Microservice architecture

As explained in Software Security for Developers

A software architecture that decomposes an application into independently deployable services organized around business capabilities.

Microservice architecture decomposes an application into services organized around business capabilities. Each service exposes a user interface or API, contains its business logic, and can be deployed independently; any required database remains private to that service. section 3.1

Figure 3.1 Potential microservices that can be spotted on a product page: product-search microservice, look-inside microservice, book-details microservice (title, author, publication date, and summary), product-rating microservice, pricing microservice that can calculate discounts dynamically, and delivery-estimation microservice that estimates when an order will arrive at a customer’s address and the shipping costs

A product page can be divided into product-search, book-details, pricing, ratings, look-inside, and delivery-estimation microservices. section 3.1

Product page call chain

A product-page service calls book-details, pricing, and delivery-estimation services over HTTP. The request can fan out through multiple layers, creating a service-to-service call graph that must authenticate services and protect communication channels. section 3.1 section 3.0

How Software Security for Developers covers it

How deep it goes

Defines service boundaries and illustrates call-graph complexity, then focuses on communication security rather than deployment mechanics.

Examples

Uses an online product page with book-details, pricing, ratings, search, and delivery-estimation services.

What it assumes

Assumes familiarity with applications and APIs while introducing business capabilities, independently deployable services, and service-to-service calls.

What you can do after

Evaluate service boundaries and identify authentication and communication risks across a service-to-service call graph.

How it connects

Connects business capabilities, REST APIs, private databases, HTTP, service identity, API gateways, and service meshes.

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Also explained in

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  Bootstrapping Microservices, Second Edition: With Docker, Kubernetes, GitHub Actions, and TerraformAn architectural style that structures an application as a collection of small, independently deployable services with distinct boundaries.
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  Google Anthos in ActionA microservices architecture structures an application as independently deployable services that communicate over a network.
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  gRPC Microservices in GoMicroservice architecture is an architectural style that structures an application as loosely coupled, independently deployable, and independently scalable services.
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  Cloud Observability in ActionA microservices application is an application composed of independently deployable services that communicate over interfaces.
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  Think Like a CTOA microservices architecture structures a system as independently deployable services that are narrowly scoped and communicate through defined interfaces.
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  AI Agents in Action, Second EditionA microservices architecture is a software architecture in which an application is composed of independently deployable services with focused responsibilities.
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  Go in Practice, Second EditionA microservice architecture is an application architecture composed of independently deployable services that communicate over a network.
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  Kubernetes for DevelopersMicroservices is an architectural pattern that structures an application as multiple independently maintained services.
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  Kubernetes in Action, Second EditionA microservice architecture structures an application as multiple independently deployable services that collaborate through defined interfaces.
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  Kafka for ArchitectsMicroservices architecture is an architectural style composed of independently deployable services organized around separate capabilities.
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  Python Concurrency with asyncioMicroservice architecture is a system design style that structures an application as a set of independently deployable services communicating over defined interfaces.
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  BDD in Action, Second EditionMicroservice architecture is an application architecture in which independently deployable services implement separate business capabilities and communicate through defined interfaces.
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  Authorization in ActionMicroservices is an architectural pattern in which an application is composed of independently deployable services that communicate over a network.

Compare how 14 books explain microservice architecture →

Related concepts

• monolithic architecturealternative to · Monolithic architecture is a software architecture in which an application's major functionality is organized and deployed as a single integrated unit.
• distributed systemkind of · A distributed system is a computing system whose components run across multiple networked processes or machines and coordinate through communication.
• autonomyproduces · Autonomy is the capacity or degree to make decisions and act independently within a defined responsibility or set of limits.
• servicehas part · A service is a capability or activity provided by an entity to meet the needs of users or other components.
• fast flowproduces · Fast flow is the rapid, sustainable movement of work through a value stream, supported by minimal delays and timely feedback.

This explainer was generated by Manning's knowledge graph from the text of Software Security for Developers. The section links point to the parts of the book it draws on.