My persistent volumes are in a ZFS dataset, and I use Sanoid to periodically snapshot the dataset and Syncoid to transfer these snapshots to my backup host.

Kubernetes is just docker-compose with extra steps.

/s

You can try using MotionEyeOS. It's a purpose-built OS with a nice interface around Motion. In your case, you can set it to "Fast network camera" mode (disables motion detection) and enable the RTSP stream. One nice thing about this OS is that it's quite resilient to power going down, so it's safer to deploy in "computer-hostile" environments.