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+# play-with-docker
+
+Play With Docker gives you the experience of having a free Alpine Linux Virtual Machine in the cloud
+where you can build and run Docker containers and even create clusters with Docker features like Swarm Mode.
+
+Under the hood DIND or Docker-in-Docker is used to give the effect of multiple VMs/PCs.
+
+A live version is available at: http://play-with-docker.com/
+
+## Requirements
+
+Docker 1.13+ is required. 
+
+The docker daemon needs to run in swarm mode because PWD uses overlay attachable networks. For that
+just run  `docker swarm init` in the destination daemon.
+
+It's also necessary to manually load the IPVS kernel module because as swarms are created in `dind`, 
+the daemon won't load it automatically. Run the following command for that purpose: `sudo modprobe xt_ipvs`
+
+
+## Development
+
+Start the Docker daemon on your machine and run `docker pull franela/dind`. 
+
+1) Install go 1.7.1 with `brew` on Mac or through a package manager.
+
+2) `go get -v -d -t ./...`
+
+3) Start PWD as a container with docker-compose up.
+
+5) Point to http://localhost and click "New Instance"
+
+Notes:
+
+* There is a hard-coded limit to 5 Docker playgrounds per session. After 4 hours sessions are deleted.
+* If you want to override the DIND version or image then set the environmental variable i.e.
+  `DIND_IMAGE=franela/docker<version>-rc:dind`. Take into account that you can't use standard `dind` images, only [franela](https://hub.docker.com/r/franela/) ones work.
+
+
+## FAQ
+
+### How can I connect to a published port from the outside world?
+
+~~We're planning to setup a reverse proxy that handles redirection automatically, in the meantime you can use [ngrok](https://ngrok.com) within PWD running `docker run --name supergrok -d jpetazzo/supergrok` then `docker logs --follow supergrok` , it will give you a ngrok URL, now you can go to that URL and add the IP+port that you want to connect to… e.g. if your PWD instance is 10.0.42.3, you can go to http://xxxxxx.ngrok.io/10.0.42.3:8000 (where the xxxxxx is given to you in the supergrok logs).~~
+
+If you need to access your services from outside, use the following URL pattern `http://pwd<underscore_ip>-<port>.<host#>.labs.play-with-docker.com` (i.e: http://pwd10_2_135_3-80.host3.labs.play-with-docker.com/).
+
+### Why is PWD running in ports 80 and 443?, Can I change that?.
+
+No, it needs to run on those ports for DNS resolve to work. Ideas or suggestions about how to improve this
+are welcome
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
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-# play-with-docker
+![dockercon-cool-hacks](http://bingohuang.nos-eastchina1.126.net/docker-labs2.jpg)
 
-Play With Docker gives you the experience of having a free Alpine Linux Virtual Machine in the cloud
-where you can build and run Docker containers and even create clusters with Docker features like Swarm Mode.
+DockerCon 2017 刚刚落下帷幕，引燃了Docker社区。除了主场，我还发现一个比较有意思的环节，叫做 [`Cool Hacks`](https://blog.docker.com/2017/04/dockercon-2017-mobys-cool-hack-sessions/)。
 
-Under the hood DIND or Docker-in-Docker is used to give the effect of multiple VMs/PCs.
+在每年的 `DockerCon Cool Hacks` 中，都会推出一些比较酷的特性和产品。今年就推出了这个开源项目: [`Play With Docker`](http://labs.play-with-docker.com/)，我把它叫做`Docker在线实验室`。
 
-A live version is available at: http://play-with-docker.com/
+![play-with-docker](http://bingohuang.nos-eastchina1.126.net/docker-labs%2Fplay-with-docker.jpg)
 
-## Requirements
+## 一、简介
 
-Docker 1.13+ is required. 
+`Play With Docker` 是一个运行在浏览器中的Docker Playground，无需安装任何环境，就可以在线体验 Docker。
 
-The docker daemon needs to run in swarm mode because PWD uses overlay attachable networks. For that
-just run  `docker swarm init` in the destination daemon.
+其实在DockerCon之前我就关注过此项目，今年3月，为了给网易举办的[Docker Meetup](http://www.huodongxing.com/event/9376622259800)，提供一套在线演练和操作环境，配合Docker Labs做实操演练，基于开源版本做了本地化和镜像优化，并部署在网易云基础服务中，非常实用，收效甚佳。
 
