VM /ETC

Posts Tagged ‘virtual appliance’

Cloud Computing in Plain English is a 4:51 long video from rPath that gives a great overview of Cloud Computing and how virtualization plays a  key role enabling all size businesses to take advantage of utility computing and software as a service (SaaS). The video is lite and humorous, and does a good job comparing traditional software to a luxury car, SaaS as a leased vehicle, and then Cloud Computing as a taxi.

Watch the video to hear how virtualization is the engine of the Cloud Computing taxi, and virtual appliances are the fuel for that engine.

I first heard about the video from Benard Golden’s CIO.com article titled after the video.

rPath is self described on their web site as

“the company that is pioneering the virtual appliance approach for application distribution and management.”

rPath also provides more information about their product offerings that help enable the Cloud Computing strategy.

“rBuilder and the rPath Lifecycle Management Platform automate the creation, configuration, management and maintenance of application images for virtualized and cloud computing environments. By producing application images that are optimized for any hypervisor, rPath frees the application from the underlying hardware, and enables a better model for development, deployment and support.”

This post is a summary of notes from the 1:30 pm VMworld 2008 session titled Managing ESX in a COS-less World. The discussion was about various options for managing ESXi without the Service Console OS (COS). The session was hosted by members of the ESXi team and contained forward looking statements about possible future directions. As always, the disclaimer was discussed with the audience before the presentation began. (Do I need to keep explaining this? Probably the safe thing to do.)

Scott Lowe apparently was in the same session so check his
TA2659: Managing ESX in a COS-less World post for a lot of additional information besides what I have recorded here.  Scott, my 3 finger “peck typing” doesn’t compare to your keyboard skills!

One of the first things mentioned was that the next major release of ESX/ESXi would be the last release of the two products together. I guess this means that ESXi kernel development will be independent of the ESX versions that provide the VDC-OS. We were told ESXi will continue without the COS and that ESX would include a stripped down COS.

There are several reasons VMware needed to remove the COS from ESX. Read the rest of this entry »

I posted a while back about VKernel’s Alex Bakman and his whitepaper on preventing performance bottlenecks on your ESX hosts. This time I am posting about another topic inspired by Alex dealing with how to chargeback for virtualization. More and more companies are beginning to talk about chargeback in virtual data centers, but many struggle with coming up with a formula for actually implementing such a model. VKernel has a great solution for this and provides for download both a free Excel calculator and a complete virtual appliance. I provide a little more information on both of these Vkernel solutions in the rest of this post.
Read the rest of this entry »

Move over Lefthand Networks VSA, xtravirt.com has provided a free alternative for creating a virtual iSCSI SAN. Xtravirt Virtual SAN (XVS) is a virtual machine appliance that runs on two of your ESX hosts’ local VMFS datastores to create a single, synchronized iSCSI SAN. XVS allows the creation of ESX clusters for VI3 Enterprise features without purchasing a physical shared storage solution.

“The Xtravirt Virtual SAN (XVS) appliance for VMware ESX3 Server is a free solution to provide the benefits of shared VMFS storage without the cost of a SAN – this allows the utilisation of otherwise unused local storage in the ESX server to facilitate enterprise level features such as vMotion, DRS and HA normally only available through the use of a shared storage device. All volume data is synchronously replicated between hosts, providing full fail-over capability with data integrity in the event of host, disk or appliance failure.”

XVS is the perfectly priced storage solution for the home ESX test lab, small and mediium businesses, or the small remote branch office.

To download a copy of the virtual appliance and for more about XVS go to xtravirt.com.

updated 5.24.08

Currently XVS is only configurable as a single LUN across paired ESX hosts. A third ESX hosts can use the virtual ip address for it’s SAN, but the additional host(s) would not be using their local storage as part of the synchronized SAN. Future editions will hopefully expand the storage across more than 2 ESX hosts.

This post is more of an idea then a report. If you’ve experimented with a design similar to my thoughts below please post a comment and let me know!

Have you tried to configure VMs in a MS cluster across separate ESX hosts? How about clustering a physical server with a VM? VMware’s guide can be found here. Referencing this guide I am specifically talking about “Clustering Virtual Machines Across Physical Hosts (Cluster Across Boxes)” and “Clustering Physical Machines and Virtual Machines (Standby Host)”.

Read the guide and you’ll find there are several prerequisites and restrictions. The most important ones being:

• you must use RDMs in physical mode for shared storage
• dedicate at least 2 physical nics to the VMs
• you can not use multipathing software
• you must use the LSILogic virtual SCSI adapter in your VMs
• you can only use 32 bit VMs. You can not cluster with 64 bit VMs
• iSCSI disks are not supported. NAS disks are not supported.
• you can only use 2 node clustering
• the boot disks for the VMs must be on local storage
• clustered VMs can not participate in an ESX cluster and use VMotion, DRS and HA

So how do we design a clustered VM application that can fully leverage VMotion, DRS, and HA? Read the rest of this entry »

Unfortunately I slept late Thursday morning. Waking up at 7:30 am in Hayward, CA meant that there was no way short of a helicopter I was going to make it to San Francisco before 9. I’m pretty sure my company would not let me expense a helicopter so I decided to catch up on some email from the hotel until traffic burned off. I also had “Smash Head” from the party Weds night!

blog.scottlowe.org has some great notes on this session. Here’s my thoughts on what I missed. Read the rest of this entry »