Joe McKendrick reviews Jason Bloomberg's new book and posits that public
cloud is better than private cloud and he provides twelve very valid reasons.
Yes, the debate is fierce between private and public..... security, cost,
In response, here are my twelve reasons why private cloud is better than
Your organization controls the network and infrastructure of a private cloud
You don't incur high MPLS costs - network costs to transfer data and
workloads between your datacenter and the public cloud You are not
susceptible to public cloud outages - Amazon apologized to Netflix in
December What does it actually cost to use public cloud ? - Cloudyn can help
you calculate Can you be compliant in the public cloud? New PCI standards
help Is your data secure in the public cloud? here is one example You can
appropriately size a private cloud instance,... (more)
To learn more about Cloud IaaS offerings, I painlessly setup Cloudstack, from
Citrix, on two (outdated and defunct) DELL Optiplex 740 desktop computers.
Each desktop is configured with 8GB of memory and the processors are VT
compatible (meaning they can run virtualization technology software – a
At first attempt, the Cloudstack software would not recognize the internal
disk drives. Thinking that my old hardware would not run cloudstack, I
researched the non-descript error and decided that the installer was not able
to detect the disks because of the pre-existing soft... (more)
OpenStack is an Infrastructure as a Service offering. (see my prior post for
an explanation of IaaS).
OpenStack is an OpenSource project, founded by RackSpace, NASA and others.
OpenStack can be deployed as a public or private cloud.
The OpenStack projects are: CINDER, GLANCE, KEYSTONE, NOVA, QUANTUM, SWIFT.
OpenStack Compute: (NOVA)
Project NOVA, or OpenStack Compute, provisions and manages on-demand virtual
machines and associated resources: CPU, Memory, Disk and Network.
Virtual machines can be started, stopped, suspended, created and deleted,
while network options for a ... (more)
I previously wrote a review of the Microsoft Azure public cloud and
included a comparison between Azure and AWS (Amazon Web Services) and will
now compare OpenStack and VMware vCloud. For a review of IaaS (Infrastructure
as a Service) see my blog post and video.
This table provides a simple and high level comparison of OpenStack and
Feature OpenStack VMware vCloud Virtualization layer Type 2 virtualization -
Libvirt layered on top of Linux. Supports various hypervisors: XEN, KVM,
HyperV... Type 1 virtualization - bare metal; vSphere hypervisor only.
Management Open API... (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)