GeeCon - Lessons Learned from 2000 microservices
- 1. Lessons Learned from 2000 event-driven microservices natansil.com twitter@NSilnitsky linkedin/natansilnitsky github.com/natansil Natan Silnitsky Backend Infra TL, Wix April 2023
- 2. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky
- 3. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Unique visitors use Wix platform every month ~1B
- 4. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Unique visitors use Wix platform every month ~1B Daily HTTP Transactions ~500B Kafka messages a day ~70B
- 5. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Unique visitors use Wix platform every month ~1B Daily HTTP Transactions ~500B Kafka messages a day ~70B GAs every day > 600 Microservices in production 2500 * scale, resilience. issues
- 6. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Challenges of event-driven architecture, that we’ve bumped into 1 Producing message failures Processing out-of-order & duplicates 2 4 Troubleshooting production 3 Sending large payloads * success, tools, faster
- 7. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky How Event-driven Architecture Works
- 8. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Service-to-Service Communication Cart Service User Service Inventory Service Catalog Service
- 9. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Request-Reply Communication HTTP RPC HTTP RPC HTTP RPC Cart Service User Service Inventory Service Catalog Service * issue scale
- 10. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky slow Cart Service * slow, bottleneck, cache HTTP RPC HTTP RPC HTTP RPC
- 11. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky unreliable Cart Service * unreliable, cascade, retr HTTP RPC HTTP RPC HTTP RPC
- 12. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Event-driven Communication Producer Broker Product Updated Topic Event * improve, broker, scale Catalog Service Kafka
- 13. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Broker more robust * DB, decoupling, no impact Cart Service Producer Consumer Kafka Catalog Service Product Updated Topic
- 14. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Broker Event processing is guaranteed Producer Consumer Kafka Catalog Service Cart Service Product Updated Topic
- 15. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky The following is based on a true story *Dates and products were changed for clarity :) * ecom simple linear
- 16. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky 2016 Wix starts using event-driven We can work event-driven!!
- 17. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky It all began when Ecom experienced data issues Data does NOT reflect actual catalog Risk: show wrong prices in cart Cart DB
- 18. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky 2. Produce “Product Updated” Event Broker Cart Service 4. Show updated prices in cart 3. Update Product Price Catalog Service 1. Update status After investigating Cart DB
- 19. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Challenge #1 Producing message failure Kafka
- 20. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Broker Cart Service Catalog Service Make DB Update & Event Producing Atomic
- 21. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Produce event to S3 Broker Catalog Service Resilient Producer Catch Unsent Events
- 22. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Produce event to S3 Broker Produce to Kafka Healer Service Catalog Service Poll Resilient Producer Fallback to S3 and Heal
- 23. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Kafka Broker Service A Service B Greyhound Producer Kafka Producer Greyhound Consumer Kafka Consumer Wrap Kafka with Greyhound* * Open source: https://github.com/wix/greyhound
- 24. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky ➔ Resilient Producer ➔ Parallel Consumption ➔ Batch Consumer ➔ Consumer Retry Strategies ➔ Context Propagation ➔ Metrics reporting Developer Self-Service: Wrap Kafka with Greyhound* * Open source: https://github.com/wix/greyhound
- 25. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky 2016 Wix starts using event-driven 2018 Greyhound Resilient producer & Consumer retries
- 26. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Produce event to S3 Broker Produce to Kafka Healer Service Catalog Service Poll Resilient Producer Fallback to S3 and Heal
- 27. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Broker Catalog Service Healer Service Remove Discount Introduce Discount Then ‘out-of-order’ happened Cart Service
- 28. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Challenge #2 Out-of-order & duplicates processing Kafka
- 29. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Catalog Service Broker Healer Service Introduce Discount Mitigating out-of-order with revision ID # 10 # 9 Cart Service
- 30. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Catalog Service Broker Healer Service Remove Discount Introduce Discount Mitigating out-of-order with revision ID # 11 # 10 # 9 Cart Service * item itself
- 31. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Scan the binlog. For each entry produce a ‘status update’ event Cart Service Broker Catalog Service Mitigating out-of-order with Debezium connector
- 32. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky More Ecom data issues Data does NOT reflect actual inventory Risk: lose potential customers Inventory DB
- 33. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Item 2 Item 1 Broker Payments Service Investigation leads to duplicate processing Payment for: Inventory Service Retry Item 2 5 → 3 Item 1 9 → 7 * not idempotent
- 34. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Item 2 5 → 4 Item 1 9 → 8 Item 2 Item 1 Payment for: Broker txnId - a7g45 Mitigating duplicates with Transaction ID Payments Service Inventory Service txnId - a7g45 txnId - a7g45
- 35. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky 2016 Wix starts using event-driven 2018 Greyhound Resilient producer & Consumer retries 2019 Revisions & Transaction IDs
- 36. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Broker Product Catalog Service Product Update event Cart Service “Dude, I can’t produce large payloads” ... "description": "An apple mobile which is nothing like apple", ...
- 37. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky * 1MB Challenge #3 Failure to send large payloads Broker ... "description": "An apple mobile which is nothing like apple", ...
- 38. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Large Payloads Remedy I Compression → Try several compression types (lz4, snappy, etc.) → Compression on Kafka level is usually better than application level, as payloads can be compressed in batches
- 39. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Large Payloads Remedy II Chunking Broker 1. Split to chunks & produce 2. Consume & reassemble Product Catalog Service Cart Service
- 40. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Large Payloads Remedy III Reference to Object Store 2. Produce with S3 URL 3. Consume & download from S3 1. Upload to S3 Product Catalog Service Cart Service Broker
- 41. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky 2016 Wix starts using event-driven 2018 Greyhound Resilient producer & Consumer retries 2019 We use IDs for ooo & duplicates 2020 Added compression by default
- 42. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky * bottlenecks Challenge #4 It’s hard for developers to debug and maintain event-driven microservices at scale in production
- 43. Our team
- 44. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Stream events with various filters
- 45. How do I investigate this lag? Our team
- 46. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Investigate consumer lag per partition
- 47. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky View a “stuck” event in some partition
- 48. How come this side-effect didn’t happen? Our team
- 49. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Orders Service Propagate the Context Broker Payments Topic Orders Topic Inventory Topic requestId userId Event Header 1. Greyhound produce * monitoring infra
- 50. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky 2. Greyhound consume Propagate the Context Payments Service Broker Payments Topic Orders Topic Inventory Topic 3. produce
- 51. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky 4. Greyhound consume Propagate the Context Inventory Service Broker Payments Topic Orders Topic Inventory Topic
- 52. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky So developers can track events’ route
- 53. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky View event details
- 54. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky 2016 Wix starts using event-driven 2018 We open source Greyhound 2019 We use IDs for ooo & duplicates 2020 Added compression by default 2021-22 Tools in Production
- 55. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Wix developers have embraced event-driven architecture.
- 56. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Meeting these challenges made our microservices more decoupled, resilient and scalable, while keeping complexity low and data consistent.
- 57. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky The Blog Post https://medium.com/wix-engineerin g/event-driven-architecture-5-pitfalls-t o-avoid-b3ebf885bdb1
- 58. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky How to migrate 2000 microservices to Multi Cluster Managed Kafka with 0 Downtime The Next Step https://www.youtube.com/watch?v= XKbG8a-9NRE
- 59. Lessons Learned from 2000 Event-driven Microservices @NSilnitsky Greyhound github.com/wix/greyhound
- 60. Thank You! natansil.com twitter@NSilnitsky linkedin/natansilnitsky github.com/natansil 👉 slideshare.net/NatanSilnitsky Any questions?