GeekOut - Configuration Management with Kubernetes, a Spring-Boot use-case

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Come discover what options Kubernetes allows in terms of configuration management! Docker images are supposed to (and should be) immutable. Given that the same image should be promoted from the development environment to the production environment, it needs to be parameterized in each environment. Kubernetes provides different ways to do that. On the other, the Spring Boot platform allows a wide range of configuration options. In this talk, I’ll go through (and demo!) what common options are available, and what pro(s)/con(s) each of them have.

Software

@nicolas_frankel
A Spring Boot use-case
Configuration Management
with Kubernetes

@nicolas_frankel
• Developer, team lead, architect,
whatever it takes
• Recently Developer Advocate
• DevOps believer
• Curious about Kubernetes
Me, myself and I

@nicolas_frankel
Hazelcast
HAZELCAST IMDG is an operational,
in-memory, distributed computing
platform that manages data using
in-memory storage, and performs
parallel execution for breakthrough
application speed and scale.
HAZELCAST JET is the ultra fast,
application embeddable, 3rd
generation stream processing
engine for low latency batch
and stream processing.

@nicolas_frankel
Configuration management
“Configuration management (CM) is a systems
engineering process for establishing and
maintaining consistency of a product's
performance, functional, and physical
attributes with its requirements, design, and
operational information throughout its life.”
-- https://en.wikipedia.org/wiki/Configuration_management

@nicolas_frankel
• Custom scripts
• Puppet
• Chef
• Ansible
• SaltStack
• etc.
“Traditional” CM tools

@nicolas_frankel
• Those tools address mutability
drifts
• Not immutable container images!
• Now what?
The curious case of immutability

@nicolas_frankel
• What environment is the
application deployed on?
• Banner with name/background
color if not production
Use-case
STAGING

@nicolas_frankel
• Open Source
• Built on top of Spring Framework
• Convention over configuration
• “Magic”
Spring Boot 101

@nicolas_frankel
• Property in YAML file
• Accessed via
• Environment injection
• Value injection
• Configuration injection
Spring configuration 101

@nicolas_frankel
• Configuration file inside the JAR
• application-xxx.properties
• Activated by adding a command-
line option
• --spring.profiles.active=xxx
Spring profiles 101

@nicolas_frankel
• Add args
• Override command-line
• Set environment variables
• Use environment from ConfigMap
• Mount volumes
• Query API server
Summary

@nicolas_frankel
• https://blog.frankel.ch/
• @nicolas_frankel
• https://git.io/fhNj9
• https://bit.ly/2VKNPIS
Thanks!

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GeekOut - Configuration Management with Kubernetes, a Spring-Boot use-case

1. @nicolas_frankel A Spring Boot use-case Configuration Management with Kubernetes

2. @nicolas_frankel • Developer, team lead, architect, whatever it takes • Recently Developer Advocate • DevOps believer • Curious about Kubernetes Me, myself and I

3. @nicolas_frankel Hazelcast HAZELCAST IMDG is an operational, in-memory, distributed computing platform that manages data using in-memory storage, and performs parallel execution for breakthrough application speed and scale. HAZELCAST JET is the ultra fast, application embeddable, 3rd generation stream processing engine for low latency batch and stream processing.

4. @nicolas_frankel Configuration management “Configuration management (CM) is a systems engineering process for establishing and maintaining consistency of a product's performance, functional, and physical attributes with its requirements, design, and operational information throughout its life.” -- https://en.wikipedia.org/wiki/Configuration_management

5. @nicolas_frankel • Custom scripts • Puppet • Chef • Ansible • SaltStack • etc. “Traditional” CM tools

6. @nicolas_frankel • Those tools address mutability drifts • Not immutable container images! • Now what? The curious case of immutability

7. @nicolas_frankel • What environment is the application deployed on? • Banner with name/background color if not production Use-case STAGING

8. @nicolas_frankel • Open Source • Built on top of Spring Framework • Convention over configuration • “Magic” Spring Boot 101

9. @nicolas_frankel • Property in YAML file • Accessed via • Environment injection • Value injection • Configuration injection Spring configuration 101

10. @nicolas_frankel • Configuration file inside the JAR • application-xxx.properties • Activated by adding a command- line option • --spring.profiles.active=xxx Spring profiles 101

11. @nicolas_frankel

12. @nicolas_frankel • Add args • Override command-line • Set environment variables • Use environment from ConfigMap • Mount volumes • Query API server Summary

13. @nicolas_frankel • https://blog.frankel.ch/ • @nicolas_frankel • https://git.io/fhNj9 • https://bit.ly/2VKNPIS Thanks!

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