Microservices with Apache Camel

1. PUBLIC PRESENTATION | CLAUS IBSEN1 Microservices with Apache Camel Claus Ibsen (@davsclaus) Principal Software Engineer, Red Hat

2. PUBLIC PRESENTATION | CLAUS IBSEN2 Agenda ● What is Apache Camel? ● A little Example ● Microservice Demo ● Standalone ● with Docker ● with OpenShift 3 / Kubernetes ● More Information

3. PUBLIC PRESENTATION | CLAUS IBSEN3 Your Speaker ● Principal Software Engineer at Red Hat ● Apache Camel ● 7 years working with Camel ● Author of Camel in Action book ● Contact ● EMail: cibsen@redhat.com ● Twitter: @davsclaus ● Blog: http://davsclaus.com ● Linkedin: http://www.linkedin.com/in/davsclaus

5. PUBLIC PRESENTATION | CLAUS IBSEN5 What is Apache Camel? ● Quote from the website

6. PUBLIC PRESENTATION | CLAUS IBSEN6 What is Apache Camel? ● Why do we need integration? ● Critical for your business to integrate ● Why Integration Framework? ● Framework do the heavy lifting ● You can focus on business problem ● Not "reinventing the wheel"

7. PUBLIC PRESENTATION | CLAUS IBSEN7 What is Apache Camel? ● What is Enterprise Integration Patterns? It's a book

8. PUBLIC PRESENTATION | CLAUS IBSEN8 What is Apache Camel? ● Enterprise Integration Patterns http://camel.apache.org/eip

9. PUBLIC PRESENTATION | CLAUS IBSEN9 What is Apache Camel? ● EIP - Content Based Router

10. PUBLIC PRESENTATION | CLAUS IBSEN10 What is Apache Camel? from newOrder

11. PUBLIC PRESENTATION | CLAUS IBSEN11 What is Apache Camel? from newOrder choice

12. PUBLIC PRESENTATION | CLAUS IBSEN12 What is Apache Camel? from newOrder choice when isWidget to widget

13. PUBLIC PRESENTATION | CLAUS IBSEN13 What is Apache Camel? from newOrder choice when isWidget to widget otherwise to gadget

14. PUBLIC PRESENTATION | CLAUS IBSEN14 What is Apache Camel? from(newOrder) choice when(isWidget) to(widget) otherwise to(gadget)

15. PUBLIC PRESENTATION | CLAUS IBSEN15 What is Apache Camel? from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);

16. PUBLIC PRESENTATION | CLAUS IBSEN16 What is Apache Camel? Endpoint newOrder = endpoint("activemq:queue:newOrder"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);

17. PUBLIC PRESENTATION | CLAUS IBSEN17 What is Apache Camel? Endpoint newOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);

18. PUBLIC PRESENTATION | CLAUS IBSEN18 What is Apache Camel? Endpoint newOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); Endpoint widget = endpoint("activemq:queue:widget"); Endpoint gadget = endpoint("activemq:queue:gadget"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);

19. PUBLIC PRESENTATION | CLAUS IBSEN19 What is Apache Camel? ● Java Code public void configure() throws Exception { Endpoint newOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); Endpoint widget = endpoint("activemq:queue:widget"); Endpoint gadget = endpoint("activemq:queue:gadget"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget) .end(); }

20. PUBLIC PRESENTATION | CLAUS IBSEN20 What is Apache Camel? ● Java Code import org.apache.camel.Endpoint; import org.apache.camel.Predicate; import org.apache.camel.builder.RouteBuilder; public class MyRoute extends RouteBuilder { public void configure() throws Exception { Endpoint newOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); Endpoint widget = endpoint("activemq:queue:widget"); Endpoint gadget = endpoint("activemq:queue:gadget"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget) .end(); } }

