GO 微服务GO-Micro（7）个人学习笔记记录：把微服务注册到Consul 命令行和代码形式

widows环境下的Consul安装

.1 安装consul -

• windows：直接官网下载consul.exe可执行程序

.2 运行consul启动Consul agent的开发模式

PS:此模式是启动一个单节点的consul，且为集群的领袖
下载好文件后解压到目录下：

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启动：

D:\gongju> .\consul.exe agent -dev

结果：

D:\gongju> .\consul.exe agent -dev
==> Starting Consul agent...
           Version: '1.9.1'
           Node ID: 'd65e4c42-8cbf-ac87-6ff1-fc410890182f'
         Node name: 'DESKTOP-16CKEN1'
        Datacenter: 'dc1' (Segment: '')
            Server: true (Bootstrap: false)
       Client Addr: [127.0.0.1] (HTTP: 8500, HTTPS: -1, gRPC: 8502, DNS: 8600)
      Cluster Addr: 127.0.0.1 (LAN: 8301, WAN: 8302)
           Encrypt: Gossip: false, TLS-Outgoing: false, TLS-Incoming: false, Auto-Encrypt-TLS: false

.3 查看Consul集群的成员：打开另一个终端执行：

PS D:\gongju> .\consul.exe members
Node             Address         Status  Type    Build  Protocol  DC   Segment
DESKTOP-16CKEN1  127.0.0.1:8301  alive   server  1.9.1  2         dc1  
PS D:\gongju>

修改微服务的启动的代码

.1 注册中心使用默认的MDSN的时候的代码

package main

import (
    log "github.com/micro/go-micro/v2/logger"
    "github.com/micro/go-micro/v2"
    "greeter/handler"
    "greeter/subscriber"

    greeter "greeter/proto/greeter"
)

func main() {

    

    // New Service
    service := micro.NewService(
        micro.Name("go.micro.service.greeter"),
        micro.Version("latest"),
    )

    // Initialise service
    service.Init()

    // Register Handler
    _ = greeter.RegisterGreeterHandler(service.Server(), new(handler.Greeter))

    // Register Struct as Subscriber
    _ =micro.RegisterSubscriber("go.micro.service.greeter", service.Server(), new(subscriber.Greeter))

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

.2 修改注册中心启动为cousul:

微服务里面最好是使用启动忽略应用

 _ "github.com/micro/go-plugins/registry/consul/v2"

安装依赖，注意是再所在的微服务的目录下进行安装：

D:\code\go\Mi_Onse\greeter>go get github.com/micro/go-plugins
go: github.com/micro/go-plugins upgrade => v1.5.1

1 ）命令行的形式启动的服务的时候，指定注册到服务注册中心

命令 1：

D:\code\go\Mi_Onse\greeter>go run main.go --registry=consul

结果：

D:\code\go\Mi_Onse\greeter>go run main.go --registry=consul
go: finding module for package github.com/micro/go-plugins/registry/consul/v2
go: downloading github.com/micro/go-plugins/registry/consul/v2 v2.9.1
go: found github.com/micro/go-plugins/registry/consul/v2 in github.com/micro/go-plugins/registry/consul/v2 v2.9.1
go: downloading github.com/hashicorp/consul/api v1.3.0
2021-01-20 16:16:52  [email protected]/service.go:200 level=info Starting [service] go.micro.service.greeter
2021-01-20 16:16:52  file=grpc/grpc.go:864 level=info Server [grpc] Listening on [::]:58418
2021-01-20 16:16:52  file=grpc/grpc.go:881 level=info Broker [http] Connected to 127.0.0.1:58419
2021-01-20 16:16:52  file=grpc/grpc.go:697 level=info Registry [consul] Registering node: go.micro.service.greeter-73cca071-ce25-46d8-9c86-5becb4928262
2021-01-20 16:16:52  file=grpc/grpc.go:730 level=info Subscribing to topic: go.micro.service.greeter

命令：

D:\code\go\Mi_Onse\greeter>go run main.go --registry=consul

查看注册中心的服务：

image.png

命令 2：

D:\code\go\Mi_Onse\greeter>go run main.go --registry=consul --server_address=localhost:8500

