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Virtualization and Cloud

Jonathan Gershater

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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/openstack-grizzly/rdo-release-grizzly-2.noarch.rpm Install packstack # yum install -y openstack-packstack Generate an answer file # packstack --gen-answer-file=/root/grizzly_openstack.cfg Since I performed a simple install on one server, I accepted nearly all the defaults presented in the generated ... (more)

Introduction to Cloud Computing for Newbies

Cloud computing is a general term for computing services delivered over the Internet, as opposed to computing services hosted inside your own network; on your own premises. These computing services can be as simple as Internet based email or as complex as a Customer Relationship Management (CRM) application. Cloud computing offers cost savings, because users don't have to invest capital budget to purchase hardware and software, nor expend the operating costs of electric power, space and cooling for the hardware and employee costs of maintaining the hardware and software. The maj... (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)

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)

Cloud Computing Easily Understood - IaaS

Infrastructure as a Service is one of the three delivery methods of cloud computing (the other two are Platform as a Service and Software as a Service). Users of IaaS have the expertise to maintain operating systems and applications, but don't wish to purchase server, storage and networking hardware and a datacenter to house the hardware. The cloud provider provides these services from a shared pool. The cloud user will then use the virtual machines to fulfill their computing requirements and may install their own operating system and will install their own applications on the v... (more)