Kubernetes Storage on vSphere 101 – The basics: PV, PVC, POD

I’ve just returned from KubeCon 2019 in Barcelona, and was surprised to see such a keen interest in how Kubernetes consumed infrastructure related resources, especially storage. Although I have been writing about a lot of Kubernetes related items recently, I wanted to put together a primer on some storage concepts that might be useful as a stepping stone or even on-boarding process to some of you who are quite new to Kubernetes. I am going to talk about this from the point of view of vSphere and vSphere storage. Thus I will try to map vSphere storage constructs such as…

PowerCLI 6.5 Release 1 and vSAN

The first email I saw this morning in my inbox was from my good pal, Alan Renouf. Alan is our product line manager for APIs, SDKs, CLIs and Automation Frameworks (congrats on the promotion Alan). Anyway, Alan was announcing the General Availability of VMware vSphere PowerCLI 6.5 Release 1. There are a whole bunch of improvements in this release, and much kudos must go to the PowerCLI team. However from a vSAN perspective, things look really cool. [Update] This version of PowerCLI also works with vSAN 6.2 and 6.0, so there is no need for customers to upgrade to vSAN…

vSphere 5.1 Storage Enhancements – Part 2: SE Sparse Disks

This is possibly the most exciting new storage feature in the vSphere 5.1 release. Space Efficient Sparse Virtual Disks (or SE Sparse Disks for short) were designed to alleviate two issues. Let’s describe these issues first of all. Problem Statement #1 – Let’s take a Guest OS running on a linked clone (View desktop if you will), and this Guest OS issues a 4KB write. vmfsSparse disk (which is the format used by traditional linked clones) has a block allocation unit size of 512 bytes. In other words, this Guest OS is backed by 512 byte blocks. Depending on the…