ProjectOctopus/agent-go/register/AgentIntitilization.go

package register

import (
	"agent-go/config"
	"agent-go/g"
	"agent-go/rabbitmq"
	"encoding/json"
	"fmt"
	"gopkg.in/yaml.v3"
	"io/ioutil"
)

var omType = g.InitOmType
var log = g.G.LOG

func INIT() *config.AgentServerInfo {

	// 获取系统的环境变量
	agentServerInfo := parseAgentServerInfo()

	nacosConfig := g.G.NacosConfig

	initToServerProp := &rabbitmq.ConnectProperty{
		ExchangeName: nacosConfig.GetString("octopus.message.init_exchange"),
		QueueName:    nacosConfig.GetString("octopus.message.init_to_server"),
		ExchangeType: g.QueueDirect,
		TopicKey:     nacosConfig.GetString("octopus.message.init_to_server_key"),
	}

	initFromServerProp := &rabbitmq.ConnectProperty{
		ExchangeName: nacosConfig.GetString("octopus.message.init_exchange"),
		QueueName:    nacosConfig.GetString("octopus.message.init_from_server"),
		ExchangeType: g.QueueDirect,
		TopicKey:     nacosConfig.GetString("octopus.message.init_from_server_key"),
	}

	// 建立RabbitMQ的连接
	// defer 关闭初始化连接
	initToServer, err := rabbitmq.NewRabbitMQConn(
		initToServerProp,
	)
	if err != nil {
		log.Error("init to server queue established error!")
		panic(err)
	}
	//defer rabbitmq.CloseChannel(initToServer)
	//defer rabbitmq.CloseChannel(initFromServer)

	// 组装OctopusMessage
	var octopusMsg *config.OctopusMessage
	octopusMsg = octopusMsg.BuildOctopusMsg(
		omType,
		agentServerInfo,
	)

	msgBytes, err := json.Marshal(octopusMsg)
	if err != nil {
		log.Error(fmt.Sprintf("octopus message convert to json is wrong! msg is => %v", octopusMsg))
	}

	log.Debug(fmt.Sprintf("Prepare to send init message to server! ==> %s", string(msgBytes)))

	// 发送OM至MQ中
	rabbitmq.Send(
		initToServer,
		initToServerProp,
		msgBytes,
	)

	// 监听初始化连接中的信息
	initFromServer, err := rabbitmq.NewRabbitMQConn(
		initFromServerProp,
	)
	if err != nil {
		log.Error("init from server queue established error!")
		panic(err)
	}

	// 建立运行时RabbitMQ连接
	handleInitMsgFromServer(initFromServer, initFromServerProp, initToServer, initToServerProp, agentServerInfo)

	return agentServerInfo
}

// handleInitMsgFromServer 处理从Server接收的注册信息
func handleInitMsgFromServer(initFromServer *rabbitmq.RabbitMQConn, initFromServerProp *rabbitmq.ConnectProperty, initToServer *rabbitmq.RabbitMQConn, initToServerProp *rabbitmq.ConnectProperty, agentServerInfo *config.AgentServerInfo) {

	deliveries := rabbitmq.Read(initFromServer, initFromServerProp, false)

	forever := make(chan bool)

	go func() {

		// 同步很多抢占注册的情况
		for delivery := range deliveries {

			log.Debug(fmt.Sprintf("message received from server is %s", string(delivery.Body)))

			var om *config.OctopusMessage
			err := json.Unmarshal(delivery.Body, &om)
			if err != nil {
				log.Error(fmt.Sprintf("parse init message from server wroong, message is =>  %s ",
					string(delivery.Body)))
			}

			var serverInfo config.AgentServerInfo

			s, _ := om.Content.(string)
			cc := json.Unmarshal([]byte(s), &serverInfo)
			if cc != nil {
				log.Error(fmt.Sprintf("parse init message from server wroong, message is =>  %v ", cc))
			}

			serverName := serverInfo.ServerName

			// 处理OM信息
			if om != nil && om.Type == g.InitOmType && serverName == agentServerInfo.ServerName {
				// 是本机的注册回复信息

				// 建立运行时RabbitMQ连接
				// change to async
				go rabbitmq.HandleOMsg(om)

				// 手动确认信息
				delivery.Ack(false)

				// 手动关闭 注册队列的连接
				shutdownRegisterQueueConnection(initFromServer, initFromServerProp, initToServer, initToServerProp)

				return
			}

			// 不是自身的 注册回复信息 -- 拒绝
			log.Warn(fmt.Sprintf("OctopusMessage INIT from server not this agent !  => %v, ==>%s", om, delivery.Body))
			delivery.Nack(false, true)
		}

	}()

	// wait forever
	<-forever

}

// shutdownRegisterQueueConnection 关闭初始化连接的两个队列
func shutdownRegisterQueueConnection(initFromServer *rabbitmq.RabbitMQConn, initFromServerProp *rabbitmq.ConnectProperty, initToServer *rabbitmq.RabbitMQConn, initToServerProp *rabbitmq.ConnectProperty) {

}

func parseAgentServerInfo() *config.AgentServerInfo {

	// 约定文件地址为 /etc/environment.d/octopus-agent.conf
	// 目前使用
	var agentServerInfo *config.AgentServerInfo
	//yamlFile, err := ioutil.ReadFile("C:\\Users\\wdd\\IdeaProjects\\ProjectOctopus\\agent-go\\server-env.yaml")
	yamlFile, err := ioutil.ReadFile("server-env.yaml")

	if err != nil {
		panic(fmt.Errorf("failed to read YAML file: %v", err))
	}

	err = yaml.Unmarshal(yamlFile, &agentServerInfo)
	if err != nil {
		panic(fmt.Errorf("failed to unmarshal YAML: %v", err))
	}

	jsonFormat, err := json.Marshal(agentServerInfo)
	if err != nil {
		log.Error(fmt.Sprintf("agent server info convert error ! agentserverinfo is %v", agentServerInfo))
		panic(err)
	}
	log.Info(fmt.Sprintf("agent server info is %v", string(jsonFormat)))

	return agentServerInfo
}