系統/工具/插件	版本	說明
ubuntu	Linux version 5.3.0-46-generic (buildd@lcy01-amd64-013) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #38~18.04.1-Ubuntu SMP Tue Mar 31 04:17:56 UTC 2020	cat /proc/version
consul	Consul v1.7.2 Protocol 2 spoken by default, understands 2 to 3 (agent will automatically use protocol >2 when speaking to compatible agents)	consul version
micro	micro version 1.18.0	micro --version
go-micro	v1.18.0	-

創建一個service-srv【service】和一個service-web【client】

consul

consul agent -dev

1.srv

1.創建目錄，剝離pb.go文件

mkdir -p $GOPATH/src/micro/rpc/pb

2.srv創建

cd $GOPTH/src/
micro new --type srv micro/rpc/srv

go get -u github.com/golang/protobuf/{proto,protoc-gen-go}
go get -u github.com/micro/protoc-gen-micro

3.進行編譯.proto

cd $GOPATH/src/micro/rpc/srv
tree $GOPATH/src/micro/rpc/srv
protoc --proto_path=.:$GOPATH/src --go_out=$GOPATH/src/micro/rpc/pb --micro_out=$GOPATH/src/micro/rpc/pb proto/srv/srv.proto

4.go mod init [*.pb.go目錄]

tree $GOPATH/src/micro/rpc
cd $GOPATH/src/micro/rpc/pb/proto/srv/ && go mod init micro/rpc/pb/proto/srv && cd $GOPATH/src/micro/rpc/srv

5.查看導包異常

cd $GOPATH/src/micro/rpc/srv
go mod why

go: finding module for package github.com/micro/go-micro/util/log
go: finding module for package github.com/micro/go-micro
go: found github.com/micro/go-micro in github.com/micro/go-micro v1.18.0
go: downloading github.com/onsi/gomega v1.4.3
go: downloading github.com/onsi/ginkgo v1.7.0
go: downloading github.com/nats-io/nats-server/v2 v2.1.0
go: downloading github.com/golang/mock v1.2.0
go: downloading github.com/prometheus/client_golang v1.1.0
go: downloading github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
go: downloading github.com/soheilhy/cmux v0.1.4
go: downloading gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127
go: downloading github.com/prometheus/common v0.6.0
go: downloading github.com/jonboulle/clockwork v0.1.0
go: downloading github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2
go: downloading github.com/alangpierce/go-forceexport v0.0.0-20160317203124-8f1d6941cd75
go: downloading github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c
go: downloading github.com/coreos/bbolt v1.3.3
go: downloading github.com/kr/pretty v0.1.0
go: downloading github.com/grpc-ecosystem/go-grpc-middleware v1.1.0
go: downloading github.com/kr/text v0.1.0
go: downloading github.com/hpcloud/tail v1.0.0
go: downloading github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5
go: downloading go.etcd.io/bbolt v1.3.3
go: downloading github.com/grpc-ecosystem/grpc-gateway v1.8.5
go: downloading github.com/coreos/go-semver v0.3.0
go: downloading github.com/dgrijalva/jwt-go v3.2.0+incompatible
go: downloading gopkg.in/fsnotify.v1 v1.4.7
go: downloading gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7
micro/rpc/srv imports
	micro/rpc/srv/proto/srv: package micro/rpc/srv/proto/srv is not in GOROOT (/usr/local/go/src/micro/rpc/srv/proto/srv)

6.修改go.mod 文件

修改$GOPATH/src/micro/rpc/srv下的go.mod 文件

追加【本地只能是相對路徑(=>後面的部分必須是相對路徑),換行符不要動】

tee -a $GOPATH/src/micro/rpc/srv/go.mod <<-'EOF'

require "micro/rpc/srv/proto/srv" v0.0.0
replace "micro/rpc/srv/proto/srv" => "../pb/proto/srv"
EOF

再次執行包異常檢測

go mod why

7.添加consul支持

修改$GOPATH/src/micro/rpc/srv/main.go文件

原main.go文件：

package main

import (
	"micro/rpc/srv/handler"
	"micro/rpc/srv/subscriber"

	"github.com/micro/go-micro"
	"github.com/micro/go-micro/util/log"

	srv "micro/rpc/srv/proto/srv"
)

func main() {
	// New Service
	service := micro.NewService(
		micro.Name("go.micro.srv.srv"),
		micro.Version("latest"),
	)

	// Initialise service
	service.Init()

	// Register Handler
	srv.RegisterSrvHandler(service.Server(), new(handler.Srv))

