For Kubernetes you can use Velero. I tried it, but I didn't like it (overly complex for my use case), so I wrote my own tool.

Essentially the strategy for me is fairly straightforward, but it depends on the data you have.

I have mostly 2 types:

• manifests and configuration. This I have all in git (as I am using flux).
• persistent volumes. I use openEBS, but for a low resources cluster I use host volumes only. For these I have written my tool that simply runs as a daemonset with the whole root of the host mounted in RO and the DAC_read_search capability, queries the API for volumes and backs up using restic the whole PV to Backblaze. Incidentally, this is also the same way I do all my other backups, outside K8s (I.e.borg or restic to b2).

I chose b2 mostly for the price, but any s3 will do. Since all I am uploading there is encrypted anyway, I don't need to worry about the privacy implication of having a third party potentially having access to my data.