Kubernetes scaling

Question

If I have a database and a web app that I want to make scalable with kubernetes.
Would it cause that the replicas that the kubernetes does when scaling share a different data in the database?
For example some data exists in one pod and some data in a different pod?
If I have kubernetes scalable web app. How do I make all the scaled web app pods to share the same database? And is it possible to also scale the database while syncing the data between the database pods?

Answer 1

You have to follow statefulsets
https://www.magalix.com/blog/kubernetes-and-database