Kubernetes is becoming the de-facto platform to deploy our application nowadays. But this movement also implies some changes in the way we code our applications. Before this change, we just developed a monolith application where everything was up and running up front, now we are breaking down this monolith into (micro)services architecture and everything is interconnected with the network. Although it might seem easy, done properly is not an easy as there are some challenges to address that was not in a monolith architecture. In this session, we’re going to start discussing what are these challenges (ie fault tolerance, service discovery, open tracing, or health checks) and demonstrate how they can be solved using Eclipse MicroProfile specification. Come to this session to learn how to develop a successful Kubernetes-Native application using Quarkus, a Java ecosystem way to develop cloud-first, container-native, serverless focused and Kubernetes optimized.

1. Kubernetes Native
with Quarkus
Alex Soto
Red Hat Engineer
@alexsotob

2. @alexsotob
2
Buenas tardes, buenas noches,
señoritas y señores
To be here with you tonight.
Brings me joy, que alegria
— Miguel
“

3. @alexsotob3
2000
RED HAT
LINUX
2007
KVM
2009
DEVOPS

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MyApp
Monolith

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Modules

12. @alexsotob12
Components

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Microservices

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Microservices

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Microservices

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Network of Services

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Microservices Own Their Data

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Multiple Points of Entry

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Failure of a Service

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Cascading Failure

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Microservices’ilities + OpenShift
MyService
Monitoring
Tracing
API
Discovery
Invocation
Resilience
Pipeline
Authentication
Logging Elasticity

22. @alexsotob22
On Scale of 1 to 10
How would you rate
your pain?
— Baymax
“

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Alright,
we did not die today!
I’d call that
an unqualified success.
— Fear
“

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— nutrecht July
2018

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2019

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But wow!
Am I so ready
for this change.
— Anna
“

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Meet Quarkus
Supersonic
java

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What's this?
The streets are lined with
Little creatures laughing.
— Jack Skellington
“

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So who is this Quarkus—
and what’s all the fuss?
Up to 10x smaller, 100x
faster

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Enough love to go around.
develop
er

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Imperative and
reactive
Serverless
Live reload
Microservices
Fat jars
and native
executables
Optimized for
JAX-RS & JPA
(Hibernate) …

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Kubernetes Native

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My Friend? No.
He’s my accessory.
— Boo Peep
“

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@
@
</>
Build time
(maven,
gradle…)
How does a framework start?

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@
@
</>
Load config file from file
system
Parse it
How does a framework start?

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How does a framework start?
@
@
</>
Classpath scanning to
find
annotated classes
Attempt to load class to
enable/disable features

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How does a framework start?
@
@
</>
Build its model of
the world.

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How does a framework start?
@
@
</>
Start the
management
(thread, pool…)

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@
@
</>
The Quarkus Way
@
@
</>

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</>
The Quarkus Way - Closed-World Assumption
Limited
variability

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@
@
</>
The Quarkus Way - Benefits
No FS access at
runtime
No need for a
parser at runtime
No scanning at
runtime
Less reflection
and classloading
at runtime
Optimized config
Less reflection
(proxy generation)
Prepared
initialization
(ready to serve)

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@
@
</>
The Quarkus Way - You don’t use 1 framework
@
@
</>
@
@
</>
SubatomicSupersonic
Java

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Even miracles
take a little time.
— The fairy Godmother
“

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It's time to see
what I can do
To test the limits
and break through.
— Elsa
“

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Put on your Sunday clothes
there's lots of world
out there.
— Wall-E
“
[http://bit.ly/quarkus-cheat-sheet-site]
[https://quarkus.io/]

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What's the lesson?
What is the take-away?
— Maui
“

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On an island that I own
Tan and rested and alone
Surrounded by
enormous piles of money
— Eugene
“

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We can't understand her. She is from
the other studio. Aaaah.
— Moana, Anna, Vanellope
“

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But when I'm way up here
It's crystal clear
That now I'm in a whole
new world with you
— Jasmine
“
[http://bit.ly/quarkus-tutorial]

54. @alexsotob
Hay un amigo en mí,
cuando salgan a volar,
hay un amigo en mí
— Toy Story
“
@alexsotob
asotobue@redhat.com
http://www.lordofthejars.com/
lordofthejars