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Virtualization and Cloud

Jonathan Gershater

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Top Stories by Jonathan Gershater

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, control, compliance In response, here are my twelve reasons why private cloud is better than public 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)

Easy Install of Cloudstack on Defunct Hardware for a Home Lab

To learn more about Cloud IaaS offerings, I painlessly setup Cloudstack, from Citrix, on two (outdated and defunct) DELL Optiplex 740 desktop computers.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 hypervisor). 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)

Overview of the OpenStack Cloud

Overview 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)

A Comparison Between OpenStack and VMware vCloud IaaS Offerings

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 vCloud. 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)

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)