Application Migration

Applications depend on more than source code. Runtimes, schedulers, files, databases, APIs, DNS, certificates, secrets, and deployment patterns must move consistently.

When this service is needed

• An application must move to a new server, cloud, or container platform.
• The existing runtime is unsupported or difficult to secure.
• Deployment needs modernising without changing business function.
• Application dependencies are not fully documented.

Scope

• Application discovery, dependency maps, and configuration inventory.
• Runtime and target-platform compatibility assessment.
• Packaging, containerisation, or replatforming where required.
• Secret, certificate, file, integration, and scheduled-job migration.
• Functional, regression, performance, and security validation.
• Cutover, rollback, monitoring, and post-migration hypercare.

Migration stages

1. Discovery: inventory assets, dependencies, owners, and criticality.
2. Design: define the target, migration method, acceptance criteria, and rollback.
3. Rehearsal: test tools, timings, data, and procedures within a controlled scope.
4. Cutover: execute the move through checklists and escalation paths.
5. Validation: prove function, integrity, security, and performance.
6. Stabilisation: monitor outcomes, remediate findings, and retire legacy systems.

Deliverables

• Inventory and dependency map.
• Migration runbook, cutover plan, and rollback plan.
• Test and reconciliation evidence.
• Target-environment documentation and decommission plan.

Intended outcomes

The application runs in the target environment with validated function, integration, deployment, observability, and operational ownership.