Tag Archives: VSAN

Why you should protect your Virtual SAN Network

As a common best practice you should separate management, vMotion and Virtual SAN traffic from production traffic. This is not only a performance requirement, but also for security concerns. Compared to management traffic which is encrypted and requires authentication and vMotion traffic which is impracticable to eavesdrop, Virtual SAN traffic presents a large surface area to attacks.

This article explains why it is critical to keep Virtual SAN traffic in protected networks and what can happen when you ignore this guideline. I am also explaining how you can detect and monitor such attacks.

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Building a Single-Node VSAN

single-node-vsanI was wondering if it possible to speed up my Intel NUC based ESXi with Virtual SAN. The idea is that compared against vSphere Flash Read Cache, Virtual SAN can use the SSD not only as read cache but also as write buffer. This post explains how you can create a Virtual SAN Datastore on a single ESXi host from the command-line without a vCenter Server.

It goes without saying that this is neither the idea behind Virtual SAN nor officially supported by VMware. It also violates VMware's EULA if you are running Virtual SAN without a VSAN license. To assign a licence you need a vCenter Server and wrap the single ESXi into a Cluster.

My configuration for this test:

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Manage Virtual SAN 5.5 with RVC - Complete Guide

This is a comprehensive guide to manage your VMware Virtual SAN with the Ruby vSphere Console. RVC is an interactive command line tool to control your platform. If you are new to RVC, make sure to read the Getting Started with Ruby vSphere Console Guide. All commands are from the latest vSphere 5.5 Update2 release.

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VMware VSAN on Intel NUC - Mobile Cluster for $2000

Small, silent, transportable and a very low power consumption. That's the Intel NUC. It's not only a great system for Homelabs, or Homeservers - It can also be used to build a portable Virtual SAN Cluster. I ordered 3 NUCs to build a VMware Virtual SAN enabled Cluster.


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PowerCLI Script to Calculate VSAN VSPP Points

VMware includes Virtual SAN in their VSPP program. Unfortunately their vCloud Usage Meter, the tool that helps to create a license report, does not support Virtual SAN by now. I wrote a little PowerCLI script to gather the required information.


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Reuse VSAN Claimed Disks as VMFS Datastore

During a test I used an old disk that has been previously used by Virtual SAN. The disk did not appear during the datastore creation process. I miss a flash drive here:

datastore-creationThe problem is that the disk has not been cleared from it's VSAN configuration. It has still valid VSAN partitions, so the ESXi "claims it for VSAN" what makes it impossible to create a VMFS filesystem.

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Online VMware Virtual SAN Sizing Tool

The new web based Virtual SAN Sizing Tool provides assistance for design considerations for a Virtual SAN infrastructure. Based on given requirement the tool provides full detailed specifications. Input parameters are split into 2 separate sections: Virtual Machine Characteristics and Host Hardware Characteristics.


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VSAN - What does CLOM, OSFS and CMMDS stand for?

With the release of VMware Virtual SAN we have several new acronyms and abbreviations. What does they stand for? I've created a shot list about all abbreviations that might arise around VSAN:

  • CMMDS - Cluster Monitoring, Membership, and Directory Service
  • CLOMD - Cluster Level Object Manager Daemon
  • OSFSD - Object Storage File System Daemon
  • CLOM - Cluster Level Object Manager
  • OSFS - Object Storage File System
  • RDT - Reliable Datagram Transport
  • VSANVP - Virtual SAN Vendor Provider
  • SPBM - Storage Policy-Based Management
  • UUID - Universally unique identifier
  • SSD - Solid-State Drive
  • MD - Magnetic disk
  • VSA - Virtual Storage Appliance
  • RVC - Ruby vSphere Console

VMware VSAN License Calculator

VMware Virtual SAN and its pricing model is now available. The pricing model is very simple and, just like the model for the hypervisor, based on CPU sockets. There is no feature, capacity or scale limit. VSAN has to be licensed on top of the hypervisor and the whole cluster has to be licensed. This implies that you have to license each host in the cluster, even when it does not have any local disks and is only part of the cluster as a VSAN Agent. A more detailed description of VSAN licensing is available here.

I've created a VSAN License Calculator. Just enter the number of hosts and sockets per host in your cluster and it will calculate the total price of all required VMware products. It also includes a license cost breakdown which shows the price for each component separately.


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VMware Virtual SAN Licensing and Pricing

Last week, VMware has announced the general availability of VMware Virtual SAN. At a webcast event that was held a few days ago they did not release licensing and pricing information. Today VMware disclosed the secret: Virtual SAN is priced at $2,495 per CPU and at $50 per user for VDI deployments. Let's see how competitors at the Hyper-Converged market like Nutanix, Simplivity, Pivot3 or Scale Computing will react. vsan-vmware-virtual-san-box

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