As my knowledge of Powershell has increased, so too has the length and complexity of the scripts I create. My current record for example is a 387 line script. How did I keep track of all of the changes in a script of this length?

Not very well I’m afraid. I knew there had to be a better way. I was familiar with the concept of Source Control from the likes of Team Foundation Server but had never looked into it. As I sat down to figure out what my solution would look like, I identified the following requirements:

• The source control system, whatever it is must be integrated with PowerGUI as that is my editor of choice
• It must offer some kind of online component either that I host myself or is hosted by a third party so I can maintain a single repository from both work and home

As you can see, my requirements are rather universal and I’m sure are shared by other aspiring Powershell script writers around the world. So you can imagine my surprise then when upon starting my research into options I was surprised to find remarkably little information on this subject. There were pockets of information but they were scattered at best and others simply did not seem to exist.

That’s why I created this HOWTO. It represents many, many hours of trial and error on my part to come up with a Powershell centric source management system. Not only will this guide identify what you need and explain HOW to install it but it will also delve into WHY it is configured this way. My pain is your gain. So with that out of the way, let’s get started!

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Note: The following was tested with PowerGUI 3.8.0.129.

As I have gotten more confident with Powershell, my scripts have grown longer and longer. I use PowerGUI as my IDE of choice and I have been quite happy with it. One of the problems I’ve increasingly run into however is that as the code grows in length, it becomes harder to visually read and follow the code to pinpoint what you want to work on. I know that Powershell supports the Region/EndRegion commands but that still made it difficult to distinguish one section from another visually. I looked into alternatives but after fairly extensive Google searches was surprised to find on one else commenting on this. I did however find a PowerGUI addon called “Script Colors”. Unfortunately that didn’t offer any configuration for the region command but did discover that this script was just making modifications to an XML configuration file. I then decided I’d see if I couldn’t tackle this myself. Before we delve into how to do this though, let me show you what the end goal is.

The first screenshot below is of the default color scheme in PowerGUI. (Note the code is random gibberish and is there only to fill space for the purposes of this demonstration)

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What do you do when you need to provide a password in a batch file or to a legacy command line application but don’t want to store the password in plain text inside of the file? As usual, it’s Powershell to the rescue.

The basic steps are:

1. Create a text file that contains the encrypted version of your password
2. Read that password into a variable
3. Convert that password into a Credential Powershell object
4. Call a method of the credentials object to pull out the plain text password

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During a recent swim, I happened to overhear a conversation between two other people in the pool that was distinctly Korean. I introduced myself and we ended up having a great chat that was probably 70% Korean. After that encounter, I came to the realization that I’ve learned enough of the language that I’m right on the precipice of basic fluency in Korean. To that end, I decided, to resume my Korean studies. One of the skillsets I wanted to work on was my ability to touch-type in Korean. I’m already reasonably OK at the task and can type in Hangul without looking at the keyboard. But I still make a ton of mistakes which of course frustrates the learning process. I decided the first thing I need to do was to obtain that last 15% and master Korean typing. I then went out searching for a Mavis Beacon style typing tutor for Korean. It turns out there is one that rises above all others called 한메타자교사.

Unfortunately, the application was written in 1999 and as such had two issues, one highly annoying and one show stopping. The first is that the application is hard coded to run at 640×480. The second is that it has a really clever game built in that for some reason doesn’t allow accept Korean input. I suspected this had to do with the fact that I was running the application on an English language Windows base OS with Korean language added as an additional IME. After much troubleshooting and trial and error trying to solve the symptoms, I decided to go for broke and fix the problem at the source.

I checked the build date on the executable and it was written in February of 1999. According to this Wikipedia (http://en.wikipedia.org/wiki/Timeline_of_Microsoft_Windows), the most recent version of Windows available at the time this application was written was Windows 98.

I then scoured the Internet to try to find an ISO for the Korean version of Windows 98. This proved to take a lot longer than I would have otherwise expected. But I did eventually find one and installed KO_Win98 into a virtual machine. (As an aside, holy hell I forgot how long Windows 98 takes to install. Even with the modern CPU, memory and SSD backend, it still took almost half an hour to install and *4* reboots! We truly live in the golden age).

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Last year I watched an absolutely fantastic two day training session on Powershell now available here:

http://www.microsoftvirtualacademy.com/training-courses/getting-started-with-powershell-3-0-jump-start

Among the many things I learned from that training, one quote from one of the trainers really stuck out with me. Jeffrey Snover, the inventor of Powershell said “Powershell is designed to solve business problems.”

The take away for me from that quote is that Powershell can be an incredible vehicle for building complex automation tools that can be shared with your entire company and beyond. But also, sometimes you have business problems that are much simpler and “one-off” in scope. It turns out Powershell shines brightly here too. I’d like to give you a quick example of how I used Powershell to quickly solve a personal “business” problem in what otherwise would have been very frustrating.

I am starting to revisit the idea of finally learning Korean – enough to be actually properly conversational. With that goal in mind, I found a Korean aptitude test on the Internet. It was 70 questions and increased in difficulty as you worked your way through the list. I thought this was a great place to sink my teeth into the language again. However, I decided that I would much prefer to have these questions inside a “Visual CertExam” or VCE file. This works with an application called the VCE Designer and VCE Manager to present electronic multiple choice exams. “Wouldn’t it be cool if I could somehow import this exam into a VCE file so I could quiz myself? The question is, how could I do that? Let’s start with a sample of what the source material looks like:

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This HOWTO describes how to reconfigure an existing NetApp DataFabric Manager installation with preexisting Snap Vault relationships when the primary hostnames and IPs change and to accomplish all of this without needing to re-baseline.

