Go-Chassis is a microservice framework for rapid development of microservices in Go

Why use Go chassis

go chassis is designed as a protocol-independent framework, any protocol is able to integrate with go chassis and leverage same function like load balancing, circuit breaker,rate limiting, routing management, those function resilient your service

go chassis makes service observable by bring open tracing and prometheus to it.

go chassis is flexible, many different modules can be replaced by other implementation, like registry, metrics, handler chain, config center etc

With many build-in function like route management, circuit breaker, load balancing, monitoring etc, your don't need to investigate, implement and integrate many solutions yourself.

go chassis supports Istio platform, Although Istio is a great platform with a service mesh in data plane, it surely decrease the throughput and increase the latency of your service go chassis can bring better performance to go program, you can use Istio configurations to control go chassis.

Go chassis also has a service mesh solution https://github.com/go-mesh/mesher, it is build on top of go chassis. you can use same registry, configuration to goven all of service written in different language.

Features

• Pluggable registrator and discovery service: Support Service center, istio pilot, kubernetes and file based registry, fit both client side discovery and server side discovery pattern
• Pluggable Protocol: You can custom your own protocol, by default support http and grpc
• Multiple server management: you can separate API by protocols and ports
• Circuit breaker: Protect your micro service system in runtime
• Route management: Able to route to different service based on weight and match rule to achieve Canary Release easily
• Client side Load balancing: Able to custom strategy
• Rate limiting: Both client side and server side rate limiting
• Pluggable Cipher: Able to custom your own cipher for AKSK and TLS certs
• Handler Chain: Able to add your own code during service calling for client and server side
• Metrics: Able to expose Prometheus metric API automatically and custom metrics reporter
• Tracing:Use opentracing-go as standard library, easy to integrate tracing impl
• Logger: You can custom your own writer to sink log, by default support file and stdout
• Hot-reconfiguraion: Powered by go-archaius, configurations can be reload in runtime, like load balancing, circuit breaker, rate limiting
• Dynamic Configuration framework: Powered by go-archaius, developer is able to develop a service which has hot-reconfiguration feature easily
• Fault Injection: In consumer side, you can inject faults to bring chaos testing into your system

You can check plugins to see more features

Quick Start

You can see more documentations in here, this doc is for latest version of go chassis, if you want to see your version's doc, follow here to generate it

1. Install go 1.10+

2. Clone the project

git clone git@github.com:go-chassis/go-chassis.git

1. Use go mod(go 1.11+, experimental but a recommended way)

cd go-chassis
export GO111MODULE=on 
go mod download
#optional
export GO111MODULE=on 
go mod vendor

NOTICE：if you do not use mod, We can not ensure you the compatibility. however you can still maintain your own vendor, which means you have to solve compiling issue your own.

1. Install service-center

2. Write your first http micro service

Examples

You can check examples here

NOTICE: Now examples is migrating to here

Communication Protocols

Go-Chassis supports 3 types of communication protocol.

1. Rest - REST is an approach that leverages the HTTP protocol for communication.
2. Highway - This is a RPC communication protocol, it was deprecated.
3. grpc - native grpc protocol, go chassis bring circuit breaker, route management etc to grpc.

Debug suggestion for dlv:

Add -tags debug into go build arguments before debugging, if your go version is go1.10 onward.

example:

go build -tags debug -o server -gcflags "all=-N -l" server.go

Chassis customized debug tag to resolve dlv debug issue:

https://github.com/golang/go/issues/23733

https://github.com/derekparker/delve/issues/865

Eco system

this part introduce some eco systems that go chassis can run with

Apache ServiceComb

With ServiceComb service center as registry, go chassis supply more features like contract management and multiple service registry, highly recommended. that will not prevent you from using kubernetes or Istio, Because service center can aggregate heterogeneous registry and give you a unified service registry entry point.

Kubenetes and Istio

go chassis has k8s registry and Istio registry plugins, and support Istio traffic management you can use spring cloud or Envoy with go chassis under same service discovery service.