openstack installation in Linux

This is the Exmaple of building Cloud Computing infrastracture by OpenStack
Please learn simply description about OpenStack below before building.

(1) Main Components of OpenStack

Service	Code Name	Description
Identity Service	Keystone	User Management
Compute Service	Nova	Virtual Machine Management
Image Service	Glance	Manages Virtual image like kernel image or disk image
Dashboard	Horizon	Provides GUI console via Web browser
Object Storage	Swift	Provides Cloud Storage
Block Storage	Cinder	Storage Management
Network Service	Quantum	Virtual Network Management

(2) Services which the components of OpenStack needs Type Software Which needs Virtualization libvirt ( KVM, Xen ), LXC, VMware nova-compute Database MySQL or PostgreSQL, SQLite keystone, glance, nova Web Server Apache HTTP, Nginx horizon Message Service RabbitMQ, Apache Qpid nova Cache Service memcached horizon

OpenStack is easily installed using a package called Packstack. Redhat is one of the primary contributors to packstack and this method  is similar to the installation of RDO, described here
 
The procedure is quite simple:
Install Redhat, Fedora or Centos on one or more x86 servers.
I installed the minimal Centos installation on a Dell OPTIPLEX 790
Install and configure NTP - network time protocol
# yum install ntp
# chkconfig ntpd on
# ntpdate pool.ntp.org
# /etc/init.d/ntpd start
Install the Fedora repo for grizzly
# yum install -y http://rdo.fedorapeople.org/openstack/openstack-grizzly/rdo-release-grizzly-2.noarch.rpm

CIO, CTO & Developer Resources

Install packstack
# yum install -y openstack-packstack
Generate an answer file
# packstack --gen-answer-file=/root/grizzly_openstack.cfg

please find grizzly_openstack.cfg

How to Minimize Skype to System Tray

Due to the new design behavior guideline for Windows Taskbar on Windows 7, more and more software application has now making its icon to locate and stick at Windows 7 Taskbar when minimized, instead of minimizing to system tray (notification area).
The most common example in Windows Live Messenger, and now Skype 4.2 (download Skype) follows the footstep.

In Skype 4.2 or any newer versions, Skype will be minimized to Taskbar, as an icon or button, when the Skype main window is closed. In previous versions, such as Skype 4.1, 4.0 and 3.0, Skype is typically minimized to system tray, which now known as notification area, right beside the clock on Windows Taskbar when the main window is closed.
Leaving the Skype program running on Windows Taskbar is not very useful to many users, especially notifications alert will pop up informing user when there is new incoming call, instant message (IM), files, contacts, events and etc. The Taskbar icon or button is prone to mistakenly or accidentally click and activate, and the Skype window is also subjected to rotation when user jumping around tasks with Alt+Tab or Win+Tab keyboard shortcuts.
In order to make Skype minimize and hide its icon into notification area or system tray when minimized, users can use the same trick to minimize Windows Live Messenger MSN Messenger to system tray in Windows 7. Here’s how to minimize Skype to notification tray on Windows 7.
Updated Skype Built-In Method

1. In Skype, go to Tools -> Options.
2. Then, click on Advanced tab to go to Advanced settings.
3. Uncheck and untick the Keep Skype in the taskbar while I’m signed in option.
4. Click Save button, and the Skype button or icon will be removed from Taskbar on minimize.

Note: You won’t see the option if the Skype is in compatibility mode.
Compatibility Mode Method

1. Exit or quit from Skype program.
2. Right click on Skype icon on Desktop or Skype shortcut in Start Menu, and select Properties.
3. Go to Compatibility tab.
4. Under “Compatibility Mode’ section, check and tick the checkbox for Run this program in compatibility mode for: option.
5. In the below drop-down box, select Windows Vista (Service Pack 2).  
6. Click OK.
7. Start the Skype program, and now it should minimize to system tray.