Cloud Foundry体验

注册：

http://cloudfoundry.com/ 注册完了等一会会收到一个随机密码

登陆系统后可以创建Micro Cloud Foundry，接着可以下载一个可以用VMWare打开的镜像。下面的操作不需要下载这个镜像。

安装vmc：

Installing Ruby and RubyGems:

    sudo apt-get install ruby-full rubygems

    sudo gem install rubygems-update

    sudo /var/lib/gems/1.8/bin/update_rubygems 

Installing vmc:

    sudo gem install vmc

Specify the Cloud Foundry target

# vmc target api.cloudfoundry.com

Successfully targeted to [http://api.cloudfoundry.com]

# vmc login

Successfully logged into [http://api.cloudfoundry.com]

#vmc info

VMware's Cloud Application Platform

For support visit http://support.cloudfoundry.com

Target:   http://api.cloudfoundry.com (v0.999)

Client:   v0.3.15

User:     <##############>

Usage:    Memory   (0B of 2.0G total)

          Services (0 of 16 total)

          Apps     (0 of 20 total)

          

A simple Ruby Hello World application using Sintatra

Install Sinatra Web framework

# gem install sinatra

# mkdir -p /usr/bob/sample-apps/hello

# cd /usr/bob/sample-apps/hello/

# vim hello.rb

require 'sinatra'

get '/' do

        "Hello from Cloud Foundry"

end

Push hello to cloudfoundry:

# vmc push

Would you like to deploy from the current directory? [Yn]: y

Application Name: feisky

Application Deployed URL [feisky.cloudfoundry.com]: 

Detected a Sinatra Application, is this correct? [Yn]: 

Memory Reservation (64M, 128M, 256M, 512M, 1G, 2G) [128M]: 

Creating Application: OK

Would you like to bind any services to 'feisky'? [yN]: 

Uploading Application:

  Checking for available resources: OK

  Packing application: OK

  Uploading (0K): OK   

Push Status: OK

Staging Application: OK

Starting Application: OK

接着打开http://feisky.cloudfoundry.com/就可以访问刚才发布的app

可以通过下面的命令查看已有的apps：

# vmc apps

+-------------+----+---------+-------------------------+----------+

| Application | #  | Health  | URLS                    | Services |

+-------------+----+---------+-------------------------+----------+

| feisky      | 1  | RUNNING | feisky.cloudfoundry.com |          |

+-------------+----+---------+-------------------------+----------+

更新已有的app：

# vmc update feisky

Logging

root@localhost:~# vmc files feisky logs （当前有哪些log文件）

stderr.log                                185B

stdout.log                                217B

root@localhost:~# vmc files feisky logs/stdout.log （读log文件的内容）

== Sinatra/1.2.1 has taken the stage on 54337 for production with backup from Thin

>> Thin web server (v1.2.11 codename Bat-Shit Crazy)

>> Maximum connections set to 1024

>> Listening on 0.0.0.0:54337, CTRL+C to stop

If you suspect that your application has crashed recently, run vmc crashes <appname>which will provide you with more information:

prompt$ vmc crashes hotels 

Use vmc crashlogs to get more detailed information about the crash:

prompt$ vmc crashlogs hotels 

Managing the Application Lifecycle：

# vmc restart feisky

Stopping Application: OK

Staging Application: OK

Starting Application: OK

# vmc start feisky

# vmc stop feisky

# vmc rename old-name new-name

# vmc delete feisky

Avoiding Downtime When Updating The Deployment Bits

 vmc push feisky-new

 vmc map feisky-new feisky.cloudfoundry.com

 # vmc apps

+-------------+----+---------+------------------------------------------------------+----------+

| Application | #  | Health  | URLS                                                 | Services |

+-------------+----+---------+------------------------------------------------------+----------+

| feisky      | 1  | RUNNING | feisky.cloudfoundry.com                              |          |

| feisky-new  | 1  | RUNNING | feisky-new.cloudfoundry.com, feisky.cloudfoundry.com |          |

+-------------+----+---------+------------------------------------------------------+----------+

此时，访问feisky.cloudfoundry.com，有的时候会访问到老版本，有的时候会访问到新版本

Disassociate the old application from its original deployment URL:

# vmc unmap feisky feisky.cloudfoundry.com

Disassociate the new application from its new deployment URL：

# vmc unmap feisky-new feisky-new.cloudfoundry.com

Delete old application:

# vmc delete feisky

Monitering

# vmc stats feisky-new （当前的资源占用情况）

+----------+-------------+----------------+--------------+---------------+
| Instance | CPU (Cores) | Memory (limit) | Disk (limit) | Uptime        |
+----------+-------------+----------------+--------------+---------------+
| 0        | 0.0% (4)    | 17.2M (128M)   | 44.0K (2G)   | 0d:0h:12m:20s |
+----------+-------------+----------------+--------------+---------------+

# vmc mem feisky-new 512
Updating Memory Reservation to 512M: OK
Stopping Application: OK
Staging Application: OK                                                         
Starting Application: OK                                                        

# vmc stats feisky-new  （改变应用的内存上限）

+----------+-------------+----------------+--------------+-------------+
| Instance | CPU (Cores) | Memory (limit) | Disk (limit) | Uptime      |
+----------+-------------+----------------+--------------+-------------+
| 0        | 3.9% (4)    | 17.0M (512M)   | 40.0K (2G)   | 0d:0h:0m:5s |
+----------+-------------+----------------+--------------+-------------+

#  vmc instances feisky-new 4 （将应用的实例数改为4）
Scaling Application instances up to 4: OK

# vmc stats feisky-new  

+----------+-------------+----------------+--------------+--------------+
| Instance | CPU (Cores) | Memory (limit) | Disk (limit) | Uptime       |
+----------+-------------+----------------+--------------+--------------+
| 0        | 0.1% (4)    | 17.0M (512M)   | 40.0K (2G)   | 0d:0h:1m:21s |
| 1        | 2.7% (4)    | 17.0M (512M)   | 40.0K (2G)   | 0d:0h:0m:6s  |
| 2        | 3.6% (4)    | 17.0M (512M)   | 40.0K (2G)   | 0d:0h:0m:6s  |
| 3        | 3.4% (4)    | 17.0M (512M)   | 40.0K (2G)   | 0d:0h:0m:6s  |
+----------+-------------+----------------+--------------+--------------+

总结：

Cloud Foundry是VMware用Ruby实现的业界首个开源PaaS平台，支持多种语言(Ruby、Java、Javascript、Python、 PHP等)以及开发框架(Rails、Sinatra、Spring、NodeJS等)，能集成各种后端serivce(Mysql、MongoDB、Redis等) 支持多种云计算平台，能提升开发者的生产力，加速软件开发部署。