Practical tools for system, network, security, and operations administrators.

CLD-C0021 · Compute & Instance Selection

Sizing VMs When Moving to Cloud

Plan one cloud size from a machine you already run. Do not migrate it, and do not resize it during the reading.

Updated 25 October 2026 · How-To

This is an original planning guide. It is not a vendor manual, an official standard, or legal advice. Example addresses use documentation ranges. Review every command before you paste it.

What this hour is for

Sizing VMs When Moving to Cloud writes the current CPU, memory, and disk, and one candidate size. You do not move the workload. A price you type is an estimate. Untested stays untested.

Write the account, project, or repository you administer, the name of this change, and the time. A second change waits until this line has been read back.

The browser tool drafts text or reads a paste you already hold. It does not log in, it does not scan, and it does not apply.

192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced.

The change you can finish

Apply nothing while you are writing the note. When the lab window opens, it is one change on the account named in the ticket. Read the draft, then the account, then decide.

Rollback is the previous file, the previous plan, or the lab resource you can delete because it was only a lab.

  1. Write the machine you administer.
  2. Write the current size.
  3. Write one candidate.
  4. Do not migrate and do not resize.
  5. Stop.

Mistakes that outlive the statement

Sizing VMs When Moving to Cloud goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.

Decisions to write down

One decision for Sizing VMs When Moving to Cloud: The machine is yours. Nothing moves. Nothing is resized. The price is an estimate. And one machine is the window.

Checks before you call it done

Confirm this before you call the change done: The current size is written. Nothing was moved. Nothing was resized. The candidate is labelled. And a second person can say the current size. If one of those fails, stop.

# Sizing note. Do not migrate or resize during the reading.

Before you leave the account

Sizing VMs When Moving to Cloud ends when the account in the note is the account in the ticket. If it is not, stop.

The draft stays a draft until a person has read the names in it. A generator does not log in, does not apply, and does not scan.

192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced. It is not a password you keep. 10.0.0.0/16 is a sample prefix, not a network you publish unless you already use it.

prompt-for-this is a reminder that a secret is missing. It is not an access key, a token, or a password you save. An Azure secret draft may contain a sample password. Replace it. Do not file it.

One change is the window. If two things move and the result is wrong, you will not know which one did it.

If the same step fails twice, stop for the day. Restore the copy you took first.

A second person reads the account and the change aloud. If they cannot find them in the ticket, the note is not done.

This page is a planning guide. It is not a vendor manual, not an official standard, not legal advice, and not an audit opinion. You do not apply it against an account you do not administer.

Tools for this guide

These tools run in the browser on this site. They do not log into your machines.

More in this cluster

The pillar for this page, and the next published pages filed with it.