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kratos/README.md

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![kratos](docs/images/kratos.png)
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[![Language](https://img.shields.io/badge/Language-Go-blue.svg)](https://golang.org/)
[![Build Status](https://github.com/go-kratos/kratos/workflows/Go/badge.svg)](https://github.com/go-kratos/kratos/actions)
[![GoDoc](https://pkg.go.dev/badge/github.com/go-kratos/kratos/v2)](https://pkg.go.dev/github.com/go-kratos/kratos/v2)
[![Go Report Card](https://goreportcard.com/badge/github.com/go-kratos/kratos/v2)](https://goreportcard.com/report/github.com/go-kratos/kratos/v2)
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[![Discord](https://img.shields.io/discord/766619759214854164?label=chat&logo=discord)](https://discord.gg/BWzJsUJ)
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# Kratos
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Kratos 一套轻量级 Go 微服务框架,包含大量微服务相关框架及工具。
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> 名字来源于:《战神》游戏以希腊神话为背景,讲述由凡人成为战神的奎托斯(Kratos)成为战神并展开弑神屠杀的冒险历程。
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## Goals
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我们致力于提供完整的微服务研发体验,整合相关框架及工具后,微服务治理相关部分可对整体业务开发周期无感,从而更加聚焦于业务交付。对每位开发者而言,整套 Kratos 框架也是不错的学习仓库,可以了解和参考到微服务方面的技术积累和经验。
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### Principles
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* 简单:不过度设计,代码平实简单;
* 通用:通用业务开发所需要的基础库的功能;
* 高效:提高业务迭代的效率;
* 稳定:基础库可测试性高,覆盖率高,有线上实践安全可靠;
* 健壮:通过良好的基础库设计,减少错用;
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* 高性能:性能高,但不特定为了性能做 hack 优化,引入 unsafe ;
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* 扩展性:良好的接口设计,来扩展实现,或者通过新增基础库目录来扩展功能;
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* 容错性:为失败设计,大量引入对 SRE 的理解,鲁棒性高;
* 工具链:包含大量工具链,比如 cache 代码生成,lint 工具等等;
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## Features
* APIs:协议通信以 HTTP/gRPC 为基础,通过 Protobuf 进行定义;
* Errors:通过 Protobuf 的 Enum 作为错误码定义,以及工具生成判定接口;
* Metadata:在协议通信 HTTP/gRPC 中,通过 Middleware 规范化服务元信息传递;
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* Config:支持多数据源方式,进行配置合并铺平,通过 Atomic 方式支持动态配置;
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* Logger:标准日志接口,可方便集成三方 log 库,并可通过 fluentd 收集日志;
* Metrics:统一指标接口,可以实现各种指标系统,默认集成 Prometheus;
* Tracing:遵循 OpenTracing 规范定义,以实现微服务链路追踪;
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* Encoding:支持 Accept 和 Content-Type 进行自动选择内容编码;
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* Transport:通用的 HTTP/gRPC 传输层,实现统一的 Middleware 插件支持;
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* Registry:实现统一注册中心接口,可插件化对接各种注册中心;
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## Getting Started
### Required
- [go](https://golang.org/dl/)
- [protoc](https://github.com/protocolbuffers/protobuf)
- [protoc-gen-go](https://github.com/protocolbuffers/protobuf-go)
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### Installing
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```
go get github.com/go-kratos/kratos/cmd/kratos/v2
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```
### Create a service
```
# 创建项目模板
kratos new helloworld
cd helloworld
# 生成proto模板
kratos proto add api/helloworld/helloworld.proto
# 生成proto源码
kratos proto client api/helloworld/helloworld.proto
# 生成server模板
kratos proto server api/helloworld/helloworld.proto -t internal/service
# 编译成可执行文件
cd /cmd/helloworld
go build
# 运行程序
./helloword
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```
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### Kratos Boot
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```
import "github.com/go-kratos/kratos/v2"
import "github.com/go-kratos/kratos/v2/transport/grpc"
import "github.com/go-kratos/kratos/v2/transport/http"
httpSrv := http.NewServer(http.Address(":8000"))
grpcSrv := grpc.NewServer(grpc.Address(":9000"))
app := kratos.New(
kratos.Name("kratos"),
kratos.Version("latest"),
kratos.Server(httpSrv, grpcSrv),
)
app.Run()
```
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## Related
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* [Docs](https://go-kratos.dev/)
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* [Examples](https://github.com/go-kratos/examples)
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* [Service Layout](https://github.com/go-kratos/kratos-layout)
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## Community
* [Wechat Group](https://github.com/go-kratos/kratos/issues/682)
* [Discord Group](https://discord.gg/BWzJsUJ)
* QQ Group: 716486124
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## Sponsors and Backers
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![kratos](docs/images/alipay.png)
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## License
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Kratos is MIT licensed. See the [LICENSE](./LICENSE) file for details.