go-micro是基于 Go 语言用于开发的微服务的 RPC 框架,主要功能如下:
服务发现,负载均衡 ,消息编码,请求/响应,Async Messaging,可插拔接口,最后这个功能牛p
安装步骤
安装protobuf
protobuf是谷歌提供的一种高效的协议数据交换格式工具库,类似于xml,json,但是相比他们更高效,体积更小
地址:https://github.com/protocolbuffers/protobuf/releases,找到对应的版本下载,解压,并配置环境变量,我在Ubuntu下
操作
方法如下
#下载
https://github.com/protocolbuffers/protobuf/releases/download/v3.17.3/protoc-3.17.3-linux-x86_64.zip
#解压 目录/usr/local
unzip protoc-3.17.3-linux-x86_64.zip
#设置环境变量 ~/.bashrc文件下
export PATH=$PATH:/usr/local/protoc/bin
#生效
source ~/.bashrc
下载相关的依赖
go get -u github.com/golang/protobuf/proto
go get -u github.com/golang/protobuf/protoc-gen-go
//go get github.com/micro/micro/v3/cmd/protoc-gen-micro
go get github.com/asim/go-micro/cmd/protoc-gen-micro/v3
安装v3版本的micro
go get github.com/micro/micro/v3
安装二进制文件
#linuxr操作
wget -q https://raw.githubusercontent.com/micro/micro/master/scripts/install.sh -O - | /bin/bash
基本操作
帮助命令
micro -h
#命令如下
auth Manage authentication, accounts and rules
call Call a service e.g micro call greeter Say.Hello '{"name": "John"}'
cli Run the interactive CLI
config Manage configuration values
env Get/set micro cli environment
gen Generate a micro related dependencies e.g protobuf
get Get resources from micro
health Get the service health
init Generate a profile for micro plugins
kill Kill a service: micro kill [source]
login Interactive login flow.
logout Logout.
logs Get logs for a service e.g. micro logs helloworld
network Manage the micro service network
new Create a service template
run Run a service: micro run [source]
server Run the micro server
service Run a micro service
services List services in the registry
stats Query the stats of specified service(s), e.g micro stats srv1 srv2 srv3
status Get the status of services
store Commands for accessing the store
stream Create a service stream e.g. micro stream foo Bar.Baz '{"key": "value"}'
update Update a service: micro update [source]
user Print the current logged in user
help, h Shows a list of commands or help for one command运行服务
micro server
登录: 用户名: admin 密码:micro
micro login
登录成功后可以查看服务
micro servers
#显示如下
api auth broker config events network proxy registry runtime server store
查看运行状态
micro status
查看日志
micro logs 服务名
创建服务
micro new 服务名
创建服务案例
编写hello.proto文件
//目录路径: /mnt/d/go/go-micro/proto/hello.proto
syntax = "proto3";
//如果不加会报错
//说明:option go_package = "path;name";
//path 表示生成的go文件的存放地址，会自动生成目录的。
//name 表示生成的go文件所属的包名
option go_package="./;hello";
//结构体
message InfoRequest{
string username=1;
}
message InfoResponse{
string msg=2;
}
//定论接口
service Hello{
rpc Info(InfoRequest)returns (InfoResponse);
}
在proto文件所在的目录生成对应的go文件
命令如下:会在当前目录下生成hell.pb.go文件
protoc --proto_path= . --micro_out=. --go_out=. ./hello.proto
编写一 个server文件测试
//文件路径:/mnt/d/go/go-micro/proto/server.go
//代码如下
package main
import (
"fmt"
"github.com/asim/go-micro/v3"
"context"
proto "test/go-micro/proto"
)
/*
Example usage of top level service initialisation
*/
type Greeter struct{}
func (g *Greeter) Hello(ctx context.Context, req *proto.Request, rsp *proto.Response) error {
rsp.Greeting = "Hello " + req.Name
return nil
}
func main() {
// 创建一个服务
service := micro.NewService(
micro.Name("greeter"),
micro.Address(":8081"),
micro.Version("latest"),
micro.Metadata(map[string]string{
"type": "helloworld",
"content-type":"application/json",
}),
)
//初始化
service.Init(
)
// 注册服务
proto.RegisterGreeterHandler(service.Server(), new(Greeter))
// 启动服务
if err := service.Run(); err != nil {
fmt.Println(err)
}
}
客户端调用
命令如下:
micro call greeter Greeter.Hello '{"name": "John"}'
返回值如下:
{ "greeting": "Hello John" }
不迷路操作
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