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Virtualization and Cloud

Jonathan Gershater

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Top Stories by Jonathan Gershater

In this posting, I summarize my prior three posts on the three cloud computing offerings: Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). I concentrate how the three offerings differ with respect to flexibility, maintenance and portability. One of the greatest challenges companies face when moving to the cloud is security. Thus I will devote an entire blog post in the future, to security concerns. Flexibility How much flexibility do you have with each offering? What can you change or modify within each cloud offering to suit your needs? Can you modify the software, the look-and-feel, the branding, the hardware even the source code with each cloud offering? Maintenance How much do you need to maintain with each cloud offering? Do you need to hire programmers, data analysts, system administrators or just application... (more)

Installing RDO Grizzly on Centos Using Packstack

OpenStack is easily installed using a package called Packstack. Redhat is one of the primary contributors to packstack and my install experience 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 1950 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/opensta... (more)

How to Deliver Compelling Presentations

Following up on my prior article, how to deliver effective demos, here are some guidelines how to deliver effective presentations. This is a summary of an excellent seminar I attended, given by Tom Sant of Hydeparkpartnerscal We have all sat through PowerPoint presentations crammed with text in 10point font which the presenter often just reads; within a few minutes most of the audience are thumbing their mobile devices or engaged with their laptops. So, in the age of five minute attention spans, how do we keep our audience engaged? Avoid this pitfall:  Do not start the presentatio... (more)

Three Node Install of RDO OpenStack Using PackStack

Following my single server installation of RDO OpenStack using PackStack, here is my install of OpenStack across three nodes. What's key here is the answer files used with packstack. For a single node its trivial since you just accept nearly all the defaults. A distributed install requires a bit of planning. First I installed on two nodes, using packstack from one node (sudo packstack --answer-file=/root/grizzly_openstack.cfg) The answer file for this installation is here, it specifies the location of each component: cinder on one server (.110) with this line: # The IP address of ... (more)

Four Minute Lesson on Infrastructure as a Service

As a follow up to my article on Infrastructure as a Service, here is a four minute video: http://www.youtube.com/watch?v=q6u-KkD53_Y   ... (more)