Testing Risky Postgres Migrations Safely with Volume Cloning on Unikraft Cloud
Database migrations can pass every check in development and still take production down, and the classic example is adding a NOT NULL column with no default to a table that already has rows. It works fine against an empty dev database and fails instantly against real data, which is the one place you cannot afford to find that out. This guide builds a real multi-tenant API backed by PostgreSQL on…
Testing risky PostgreSQL migrations safely with volume cloning on Unikraft Cloud involves several key steps. First, the guide creates a multi-tenant API backed by PostgreSQL on Unikraft Cloud. Next, it clones the live database's persistent volume and runs the exact failure against a real copy. Only after the fix has actually succeeded in a disposable environment is the migration promoted.
This process avoids the risk of failing production databases due to migrations that work in development but fail in live environments. The guide emphasizes the importance of testing migrations against real data before deploying them to production.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
