Name	Name	Last commit message	Last commit date
parent directory ..
TestApp/HelloGo	TestApp/HelloGo
simple	simple
README.md	README.md

部署服务

这里举了两个例子：

部署示例simpleserver
基于Go语言的 HelloWorld 程序 TestApp.HelloGo

部署示例simpleserver

执行： cd examples/simple && kubectl apply -f simpleserver.yaml

示例说明：
- 镜像由examples/simple/Dockerfile文件制作，基础镜像由cmd/tarscli/Dockerfile制作
- start.sh中的tarscli genconf用于生成tars服务启动配置
- _server_meta.yaml文件用于配置服务的元数据，字段信息可以参考app/genconf/config.go中的ServerConf结构体。endpoint默认为tcp -h ${local_ip} -p ${random_port}，支持自动填入IP和随机端口。
验证部署
- 登录db_tars，然后执行select * from t_server_conf\G可以看到simpleserver的节点信息已自动注册。
- 访问TarsWeb查看服务已部署成功。

基于Go语言的 HelloWorld 程序 TestApp.HelloGo

参照 TarsGo开发环境部署部署好开发环境

参照 TarsGo快速入门的说明创建服务

创建服务

运行create_tars_server.sh脚本，自动创建服务必须的文件

sh $GOPATH/src/github.com/TarsCloud/TarsGo/tars/tools/create_tars_server.sh [App] [Server] [Servant]
  例如： 
sh $GOPATH/src/github.com/TarsCloud/TarsGo/tars/tools/create_tars_server.sh TestApp HelloGo SayHello

命令执行后将生成代码至GOPATH中，并以APP/Server命名目录，生成代码中也有提示具体路径。

[root@1-1-1-1 src]# sh $GOPATH/src/github.com/TarsCloud/TarsGo/tars/tools/create_tars_server.sh TestApp HelloGo SayHello
[create server: TestApp.HelloGo ...]
[mkdir: /data/gopath/src/TestApp/HelloGo/]
>>>Now doing:./config.conf >>>>
>>>Now doing:./main.go >>>>
>>>Now doing:./Servant_imp.go >>>>
>>>Now doing:./makefile >>>>
>>>Now doing:./Servant.tars >>>>
>>>Now doing:./start.sh >>>>
>>>Now doing:client/client.go >>>>
>>>Now doing:vendor/vendor.json >>>>
>>>Now doing:debugtool/dumpstack.go >>>>
>>> Great！Done! You can jump in /data/gopath/src/TestApp/HelloGo
>>> Tips: After editing the Tars file, execute the following cmd to automatically generate golang files.
>>>       /data/gopath/bin/tars2go *.tars

定义接口文件

我们在 SayHello 接口下定义两个函数，一个Add和一个Sub，客户端请求参数是两个整型a和b，服务端计算a和b的运算结果赋值给c，并返回c的值。

module TestApp
{
	interface SayHello
	{
	    int Add(int a,int b,out int c); // Some example function
	    int Sub(int a,int b,out int c); // Some example function
	};
};

注意：参数中 out 修饰关键字标识输出参数。

服务端开发

首先把tars协议文件转化为Golang语言形式

cd $GOPATH/src/TestApp/HelloGo/
$GOPATH/bin/tars2go SayHello.tars

现在开始实现服务端的逻辑：

vim $GOPATH/src/TestApp/HelloGo/sayhello_imp.go

在 Add 函数里计算 a + b，并赋值给c

在 Sub 函数里计算 a - b，并赋值给c

package main

import (
"context"
)

// SayHelloImp servant implementation
type SayHelloImp struct {
}

// Init servant init
func (imp *SayHelloImp) Init() (error) {
//initialize servant here:
//...
return nil
}

// Destroy servant destory
func (imp *SayHelloImp) Destroy() {
//destroy servant here:
//...
}

func (imp *SayHelloImp) Add(ctx context.Context, a int32, b int32, c *int32) (int32, error) {
//Doing something in your function
*c = a + b
return 0, nil
}
func (imp *SayHelloImp) Sub(ctx context.Context, a int32, b int32, c *int32) (int32, error) {
//Doing something in your function
*c = a - b
return 0, nil
}

注意：这里函数名要大写，Go语言方法导出规定。

编辑main函数，初始代码已经由TARS框架实现了。

vim $GOPATH/src/TestApp/HelloGo/main.go

package main

import (
  "fmt"
  "os"

  "github.com/TarsCloud/TarsGo/tars"

  "TestApp/HelloGo/TestApp" //Edit like this
)

func main() {
  // Get server config
  cfg := tars.GetServerConfig()

  // New servant imp
  imp := new(SayHelloImp)
  err := imp.Init()
  if err != nil {
    fmt.Printf("SayHelloImp init fail, err:(%s)\n", err)
    os.Exit(-1)
  }
  // New servant
  app := new(TestApp.SayHello)
  // Register Servant
  app.AddServantWithContext(imp, cfg.App+"."+cfg.Server+".SayHelloObj")

  // Run application
  tars.Run()
}

注意：将 import 里的 TestApp 改为 TestApp/HelloGo/TestApp

将 HelloGo的Demo 下的

Dockerfile、makefile、_server_meta.yaml、simpleserver.yaml、start.sh

五个文件拷贝到$GOPATH/src/TestApp/HelloGo/下
修改_server_meta.yaml文件，根据实际情况填写 application、server、object 字段的值。

vim $GOPATH/src/TestApp/HelloGo/_server_meta.yaml
```
version: v1
application: TestApp
server: HelloGo
adapters:
  - object: SayHelloObj
```
修改 start.sh，根据实际情况修改服务名及配置名

vim $GOPATH/src/TestApp/HelloGo/start.sh
```
#!/bin/bash

# start server
${TARS_PATH}/bin/HelloGo --config=${TARS_PATH}/conf/HelloGo.conf
```