-It's also necessary to manually load the IPVS kernel module because as swarms are created in `dind`, 
-the daemon won't load it automatically. Run the following command for that purpose: `sudo modprobe xt_ipvs`
+在线体验: http://labs.bingohuang.com
+
+## 二、用处
+一个Docker在线环境有什么用处呢？
+
+1. 有时你看到一个不错的Docker应用，或是Docker教程，想马上动手一试，万一没有现成的环境
+2. 国内的网络，安装Docker和下载Docker镜像都不尽人意，你不想浪费时间
+3. 本地虽有Docker环境，但无奈内存或磁盘等资源不够，你不想浪费资源
+
+以上几种场景，[Docker在线实验室](http://labs.bingohuang.com/)都可以为你提供现成的便利。
+
+## 三、介绍
+
+访问[Docker实验室](http://labs.bingohuang.com/)，你会发现共两个页面，一个欢迎页，一个主界面。
+![docker-labs-welcome](http://bingohuang.nos-eastchina1.126.net/docker-labs%2Fdocker-labs-welcome.png)
+![docker-labs-index](http://bingohuang.nos-eastchina1.126.net/docker-labs%2Fdocker-labs-index.png)
+相对简洁明了，无需赘述功能，欢迎多多试用。
+
+这里介绍几个有意思的特性:
+
+1. 每次开启实验室，相当于一个独立的Session，如果想访问相同的实验室，请记住你的URL，特别是后面一串随机字符串，否则你只能找我或者后台管理员了
+2. 有实验室就要有工作台，工作台本身就是一个独立的Docker容器，基于Alpine Linux 操作系统，其中再预装Docker环境，背后用到的正是Docker in Docker技术(又叫`DIND`)
+3. 每一个工作台有一个交互终端(Terminal)，用于远程操作和实验，简洁实用
+4. 终端可以切换全屏(快捷键`Alt+Enter`)，可以调整字体大小(见设置)，方便演示
+5. 每个工作台会提供IP信息，以及内存和CPU的使用率，用的是`docker stats`接口
+6. 支持 Web 应用在线部署和访问(见下一节中的`Nginx`实例)
+7. 工作台之间的IP是联通的，支持集群管理，比如用Swarm管理Docker集群
+
+其它特性还有待你来发现。
+
+当然，云主机毕竟资源有限，对实验室和工作台都会有一些限制:
+1. 为防止资源占据太久，每个实验室会有时间限制，默认3个小时
+2. 为防止资源占据太多，工作台有个数上限，默认是5个
+3. 为了防止自动不断的创建实验室，会有Google人机验证过程(该限制我暂时去掉，提高体验)
+4. 特别警告: 该实验室是一个Docker沙盒环境，注意个人信息保密
 
 
-## Development
+同时，也做了一些优化:
+1. 暂时去掉了Google人机验证，方便没有翻墙的用户，提高用户体验
+2. 工作台镜像保持最新Docker社区版本，当前是 `17.05.0-ce`-TODO
+3. 为快速拉取镜像，添加了多个镜像加速器(包括网易云、阿里云和DaoCloud)
+4. 使用Haproxy做了简单负载和路由，所以你在URL中可以看到host1和host2两种地址
+5. 部署在网易云基础服务的云主机中
 
-Start the Docker daemon on your machine and run `docker pull franela/dind`. 
+如有发现实验室不可用，欢迎随时联系我。
 
-1) Install go 1.7.1 with `brew` on Mac or through a package manager.
+## 四、使用
+以 `Hello world` 和 `Nginx` 为例，初步介绍该实验室的使用。
 
-2) `go get -v -d -t ./...`
+访问[首页](http://labs.bingohuang.com)， 点击`开启一个新实验室`，点击`+创建工作台`，点击终端界面，记住`Alt+Enter`可切换全屏。
 
-3) Start PWD as a container with docker-compose up.
+在终端中，运行 `Hello world`:
+```
+docker run hello-world
+```
+继而会下载镜像并运行容器，终端输出如下:
 
-5) Point to http://localhost and click "New Instance"
+![terminal-hello-world](http://bingohuang.nos-eastchina1.126.net/docker-labs%2Fterminal-hello-world.png)
 
-Notes:
+在终端中，运行 `Nginx`:
+```
+docker  run -d -p 8080:80 nginx
+```
+同样也会下载镜像并运行容器，`-d`将容器置于后端运行，`-p`设置端口映射。
 
-* There is a hard-coded limit to 5 Docker playgrounds per session. After 4 hours sessions are deleted.
-* If you want to override the DIND version or image then set the environmental variable i.e.
-  `DIND_IMAGE=franela/docker<version>-rc:dind`. Take into account that you can't use standard `dind` images, only [franela](https://hub.docker.com/r/franela/) ones work.
+此时，在控制台的IP地址右边(需`Alt+Enter`切换为非全屏)，将会出现你映射的容器端口，点击后可以访问你的Web应用。
 
+![terminal-nginx](http://bingohuang.nos-eastchina1.126.net/docker-labs%2Fterminal-nginx.png)
 
-## FAQ
+是不是挺酷的，还不赶紧来[体验](http://labs.bingohuang.com/)下!
 
-### How can I connect to a published port from the outside world?
+> 下篇文章，我将介绍一些更极客的内容，包括该Docker实验室的安装部署以及Swarm集群的搭建，敬请期待，同时已开源在Github中，欢迎Star。
 
-~~We're planning to setup a reverse proxy that handles redirection automatically, in the meantime you can use [ngrok](https://ngrok.com) within PWD running `docker run --name supergrok -d jpetazzo/supergrok` then `docker logs --follow supergrok` , it will give you a ngrok URL, now you can go to that URL and add the IP+port that you want to connect to… e.g. if your PWD instance is 10.0.42.3, you can go to http://xxxxxx.ngrok.io/10.0.42.3:8000 (where the xxxxxx is given to you in the supergrok logs).~~
-
-If you need to access your services from outside, use the following URL pattern `http://pwd<underscore_ip>-<port>.<host#>.labs.play-with-docker.com` (i.e: http://pwd10_2_135_3-80.host3.labs.play-with-docker.com/).
-
-### Why is PWD running in ports 80 and 443?, Can I change that?.
-
-No, it needs to run on those ports for DNS resolve to work. Ideas or suggestions about how to improve this
-are welcome
+## 五、参考链接
+- [`Docker Cool hacks`](https://blog.docker.com/2017/04/dockercon-2017-mobys-cool-hack-sessions/)
+- [`Play with Docker`官方体验版](http://labs.play-with-docker.com/) - 请自备梯子
+- [`Play with Docker`开源地址](https://github.com/play-with-docker/play-with-docker)
+- [`Docker Labs`网易云版](http://labs.bingohuang.com/) - 访问无障碍
+- [`Docker Labs`开源地址](https://github.com/bingohuang/docker-labs)