开源的云原生开发平台：Micro

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介绍

随着“微服务”在企业里的广泛采用，如何快速的创建标准微服务成为一个问题。Micro为了我们提供了思路。

Micro由4部分组成：

• Server：Micro本身的服务端
• Framework：开发框架
• Command Line：命令行
• Environments：用于切换环境和多租户

Micro服务器端架构

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Micro框架架构

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Micro使用样例

1. 本地运行server端：

micro server

2. 切换到本地环境 (127.0.0.1:8081)

micro env set local

3. 登录服务端

micro login

4. 创建微服务

# generate a service (follow instructions in output)
micro new helloworld

# run the service
micro run helloworld

# check the status
micro status

# list running services
micro services

# call the service
micro helloworld --name=Alice

# curl via the api
curl -d '{"name": "Alice"}' http://localhost:8080/helloworld

开发微服务

Micro的开发框架内置了Grpc的支持。3步开发微服务：

1. 定义PB文件

syntax = "proto3";

package helloworld;

service Helloworld {
    rpc Call(Request) returns (Response) {}
}

message Request {
    string name = 1;
}

message Response {
    string msg = 1;
}

2. 服务器端

package main

import (
    "context"
  
    "github.com/micro/micro/v3/service"
    "github.com/micro/micro/v3/service/logger"
    pb "github.com/micro/services/helloworld/proto"
)

type Helloworld struct{}

// Call is a single request handler called via client.Call or the generated client code
func (h *Helloworld) Call(ctx context.Context, req *pb.Request, rsp *pb.Response) error {
    logger.Info("Received Helloworld.Call request")
    rsp.Msg = "Hello " + req.Name
    return nil
}

func main() {
    // Create service
    srv := service.New(
        service.Name("helloworld"),
    )

    // Register Handler
    srv.Handle(new(Helloworld))

    // Run the service
    if err := srv.Run(); err != nil {
        logger.Fatal(err)
    }
}

3. 开发客户端

import (
    "context"
  
    "github.com/micro/micro/v3/service/client"
    pb "github.com/micro/services/helloworld/proto"
)

// create a new helloworld service client
helloworld := pb.NewHelloworldService("helloworld", client.DefaultClient) 

// call the endpoint Helloworld.Call
rsp, err := helloworld.Call(context.Background(), &pb.Request{Name: "Alice"})