Tech Chronicles


vSan SPBM Cheat Sheet (Stretched Cluster)

Before accepting this page as a reference, I strongly suggest you to review the article I wrote about SPBM again. You can  find the page here.

VMware vSan Storage Policy Based Management (SPBM)

I’ll try to elaborate on the Storage Policy Based Management (SPBM) what I’ve briefly describe in my previous article.  Protection types specified in SPBM are Datastore Default, per-VM and per-vmdk.

You can review Storage Policy Rules in vendor resources for further details.

VMware vSAN

VMware vSan can be called as a technology that allows locally attached disks that are installed on the server to create a clustered disk space, or as Distributed Object-Based Storage. It reduces complexity eliminating the  physical storage layer.

Since vSan is embedded in the hypervisor, what you need to do is only to activate it via vSphere and a separate installation is not required.

It can be taken as vSan ReadyNode from a variety of compatible vendors and make your own installation, Also can be taken as ready-to-use solutions like Dell VxRail. You can also check whether your existing hardware is vSan compliant from here  and licensing for version 6.7 here

Virtualization Infrastructure Architectures

In this article I will briefly summarize the traditional, converged and hyper-converged infrastructures.

Looking at the layers of x86 virtualization, the following basic components are seen;

  1. Physical server
  2. Virtualization software
  3. Storage
  4. Network devices

Easy deployment with Samsung Knox

Samsung has made many enhancements to the Knox platform over the past few years, and some of them have also been retired.

“Knox IT Solutions leverages the Knox platform and delivers end-to-end solutions for IT managers, such as configuration and deployment, managing, securing, and maintaining devices.”

When Android zerotouch deployment feature was announced by Google, Samsung devices had been excluded from this program, You think this is a problem for Samsung? Not really, because they’d already developed a similar solution called Knox. The auto-enrollment feature for your EMM environment can be called the most exciting feature here.

Using the Vi Editor

What is the Vi editor?

Vi is a Notepad-like tool for editing text files from the command line, widely used in the Linux/Unix community. Although it was often thought that Unix had been written by this tool, Vi was originally developed by Bill Joy in 1976. (Unix is based on the year 1969.) According to my personal experience, I can say that 50% of Linux/Unix use is Vi. The beginners have bad experience of editor usage and usually cool open source operating systems off when they are not comfortable to use. (The remaining 50% is the use of shell)

Introduction to VMware vSphere

In this article I will talk about the basic VMware vSphere components as small definitions.

Introduction to Virtualization

Although the use of virtualization, which is now indispensable for information technologies, is 10 years in the x86 community, Unix/Linux users have been benefited from the older time.

So what is virtualization?

Basically, it’s a technology that improves productivity by sharing the hardware resources on the server across multiple virtual servers. For now, I’m going to go over this definition and the server special.

Linux File System Hierarchy

It can be a bit tricky to detect and understand the Linux file system for years using the Microsoft operating system.

Basically, the Linux/Unix operating systems include hardware resources, but the “everything” is considered a file.

For example, “/proc/partitions” specifies the partitions on the disk, whereas “/dev/eth0” specifies the connected network adapter.

The following diagram shows the file system hierarchy of a Linux operating system based on Redhat/Centos.

Now let’s try to explain the structure one by one.

Apple Volume Purchase Program (VPP) and Apple Device Enrollment Program (DEP)

What is the Apple Volume Purchase Program (VPP) and the Apple Device Enrollment program (DEP)?

VPP is the solution that enables Apple to deploy applications from single point and manage licenses with mobile device management software on the enterprise side.

Exchanging keys and configuration are performed between mobile device management (MDM) and Apple Business Portal, which is basically used. Paid or free applications via VPP portal are taken up to the number of needs. One-point license management can be performed when this software is synced in an MDM environment. A corporate email address that has not been previously registered with the APP Store needs to be used.

As an example, 20 of X software were purchased and the relevant groups were assigned these software. Then, let’s say that 5 people from the assigned groups have left their jobs (even they did not return their devices), which in this case is needed from the former owners of wasted software, provides infrastructure for assigning new users to the process of VPP.