Getting started with Oso Cloud

application architecture   architecting   security  

Contact me for information about consulting and training at your company.

The MEAP for Microservices Patterns 2nd edition is now available


I’ve just started working on the next article in the series about authentication and authorization in a microservice architecture. In contrast with part 3 and part 4, which describe hand-coded authorization logic, this article will explore a declarative approach using Oso Cloud as an external authorization service.

I’ve just committed some changes to the RealGuardIO example application that

  1. Defines an Oso Cloud policy document which captures the authorization rules for who can disarm a security system in the RealGuardIO application
  2. Uses the Oso Cloud CLI to define facts (ie. authorization data) for customers, employees, locations, security systems, and the relationships between them
  3. Runs some queries against the locally running Oso Dev Server to determine if a user is authorized to disarm a security system

To learn more, take a look at the README and the test script.


application architecture   architecting   security  


Copyright © 2025 Chris Richardson • All rights reserved • Supported by Kong.

About Microservices.io

Microservices.io is brought to you by Chris Richardson. Experienced software architect, author of POJOs in Action, the creator of the original CloudFoundry.com, and the author of Microservices patterns.

Microservices Patterns, 2nd edition

I am very excited to announce that the MEAP for the second edition of my book, Microservices Patterns is now available!

Learn more

ASK CHRIS

?

Got a question about microservices?

Fill in this form. If I can, I'll write a blog post that answers your question.

NEED HELP?

I help organizations improve agility and competitiveness through better software architecture.

Learn more about my consulting engagements, and training workshops.

LEARN about microservices

Chris offers numerous other resources for learning the microservice architecture.

Get the book: Microservices Patterns

Read Chris Richardson's book:

Example microservices applications

Want to see an example? Check out Chris Richardson's example applications. See code

Virtual bootcamp: Distributed data patterns in a microservice architecture

My virtual bootcamp, distributed data patterns in a microservice architecture, is now open for enrollment!

It covers the key distributed data management patterns including Saga, API Composition, and CQRS.

It consists of video lectures, code labs, and a weekly ask-me-anything video conference repeated in multiple timezones.

The regular price is $395/person but use coupon OFFEFKCW to sign up for $95 (valid until Sept 30th, 2025). There are deeper discounts for buying multiple seats.

Learn more

Learn how to create a service template and microservice chassis

Take a look at my Manning LiveProject that teaches you how to develop a service template and microservice chassis.

Signup for the newsletter


BUILD microservices

Ready to start using the microservice architecture?

Consulting services

Engage Chris to create a microservices adoption roadmap and help you define your microservice architecture,


The Eventuate platform

Use the Eventuate.io platform to tackle distributed data management challenges in your microservices architecture.

Eventuate is Chris's latest startup. It makes it easy to use the Saga pattern to manage transactions and the CQRS pattern to implement queries.


Join the microservices google group