21. PUBLIC PRESENTATION | CLAUS IBSEN21 What is Apache Camel? ● Camel Java DSL import org.apache.camel.builder.RouteBuilder; public class MyRoute extends RouteBuilder { public void configure() throws Exception { from("activemq:queue:newOrder") .choice() .when(xpath("/order/product = 'widget'")) .to("activemq:queue:widget") .otherwise() .to("activemq:queue:gadget") .end(); } }

22. PUBLIC PRESENTATION | CLAUS IBSEN22 What is Apache Camel? ● Camel XML DSL <route> <from uri="activemq:queue:newOrder"/> <choice> <when> <xpath>/order/product = 'widget'</xpath> <to uri="activemq:queue:widget"/> </when> <otherwise> <to uri="activemq:queue:gadget"/> </otherwise> </choice> </route>

23. PUBLIC PRESENTATION | CLAUS IBSEN23 What is Apache Camel? ● Endpoint as URIs <route> <from uri="file:inbox/orders"/> <choice> <when> <xpath>/order/product = 'widget'</xpath> <to uri="activemq:queue:widget"/> </when> <otherwise> <to uri="activemq:queue:gadget"/> </otherwise> </choice> </route> use file instead

24. PUBLIC PRESENTATION | CLAUS IBSEN24 What is Apache Camel? ● Endpoint as URIs <route> <from uri="file:inbox/orders?delete=true"/> <choice> <when> <xpath>/order/product = 'widget'</xpath> <to uri="activemq:queue:widget"/> </when> <otherwise> <to uri="activemq:queue:gadget"/> </otherwise> </choice> </route> parameters

25. PUBLIC PRESENTATION | CLAUS IBSEN25 Standard Java or XML ● Java DSL is just Java

26. PUBLIC PRESENTATION | CLAUS IBSEN26 Standard Java or XML ● XML DSL is just XML ● … with XSD schema for validation/tooling

27. PUBLIC PRESENTATION | CLAUS IBSEN27 What is Apache Camel? ● Camel's Architecture

28. PUBLIC PRESENTATION | CLAUS IBSEN28 What is Apache Camel? 150+ Components

29. PUBLIC PRESENTATION | CLAUS IBSEN29 What is Apache Camel? 150+ Components

30. PUBLIC PRESENTATION | CLAUS IBSEN30 What is Apache Camel? ● Summary ● Integration Framework ● Enterprise Integration Patterns (EIP) ● Routing (using DSL) ● Easy Configuration (endpoint as uri's) ● Just Java or XML code ● No Container Dependency ● A lot of components

32. PUBLIC PRESENTATION | CLAUS IBSEN32 A Little Example ● File Copier Example

38. PUBLIC PRESENTATION | CLAUS IBSEN38 Microservice Demo - Overview ● camel-archetype-cdi camel-archetype-web Java Standalone Apache Tomcat HTTP 8080 from timer to http to log from http choice setBody

39. PUBLIC PRESENTATION | CLAUS IBSEN39 Creating new Camel Projects ● Using Command Shell ● From Eclipse

40. PUBLIC PRESENTATION | CLAUS IBSEN40 Creating new Camel Projects ● ... or JBoss Forge

41. PUBLIC PRESENTATION | CLAUS IBSEN41 Creating new Camel Projects ● Maven Archetypes Archetypes Archetypes camel-archetype-activemq camel-archetype-groovy camel-archetype-api-component camel-archetype-java camel-archetype-blueprint camel-archetype-scala camel-archetype-cdi camel-archetype-scr camel-archetype-component camel-archetype-spring camel-archetype-cxf-code-first-blueprint camel-archetype-spring-boot camel-archetype-cxf-contract-first-blueprint camel-archetype-spring-dm camel-archetype-dataformat camel-archetype-web

42. PUBLIC PRESENTATION | CLAUS IBSEN42 Creating new Camel Projects ● camel-archetype-cdi To run from CLI mvn clean install exec:java

