About Microservices.io

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Microservices.io is created by Chris Richardson, software architect, creator of the original CloudFoundry.com, and author of Microservices Patterns. Chris advises organizations on modernization, architecture, and building systems that avoid becoming modern legacy systems.

Need help modernizing your architecture?

Avoid the trap of creating a modern legacy system — a new architecture with the same old problems.
Contact me to discuss your modernization goals.

Get Help

Microservices Patterns, 2nd edition

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

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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?

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

Learn more about my consulting engagements, and training workshops.

PREMIUM CONTENT

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Premium content now available for paid subscribers at premium.microservices.io.

MICROSERVICES WORKSHOPS

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Chris teaches comprehensive workshops for architects and developers that will enable your organization use microservices effectively.

Avoid the pitfalls of adopting microservices and learn essential topics, such as service decomposition and design and how to refactor a monolith to microservices.

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Remote consulting session

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Got a specific microservice architecture-related question? For example:

• Wondering whether your organization should adopt microservices?
• Want to know how to migrate your monolith to microservices?
• Facing a tricky microservice architecture design problem?

Consider signing up for a two hour, highly focussed, consulting session.

ASSESS your architecture

Assess your application's microservice architecture and identify what needs to be improved. Engage Chris to conduct an architect review.

LEARN about microservices

Get the book: Microservices Patterns

Read Chris Richardson's book: 👁 Image

Virtual bootcamp: Distributed data patterns in a microservice architecture

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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.

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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.

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For Email Marketing you can trust.

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,

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The Eventuate platform

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

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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.

The patterns

How to apply the patterns

Application architecture patterns

• Monolithic architecture
• Microservice architecture

Decomposition

• Decompose by business capability
• Decompose by subdomain
• Self-contained Servicenew
• Service per teamnew

Refactoring to microservicesnew

• Strangler Application
• Anti-corruption layer

Data management

• Database per Service
• Shared database
• Saga
• Command-side replica
• API Composition
• CQRS
• Domain event
• Event sourcing

Transactional messaging

• Transactional outbox
• Transaction log tailing
• Polling publisher

Testing

• Service Component Test
• Consumer-driven contract test
• Consumer-side contract test

Deployment patterns

• Multiple service instances per host
• Service instance per host
• Service instance per VM
• Service instance per Container
• Serverless deployment
• Service deployment platform

Cross cutting concerns

• Microservice chassis
• Service Template
• Externalized configuration

Communication style

• Remote Procedure Invocation
• Messaging
• Domain-specific protocol
• Idempotent Consumer

External API

• API gateway
• Backend for front-end

Service discovery

• Client-side discovery
• Server-side discovery
• Service registry
• Self registration
• 3rd party registration

Reliability

• Circuit Breaker

Security

• Access Token

Observability

• Log aggregation
• Application metrics
• Audit logging
• Distributed tracing
• Exception tracking
• Health check API
• Log deployments and changes

UI patterns

• Server-side page fragment composition
• Client-side UI composition