Developing integration microservices using CI/CD with apache camel, open shift, fabric8.io, jenkins, et al.

1. Managing Your Camels in the Cloud
@christianposta
Principal Architect at Red Hat
6/29/16

2. Christian Posta
Principal Middleware Architect @ Red Hat
Twitter: @christianposta
Blog: http://blog.christianposta.com
Email: christian@redhat.com
• “Microservices for Java developers” (6/2016)
• Committer Apache Camel, ActiveMQ, Fabric8, others
• Worked with large Microservices, web-scale, unicorn company
• Blogger, speaker about DevOps, integration, and microservices

3. Do we need “integration?”
What kind of challenges are we going to run into?
How do we manage our integrations and microservices?
We’re off to do Microservices!

4. Infrastructure for scale
Organizational structure
Identify a useful domain model with boundaries
Transformation Challenges

5. Domain Complexity
• Break things into smaller,
understandable models
• Surround a model and its
“context” with a boundary
• Implement the model in code
or get a new model
• Explicitly map between
different contexts
• Model transactional
boundaries as aggregates

7. • Where we went wrong
• Architectural concepts for scaling
• Domain Driven Design, CQRS,
Event Sourcing
• Monolith->Microservices hands-on
• WildFly Swarm, Spring Boot,
Apache Camel, Apache Kafka,
Debezium, Docker, Kubernetes,
OpenShift
SOA to Microservices: modernization with microservices and containers
Thursday, 3:30p-4:30p room 2022

8. Do we need integration?
• REST, RPC
• Messaging (ActiveMQ, JMS, AMQP, STOMP, Kafka, etc)
• Legacy (SOAP, mainframe, file processing, proprietary)
• Managed file processing
• Streaming
• Message transformation
• EIPs

9. Do we need integraton?

10. Real developers ride camels!

11. • Small Java library
• Very popular (200+ components for “dumb pipes”)
• Powerful EIPs (routing, transformation, error handling)
• Distributed-systems swiss-army knife!
• Declarative DSL
• Embeddable into any JVM (EAP, Karaf, Tomcat, Spring Boot,
Dropwizard, Wildfly Swarm, no container, etc)
Apache Camel

12. • Dynamic routing
• Powerful testing/mocking framework
• Circuit breakers, fallbacks, automatic retries, back-off
• Idempotent consumers
• Backpressure mechanisms
• Beautiful REST DSL with built in Swagger support
Camel for microservices!

14. public class OrderProcessorRouteBuilder extends RouteBuilder {
@Override
public void configure() throws Exception {
rest().post(“/order/socks”)
.description(“New Order for pair of socks”)
.consumes(“application/json”)
.route()
.to(“activemq:topic:newOrder”)
.log(“received new order ${body.orderId}”)
.to(“ibatis:storeOrder?statementType=Insert”);
}
Expose rest end point

15. public class OrderProcessorRouteBuilder extends RouteBuilder {
@Override
public void configure() throws Exception {
from(“jms:topic:foo”)
.hystrix()
.to(“http://fooservice/”)
.onFallback()
.transform().constant(“fallback foo!”)
.end()
}
Circuit Breaker/fallback

16. public class OrderProcessorRouteBuilder extends RouteBuilder {
@Override
public void configure() throws Exception {
from(“jms:topic:foo”)
.idempotentConsumer(header(“fooMessageId”), memoryCache)
.to(“http://fooservice/”)
.log(“got response ${body}”);
}
Idempotent consumer

17. • How to run them all locally?
• How to integrate them?
• How to package them (dependency management)
• How to test?
• Vagrant? VirtualBox? VMs?
• Specify configuration
• Process isolation
• Service discovery
Problems developing microservices

19. Linux Containers

20. Red hat OpenShift
• Developer focused workflow
• Enterprise ready, supported
• Higher level abstraction above containers for delivering technology and
business value
• Build/deployment triggers
• Software Defined Networking (SDN)
• Docker native format/packaging
• CLI/Web based tooling

21. Fuse integration services
https://docs.openshift.com/enterprise/3.1/using_images/xpaas_images/fuse.html

22. • Set of tools for integration developers
• Package your Fuse/Camel services as Docker images
• Run locally on CDK (container development kit)
• Manage them with Kubernetes/OpenShift
• Flat class loader JVMs
• Supports Spring, CDI, Blueprint
• Plugs-in to your existing build/release ecosystem (Jenkins/
Maven/Nexus/Gitlab,etc)
Fuse integration services

23. • How to run them all locally?
• How to package them
• How to test?
• Vagrant? VirtualBox? VMs?
• Specify configuration
• Process isolation
• Service discovery
• Multiple versions?
Problems developing microservices: SOLVED

27. Microservices Platform on Kubernetes/OpenShift

30. Christian Posta
Principal Middleware Specialist/Architect
Twitter: @christianposta
Blog: http://blog.christianposta.com
Email: christian@redhat.com
Questions, Discussion, Demo!