【go-zero】api与rpc使用etcd服务发现

准备代码

etcd先安装启动

目录结构
go mod init rpc/demo/v2

编写rpc

在user-rpc目录下
user.proto 文件
可使用goctl快速生成 goctl rpc -o user.proto

syntax = "proto3";

option go_package="./pb";
package pb;

message GetUserInfoReq {
  int64 id = 1;
}

message GetUserInfoResp {
  int64 id = 1;
  string nickname = 2;
}

service StreamGreeter {
  rpc getUserInfo(GetUserInfoReq) returns (GetUserInfoResp);
}

生成rpc项目

goctl rpc protoc .\user.proto --go_out=. --go-grpc_out=. --zrpc_out=.

编写etc目录下的user.yaml文件,一般会把127.0.0.1修改为0.0.0.0

Name: user.rpc
ListenOn: 0.0.0.0:8980
Etcd:
  Hosts:
  - 0.0.0.0:2379
  Key: user.rpc

写下业务代码 user-rpc/internal/logic/getuserinfologic.go

func (l *GetUserInfoLogic) GetUserInfo(in *pb.GetUserInfoReq) (*pb.GetUserInfoResp, error) {
	// todo: add your logic here and delete this line

	return &pb.GetUserInfoResp{
		Id:       in.Id,
		Nickname: "zero-rpc",
	}, nil
}

etcd开启 就可以启动rpc服务了

编写api

在user-api目录下
user-api.api文件

syntax = "v1"

info (
	title:  "dada"
	desc:   "使用api调用rpc"
	author: "akadod"
	email:  "aka.dod@yandex.com"
)

type request {
	UserId int64 `path:"userId"`
}

type response {
	Id   int64  `json:"id"`
	Name string `json:"name"`
}

service user-api {
	@handler GetUser // TODO: set handler name and delete this comment
	get /users/id/:userId (request) returns (response)

	@handler CreateUser // TODO: set handler name and delete this comment
	post /users/create (request)
}

生成api代码

goctl api go --api .\user-api.api --dir . --style goZero

添加etcd配置 编辑yaml文件

Name: user-api
Host: 0.0.0.0
Port: 8988
UserRpcConf:
  Etcd:
    Hosts:
      - 0.0.0.0:2379
    Key: user.rpc

config.go文件添加rpc配置

package config

import (
	"github.com/zeromicro/go-zero/rest"
	"github.com/zeromicro/go-zero/zrpc"
)

type Config struct {
	rest.RestConf
	UserRpcConf zrpc.RpcClientConf
}

编辑 user-api/internal/svc/serviceContext.go 文件

package svc

import (
	"github.com/zeromicro/go-zero/zrpc"
	"rpc/demo/v2/user-api/internal/config"
	"rpc/demo/v2/user-rpc/streamgreeter"
)

type ServiceContext struct {
	Config config.Config
	SsRpc  streamgreeter.StreamGreeter
}

func NewServiceContext(c config.Config) *ServiceContext {
	return &ServiceContext{
		Config: c,
		SsRpc:  streamgreeter.NewStreamGreeter(zrpc.MustNewClient(c.UserRpcConf)),
	}
}

编写getUserLogic.go 业务文件

package logic

import (
	"context"
	"rpc/demo/v2/user-rpc/streamgreeter"

	"rpc/demo/v2/user-api/internal/svc"
	"rpc/demo/v2/user-api/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type GetUserLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewGetUserLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetUserLogic {
	return &GetUserLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *GetUserLogic) GetUser(req *types.Request) (resp *types.Response, err error) {
	// todo: add your logic here and delete this line
	userResp, err := l.svcCtx.SsRpc.GetUserInfo(l.ctx, &streamgreeter.GetUserInfoReq{Id: req.UserId})
	if err != nil {
		return nil, err
	}
	return &types.Response{
		Id:   userResp.Id,
		Name: userResp.Nickname,
	}, nil
}

启动api服务

测试

通过直连

rpc把Etcd配置删掉
user.yaml

Name: user.rpc
ListenOn: 0.0.0.0:8980
Mode: dev

api修改配置文件
user-api.api

Name: user-api
Host: 0.0.0.0
Port: 8988
UserRpcConf:
  Endpoints:
    - 127.0.0.1:8980