[Fiahil]

We're deploying unique kubernetes cluster per client with their own application, database, task runner and, yes, DNS. Unlike your situation, most of it is completely automated ( :) ) on Azure and AWS using terraform, good old bash scripts and a custom go CLI we maintain.

Each client is billed for their own resource usage and we can have version disparities between clusters.

On the downsides, maintenance, upgrades and deployments take more time, but we are thinking about potential solutions for managing a fleet of k8s clusters.

This approach makes a lot of sense for B2B customers, and I would add that it's better to separate everything down to the infrastructure level, rather than stopping at the database schema. I would probably do it again in a similar situation !