修改 makefile，根据实际情况填写 APP、TARGET

vim $GOPATH/src/TestApp/HelloGo/makefile

APP    := TestApp
TARGET := HelloGo

GOBUILD      := go build
DOCKER_BUILD := docker build

REPO         ?= ccr.ccs.tencentyun.com/tarsbase
VERSION  ?= $(shell date "+%Y%m%d%H%M%S") #Edit if you need

LOWCASE_TARGET := $(shell echo $(TARGET) | tr '[:upper:]' '[:lower:]')
IMG_REPO       := $(REPO)/$(LOWCASE_TARGET)

build:
	GOOS=linux $(GOBUILD) -o $(TARGET)

img: build
	$(DOCKER_BUILD) --build-arg SERVER=$(TARGET) -t $(IMG_REPO):$(VERSION) .

tgz: build
	tar czf $(TARGET).tgz $(TARGET) _server_meta.yaml

patch: tgz
	curl --data-binary @$(TARGET).tgz "${TARS_EP}/patch?server=$(TARGET)&version=$(VERSION)"
	
stdout:
	@curl "${TARS_EP}/stdout?server=$(TARGET)"

listlog:
	@curl "${TARS_EP}/listlog?app=$(APP)&server=$(TARGET)"

tailog:
	@curl "${TARS_EP}/tailog?app=$(APP)&server=$(TARGET)&filename=$(LOG_NAME)"

clean:
	rm -rf $(TARGET)

制作镜像

cd $GOPATH/src/TestApp/HelloGo/ && make img

[root@1-1-1-1 HelloGo]# make img
GOOS=linux go build -o HelloGo
docker build --build-arg SERVER=HelloGo -t ccr.ccs.tencentyun.com/tarsbase/hellogo:20200725145313 .
Sending build context to Docker daemon  23.44MB
Step 1/5 : FROM ccr.ccs.tencentyun.com/tarsbase/tarscli:latest
 ---> ef39bfa9b5e6
Step 2/5 : ARG SERVER=please_build_by_make_img
 ---> Using cache
 ---> c3a89b1e1be5
Step 3/5 : ENV TARS_BUILD_SERVER ${SERVER}
 ---> Using cache
 ---> 5f8fc936380e
Step 4/5 : COPY $SERVER _server_meta.yaml start.sh $TARS_PATH/bin/
 ---> Using cache
 ---> 05f31e9e6e4a
Step 5/5 : CMD tarscli supervisor
 ---> Using cache
 ---> be8b4a482834
Successfully built be8b4a482834
Successfully tagged ccr.ccs.tencentyun.com/tarsbase/hellogo:20200725145313

记住制作好的镜像名，本例为： ccr.ccs.tencentyun.com/tarsbase/hellogo:20200725145313

修改 simpleserver.yaml 文件，并将TestApp.HelloGo部署至k8s集群

vim $GOPATH/src/TestApp/HelloGo/simpleserver.yaml 修改image的值为上一步制作好的镜像名

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hellogo
spec:
  selector:
    matchLabels:
      app: hellogo
  replicas: 1
  template:
    metadata:
      labels:
        app: hellogo
    spec:
      containers:
      - name: hellogo
        image: ccr.ccs.tencentyun.com/tarsbase/hellogo:20200725145313 #Edit here to the image you just build
        imagePullPolicy: IfNotPresent 
        lifecycle:
          preStop:
            exec:
              command: ["tarscli", "prestop"]
        readinessProbe:
          exec:
            command: ["tarscli", "hzcheck"]
          initialDelaySeconds: 2
          timeoutSeconds: 8
          periodSeconds: 6

执行 kubectl apply -f simpleserver.yaml

验证部署
- 登录db_tars，然后执行select * from t_server_conf\G可以看到HelloGo的节点信息已自动注册。
- 访问TarsWeb查看服务已部署成功。

客户端开发

client 目录下提供了一个客户端的demo

package main

import (
	"fmt"

	"github.com/TarsCloud/TarsGo/tars"

	"TestApp/HelloGo/TestApp"
)

func main() {
	comm := tars.NewCommunicator()
  //If your server "HelloGo" has been registered to tarsregistry
  obj := fmt.Sprintf("TestApp.HelloGo.SayHelloObj")
  //If your server "HelloGo" hasn't been registerd to tarsregistry
  //obj := fmt.Sprintf("TestApp.HelloNew.SayHelloObj@tcp -h 127.0.0.1 -p 10015 -t 60000")
  //"127.0.0.1" and "10015" should be change to your HelloGo's IP and Port.
	app := new(TestApp.SayHello)

	//If your server has been registered to tarsregistry
  comm.SetProperty("locator", "tars.tarsregistry.QueryObj@tcp -h 192.168.0.55 -p 17890")
  //"192.168.0.55" should be change to your tarsregistry's IP

	comm.StringToProxy(obj, app)
	var out, i int32
	i = 123
	ret, err := app.Add(i, i*2, &out)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(ret, out)
}

编译测试

[root@1-1-1-1 client]# go build client.go
[root@1-1-1-1 client]# ./client 
0 369

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部署服务

部署示例simpleserver

基于Go语言的 HelloWorld 程序 TestApp.HelloGo

创建服务

定义接口文件

服务端开发

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TestApp/HelloGo

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simple

README.md

README.md

README.md

部署服务

部署示例simpleserver

基于Go语言的 HelloWorld 程序 TestApp.HelloGo

创建服务

定义接口文件

服务端开发

客户端开发