If there is free booze and Virtualization; I'm there!
Tag Archives: PowerShell
April 25, 2017Posted by on
A few days ago a Zerto prospect reached out to me on LinkedIn with an interesting script request and there is nothing like a good challenge to get me motivated to pull out PowerShell ISE! With over 1000 VMs to protect their key requirement was to log the start and end time of initial syncs. While the ZVR GUI shows when a VPG was created, it doesn’t show when the initial sync finishes:
This is certainly an annoying omission and the lack of specific data points isn’t limited to just Zerto; how many other solutions do you use in your environment where you want to know/see something that just isn’t there for seemingly no logical reason? Of course, you could contact your vendor account manager, raise a feature request, wait 3-6 months and cross your fingers that it was even considered let alone in the product. Or you can use the REST APIs to get the data yourself, today, in minutes!
February 8, 2017Posted by on
When configuring IP address changes in Zerto Virtual Replication (ZVR) one common challenge is data entry. Yes, it’s certainly easy to configure the new IP addresses in the GUI, but when you are protecting hundreds of VMs with hundreds of vNICs then using the GUI can become a problem. Not only will it take you a long time to configure each vNIC one by one, but you are introducing the risk of human error.
To solve this challenge I created 2 PowerShell scripts to fully automate re-IP addressing in bulk. The first script “ZVR Bulk Re-IP Export v1.ps1” exports a list of every protected VM vNIC to a CSV with a column for each configuration item possible. You will need to protect every VM first for its vNIC info to be exported, edit the variables at the top of script for your environment, then run it to get the below output: Read more of this post
July 7, 2016Posted by on
Through my work at Zerto I’ve delivered multiple presentations and webinars on ransomware and how Zerto enables you to recover VMs, files and folders from seconds before the data was encrypted to minimize data loss and avoid having to pay a ransom. One question I’ve often been asked is how do I know what point in time my files were encrypted? And in one recent presentation a customer told me that their user didn’t tell IT until 3 days after the infection had occurred!
This got me thinking on how we could alert on this which led me to evaluate the different ransomware honeypot example scripts available online. These scripts validate a file placed on a user mapped share, where everyone has write permissions, against a gold or witness copy to catch the ransomware infection then perform a set of actions when found. In testing the multiple examples I struggled to find one that coped with the file itself being changed, I.E the extension changing, that ran consistently and none indicated this alert in the Zerto journal so I decided to write an example that did all of this and more. Read more of this post
March 26, 2014Posted by on
To protect VMs with Zerto they need to be placed into Virtual Protection Groups (VPGs) which are consistency groupings of VMs that are typically configured on a per application basis. A VM can only exist in 1 VPG at once, you can only failover the entire VPG and you can define the boot order of VMs inside each VPG.
A common request I receive is to specify a boot order between VPGs (a recovery plan) so that you can bring VPGs online in a specified order with time delays and pre/post failover scripts. A perfect use case is bringing Application 1 (I.E a Finance DB) online before Application 2 (I.E a CRM). You could work around this by placing all the VMs that form both applications in the same VPG, but this then removes the fidelity of failing over an individual application in the cases of logical failures. Another use case is running a site wide script that should only be initiated when failing over everything.
Based on this requirement I decided to create the Recovery Plan script. Read more of this post
March 18, 2014Posted by on
In order to run Zerto cmdlets inside a script you have to add the snapin. This is easily done with the following command:
March 14, 2014Posted by on
When using Zerto PowerShell cmdlets it can be required to select a checkpoint (a point in time) in the journal of changes from which to perform an operation. The Zerto PowerShell cmdlets which require a checkpoint to be defined are:
A checkpoint is also required for the POST APIs “Performing a Failover of a Specified VPG” and “Test a VPG for Failing Over”. To select a checkpoint the following cmdlet is used:
March 11, 2014Posted by on
To run PowerShell scripts with Zerto I recommend the following requirements be fulfilled, on the host running the scripts, as a best practice to cover running anything and everything:
- PowerShell 3.0 installed (available here)
- Zerto PowerShell Cmdlets 3.1 onwards (available from the Zerto Self-Service Portal here)
- Zerto PowerShell Security configured (see below)
- vSphere PowerCLI 5.5 (available here)
- Remote signed scripts allowed to run by running PowerShell as admin then the below cmd:
- Ignore invalid certificate option set ignore to speed up connect-viserver operations by running PowerShell as admin then the below cmd:
“set-PowerCLIConfiguration -invalidCertificateAction “ignore” -confirm:$false”
March 11, 2014Posted by on
Hi and welcome to my blog. I will be blogging about common queries I often come across in my role as Solutions Engineer for Zerto, as well as cool Zerto features, but I will mainly cover the many different PowerShell scripts I write in my spare time to extend the functionality of Zerto. Some of the scripts I will be releasing as standalone tools. For these I will create a new page dedicated to each tool to go into more detail.
I will say this many times but I can’t stress enough that all scripts on this blog are not supported by Zerto in any shape or form. I am however happy to provide ad-hoc support if you have any questions or issues and I recommend using the comments section on the relevant post to ask.
I might also be tempted to throw in some reviews of the odd Virtualization event and subsequent party. As a Yorkshireman I definitely enjoy a few free drinks!
Don’t worry I didn’t get through all of these :-), but I certainly did try! If you have any spcecific PowerShell scripts you would like me to cover in a blog post feel free to contact me using the form below:
I’m looking forward to sharing some really good content! Thanks,