Script to take hosts out of maintenance mode in Center & vROPs

On occasion, I’ve noticed that people can sometimes forget to take a host out of maintenance mode in vROPs after completing some work in vCenter. I have created a short PowerCLI script that will pull a list of hosts from a specified CSV file, connect to your vCenter & vROPs then exit the listed hosts

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Exiting Maintenance Mode “end of header not found”

While running through a large vSAN cluster upgrade project recently i ran into the occasional issue where hosts would fail to exit maintenance mode following an upgrade from ESXi 6.7U3 to 7.0. The error seen was “A general system error occurred: end of header not found” This is caused by unused entries in the hostd

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Upgrade your VCSA from 6.7U3 to 7 – Part 2

This is part 2 of my “Upgrade your VCSA” instructions, to see part 1 click HERE 1.Click “Continue” to move onto the next stage 2. Stage 2 show now be highlighted, click Next 3. Select what data you need to migrate and upgrade. Copying performance metrics etc is optional. 4. Confirm all the details are

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Upgrade your VCSA from 6.7U3 to 7 – Part 1

There’s no shortage of posts out there explaining how to upgrade your vCenter but seeing as I was upgrading from 6.7U3 to the recently launched 7, I thought I would run through the steps with you all. Note: Before you start the upgrade, please ensure you have done your due diligence and checked the VMware

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PowerCLI Menu

For some time now I’ve wanted to put together a PowerCLI menu system, just to make running common commands a little faster. Let’s start with vCenter, unfortunately, this is the only part that hardcoded so you’re going to need to amend this to include your vCenters FQDN ###############################File Location ############################### $scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path

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Memory Contention & Unswap

In a proof of concept environment i am currently working in we have an issue with significant over-commitment of resource. Memory is currently around 3:1. Because of this we are seeing workloads often hitting 100% with demand significantly higher: During these periods, we can see VMs were seeing significant memory contention % sometimes exceeding 80%.

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