go-kratos/kratos

Kratos is a Go (Golang) framework for building microservices, a software architecture pattern where an application is split into small, independently running services that communicate over a network. It is designed for cloud-native environments, meaning it is built to run reliably on cloud infrastructure at scale. The framework bundles together the plumbing that every microservice needs but no one wants to write from scratch: network communication over HTTP and gRPC (a high-performance protocol commonly used between backend services), middleware for tracing requests across services, collecting metrics for monitoring, and automatically recovering from crashes. It also handles service discovery (so services can find each other), configuration management, structured logging, and request validation. API documentation in the form of Swagger UI is generated automatically. It uses Protobuf, a structured data definition format, as the central source of truth for defining APIs, errors, and validation rules, and generates code from those definitions. You would use Kratos when building a large Go backend that is broken into multiple separate services and needs production-grade reliability features without assembling them piece by piece. It is well suited for teams that want a batteries-included framework rather than building custom infrastructure. A command-line tool and project template are provided to get started quickly. The framework is written in Go and designed around Go idioms.