discovery

Hi this may sound as a stupid question.But I was unable to find any answers for this, thus posting here. I am building an indoor application which continuously scans the bluetooth dongles located at different locations in a place like a mall or library.As I move in the mall with android phone in my hand I should be able to get the nearest dongle which I can connect to(Stupid Idea but I want to do something else with this).For this I should be able to continuously scan for the bluetooth devices. Please can someone tell me how do I make android scan the available Bluetooth devices periodically.

I am trying to find some public UDDI registries to interact with, for learning purposes. But it seems there are none available. I popped the following question on SO to see if someone knows about any public registry still hosted, but got no answers. The IBM, Microsoft and SAP public registries were a test of the UDDI technology. I quote from here : The primary goal of the UBR was to prove the interoperability and robustness of the UDDI specifications through a public implementation. This goal was met and far exceeded. They now continue to support the UDDI specifications in their products (so,

I want to be able to discover Android devices on my network and possibly retrieve some device information about them. This is very easy with Apple devices since they run Bonjour services. However, I can't seem to find any similar service running on Android. This must work without modifying the Android device, installing some service, or opening some port. It's meant to work with vanilla Android devices in the way that Bonjour helps you find vanilla Apple devices. Even being able to just verify that the device is running Android would be sufficient. Chosen Answer : Although it's not the top

简介： etcd ：key-value键值存储数据库，用来存储kubernetes的信息的。 部署规划 这里我用3台服务器搭建一个简单的集群： 192.168.0.157 # master节点 192.168.0.158 # node节点 192.168.0.159 # node节点 1 、三个节点安装 etcd yum install etcd -y 2、etcd集群配置 在master节点上编辑etcd配置文件 [root@node1 ~]# vi /etc/etcd/etcd.conf # [member] ETCD_NAME=etcd1 ETCD_DATA_DIR="/var/lib/etcd/default.etcd" #ETCD_WAL_DIR="" #ETCD_SNAPSHOT_COUNT="10000" #ETCD_HEARTBEAT_INTERVAL="100" #ETCD_ELECTION_TIMEOUT="1000" ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380" ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379" ETCD_MAX_SNAPSHOTS="5" #ETCD_MAX_WALS="5" #ETCD_CORS="" # #[cluster] ETCD_INITIAL

一、简介 “A highly-available key value store for shared configuration and service discovery.” 　　Etcd是coreos开发的分布式服务系统，内部采用raft协议作为一致性算法。作为一个高可用的配置共享、服务发现的键值存储系统，Etcd有以下的特点： 　　　　1）简单：安装配置简单，而且提供了 HTTP API 进行交互，使用也很简单 　　　　2）安全：支持 SSL 证书验证 　　　　3）快速：根据官方提供的数据，单实例支持每秒2k+读操作、1k写操作 　　　　4）可靠：采用raft算法，实现分布式系统数据的可用性和一致性 　　Etcd构建自身高可用集群主要有三种形式: 　　　　1）静态发现: 预先已知 Etcd 集群中有哪些节点，在启动时直接指定好Etcd的各个node节点地址 　　　　2）Etcd动态发现: 通过已有的Etcd集群作为数据交互点，然后在扩展新的集群时实现通过已有集群进行服务发现的机制 　　　　3）DNS动态发现: 通过DNS查询方式获取其他节点地址信息 　　本文主要介绍第一种方式，后续会陆续介绍剩下的两种方式。(直接docker安装请移步：quay.io/coreos/etcd 基于Docker镜像的集群搭建) 二、环境介绍 三台虚拟机，系统环境均为Centos7

原文地址： Configuration flags etcd通过配置文件，多命令行参数和环境变量进行配置， 可重用的配置文件是YAML文件，其名称和值由一个或多个下面描述的命令行标志组成。为了使用此文件，请将文件路径指定为 --config-file 标志或 ETCD_CONFIG_FILE 环境变量的值。如果需要的话 配置文件示例 可以作为入口点创建新的配置文件。 在命令行上设置的选项优先于环境中的选项。 如果提供了配置文件，则其他命令行标志和环境变量将被忽略。例如， etcd --config-file etcd.conf.yml.sample --data-dir /tmp 将会忽略 --data-dir 参数。 参数 --my-flag 的环境变量的格式为 ETCD_MY_FLAG .它适用于所有参数。 客户端请求 官方的etcd端口 为2379,2380是节点通信端口。可以将etcd端口设置为接受TLS流量，非TLS流量，或同时接受TLS和非TLS流量。 要在Linux启动时使用自定义设置自动启动etcd，强烈建议使用 systemd 单元。 成员标记 --name 人类可读的该成员的名字 默认值："default" 环境变量：ETCD_DATA_DIR 该值被该节点吃的 --initial-cluster 参数引用(例如 default=http://localhost