Spring Cloud Kubernetes: An Easier Path from Idea to Production

Dec 19, 20191 like482 views

Kubernetes might be a dream for operations teams willing to learn its intricacies, but it can be a nightmare for developers whose primary goal is getting working applications into production. Spring Cloud Kubernetes addresses developers’ needs by making it simple to deploy Spring Cloud and Spring Boot applications into Kubernetes environments. This webinar will explore some key Spring Cloud Kubernetes concepts and demonstrate the process of porting an existing application onto a Kubernetes cluster.

1
© 2019 Pivotal
Spring Cloud
on Kubernetes
Alexandre Roman, Platform Architect, Pivotal Inc.
@Alexandre_Roman
Ryan Baxter, Software Engineer, Pivotal Inc.
@ryanjbaxter

2
Who are we?
➔ Alexandre Roman
Platform Architect, Pivotal (Paris)
aroman@pivotal.io
github.com/alexandreroman
@Alexandre_Roman
➔ Ryan Baxter
Spring Cloud Software Engineer, Pivotal (Boston)
github.com/ryanjbaxter
@ryanjbaxter

3
Agenda
▪ Who are we?
▪ What is Spring Cloud Kubernetes?
▪ Demo time!
▪ “Native Kubernetes Implementations”

6
Spring Boot and Containers
https://spring.io/guides/gs/spring-boot-docker/
But the management…...

8
Spring Boot + Cloud & Docker + Kubernetes

10
Why Spring Cloud Kubernetes?
Write portable apps using Spring Cloud
➔ Same source code for diﬀerent environments
➔ No matter which environment you use, Spring Cloud provides the right platform abstraction
➔ Seamless integration between Kubernetes and Spring
➔ Spring Cloud Kubernetes is GA since February 2019

11
Spring Cloud nicely ﬁts with Kubernetes
ConﬁgMap/Secret support
➔ Hot reload your app when you
update your conﬁguration
➔ Inject external conﬁguration
properties using ConfigMap
➔ Map Spring conﬁg support with
ConfigMap: @Values,
@ConfigurationProperties
➔ Load Secret values into your
beans
Native service discovery
➔ Leverage Spring Cloud Netﬂix,
without using an Eureka
instance
➔ DiscoveryClient uses
Kubernetes DNS resolver and
cluster events
➔ Use @LoadBalanced and
LoadBalancerClient for
client-side load balancing across
running pods
➔ Spring Cloud Circuitbreaker
support (Hystrix and
Resilience4j)
Pod health indicator
➔ Pod health indicator contributes
to Health actuator:
/actuator/health
Kubernetes awareness
➔ When your app is running in
Kubernetes, proﬁle
kubernetes is automatically
enabled for custom
conﬁguration

13
What you’re about to see
Deploy a Cloud-native app to Kubernetes
➔ Deployment Generation
➔ Service Discovery
➔ Load Balancing
➔ Conﬁguration

15
Under The Covers
App
Spring Cloud
K8S
K8S API Server
K8S API
Client
This requires the App
to have permissions to
use the K8S API

16
Use what is right for the situation
Use Spring Cloud Kubernetes
➔ Existing Spring Cloud apps
◆ Uses client side load balancing
◆ Uses Discovery Client
➔ Is OK to use the Kubernetes API server directly
Use Kubernetes
➔ Just planning on running on Kubernetes
➔ Familiar with Kubernetes

17
Stay Connected.
@ryanjbaxter
@Alexandre_Roman
Source code: github.com/ryanjbaxter/spring-cloud-k8s-demo

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