What is a Microservice?

It was 10 years ago that the term "microservice" was coined - that makes it as old as Agile on the Beach! But where did it come from, and what is it? In this light-hearted talk, we'll cover the history, the design and hopefully answer the question "what is a microservice?"

Transcript

1. What is a microservice? Chris O’Dell Agile on the Beach 2021
2. @ChrisAnnODell About Me Senior Software Engineer 15+ years experience (inc: Monzo, Contino, JustEat, and 7digital) Speaker, Author, and Course Tutor
3. What is a microservice? Chris O’Dell Agile on the Beach 2021
4. @ChrisAnnODell Microservice architecture – a variant of the service-oriented architecture (SOA) structural style – arranges an application as a collection of loosely-coupled services. In a microservices architecture, services are fine-grained and the protocols are lightweight. - Wikipedia
5. @ChrisAnnODell Where did the name come from? https://en.wikipedia.org/wiki/Microservices#History
6. @ChrisAnnODell According to this paper https://arxiv.org/abs/1606.04036
7. @ChrisAnnODell According to this paper https://arxiv.org/abs/1606.04036
8. @ChrisAnnODell According to James Lewis & Martin Fowler https://martinfowler.com/articles/microservices.html
9. @ChrisAnnODell According to James Lewis & Martin Fowler https://martinfowler.com/articles/microservices.html#footnote-etymology
10. @ChrisAnnODell It’s everywhere! https://www.dataversity.net/a-brief-history-of-microservices/ https://www.infoq.com/presentations/microservices-roundtable-2020/ https://devopedia.org/microservices
11. @ChrisAnnODell … so I contacted James
12. @ChrisAnnODell Bruce Eckel
13. @ChrisAnnODell Bruce Eckel
14. @ChrisAnnODell Bruce Eckel
15. @ChrisAnnODell Bruce Eckel Jimmy Nilsson
16. @ChrisAnnODell Jimmy Nilsson
17. What is a microservice? Chris O’Dell Agile on the Beach 2021
18. @ChrisAnnODell Microservice architecture – a variant of the service-oriented architecture (SOA) structural style – arranges an application as a collection of loosely-coupled services. In a microservices architecture, services are fine-grained and the protocols are lightweight. - Wikipedia
19. @ChrisAnnODell Service Oriented Architecture (SOA) https://www.flickr.com/photos/davegray/6865783407/
20. @ChrisAnnODell SOA Principles Service Contract Composable Autonomy Stateless Reusable Loose Coupling Black boxes Granular Normalised Long lived
21. @ChrisAnnODell Simple Object Access Protocol (SOAP) https://flylib.com/books/en/2.439.1.22/1/
22. @ChrisAnnODell Distributed Computing https://www.sciencedirect.com/topics/computer-science/distributed-computing
23. @ChrisAnnODell Modular Programming https://resources.altium.com/p/product-design-trends-in-2020-modular-hardware-vs-modular-software
24. @ChrisAnnODell Microservices Modular Programming SOA Distributed Computing
25. @ChrisAnnODell Back to Venice...
26. @ChrisAnnODell Struggling with the maintenance of large codebases
27. @ChrisAnnODell Instead of large things, why not make small things?
28. Multiple Discovery
29. @ChrisAnnODell Invention of the Telephone
30. @ChrisAnnODell Invention of the Telephone
31. Multiple Discovery Of Microservices
32. @ChrisAnnODell The “workshop” in Venice http://2012.33degree.org/ James Lewis
33. @ChrisAnnODell Alternative universe? Fred George https://www.slideshare.net/fredgeorge/micro-service-architecure
34. @ChrisAnnODell Alternative universe? Adrian Cockcroft https://www.slideshare.net/adrianco/netflix-velocity-conference-2011
35. So, what is a microservice?
36. @ChrisAnnODell So, what is a microservice? https://twitter.com/ChrisAnnODell/status/1423618814390964224
37. @ChrisAnnODell So, what is a microservice? https://twitter.com/bascule/status/1423706101531381767
38. @ChrisAnnODell So, what is a microservice? https://twitter.com/graham_r_smith/status/1423627130022334466