Consider the situations where you have a NetApp Filer that you want to replace with a new Windows file server but you want the Windows server to continue to backup the data via an already existing OSSV relationship.  Or more specifically:

Before you can do anything inside of DFM, you need to update the Snapvault relationships themselves.  NetApp does a good job of documenting these steps here:

https://kb.netapp.com/support/index?page=content&id=1010282&locale=en_US

Unfortunately, I couldn’t find any documentation for the DFM update hence the need for the documentation below.

• Log into DFM and go to Control Center / Member Details / Physical Systems and select the Physical NetApp Filer
• On the left hand pane, choose Edit Settings

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This HOWTO describes how to rename a VMware virtual machine’s underline files inside the VMFS file system.  It turns out that the name that is displayed in the vSphere Web Client and VI Client is simply a display name.  It is actually attached to an underline UUID that describes that machine.  That UUID is associated with a physical folder and files in the file system.  When you rename a virtual machine from inside the host and even when you rename it from vCenter, these files do not change.  This can lead to future confusion when you find what you think is an old VM and try to delete it.  Following the steps below will ensure that the machine name is consistent throughout the VMware ecosystem.

Important Note: Unless you’re comfortable with the steps below, do not proceed.  This is one of those cases where literally one wrong character can permanently corrupt a VM – or worse.

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This HOWTO describes how to create a bootable USB recovery CD for Macrium Reflect. This in itself isn’t terribly useful in itself as the Reflect Software offers an excellent GUI based wizard to accomplish this. However, the default Windows PE environment it creates does not include ISCSI support which means if your backups are stored on an ISCSI NAS as mine are, it will not be possible to actually connect to your storage to restore your backups after a disaster. Following this guide will enable you to restore Reflect based backups off ISCSI storage.

• An important note: When you first run Reflect and a new Windows PE version is available, it’ll prompt you and ask to make a 401MB download from Microsoft. I thought this was the Windows Assessment and Deployment Kit (WADK) for Windows 8.1 but it only includes a subset that doesn’t include the additional packages we need to make ISCSI work. So before you begin this process, download the WADK for Windows 8.1 (http://www.microsoft.com/en-us/download/details.aspx?id=30652)
• You only need Deployment Tools and Windows Preinstallation Environment (Windows PE)
• Also, if you already have the Windows 8.0 ADK installed, you will need to manually uninstall it before proceeding to install the Windows 8.1 ADK. In other words, ensure your WADK version matches your Windows PE version

   

  

   

• The base Reflect WIM image they already created for us that includes the Reflect recovery software can be found at C:\boot\Macrium\WA5KFiles\media\sources\boot.wim
• So to make sure we don’t break that, let’s make a copy

  copy “C:\boot\Macrium\WA5KFiles\media\sources\boot.wim” to c:\temp\reflect.wim
  

• Create folder called c:\mnt that we will use the mount the WIM image and then mount it with the command below
  

  md c:\mnt
  

  dism /mount-image /imagefile:c:\temp\reflect.wim /index:1 /mountdir:c:\mnt
  

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In our environment, we have configured vRanger to backup with the equivalent of 2 full backups and 6 incrementals before the earliest backup is overwritten.  This provides some protection against a single full backup becoming corrupted for whatever reason and rendering the entire backup of that virtual machine useless.  However, this configuration does add a significant complication.  Because vRanger requires that a backup be written successfully before purging the oldest one, this means that we requires 3x the space on our backup repository as is used in the production environment.  As most of our VMs are in the 50 to 100GB range, this is acceptable.  However, we have 4 VMs that are at or over 1TB in in size.  This means that we require 4TB * 3 copies = 12TB of disk space on our repository just for these VMs!  This doesn’t even include the incrementals either.  We simply do not have enough space on our backup repository at this time to support this along with all of our other VMs so a compromise was required.

vRanger jobs unfortunately do not allow for any kind of granularity in VM backup configuration so we are unable to adjust for these VMs there.  We could create separate jobs for these VMs but that introduces complications of its own.  The ultimately solution that I worked out as to write a Powershell script to run as a scheduled task each day that automatically deletes the oldest full backup for these VMs provided at least 2 exist.  It seems to work fairly well so I figured I’d include it here should it be useful to anyone else.

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This is going to be one of the more unusual HOWTOs I’m likely ever to produce for this site. It all started earlier today when I asked myself a seemingly simple question:

What is the average weight of famous celebrities that are roughly my height and age?

I was curious because I was wondering how far off the mark I currently was in terms of weight compared to what pop culture considers attractive.
In this day and age, finding the stats on celebrities is frighteningly simple. Aggregating those stats into something meaningful to my question however proved to be more complex.
First and foremost, I’d like to give full credit to the website with which the following information is based on:

http://www.celebheightandweight.com/actor.html

With that out of the way, let’s have a look at their site:

It looks nice enough. The vital statistics of over 400 celebrities are listed here. However, filtering it to get the information I wanted was impossible.
The only option then would be to extract and compile the data myself. Let’s begin shall we?

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