43. PUBLIC PRESENTATION | CLAUS IBSEN43 Creating new Camel Projects ● add http component Adds the chosen component to the pom.xml file. CMD + ALT 4

44. PUBLIC PRESENTATION | CLAUS IBSEN44 Creating new Camel Projects ● add change route to call http://localhost:8080

45. PUBLIC PRESENTATION | CLAUS IBSEN45 Creating new Camel Projects ● add change bean to return a name

46. PUBLIC PRESENTATION | CLAUS IBSEN46 Creating new Camel Projects ● camel-archetype-web To run from CLI mvn clean install jetty:run

47. PUBLIC PRESENTATION | CLAUS IBSEN47 Microservice Demo - Overview ● camel-archetype-cdi camel-archetype-web Java Standalone Apache Tomcat HTTP 8080 from timer to http to log from http choice setBody We are ready to run standalone

48. PUBLIC PRESENTATION | CLAUS IBSEN48 Running Standalone ● camel-archetype-web ● Start Apache Tomcat with bin/cataline run ● Copy the .war to Tomcat deploy folder

49. PUBLIC PRESENTATION | CLAUS IBSEN49 Running Standalone ● camel-archetype-cdi ● mvn install exec:java

50. PUBLIC PRESENTATION | CLAUS IBSEN50 Monitor using hawtio embedded in Tomcat ● Copy hawtio.war to Tomcat deploy folder

52. PUBLIC PRESENTATION | CLAUS IBSEN52 Camel and Docker ● Dockerizing your Camel Projects ● Using Roland Huss's Docker Maven Plugin ● https://github.com/rhuss/docker-maven-plugin .. by manually adding to pom.xml and configure ● ... but we use the Forge

53. PUBLIC PRESENTATION | CLAUS IBSEN53 Camel and Docker ● Dockerizing your Camel Projects with JBoss Forge ● From CLI Add FORGE_HOME/bin to $PATH

54. PUBLIC PRESENTATION | CLAUS IBSEN54 Camel and Docker ● Dockerizing your Camel Projects with JBoss Forge ● From Eclipse IDEA NetBeans ● ... and web CMD + ALT 4 Sorry I only have an old screenshot of forge-web

55. PUBLIC PRESENTATION | CLAUS IBSEN55 Camel and Docker ● Build Docker Containers ● mvn clean install docker:build ● ... Images now in your local docker repository camel-archetype-cdi camel-archetype-web docker-maven-plugin uses $DOCKER_HOST Fabric8 w/ OpenShift 3: DOCKER_HOST="tcp://vagrant.local:2375" Boot2Docker: DOCKER_HOST="tcp://192.168.59.105:2375"

56. PUBLIC PRESENTATION | CLAUS IBSEN56 Camel and Docker ● Run Docker Containers ● docker run -it -p 8080:8080 -p 8778:8778 172.30.111.183:5000/fabric8/myweb:1.0-SNAPSHOT The 10.000$$$ Docker Question What the f$QRC#%A%%EG is the IP address of the container 8080 = Tomcat 8778 = Jolokia

57. PUBLIC PRESENTATION | CLAUS IBSEN57 Camel and Docker ● What is the IP Address of the Docker Container

58. PUBLIC PRESENTATION | CLAUS IBSEN58 Camel and Docker ● camel-archetype-cdi ● I would need to change the hostname to the docker assigned IP address

59. PUBLIC PRESENTATION | CLAUS IBSEN59 Camel and Docker ● camel-archetype-cdi ● .. and then build the docker image ● And then run the docker image ● docker run -it 172.30.111.183:5000/fabric8/mycdi:1.0- SNAPSHOT

60. PUBLIC PRESENTATION | CLAUS IBSEN60 Camel and Docker ● Pheeew isn't this easier? Yes !!!

62. PUBLIC PRESENTATION | CLAUS IBSEN62 Microservices Demo - Recap ● camel-archetype-cdi camel-archetype-web Java Standalone Apache Tomcat HTTP 8080 from timer to http to log from http choice setBody

