeck Resources • Tutorials andksqlDB use cases – https://developer.confluent.io/tutorials • ksqlDB Documentation - https://docs.ksqldb.io/en/latest/ • Confluent Developer - developer.confluent.io • AWS SAM - https://docs.aws.amazon.com/serverless-application- model/latest/developerguide/what-is-sam.html 31
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