1. VINCENT KOK • DEV MANAGER • ATLASSIAN • @VINCENTKOK
Microservices
5 things I wish I’d known

2. BUILDING MICROSERVICES
ISSUES
MOVING FORWARD
Agenda

3. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/fSopv4
You’ve got issues

4. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/7WcQwA
Slow down

5. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/bRgBZP
Lock up

6. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/bByin8
Technology will age

7. The promise of Microservices
Small Independent lifecycle ReplaceableRight tool

8. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/aSqP7p
Steep journey ahead

9. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/kENTD4
Fast forward to the top

10. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/kENTD4
http://images.clipartpanda.com/rainbow-unicorn-cute-tumblr_lj9cy4iZ821qdabzno1_r4_500.png
No silver bullet

11. Examples

12. Confluence
Connect
Conversion
Filestore

13. Identity
6+AvatarLogin

14. Build

15. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
Build a pattern
https://flic.kr/p/8ykpkW

16. The Twelve
Factor App
XI. Logs
One codebase tracked in revision
control, many deploys
V. Build, release, run
Strictly separate build and run stages
I. Codebase
Treat logs as event streams

17. Anatomy of a service

18. Health check
200
!200

19. /healthcheck
{
"avatar": {
"details": {},
"isHealthy": true,
"metadata": {
"hash": "379965ce",
"name": "Avatar service",
"version": "2.0.8"
}
}
}

20. /healthcheck/details
{
"avatar": {
"details": {
"avatarRepository": {
"isHealthy": true
},
"crowd": {
"isHealthy": true
},
"deadlock": {
"isHealthy": true

21. 1 Build1 Repository
For every service

22. One Bitbucket repository per service

23. From slow
MTTR

24. To fast and reliable
A slightly better MTTR

25. Configure

26. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/8prXA6
Prevent different lifecycles

27. Layered
layout
Common configuration per
environment
Per service
Common configuration per service
Per environment

28. Simple format
include "common.prod.conf"
include "service.conf"
http {
port = 8080
interface = "127.0.0.1"
}
recaptcha.key.site = "....."
recaptcha.enable = true
static.asset.base = "...."

29. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
No secrets

30. Deploy

31. DeployBuild and testCommit to master
Deployment pipeline
Release

32. Environments
Development Staging Production Disaster Recovery

33. Build and upload
Deployment projects take
care of the actual deployment

34. Create release from build
Build release information

35. Feedback per environment
Versioned release per environment

36. Test

37. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
Isolation
https://flic.kr/p/dxUhia

38. PDVFunctional testsUnit tests
Test strategy
Contract tests

39. Functional tests
Stub Service mock

40. Stub sample
<beans profile="it">
<bean id="myClient" class=“com.mycompany.MyStub”/>
</beans>

41. WireMock sample
{
"request": {
"url": “/myresource",
"method": “POST”
"Accept": {
"matches": “application/json”
}
},
"response": {
"status": 204
}
}

42. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
Consumer Driven
Contract Testing
https://flic.kr/p/9mjRKW

43. An example
Service A Service B
REST
Consumer Provider

44. Consumer expectation
uponReceiving("A request by user id for a user")
.matching(path = "/Users/1")
.willRespondWith(body = userByIdResponse)
.during { providerConfig =>
Client(providerConfig.url).get("/Users/1)
must beEqualTo(200, Some(userByIdResponse))
}

45. Consumer side
HTTP request
HTTP response
Client Service Mock PACT

46. Provider side
HTTP request
HTTP response
PACT PACT runner Provider

47. PACT Matrix
Consumer master Consumer prod
Provider master Latest compatible
Provider
Compatible
Provider prod
Consumer
Compatible
Already tested

48. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
Post Deployment
Verification
https://flic.kr/p/6wHFj5

49. PDV
Development Staging Production Disaster Recovery

50. Operate

51. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
100 lbs
https://flic.kr/p/biy2an
99% of water
dehydrate to 98%
How much do they weigh now?

52. 50lbs

53. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
What is the uptime of service
that depends on 30 services
with an uptime of 99.99?
https://flic.kr/p/51TYD1

54. 99.99 = 99.7%
30

55. 4m23
to
> 2h

56. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
Know your system!
https://flic.kr/p/9b24xc

57. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace

58. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace

59. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace

60. Trace your requests
X-B3-TraceId : 1
X-B3-SpanId : 1
X-B3-TraceId : 1
X-B3-SpanId : 2
X-B3-ParentSpanId : 1
X-B3-TraceId : 1
X-B3-SpanId : 3
X-B3-ParentSpanId : 2
X-B3-TraceId : 1
X-B3-SpanId : 4
X-B3-ParentSpanId : 3

61. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace

62. Moving forward

63. 5 Things

64. • Big cool statistic
• 2,56
9
• Add-Ons in Marketplace
https://flic.kr/p/3Esx3o
More decisions to come

65. Thank you!
VINCENT KOK • DEV MANAGER • ATLASSIAN • @VINCENTKOK