gin+go-micro+etcd实战一

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

这篇主要介绍服务注册和发现的实现

etcd的安装方式:https://etcd.io/

当部署完etcd以后会显示

etcd的默认客户端端口是2379，接下来就可以使用etcd做服务注册、服务发现

go环境：go-micro gin

目录结构

userserver/main.go

 1 package main
 2 
 3 import (
 4     "github.com/micro/go-micro/registry"
 5     "github.com/micro/go-micro/registry/etcd"
 6     "github.com/micro/go-micro/web"
 7     "userserver/routers"
 8 )
 9 
10 var etcdReg registry.Registry
11 
12 
13 // 注册到etcd
14 func init(){
15     etcdReg = etcd.NewRegistry(
16         registry.Addrs("127.0.0.1:2379"),
17     )
18 }
19 
20 func main(){
21     // 初始化路由
22     router := routers.InitRouter()
23     microService := web.NewService(
24         web.Name("api.miku.com.userserver"),
25         web.Address(":10001"),
26         web.Handler(router),
27         web.Registry(etcdReg),
28     )
29     microService.Run()
30 }

userserver/router.go

 1 package routers
 2 
 3 import (
 4     "github.com/gin-gonic/gin"
 5     "net/http"
 6 )
 7 
 8 func InitRouter()*gin.Engine{
 9     ginRouter := gin.Default()
10     ginRouter.POST("/users", func(context *gin.Context) {
11         context.JSON(http.StatusOK,gin.H{
12             "code": 200,
13             "m g": "请求成功",
14         })
15     })
16     return ginRouter
17 }

orderserver/main.go 中实现了服务发现

 1 package main
 2 
 3 import (
 4     "bytes"
 5     "fmt"
 6     "github.com/micro/go-micro/client/selector"
 7     "github.com/micro/go-micro/registry"
 8     "github.com/micro/go-micro/registry/etcd"
 9     "github.com/micro/go-micro/web"
10     "net/http"
11     "orderserver/router"
12     "time"
13 )
14 
15 var etcdReg registry.Registry
16 
17 func init(){
18     etcdReg = etcd.NewRegistry(
19         registry.Addrs("127.0.0.1:2379"),
20     )
21 }
22 
23 func main(){
24     ginRouter := router.InitRouter()
25     microServce := web.NewService(
26         web.Name("api.miku.com.orderserver"),
27         web.Address(":10082"),
28         web.Handler(ginRouter),
29         web.Registry(etcdReg),
30     )
31     // 获取服务地址
32     hostAddress := GetServiceAddr("api.miku.com.userserver")
33     if len(hostAddress) <= 0 {
34         fmt.Println("hostAddress is null")
35     }else{
36         url := "http://" + hostAddress + "/users"
37         fmt.Println(url)
38         resp, _ := http.Post(url,"application/json;charset=utf-8",bytes.NewBuffer([]byte("")))
39         fmt.Println(resp)
40     }
41     microServce.Run()
42 }
43 
44 // 获取服务地址
45 func GetServiceAddr(serviceName string)(address string){
46     var retryCount  int
47     for {
48         servers,err := etcdReg.GetService(serviceName)
49         if err != nil{
50             fmt.Println(err.Error())
51         }
52         var services []*registry.Service
53         for _,value := range servers{
54             fmt.Println(value.Name, ":", value.Version)
55             services = append(services, value)
56         }
57         next := selector.RoundRobin(services)
58         if node, err := next();err == nil{
59             address = node.Address
60         }
61         if len(address) > 0 {
62             return
63         }
64         // 重试次数
65         retryCount  ++
66         time.Sleep(time.Second * 3)
67         if retryCount  >= 5{
68             return
69         }
70     }
71 }

 1 package router
 2 
 3 import (
 4     "github.com/gin-gonic/gin"
 5     "net/http"
 6 )
 7 
 8 func InitRouter()*gin.Engine{
 9     ginRouter := gin.Default()
10     ginRouter.POST("/orders/", func(c *gin.Context) {
11         c.String(http.StatusOK,"get orderinfo")
12     })
13     return ginRouter
14 }