39. @ChrisAnnODell So, what is a microservice? https://twitter.com/DivZero_/status/1423843330169794561
40. @ChrisAnnODell Let’s go back to wikipedia...
41. @ChrisAnnODell There is no single definition for microservices. - Wikipedia
42. @ChrisAnnODell There is no single definition for microservices. A consensus view has evolved over time in the industry. - Wikipedia
43. @ChrisAnnODell There is no single definition for microservices. A consensus view has evolved over time in the industry. Some of the defining characteristics that are frequently cited include: - Wikipedia
44. @ChrisAnnODell 1. Processes that communicate over a network to fulfil a goal using technology-agnostic protocols such as HTTP
45. @ChrisAnnODell 2. Services are organized around business capabilities
46. @ChrisAnnODell 3. Services can be implemented using different programming languages, databases, hardware and software environment, depending on what fits best
47. @ChrisAnnODell 3. Services can be implemented using different programming languages, databases, hardware and software environment, depending on what fits best.
48. @ChrisAnnODell 4. Services are small in size, messaging-enabled, bounded by contexts, autonomously developed, independently deployable, decentralized and built and released with automated processes
49. @ChrisAnnODell Myths
50. @ChrisAnnODell So, what is a microservice? https://twitter.com/Lilobase/status/1423641694856269828
51. @ChrisAnnODell You need to use kubernetes Myth
52. @ChrisAnnODell You need containers Myth
53. @ChrisAnnODell You need to be on the Cloud Myth
54. @ChrisAnnODell
55. @ChrisAnnODell You need to use gRPC Myth
56. @ChrisAnnODell You need to be a startup Myth
57. Cultural Changes
58. @ChrisAnnODell So, what is a microservice? https://twitter.com/kieranmch/status/1423619285155565570
59. @ChrisAnnODell 4. Services are small in size, messaging-enabled, bounded by contexts, autonomously developed, independently deployable, decentralized and built and released with automated processes
60. @ChrisAnnODell 4. Services are small in size, messaging-enabled, bounded by contexts, autonomously developed, independently deployable, decentralized and built and released with automated processes
61. @ChrisAnnODell 4. Services are small in size, messaging-enabled, bounded by contexts, autonomously developed, independently deployable, decentralized and built and released with automated processes
62. @ChrisAnnODell 4. Services are small in size, messaging-enabled, bounded by contexts, autonomously developed, independently deployable, decentralized and built and released with automated processes
63. @ChrisAnnODell 4. Services are small in size, messaging-enabled, bounded by contexts, autonomously developed, independently deployable, decentralized and built and released with automated processes
64. Pitfalls
65. @ChrisAnnODell So, what is a microservice? https://twitter.com/malk_zameth/status/1423637160381624330
66. @ChrisAnnODell Underestimating the Increased Operability Costs Pitfalls
67. @ChrisAnnODell Underinvestment in build and deployment Pitfalls
68. @ChrisAnnODell Tight coupling between microservices Pitfalls
69. Have we taken it too far?
70. @ChrisAnnODell A web https://twitter.com/JackKleeman/status/1190354757308862468
71. @ChrisAnnODell Adding in groupings https://twitter.com/JackKleeman/status/1190973434601324544
72. @ChrisAnnODell Swing back to monoliths?
73. @ChrisAnnODell Continue to evolve Modular Programming SOA Microservices Distributed Computing ?
74. @ChrisAnnODell So, what is a microservice?
75. @ChrisAnnODell So, what is a microservice? https://twitter.com/da5is/status/1423635467145203717
76. CREDITS: This presentation template was created by Slidesgo, including icons by Flaticon, and infographics & images by Freepik Do you have any questions? Chris O’Dell @ChrisAnnODell THANKS