Claus Ibsen's presentation during Red Hat's "Microservices Journey with Apache Camel" events that took place in Atlanta on Oct 4th and Minneapolis on Oct 6th.

1. Developing
microservices
with Apache Camel

2. Atlanta 2011
https://devnexus.com

3. Claus Ibsen
• Principal Software Engineer
at Red Hat
• Apache Camel
8 years working with Camel
• Author of
Camel in Action books
@davsclaus
davsclaus
davsclaus.com

4. Java Developer
?
?
or

5. Build a
Camel Demo
Time

6. Source Code
https://github.com/davsclaus/fabric8-hello

7. Hello Service
Hello
Service
Client

8. Hello Service
Hello
Service
Hello I am $HOSTNAME
Client

9. Implementation
Client Hello Service
HTTP
WildFy
Swarm
Spring Boot WildFly Swarm

10. Implementation
Hello
Service
Client Hello Service
HTTP

11. Implementation
Client Hello Service
HTTP
from timer
to http
log
from undertow
transform
helloservice

12. Spring Boot Starter

13. Client

14. Type Safe Camel Editor
Cursor is here
http://fabric8.io/guide/forge.html

15. Type Safe Camel Editor

16. Type Safe Camel Editor

17. WildFly Swarm Generator

18. Hello Service

19. Hello Service

20. Ready to run local
Client Hello Service
HTTP 8080
from timer
to netty
log
from undertow
transform
helloservice

21. How to build Docker Image?
Maven Project Docker Image

22. Docker Maven Plugin
Maven Project
Fabric8 Maven
Plugin
Docker Image
build
https://maven.fabric8.io

23. Fabric8 Maven Plugin
https://maven.fabric8.io

24. Install
fabric8-maven-plugin
mvn io.fabric8:fabric8-maven-plugin:3.1.63:setup
https://maven.fabric8.io

25. Fabric8 Maven Plugin

26. Build Docker Image
mvn package fabric8:build

27. Local Docker Repository
Hello Service
Client

28. Our Demo
Client Hello Service
http://localhost:8080
from timer
to http
log
from undertow
transform
helloservice

29. Static vs Dynamic Platform
Client Hello Service
from timer
to http
log
from undertow
transform
helloservice
Hardcoded
hostname and port
http://localhost:8080

30. Dynamic Platform
Hello Service
service ip:port
Client
from timer
to http
log
from undertow
transform
helloservice
Kubernetes
Service

31. Kubernetes Service
• Network Connection to one or more Pods
• Unique static IP and port (lifetime of service)

32. Kubernetes
Service
service ip:port
from timer
to http
log
from undertow
transform
helloservice
kubeproxy
Kubernetes
Master
enlisted on deployment
changes
pod
node
pod
node

33. Kubernetes Service
from user point of view
service ip:port
from timer
to http
log
from undertow
transform
helloservice
pod pod

34. Out of the box service
Maven artifactId
WildFly Swarm
HTTP port

35. Service w/ Context Path
• Annotate Service with Context-Path
/say
is context-path
src/main/fabric8/service.yml

36. Custom Service
Container Port =
Inside
Service Port =
Outside
Service Name
src/main/fabric8/service.yml

37. Using Kubernetes
Service
Client
from timer
to http
log
We want to use hello service
How do we do that?

38. Using Kubernetes
Service
• Environment Variables
• Hostname
• Port
Client
from timer
to http
log
Service Discovery using DNS is available
in newer versions of Kubernetes.

39. Service using ENV
• Use ENV Client
from timer
to http
log

40. Service using DNS
• Use DNS Client
from timer
to http
log

41. Ready to run in Kubernetes
Client Hello Service
{{service:helloswarm}}
from timer
to netty
log
from undertow
transform
helloservice
kubeproxy

42. How to deploy to
Kubernetes?
Maven Project

43. How to deploy to
Kubernetes?
Maven Project
fabric8 Maven
Plugin
run

44. Deploy - Hello Service
Hello Service
from undertow
transform
helloservice
• mvn fabric8:run
mvn fabric8:deploy

45. Deploy - Client
• mvn fabric8:run
mvn fabric8:deploy
Client
from timer
to http
log

46. Debugging
• Debugging Pods
mvn fabric8:debug

47. Remote Debug
Port 5005

48. Remote Debug
Breakpoint hit

49. Running Local
Kubernetes/OpenShift
• Fabric8 Maven Plugin
• MiniKube
• MiniShift
• Vagrant
• OpenShift CDK
https://fabric8.io/guide/getStarted/index.html

50. Running fabric8
• Download gofabric8
https://github.com/fabric8io/gofabric8/releases
• Start fabric8
gofabric8 start --minishift --console --memory=2000
https://fabric8.io/guide/getStarted/minishift.html

51. Running fabric8
mvn
io.fabric8:
fabric8-maven-plugin:3.1.63:
cluster-start
-Dfabric8.cluster.kind=openshift

52. How I installed
OpenShift

53. Installing is easy
(even from a bar with a drink)
https://vimeo.com/185299147

54. fabric8 Web Console
minishift service fabric8

55. OpenShift CLI
• oc get pods
You can also use CLI from
docker &
kubernetes

56. OpenShift CLI
• oc get service

57. OpenShift CLI
• oc logs -f <pod name>

58. • minishift service helloswarm
Access Service
from your laptop

59. Scaling
• Change deployment replicas

60. Scaling
• Service load balancing
Load balancing
is random

61. Error Handling
• Client Side Redelivery

62. Error Handling
• Client Side Circuit Breaker

63. Angry Pods
1st person shooter - Kill your pods

64. Free Book
http://developers.redhat.com/promotions/
microservices-for-java-developers/

65. Non Free Book
https://leanpub.com/camel-design-patterns

66. Non Free Book
https://www.packtpub.com/application-development/
apache-camel-developers-cookbook

67. Non Free Book
http://manning.com/ibsen2
Coupon code: camel39
gives 39% discount

68. Links
• fabric8
• http://fabric8.io
• Demo source code
• https://github.com/davsclaus/fabric8-hello
• Try fabric8
• https://fabric8.io/guide/getStarted/minishift.html
• Videos, blogs and more
• https://fabric8.io/community/index.html
@davsclaus
davsclaus
davsclaus.com