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Kratos provides a comprehensive set of components for building production-ready microservices. Each component is designed to be modular, extensible, and follows Go best practices.

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Core Components

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Transport Layer

The transport layer provides abstractions for different communication protocols:
  • Transport - Base transport interface and abstractions
  • HTTP - HTTP server and client implementation
  • gRPC - gRPC server and client implementation

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Application Infrastructure

  • Middleware - Middleware system for HTTP and gRPC
  • Config - Configuration management with multiple sources
  • Log - Structured logging system
  • Errors - Error handling with codes and metadata

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Data Handling

  • Encoding - Content encoding/decoding (JSON, XML, YAML, Proto, Form)

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Service Discovery

  • Registry - Service registration and discovery
  • Selector - Load balancing and service selection
  • Metadata - Request/response metadata handling

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Design Principles

All Kratos components follow these principles:

Interface-Based

Components are defined by interfaces, making them easily testable and replaceable

Context-Aware

All operations accept context.Context for cancellation and metadata propagation

Extensible

Components can be extended through options pattern and middleware

Production-Ready

Built with reliability, observability, and performance in mind

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Getting Started

Explore individual component documentation to learn about their interfaces, configuration options, and usage patterns.

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