A practical cloud migration checklist
Security, cost, and observability steps we review before every move.
Moving workloads to the cloud is rarely a lift-and-shift weekend. The teams that do well treat migration as a program: inventory, risk, cost model, security boundaries, and a plan for how engineers will operate the new environment day to day.
This checklist is the distilled version of what we walk through with clients before cutover. It is not cloud-vendor specific—whether you lean on AWS, Azure, GCP, or a mix, the categories stay the same.
Inventory and dependencies
List applications, data stores, batch jobs, integrations, and who owns them. Map dependencies so you do not migrate a service that still relies on a database you forgot in a colo rack. Include DNS, certificates, and third-party callbacks that whitelist IPs.
Classify data: PII, financial records, health information—each class drives controls and region choices. If you cannot classify it, pause until you can; migrating unknown risk does not make it smaller.
Security and identity
Decide how identities will work in the target: SSO, workload identities, secrets rotation, and least-privilege IAM. Replace long-lived keys with short-lived credentials where platforms support it.
Network design should reflect trust zones: public ingress, private subnets for data, and explicit paths between services. Document what must never be exposed to the internet, then verify with automated config checks where possible.
- Encrypt data in transit and at rest; know who manages keys and rotation.
- Enable centralized logging and tamper-evident audit trails for admin actions.
- Run tabletop exercises for credential leaks and region outages before go-live.
Cost and FinOps basics
Tag resources by team, environment, and cost center from day one—retrofitting tags is painful. Set budgets and alerts early; surprises after migration erode confidence in the platform team.
Right-size after you have real metrics, not guesses from spreadsheets. Commit discounts can help steady workloads, but only after usage patterns are understood.
Observability and operations
Parity matters: if you cannot see logs, metrics, and traces in the new environment the way you could on-prem, you will fly blind during cutover. Rehearse failover and rollback with the same dashboards you expect in production.
Define SLOs for critical user journeys and wire alerts to pages people will answer. A beautiful cloud bill does not help if customers hit timeouts no one notices.
Cutover and what comes after
Plan maintenance windows or blue/green traffic shifts with explicit go/no-go criteria. Keep a rollback path until data replication and DNS TTLs are proven.
Post-migration, schedule hardening sprints: delete unused accounts, close security groups, and archive one-off migration scripts so they do not become permanent “temporary” tools.
If you want an outside review of your migration plan—or hands-on help executing it—the Brixol team works alongside yours from discovery through steady state. Start a conversation on our contact page and we will route you to the right inbox.