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CLD-C0637 · Migrations & Analyzers

CloudFormation to Terraform Migration Guide

CloudFormation to Terraform Migration Guide. Convert one file you already hold, review every name, and do not apply the sketch during the reading.

Updated 25 October 2026 · Migration Guide

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

CloudFormation to Terraform Migration Guide converts a file you already hold. The CloudFormation to Terraform starter is a partial rewrite. Review every resource. Do not import the only state. Do not apply during the reading.

You do not convert a repository you do not own. The browser tool drafts text. It does not apply the result and it does not log in.

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.

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 account, project, or repository, and confirm you administer it.
  2. Save the current file or export before any draft is applied.
  3. Read the draft and delete every line this ticket did not name.
  4. Replace account IDs, images, example.com, and any sample password.
  5. Apply nothing during the reading.
  6. Read the names back and compare them with the ticket.
  7. Stop. The next change is a different page.

Mistakes that outlive the statement

cfn-tf conversion 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 cfn-tf conversion: The source file is one you hold. The rewrite is partial until a person has read it. Secrets are not in the new file. Nothing was applied or enabled. And the destination is the one in the title.

Checks before you call it done

Confirm this before you call the change done: The source is named. The sketch was read. No secret is in the new file. Nothing was applied. Nothing was enabled. And a second person can say what is still unmapped. If one of those fails, stop.

# Partial conversion. Review every name.
# The CloudFormation to Terraform starter is a partial rewrite. Review every resource. Do not import the only state. Do not apply during the reading.
# 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.

Before you leave the account

CloudFormation to Terraform Migration Guide 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.