the latest stable release of OpenStack, codenamed Grizzly, revolutionizes the wa user authentication works.

I needed a physical machine with one NIC to be able to have two different IP addresses on two different VLAN’s.

一直以来，对于openstack 的初学者来讲，安装往往是入门的头大难题。

I’m back with another “how to” article on Open vSwitch (OVS), this time taking a look at using GRE (Generic Routing Encapsulation) tunnels with OVS.

In this post, I’m going to introduce you to the concept of Linux network namespaces.

When using the Open vSwitch Quantum plugin with GRE there can be problems connecting to some sites while other sites work fine.

This post is based assumption that KVM as hypervisor, and Openstack is running in Grizzly on top of RHEL6.4.

将《The Art of Readable Code》的读书笔记和一点自己的认识总结起来写就这么一篇博客，强烈推荐此书。

Like AWS CloudFormation, Heat allows to create auto scaling stacks.

一直以来，关于敏捷软件开发的书读了不少，但是一到自己亲自实施scrum 的时候感觉有些茫然了。

Github本身就是不错的代码社区，他也提供了一些其他的服务，比如Github Pages，使用它可以很方便的建立自己的独立博客，并且免费。

写博客这个这么古老的行为，还有必要拿出来说吗，我看有。