Nobody broke the law lol.

I believe they have like a month to comply.

The just asked for a ticket in the app, to make their lifes easier. If OP doesn’t want to, they still have to comply though.

Now I remember why I hate working directly with customers.

They were very friendly imo. No need to speak legalese or to be rude.

Just tell them that you can’t or don’t want to install the app.

If they don’t help you, then you proceed to remind them that you are not required to install anything for them to comply with GDPR.

Kubernetes is useful if you have gone full cattle over pets. And that is very uncommon in home setups. If you only own one or two small machines you cannot destroy infra easily in a “cattle” way, and the bloatware that comes with Kubernetes doesn’t help you neither.

In homelabs and home servers the pros of Kubernetes are not very useful: high availability, auto-scaling, gitops integrations, etc: Why would you need autoscaling and HA for a SFTP used only by you? Instead you write a docker-compose.yml and call it a day.