Cloud Migration for Growing Businesses: A Practical Checklist

Cloud migration is sold as a cost saving and frequently is not one. Lifting an application onto a rented server without changing anything else typically costs more per month than the hardware it replaced. The savings come from what the cloud lets you stop doing, and that requires changing how you deploy and operate, not just where the code runs.

Start with the database, not the application

The riskiest thing you own is the database, and it is where managed services deliver the most obvious value: automated backups, point-in-time recovery, patching and failover. Moving to a managed database first removes your largest single point of failure and is reversible if you dislike it. Restoring a corrupted database at three in the morning is not a skill worth developing in-house.

Containerise before you migrate

Package the application in a container while it is still running where you understand it. You will find the undocumented dependencies, the hardcoded paths and the manual server tweaks nobody wrote down, and you will find them at your own pace rather than during a cutover window.

"A migration that lands on a platform nobody on the team can debug has not reduced risk. It has moved it somewhere less familiar."

Move static assets and email out early

User uploads on a local disk are the classic blocker: they prevent you from running more than one server, and they are the thing that breaks quietly when you finally do. Move them to object storage with a CDN in front. Do the same for outbound email through a dedicated provider, which improves deliverability regardless of where the app runs.

The bills that surprise people

Compute is predictable. What catches teams out is data transfer out of the provider, cross-region traffic, storage snapshots that accumulate for years, and idle resources nobody switched off after a test. Set a billing alert on day one and review the itemised bill monthly for the first quarter, because it is far easier to fix a pattern early than to unpick a year of it.

Know how to go back

Before cutover, write down the rollback: how DNS reverts, how the old system regains the authoritative database, and how long the window is. Migrations that go wrong go wrong at the worst possible time, and the difference between an incident and a disaster is having decided in advance.