63. PUBLIC PRESENTATION | CLAUS IBSEN63 Microservices Demo - Use Service ● camel-archetype-cdi camel-archetype-web Java Standalone Apache Tomcat from timer to http to log from http choice setBody Service Kubernetes Service

64. PUBLIC PRESENTATION | CLAUS IBSEN64 What is a Kubernetes Service ● Kubernetes Service http://fabric8.io/guide/services.html

65. PUBLIC PRESENTATION | CLAUS IBSEN65 Define Kubernetes Service ● Define in pom.xml in <properties> Apache Tomcat from http choice setBody Service Container Port = Inside Docker Container (e.g. the port of Apache Tomcat) Service Port = Outside Consumers of Service to use Name of service

66. PUBLIC PRESENTATION | CLAUS IBSEN66 Define Kubernetes Service ● ... generates into kubernetes.json using fabric8:json plugin Apache Tomcat from http choice setBody Service

67. PUBLIC PRESENTATION | CLAUS IBSEN67 About using Kubernetes Service Discover Kubernetes Services Java Standalone from timer to http to log

68. PUBLIC PRESENTATION | CLAUS IBSEN68 Client - Use Kubernetes Service ● Use {{service:name}} in Camel ... you can use default values {{service:name:host:port}} Java Standalone from timer to http to log host:port would be default if service is not discovered

69. PUBLIC PRESENTATION | CLAUS IBSEN69 Microservice Demo - Ready for launch! ● camel-archetype-cdi camel-archetype-web Java Standalone Apache Tomcat from timer to http to log from http choice setBody Service Service defined Ready to deploy to Kubernetes

70. PUBLIC PRESENTATION | CLAUS IBSEN70 Deploy - camel-archetype-web ● camel-archetype-web ● mvn clean install docker:build fabric8:apply Apache Tomcat from http choice setBody Service

71. PUBLIC PRESENTATION | CLAUS IBSEN71 Deploy - camel-archetype-cdi ● camel-archetype-cdi ● mvn clean install docker:build fabric8:apply Java Standalone from timer to http to log

72. PUBLIC PRESENTATION | CLAUS IBSEN72 fabric8 web console ● http://fabric8.vagrant.local ● Easy by configuring the replication size

73. PUBLIC PRESENTATION | CLAUS IBSEN73 OpenShift 3 CLI ● osc get pods docker CLI is also possible docker images docker ps

74. PUBLIC PRESENTATION | CLAUS IBSEN74 OpenShift 3 CLI ● osc get services

75. PUBLIC PRESENTATION | CLAUS IBSEN75 OpenShift 3 CLI ● osc logs -f <pod-name>

76. PUBLIC PRESENTATION | CLAUS IBSEN76 Scaling up / down ● ... by changing replication size on controller

77. PUBLIC PRESENTATION | CLAUS IBSEN77 Scaling up / down ● web console shows we now have 3 pods

78. PUBLIC PRESENTATION | CLAUS IBSEN78 Scaling up / down ● and the camel-archetype-cli pod is load balancing the mycoolservice among the 3 live pods

80. PUBLIC PRESENTATION | CLAUS IBSEN80 Where do I get more information? ● Apache Camel Microservices ● http://camel.apache.org/camel-boot ● Fabric8 ● http://fabric8.io ● chat room #fabric-8 on freenode ● OpenShift 3 ● https://github.com/openshift/origin ● Kubernetes ● https://github.com/googlecloudplatform/kubernetes

81. PUBLIC PRESENTATION | CLAUS IBSEN81 Any Questions ? ● Contact ● EMail: cibsen@redhat.com / claus.ibsen@gmail.com ● Twitter: @davsclaus ● Blog: http://davsclaus.com ● Linkedin: http://www.linkedin.com/in/davsclaus