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ESXi VM Shrink - How I Does Do?

LIGISTX
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I have an ESXi homelab (system in my sig) and I very much accidentally assigned way to much disc space to some VM's that don't need it. I do have Veeam running on a Windows LTSC VM in case things go south, but I am not even sure where to start. The VM's in question are Ubuntu 18.04.4 LTS and they are running under ESXi 6.5 U2 and are thick provisioned. I am just not sure the best way to go about this at all. I am not even sure where to start.

 

My Veeam backup of one example is 5 GB but I gave the VM 20 GB (its a VM that won't really grow for any appreciable reason on its own, and 10 GB would be PLENTY). Obviously, 10 GB isn't a huge issue, but I have a handful of VM's I could trim down similarly, and ~40 GB is non-trivial. Sure, another SSD for a second datastore is also ~50 bucks which is trivial, but still, homelabs are here for us to learn on, so I figure why not figure out how to do this....

 

Any help would be great!

 

TDLR; Need help shrinking an Ubuntu VM under ESXi that is thick provisioned.

Rig: i7 13700k - - Asus Z790-P Wifi - - RTX 4080 - - 4x16GB 6000MHz - - Samsung 990 Pro 2TB NVMe Boot + Main Programs - - Assorted SATA SSD's for Photo Work - - Corsair RM850x - - Sound BlasterX EA-5 - - Corsair XC8 JTC Edition - - Corsair GPU Full Cover GPU Block - - XT45 X-Flow 420 + UT60 280 rads - - EK XRES RGB PWM - - Fractal Define S2 - - Acer Predator X34 -- Logitech G502 - - Logitech G710+ - - Logitech Z5500 - - LTT Deskpad

 

Headphones/amp/dac: Schiit Lyr 3 - - Fostex TR-X00 - - Sennheiser HD 6xx

 

Homelab/ Media Server: Proxmox VE host - - 512 NVMe Samsung 980 RAID Z1 for VM's/Proxmox boot - - Xeon e5 2660 V4- - Supermicro X10SRF-i - - 128 GB ECC 2133 - - 10x4 TB WD Red RAID Z2 - - Corsair 750D - - Corsair RM650i - - Dell H310 6Gbps SAS HBA - - Intel RES2SC240 SAS Expander - - TreuNAS + many other VM’s

 

iPhone 14 Pro - 2018 MacBook Air

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