How to Migrate Your Website to the Cloud Without Downtime
Migrating a live website to cloud infrastructure feels risky — but with the right process, it can be seamless. This guide covers every step from audit to go-live with zero user impact.
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Audit Before You Move
Before touching infrastructure, document everything: server configuration, PHP or Node.js version, installed extensions, cron jobs, email configuration, third-party integrations, and database size.
Build and Validate a Staging Environment
Spin up your cloud environment as a complete staging replica first. Migrate data, configure environment variables, and run your full test suite before touching DNS. Run the staging environment in parallel with production for at least 48 hours.
The Low-TTL DNS Strategy
Reduce your domain's DNS TTL to 300 seconds (5 minutes) at least 24 hours before migration day. This ensures that when you flip DNS to the new cloud IP, the change propagates globally in under 5 minutes.
Database Migration Without Data Loss
Use a read replica on your new cloud environment that stays in sync with production via binary log replication. At cutover time, run a final sync, put the site into maintenance mode for 60–90 seconds, and promote the replica.
Post-Migration Monitoring and Rollback
Keep your old server live for 72 hours post-cutover as a rollback safety net. Monitor error rates, response times, and database connections continuously. Define a rollback threshold before you start.
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