The role of workflows in microservices
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Slides from my keynote at #CamundaCon Berlin in September 2018 which role workflow automation technology plays in microservice architectures
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The role of workflows in microservices
- 1. @berndruecker The Role of Workflows in Microservices
- 4. Data, data, data, … Source: Microservices orchestration survey, July 2018, 354 responses
- 5. 92 %
- 6. Why?
- 7. Photo by born1945, available under Creative Commons BY 2.0 license.
- 8. How to get something out of it? Photo by pxhere, available under Creative Commons CC0 1.0 License.
- 10. Sample architecture: De-coupled services with event backbone Checkout Inventory Payment Shipment e.g. Kafka, …
- 13. The danger is that it's very easy to make nicely decoupled systems with event notification, without realizing that you're losing sight of that larger-scale flow, and thus set yourself up for trouble in future years. https://martinfowler.com/articles/201701-event-driven.html
- 14. The danger is that it's very easy to make nicely decoupled systems with event notification, without realizing that you're losing sight of that larger-scale flow, and thus set yourself up for trouble in future years. https://martinfowler.com/articles/201701-event-driven.html
- 15. The danger is that it's very easy to make nicely decoupled systems with event notification, without realizing that you're losing sight of that larger-scale flow, and thus set yourself up for trouble in future years. https://martinfowler.com/articles/201701-event-driven.html
- 16. Challenges?
- 17. What we wanted Photo by Lijian Zhang, available under Creative Commons SA 2.0 License and Pedobear19 / CC BY-SA 4.0
- 18. Microservice pioneers have become aware
- 19. Workflow automation | orchestration is an essential building block in microservice architectures Of course I am opinioated – but I truly believe this!
- 20. Workflow automation | orchestration is an essential building block in microservice architectures Of course I am opinioated – but I truly believe this! Orchestration is not a central thing! „It is not BPEL“
- 21. Finding the right balance 22 Observe Microservice Paradigms ● Loose Coupling ● Autonomy ● Event Collaboration Ensure Flow Manageability • End-To-End Visibility • Meet Business Process SLA • Support Continuous Process Improvement
- 22. Different levels of leveraging workflow automation Manage the flow Track the flow Non-invasive to event-driven-architecture Additionally to choreography Limited in power Needs to be incorporated Mixture of choreography and orchestration Leverage full potential
- 24. Tracking + BI Checkout Inventory Payment Shipment Kafka Workflow Engine Camunda Optimize Other reporting / BI solutions
- 25. Tracking + BI Checkout Inventory Payment Shipment Kafka Workflow Engine Camunda Optimize Other reporting / BIO solutions
- 26. Tracking + BI Checkout Inventory Payment Shipment Kafka Workflow Engine Camunda Optimize Other reporting / BI solutions This is totally non-invasive But also limited in power
- 27. Start acting upon certain events
- 28. Why so shy? Photo by LuidmilaKot, available under Creative Commons CC0 1.0 License.
- 29. Changing the flow Checkout Payment Inventory Shipment Fetch the goods before the payment
- 30. Changing the flow Checkout Payment Inventory Shipment Fetch the goods before the payment
- 31. Photo by born1945, available under Creative Commons BY 2.0 license.
- 37. Order Checkout Payment Inventory Shipment Stateful orchestration This orchestration requires state
- 38. BPMN supports integration use cases Aggregator Re-Sequencer Combined with timeouts: Zeebe supports Message TTL
- 39. BPMN supports integration use cases Compensation
- 40. Order Checkout Payment Inventory Shipment Every service owns its workflow!
- 41. Central workflow engine or … Checkout Inventory Payment Shipment Workflow Engine Order Owned heredeployed here Owned here
- 42. …decentral workflow engine Checkout Inventory Payment Shipment Workflow Engine OrderWorkflow Engine
- 43. Same architecture with REST Checkout Inventory Payment Shipment Workflow Engine Order Workflow Engine
- 44. Challenge Monitoring Checkout Inventory Payment Shipment Workflow Engine Order Workflow Engine Monitor e.g. Elastic Links back Optimize
- 45. Same architecture with REST Checkout Inventory Payment Shipment Workflow Engine Order Workflow Engine
- 46. Work distribution via workflow engine Checkout Inventory Payment Shipment Order Workflow Engine Start Workflow Owns workflow definition External Task Worker
- 47. Hybrid architectures Order Credit Card Customer Credit Payment Pub/Sub e.g. Message Bus Pub/Sub Work Distribution e.g. External Task Request/Response e.g. REST
- 48. Recap • Microservices have its merits • You need to balance orchestration and chorography • Distributed systems need stateful orchestration • Visibility is essential to survive • Track, monitor or manage the flow – depending on your scenario • Workflow automation is an essential building block, make sure to use BPMN
- 49. 1 4 5 Continuous Process Improvement Technical Workflow Implementation Operating mission-critical Processes Broad-scale Adoption of Automation Automated Enterprise Adoption Journey Value Time / Invest 1 2 3 4 5 2 3
- 51. Love to see code?
- 52. Thank you!