Example #1
0
func main() {
	initEnv()
	log.Printf("[GUARDKEEPER]Now begin to start guardkeeper...")

	if *MONITOR_INTERVAL <= 0 {
		log.Println("[GUARDKEEPER]the param: monitorInterval is less than 0!")
		os.Exit(2)
	}
	for {
		if !common.FileExists(signPath, signFile) {
			log.Println("[GUARDKEEPER]sign file not found yet, path: " + signPath + ", filename: " + signFile + " please wait...")
			time.Sleep(time.Duration(*MONITOR_INTERVAL) * time.Second)
			continue
		}
		log.Println("[GUARDKEEPER]found the sign file!")
		break
	}

	// hostIp := common.GetHostIp()
	hostName := common.GetHostName()
	realIp := common.GetShell("ifconfig eth0 | grep \"inet addr\" | awk '{print $2}' | awk -F: '{print $2}'")
	// 选用--net=bridge方式的话,则进行ip替换。
	// commandCore := fmt.Sprintf("s/%s\t%s/%s\t%s/g", hostIp, hostName, realIp, hostName)
	// common.GetShell("sed \"" + commandCore + "\" /etc/hosts > out.tmp && cat out.tmp > /etc/hosts && rm -f out.tmp")

	// 选用--net=none方式的话,那么/etc/hosts里面不会有ip\tport信息。此时直接往里面插就行。
	common.GetShell(fmt.Sprintf("echo \"%s\t%s\" >> /etc/hosts", realIp, hostName))

	log.Println("[GUARDKEEPER]now begin to execute supervisord!")
	log.Fatalln("[GUARDKEEPER]Error...", common.GetShell("/usr/bin/supervisord"))
}
Example #2
0
func initEnv() {
	// 让命令行的命令生效
	flag.Parse()
	// 初始化一些初始变量
	serviceIp = common.GetHostIp()
	serviceName = os.Getenv("SERVICE_NAME")
	common.Assert(serviceName)
	servicePort = os.Getenv("SERVICE_PORT")
	common.Assert(servicePort)
	// 直接以容器ID + ServiceName来命名,确保唯一。如果后续发现容器ID不唯一,那么就再加上宿主机IP
	// serviceId = strconv.FormatInt(time.Now().Unix(), 10) + "_" + serviceName
	serviceId = common.GetHostName() + "_" + serviceName
	signFile = "/home/work/data/$(hostname)/kickoff_sign_file"
	isNormal = false

	// 给一个channel,如果没有严重错误就永久等待
	fatalExit = make(chan int)
}
Example #3
0
func main() {

	initEnv()

	// 持续监听指定端口号,采用netstat -nlp | grep ":$PORT"来实现,隔5s来一次
	log.Printf("[REGISTRATOR]Now begin to listen service: %s with service port: %s.", serviceName, servicePort)

	if *monitorInterval <= 0 {
		log.Println("[REGISTRATOR]the param: monitorInterval is less than 0!")
		os.Exit(2)
	}
	// ticker := time.NewTicker(time.Duration(*monitorInterval) * time.Millisecond)
	log.Println("[REGISTRATOR]Now begin to listen the port...")
	for {
		if !common.PortExists(servicePort) { // 说明启动还未成功
			log.Println("[REGISTRATOR]Not found port for registration, please wait...")
			time.Sleep(time.Duration(*monitorInterval) * time.Millisecond)
			continue
		}
		log.Println("[REGISTRATOR]found the port for registration!")
		isNormal = true
		break
	}

	// 启动成功的话,就先初始化consul客户端
	log.Println("[REGISTRATOR]Now begin to process registration!")
	consulClient, _ = consulApi.NewClient(defaultConfig())

	// 然后调用consulapi进行注册
	register()
	updateState(common.GetHostName(), mongo.CONTAINER_STATE_ALL_UP)
	log.Println("[REGISTRATOR]Now finished registration!")

	// 启动自动监控功能,当端口不在的时候,能够取消注册
	ticker := time.NewTicker(time.Duration(*monitorInterval) * time.Second)
	go func() {
		for {
			select {
			case <-ticker.C:
				log.Println("[REGISTRATOR]Now in a loop monitor ticket time!")
				if common.PortExists(servicePort) {
					if !isNormal {
						log.Println("[REGISTRATOR]Now begin to register!")
						isNormal = true
						register()
						// 注册信号量
						updateState(common.GetHostName(), mongo.CONTAINER_STATE_ALL_UP)
					}
				} else {
					if isNormal {
						log.Println("[REGISTRATOR]Now begin to deregister!")
						isNormal = false
						deregister()
						// 取消信号量。如果是容器北山,就已经至少被mask掉了。
						updateState(common.GetHostName(), mongo.CONTAINER_STATE_ERROR)
					}
				}
			}
		}
	}()

	log.Fatalln("[REGISTRATOR]Error...", <-fatalExit)
}
Example #4
0
func initEnv() {
	flag.Parse()
	signPath = "/home/work/data/" + common.GetHostName() + "/"
	signFile = "kickoff_sign_file"
}