结果：

2021-01-20 16:21:26  [email protected]/service.go:200 level=info Starting [service] go.micro.service.greeter
2021-01-20 16:21:26  file=greeter/main.go:40 level=fatal listen tcp 127.0.0.1:8500: bind: Only one usage of each socket address (protocol/network address/port) is normally permitted.
exit status 1

D:\code\go\Mi_Onse\greeter>

修改端口号：

D:\code\go\Mi_Onse\greeter>go run main.go --registry=consul --server_address=localhost:8898
2021-01-20 16:22:21  [email protected]/service.go:200 level=info Starting [service] go.micro.service.greeter
2021-01-20 16:22:21  file=grpc/grpc.go:864 level=info Server [grpc] Listening on 127.0.0.1:8898
2021-01-20 16:22:21  file=grpc/grpc.go:881 level=info Broker [http] Connected to 127.0.0.1:58705
2021-01-20 16:22:21  file=grpc/grpc.go:697 level=info Registry [consul] Registering node: go.micro.service.greeter-2b2c0be9-4bb5-4417-8231-2752f9f5000d
2021-01-20 16:22:21  file=grpc/grpc.go:730 level=info Subscribing to topic: go.micro.service.greeter

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命令行启动后，我们的使用Mirco 查看服务启动的列表信息（命令行了找不到consul ）：

D:\code\go\Mi_Onse>micro --registry mdns --registry_address loaclhost:8500 list services

D:\code\go\Mi_Onse>micro --registry consul --registry_address loaclhost:8500 list services
Registry consul not found

D:\code\go\Mi_Onse>micro --registry mdns --registry_address loaclhost:8500 list services

D:\code\go\Mi_Onse>micro --registry consul --registry_address loaclhost:8500 list services
Registry consul not found

D:\code\go\Mi_Onse>micro --registry etcd --registry_address loaclhost:8500 list services
{"level":"warn","ts":"2021-01-21T12:39:50.651+0800","caller":"clientv3/retry_interceptor.go:61","msg":"retrying of unary invoker failed","target":"endpoint://client-68f0be63-13f6-408b-a7a6-92ce0d8d4bca/loaclhost:8500","attempt":0,"e
rror":"rpc error: code = DeadlineExceeded desc = context deadline exceeded"}
context deadline exceeded

从上面的情况看，应该是无法从注册找到支持consul为中心的查询了！！！
对应的命令里面也没也这个支持写法了！！！

image.png

1 ）服务启动的时候，再的服务代码里注册

修改之后的代码：

package main

import (

    "github.com/micro/go-micro/v2"
    log "github.com/micro/go-micro/v2/logger"
    "github.com/micro/go-micro/v2/registry"
    "github.com/micro/go-plugins/registry/consul/v2"
    "greeter/handler"
    "greeter/subscriber"
    _ "github.com/micro/go-plugins/registry/consul/v2"
    greeter "greeter/proto/greeter"
)

func main() {

    reg := consul.NewRegistry(func(op *registry.Options) {
        op.Addrs = []string{
            "127.0.0.1:8500",
        }
    })

    // New Service
    service := micro.NewService(
        micro.Name("go.micro.service.greeter"),
        micro.Version("latest"),
        micro.Registry(reg),
    )

    // Initialise service
    service.Init()

    // Register Handler
    _ = greeter.RegisterGreeterHandler(service.Server(), new(handler.Greeter))

    // Register Struct as Subscriber
    _ =micro.RegisterSubscriber("go.micro.service.greeter", service.Server(), new(subscriber.Greeter))

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

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启动服务

D:\code\go\Mi_Onse\greeter>go run main.go
2021-01-20 16:28:56  [email protected]/service.go:200 level=info Starting [service] go.micro.service.greeter
2021-01-20 16:28:56  file=grpc/grpc.go:864 level=info Server [grpc] Listening on [::]:59145
2021-01-20 16:28:56  file=grpc/grpc.go:881 level=info Broker [http] Connected to 127.0.0.1:59146
2021-01-20 16:28:56  file=grpc/grpc.go:697 level=info Registry [consul] Registering node: go.micro.service.greeter-0f739d24-3034-4968-90ee-01fd3a487d4c
2021-01-20 16:28:56  file=grpc/grpc.go:730 level=info Subscribing to topic: go.micro.service.greeter

查看服务：

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