Inventory the current environment.
Before moving anything, list the services, ports, runtimes, databases, storage paths, cron jobs, SSL certificates, DNS records, monitoring checks and external integrations tied to the server. Most migration failures come from missed dependencies rather than raw compute problems.
Prepare the destination server
- Install required packages, runtime versions and security updates.
- Create users, firewall rules, SSH keys and access controls.
- Configure web servers, databases, queues and background workers.
- Validate disk space, backup location and restore procedure.
Reduce DNS and data risk
Lower DNS TTL before the migration window so traffic can move faster during cutover. For database-backed applications, schedule an initial sync, then perform a short final sync after write activity is paused or redirected. Keep the previous server intact until the new environment is verified under real traffic.
Verify before declaring completion
- Check application health endpoints and key user flows.
- Confirm SSL certificate validity and redirect behavior.
- Inspect logs for permission, connection and runtime errors.
- Monitor CPU, memory, disk I/O, latency and error rate after launch.