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.
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?
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)
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
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
Avoid this pitfall: Do not start the presentatio... (more)
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
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)
As a follow up to my article on Infrastructure as a Service, here is a four