Running Spring Boot in Kubernetes and Intro to Helm

Transforming businesses that use technology
into technology organizations that do business.
KENZAN
Digital Consulting + Software Engineering
Spring Boot in K8s with Helm

About me Chuck Salazar
Kenzan
Sr. Backend
Engineer
Software Engineer
Carlos E. Salazar
Codesolt
Spring
programming
blog
Tech Speaker
Montreal, San
Antonio,
Barranquilla
Cloud
Native Gdl
Lead
Organizer

Agenda
Structure
Java & Spring
Demo
Architecture
Next Steps
1
3
4
5
6
K8s & Helm2

Java & Spring
Cloud Native
Java apps

Intro Docker & Kubernetes
Image from:
docker.com

Java Running in containers
● Maven/Gradle plugin: Jib
● OOTB JDK images
● JVM remote debugging
● JLink: custom JVM
● GraalVM

Spring Boot Running in containers
● Executable jar
● Embedded Tomcat
● All dependencies packaged
● In-app security
● Documentation with Swagger

Helm
Another Layer
on top of K8s?

K8s Advantages
● Open Source
● Run anywhere
● Auto scaling
● Self healing
● Service discovery
● Load balancing
● CNCF supported

K8s Challenges
● Manage and update multiple
configurations
● Deploy multiple apps as a
“single” definition
● Parametrize for multiple
environments
● Manage releases
● Validate deployment state

Helm
What is Helm?
● Helm Charts help you manage even the
most complex Kubernetes application.
● Helm is maintained by the CNCF - in
collaboration with Microsoft, Google,
Bitnami and the contributor
community.

Helm Why Helm?
● Open Source
● CNCF supported
● Manage dependencies
● Templated configurations
● Rollbacks
● Easy updates
● Easy to share
● Helm Hub

Helm Install (deploy)
Image from:
This Medium
post

Project Structure
Key concepts

Helm
Key concepts
● The chart is a bundle of information
necessary to create an instance of a
Kubernetes application.
● A release is a running instance of a chart,
combined with a specific config.
● The Helm Client is a command-line client
for end users.
● The Tiller Server is an in-cluster server
that interacts with the Helm client, and
interfaces with the Kubernetes API server.
● Helm Hub is a cloud public repository for
built Charts.

Architecture
Ok, how does
this work?

Helm Architecture
Image from this
Slideshare
Presentation

Helm Workflow
Install:
● brew install kubernetes-helm
● helm init
Create:
● helm create
● helm lint
● helm template
● helm install
● helm ls
● helm upgrade
● helm rollback
● helm delete
Search:
● helm search
● helm fetch
Distribute:
● helm package
● helm repo add
● helm install

Helm CI/CD
Image from this
webpage

Helm Chart Museum
● Open Source
● Helm Chart Repository
server
● Support for cloud storage
● Under Helm umbrella
● Maintained primarily by
Code Fresh

What to do next?
Next StepsHelm
Spring Boot in K8s
CI/CD
Integrate Helm and Chart Museum with Jenkins
Security
Add TLS to your Tiller connection
Hooks
Add automated hooks to your cluster

Delivering customized,
cloud-native, end-to-end
technology solutions that
drive business.
An Amdocs Company since 2017,
Kenzan was founded in 2004. We
have offices in Providence (RI), New
York (NY), Denver (CO), Los Angeles
(CA) and Guadalajara, MX.
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Transforming businesses that use
technology into technology
organizations that do business.
Digital Consulting + Software
Engineering
Spring Boot in K8s with Helm
Thanks!
Sao Paolo JUG
@chuucksc at Twitter
Carlos E. Salazar at Linkedin

Running Spring Boot in Kubernetes and Intro to Helm

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