~1 sec. build and deploy
on Kubernetes

Peter Palaga

@ppalaga

Peter Palaga

• Senior engineer at Red Hat Middleware
  • Red Hat Fuse on EAP (WildFly Camel)
  • JBoss EAP (WildFly)
• Author of
  • srcdeps - source dependencies for Maven and Gradle
  • Maven and Gradle plugins for .editorconfig

Agenda

• Apache Camel intro
• Apache Camel K

What is Apache Camel?

Since 2007

Huge community

• 466 contributors
• ~2500 stars on Github
• ~3300 forks on Github
• >1000 subscribers on users mailing list

An integration library

Enterprise Integration Patterns (EIP)

integrate anything

through its

~280 components

Domain Specific Languages (DSL)

class MyCamelRouter extends RouteBuilder {
  @Override
  public void configure() throws Exception {
    from("twitter-search:"
        + "word1,word2")
      .log("Got a tweet: ${body}")
      .to("telegram:bots");
  }
}

<routes
  xmlns="http://camel.apache.org/schema/spring">
  <route id="my-route">
    <from uri="twitter-search:word1,word2"/>
    <log message="Got a tweet: ${body}"/>
    <to uri="telegram:bots"/>
  </route>
</routes>

Groovy, Scala, Kotlin, ...

Runnable on

Spring Boot
Standalone

Apache Camel 3

Overall goals:

Demo

• Tweets containing Camel and #VDBUH2019
• Telegram bot: camelDemoBot

Traditional way

• fabric8-maven-plugin to build the image
• 1+ min to build and deploy a simple app

New areas of interest

• Low code/no code integrations: Syndesis
• A "glue" for Serverless Functions

Apache Camel K!

Subproject of Apache Camel
since Aug. 31st. 2018

Camel K demo

Camel K internals

• kamel client side binary
  • github.com/apache/camel-k/releases
• Camel K Operator

Kubernetes Operators

• An Application Management concept
• Does what a human operator would have to do
  • Based on declarative input

How it works

Via Kubernetes API:

• Monitors the cluster
• Reacts:
  • Add/remove/modify resources (pods/services/custom CRDs)
  • Scale up/down
  • Call endpoints of the running applications
• Implements custom logic

Custom Resource Definitions (CRD)

Camel K Operator

Image resolution (1/2)

Choose IntegrationRuntime based on DSL used

• Generic JVM (covers JavaScript)
• Java

  }	Sets of depen- dencies

• Groovy
• Kotlin
• Spring Boot
• XML

Image resolution (2/2)

• Based on the used Camel components
  • Either takes an available Image (buildless deploy)
  • Or builds a new image


• Route definition not a part of the image
  • Either takes an available Image (buildless deploy)
  • Mounted to the container as a ConfigMap

Camel K limitations

• Not a 100% replacement for traditional Apache Camel
• No built in means for testing

Apache Camel K wrap up

• Operator based Kubernetes runtime for Camel
• Fast prototyping
• Routes with simple/no business logic

Project info

• https://github.com/apache/camel-k
• Chat: https://gitter.im/apache/camel-k
• Mailing list: dev@camel.apache.org
• Follow @ni_ferraro and @lburgazzoli