	// Register Struct as Subscriber
	micro.RegisterSubscriber("go.micro.srv.srv", service.Server(), new(subscriber.Srv))

	// Register Function as Subscriber
	micro.RegisterSubscriber("go.micro.srv.srv", service.Server(), subscriber.Handler)

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

修改後main.go文件：

package main

import (
	"micro/rpc/srv/handler"
	"micro/rpc/srv/subscriber"

	"github.com/micro/go-micro"
	"github.com/micro/go-micro/util/log"

	// 調用的protobuf生成的包
	srv "micro/rpc/srv/proto/srv"
	// 添加註冊插件
	"github.com/micro/go-micro/registry"
	// 添加註冊插件的consul支持
	"github.com/micro/go-plugins/registry/consul"
)

func main() {
	// 新建consul註冊器
	consulReg := consul.NewRegistry(
		// 註冊的地址信息
		registry.Addrs("127.0.0.1:8500"),
	)
	// New Service
	// 新建服務
	service := micro.NewService(
		// 服務名稱
		micro.Name("go.micro.srv.srv"),
		// 服務版本號
		micro.Version("latest"),
		// 服務添加consul支持
		micro.Registry(consulReg),
	)

	// Initialise service
	// 服務初始化
	service.Init()

	// Register Handler
	// 註冊句柄
	srv.RegisterSrvHandler(service.Server(), new(handler.Srv))

	// Register Struct as Subscriber
	// 註冊訂閱服務的結構體
	micro.RegisterSubscriber("go.micro.srv.srv", service.Server(), new(subscriber.Srv))

	// Register Function as Subscriber
	// 註冊訂閱服務的方法
	micro.RegisterSubscriber("go.micro.srv.srv", service.Server(), subscriber.Handler)

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

8.啓動srv

cd $GOPATH/src/micro/rpc/srv
go run main.go

2.web

新開一個終端，創建client【web】服務

1.web創建

cd $GOPATH/src
micro new --type web micro/rpc/web

2.查看導包異常

cd $GOPATH/src/micro/rpc/web
go mod why

go: finding module for package github.com/micro/go-micro/util/log
go: finding module for package github.com/micro/go-micro/web
go: finding module for package github.com/micro/go-micro/client
go: found github.com/micro/go-micro/util/log in github.com/micro/go-micro v1.18.0
micro/rpc/web/handler imports
	path/to/service/proto/web: package path/to/service/proto/web is not in GOROOT (/usr/local/go/src/path/to/service/proto/web)

3.修改go.mod文件

修改$GOPATH/src/micro/rpc/web下的go.mod 文件

追加【本地只能是相對路徑(=>後面的部分必須是相對路徑),換行符不要動】

tee -a $GOPATH/src/micro/rpc/web/go.mod <<-'EOF'

require "path/to/service/proto/web" v0.0.0
replace "path/to/service/proto/web" => "../pb/proto/srv"
EOF

再次執行包異常檢測

go mod why

4.添加consul支持

修改$GOPATH/src/micro/rpc/web/main.go文件

原main.go文件：

package main

import (
	"net/http"

	"github.com/micro/go-micro/util/log"

	"micro/rpc/web/handler"

	"github.com/micro/go-micro/web"
)

func main() {
	// create new web service
	service := web.NewService(
		web.Name("go.micro.web.web"),
		web.Version("latest"),
	)

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

	// register html handler
	service.Handle("/", http.FileServer(http.Dir("html")))

	// register call handler
	service.HandleFunc("/web/call", handler.WebCall)

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

修改後main.go文件：

package main

import (
	"net/http"

	"github.com/micro/go-micro/util/log"

	"micro/rpc/web/handler"

	"github.com/micro/go-micro/web"
	// 添加註冊插件
	"github.com/micro/go-micro/registry"
	// 添加註冊插件的consul支持
	"github.com/micro/go-plugins/registry/consul"
)

func main() {
	// 新建consul註冊器
	consulReg := consul.NewRegistry(
		// 註冊的地址信息
		registry.Addrs("127.0.0.1:8500"),
	)

	// create new web service
	// 創建web服務
	service := web.NewService(
		// 服務名
		web.Name("go.micro.web.web"),
		// 服務版本
		web.Version("latest"),
		// 服務添加consul支持
		web.Registry(consulReg),
		// 指定web服務端口號
		web.Address(":8080"),
	)

	// initialise service
	// 服務初始化
	if err := service.Init(); err != nil {
		log.Fatal(err)
	}

