Virtual Mayhem — Instant-ish VMs Without the Coffee Break
Virtual Mayhem (But Productive)
“Spin up a quick VM,” they said. Thirty minutes later you’re still watching a progress bar that moves like BGP convergence during a solar eclipse. Let’s fix that with a smarter way to provision VMs that doesn’t chew through storage or your sanity.
Most shops still do full clones from old templates. Cute. Instead, use:
VMware: template + customization spec for rapid, thin-provisioned clones
Hyper‑V: differencing disks (child VHDX) so test/dev VMs launch in seconds
Quick Tip — VMware “Template Turbo”
One-liner to crank out a VM from a template with a customization spec:
New-VM -Name 'Dev-API01' -Template 'Win2022-Base' -Datastore 'NVMe_1' `
-ResourcePool 'Dev' -OSCustomizationSpec 'Win2022-JoinDomain' | Start-VMIt’s faster than waiting for Dave to find the ISO he “definitely put on the NAS.”
What Paid Subscribers Got This Week
Full VMware PowerCLI script: parameterized VM factory (name, count, CPU/RAM, network, notes) using template + OSCustomizationSpec.
Full Hyper‑V script: parent VHDX + differencing-disk workflow that spins up N VMs in ~60 seconds each.
Storage sanity guide: thin‑provisioning without creating a dedupe dumpster fire (VMware & Hyper‑V settings you should actually toggle).
Cleanup helpers: safely remove/merge test VMs/diff disks so your next capacity report doesn’t look like an audit finding.
Mini‑Rant — Abstraction ≠ Magic
Virtualization is great at hiding the mess—until you open Datastore Browser and discover 87 abandoned “clone of clone of final test v2” directories. Use templates. Use specs. Name things like a grown-up.
— JJ – Chief Packet Pusher
theconfigreport.com