Category Archives: PowerShell

How to find dependencies between applications

Hello colleagues. As part of migrations to the cloud most common question is – how to map existing application landscape? How to find all relations of the application being moved? How to see which systems it communicates to?

Actually I already blogged about this some time ago but this time example is a bit more clear. We need to do the following steps to graph our environment:

  1. Enable and collect Windows Firewall logs  for all systems in the environment
  2. Download and install PSQuickGraph
  3. Analyze the logs

For the second step here is the simplest example

And here is what we can get out of it.

apprelgraph

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Let’s ‘graph’ it

So, after some time my  friends and I released the first version on a PSQuickGraph module. It is also available on GitHub. It is  to be able to analyze dependencies in a scripted way.

Let’s give it a try. First you need to do is to install it. To do it, just start PowerShell and issue the following command, which  installs  the module from PS  gallery


Install-Module PSQuickGraph -Scope CurrentUser

Next thing you need to do is to install  graphviz. It is a command line tool which takes the text file in a special format and makes a picture from it. You can take it from here and simply unzip in into a folder. In my case I use c:\temp\graphviz folder. Once it is there you can do some magic.

First –  start PowerShell and say:


Import-Module PSQuickGraph

Now just open this link and copy the contents to the PowerShell window. And in a second  you will see a your first graph made using PowerShell.

You can do a lot more with it,

Enjoy!

How to search for object in Azure

Problem statement

In our environment we have more than one subscription. Even more than two. And this amount grows constantly. What we do with all of this is we support VMs and stuff there. One of the issues is that users usually do not know name of Azure Service which is used to host their VMs, and it so happens that they do not know even their Subscription Name or Subscription ID. To bring up and control their VMs and environments the use some “middleware” which hides all of this info from them. So they usually come to us and say: “here you are a list of VMs we have problems with, please have a look and fix”. Sometimes such list contains not only VMs but storage accounts along with VMs etc. Unfortunately classic azure cmdlets does not provide an option to search for objects in the cloud by their name. On the other hand new Azure Management portal does. It can find objects by name. So I decided to do a little hack end use this API in order to simplify our live.

Continue reading How to search for object in Azure