Migration & Modernization

A cloud migration readiness checklist for teams leaving legacy hosting

A practical checklist covering dependencies, security, data, landing zones, testing, cutover, rollback, and operations before an AWS or GCP migration.

ARCO Editorial TeamCloud ModernizationMay 4, 20266 min read Back to insights

Moving workloads into AWS or GCP is rarely just a lift-and-shift decision. Teams that migrate successfully are usually the ones that understand their dependencies, operating assumptions, deployment model, and target-state architecture before they begin.

01 · Analysis

Start with dependency clarity

Before migration, teams need to understand what systems depend on each other, how traffic flows, and what cannot tolerate interruption.

02 · Analysis

Define target architecture intentionally

Migration works better when there is a clear view of the desired future platform, not just a destination account or cluster.

03 · Analysis

Plan rollout and rollback together

Every migration plan should include both forward progress and rollback thinking to reduce operational risk.

04 · Analysis

Do not postpone observability

Production visibility should be part of the migration, not something added after cutover.

Practical checkpoint

Before acting, confirm the owner, evidence, production risk, expected outcome, and validation method for each recommendation.

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Related engineering guidance

Closely related analysis first, followed by adjacent cloud operating topics.

From analysis to implementation

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