	// register html handler
	// 註冊靜態資源處理句柄
	service.Handle("/", http.FileServer(http.Dir("html")))

	// register call handler
	// 註冊/web/call服務請求處理句柄
	service.HandleFunc("/web/call", handler.WebCall)

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

5.修改handler/handler.go

修改$GOPATH/src/micro/rpc/web/handler/handler.go

原handler/handler.go文件：

package handler

import (
	"context"
	"encoding/json"
	"net/http"
	"time"

	web "path/to/service/proto/web"

	"github.com/micro/go-micro/client"
)

func WebCall(w http.ResponseWriter, r *http.Request) {
	// decode the incoming request as json
	var request map[string]interface{}
	if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
		http.Error(w, err.Error(), 500)
		return
	}

	// call the backend service
	webClient := web.NewWebService("go.micro.srv.web", client.DefaultClient)
	rsp, err := webClient.Call(context.TODO(), &web.Request{
		Name: request["name"].(string),
	})
	if err != nil {
		http.Error(w, err.Error(), 500)
		return
	}

	// we want to augment the response
	response := map[string]interface{}{
		"msg": rsp.Msg,
		"ref": time.Now().UnixNano(),
	}

	// encode and write the response as json
	if err := json.NewEncoder(w).Encode(response); err != nil {
		http.Error(w, err.Error(), 500)
		return
	}
}

修改後的handler/handler.go文件：

package handler

import (
	"context"
	"encoding/json"
	"net/http"
	"time"

	web "path/to/service/proto/web"

	"github.com/micro/go-micro/client"
)

func WebCall(w http.ResponseWriter, r *http.Request) {
	// decode the incoming request as json
	var request map[string]interface{}
	if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
		http.Error(w, err.Error(), 500)
		return
	}
	// 基於後端服務go.micro.srv.srv創建web客戶端
	// NewSrvService/rpc/pb/proto/srv/srv.pb.micro.go的NewSrvService方法名一致
	// go.micro.srv.srv也要和micro/rpc/pb/proto/srv/srv.pb.micro.go的go.micro.srv.srv的一致
	webClient := web.NewSrvService("go.micro.srv.srv", client.DefaultClient)

	// call the backend service
	// 客戶端調用後端服務
	rsp, err := webClient.Call(context.TODO(), &web.Request{
		Name: request["name"].(string),
	})
	if err != nil {
		http.Error(w, err.Error(), 500)
		return
	}

	// we want to augment the response
	response := map[string]interface{}{
		"msg": rsp.Msg,
		"ref": time.Now().UnixNano(),
	}

	// encode and write the response as json
	if err := json.NewEncoder(w).Encode(response); err != nil {
		http.Error(w, err.Error(), 500)
		return
	}
}

6.啓動web服務

cd $GOPATH/src/micro/rpc/web
go run main.go

3.訪問

1.consul web訪問

瀏覽器打開：

http://127.0.0.1:8500

2.web service 訪問

http://127.0.0.1:8080

4.附go.mod文件

1.srv

$GOPATH/src/micro/rpc/srv/go.mod

module micro/rpc/srv

go 1.14

require github.com/micro/go-micro v1.18.0

require (
	github.com/micro/go-plugins v1.5.1 // indirect
	google.golang.org/protobuf v1.21.0 // indirect
	micro/rpc/srv/proto/srv v0.0.0
)

replace micro/rpc/srv/proto/srv => ../pb/proto/srv

2.web

$GOPATH/src/micro/rpc/web/go.mod

module micro/rpc/web

go 1.14

require github.com/micro/go-micro v1.18.0

require (
	github.com/micro/go-plugins v1.5.1 // indirect
	google.golang.org/protobuf v1.21.0 // indirect
	path/to/service/proto/web v0.0.0
)

replace path/to/service/proto/web => ../pb/proto/srv

Microservice(七)[微服務-micro-consul-protobuf-RPC-ubuntu]

Microservice-微服務-micro-consul-protobuf-RPC-ubuntu

consul

1.srv

1.創建目錄，剝離pb.go文件

2.srv創建

3.進行編譯.proto

4.go mod init [*.pb.go目錄]

5.查看導包異常

6.修改go.mod 文件

7.添加consul支持

8.啓動srv

2.web

1.web創建

2.查看導包異常

3.修改go.mod文件

4.添加consul支持

5.修改handler/handler.go

6.啓動web服務

3.訪問

1.consul web訪問

2.web service 訪問

4.附go.mod文件

1.srv

2.web