add mse-go-demo

mse-go-demo/a-server/.gitignore

@@ -0,0 +1,7 @@
+grpc-server
+main
+__debug_bin
+a-server
+
+.vscode/
+

mse-go-demo/a-server/Dockerfile

@@ -0,0 +1,29 @@
+FROM golang:1.19-alpine3.16 as build
+
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apk/repositories
+
+RUN apk --update add gcc libc-dev
+
+ADD . /workspace
+
+WORKDIR /workspace
+
+RUN --mount=type=cache,target=/go \
+  env GOPROXY=https://goproxy.cn,direct \
+  go build -buildmode=pie -ldflags "-linkmode external -extldflags -static -w" -o /workspace
+
+# The RUN line below is an alternative that also results in a static binary
+# that can be run FROM scratch but results in a slightly-larger executable
+# without ASLR.
+#
+# RUN CGO_ENABLED=0 go build -a -o arms-pilot
+
+FROM alpine:3.16
+
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apk/repositories
+
+COPY --from=build /workspace/a-server /a-server
+
+EXPOSE 50051
+
+CMD ["/a-server"]

mse-go-demo/a-server/Makefile

@@ -0,0 +1,15 @@
+REGISTRY ?=
+IMAGE_NAME ?= a-server
+IMAGE_TAG ?= 1.0.0
+IMG ?= ${REGISTRY}${IMAGE_NAME}:${IMAGE_TAG}
+
+docker-build:
+	docker build -t ${IMG} . --platform=linux/amd64
+
+docker-push: docker-build
+	docker push $(IMG)
+
+all:
+	protoc --go_out=. --go_opt=paths=source_relative \
+    --go-grpc_out=. --go-grpc_opt=paths=source_relative \
+    proto/**/*.proto

mse-go-demo/a-server/go.mod

@@ -0,0 +1,16 @@
+module github.com/aliyun/alibabacloud-microservice-demo/mse-go-demo/a-server
+
+go 1.19
+
+require (
+	google.golang.org/grpc v1.40.0
+)
+
+require (
+	github.com/golang/protobuf v1.5.2 // indirect
+	golang.org/x/net v0.0.0-20200822124328-c89045814202 // indirect
+	golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd // indirect
+	golang.org/x/text v0.3.0 // indirect
+	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 // indirect
+	google.golang.org/protobuf v1.27.1 // indirect
+)

mse-go-demo/a-server/go.sum

@@ -0,0 +1,118 @@
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+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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mse-go-demo/a-server/main.go

@@ -0,0 +1,95 @@
+// Package main implements a server for Greeter service.
+package main
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"regexp"
+	"time"
+
+	b_api_pb "github.com/aliyun/alibabacloud-microservice-demo/mse-go-demo/a-server/proto/b_api"
+	"google.golang.org/grpc"
+)
+
+const (
+	port = ":8080"
+
+	address = "go-b-service:50051"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	fmt.Printf("requesting: %v\n", r.URL)
+	ctx := context.Background()
+	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+
+	conn, err := grpc.DialContext(
+		ctx,
+		address,
+		grpc.WithInsecure(),
+		grpc.WithBlock(),
+	)
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+	bClient := b_api_pb.NewBServiceClient(conn)
+
+	bReply, err := bClient.BMethod(ctx, &b_api_pb.BRequest{})
+	if err != nil {
+		fmt.Printf("call b-service failed! %v\n", err)
+		log.Printf("call b-service failed! %v", err)
+		w.WriteHeader(500)
+		fmt.Fprint(w, err.Error())
+		return
+	}
+	content := generateMessage("A") + "->" + bReply.GetMessage()
+	fmt.Fprintln(w, content)
+}
+
+func main() {
+	fmt.Println("starting")
+	http.HandleFunc("/", handler)
+
+	fmt.Println("listening")
+	log.Fatal(http.ListenAndServe(port, nil))
+}
+
+func generateMessage(message string) string {
+	tag := parseTag()
+	if tag != "" {
+		message += "-" + tag
+	}
+	hostname, err := os.Hostname()
+	if err == nil {
+		message += "[" + hostname + "]"
+	}
+	return message
+}
+
+func parseTag() string {
+	var re = regexp.MustCompile(`(?m)alicloud\.service\.tag="(?P<tag>.*)"`)
+	bs, err := ioutil.ReadFile("/etc/podinfo/labels")
+	if err != nil {
+		return ""
+	}
+	content := string(bs)
+	result := re.FindStringSubmatch(content)
+
+	groupNames := re.SubexpNames()
+	index := 0
+	for i, name := range groupNames {
+		if name == "tag" {
+			index = i
+			break
+		}
+	}
+	if len(result) <= index {
+		return ""
+	}
+	return result[index]
+}