[base-cluster] do we need a backup provider?

[cwrau]

... and what are the requirements?

Off the top of my head I'm thinking of

• PVC-only backups
• custom-command-backups, meaning stuff like pg_dump
• multiple backups in the same namespace
• RWO PVCs

The following backup providers are known to me;

• https://k8up.io/
  • PVC-only backups
  • custom-command-backups, meaning stuff like pg_dump
  • multiple backups in the same namespace
  • RWO PVCs
• https://stash.run/
  • PVC-only backups
  • custom-command-backups, meaning stuff like pg_dump
    • just supports kubedb
  • multiple backups in the same namespace
  • RWO PVCs
  • looooooooots of problems, performance, reliability, webhook death spiral, ...
• https://www.kasten.io/
  • not free
• https://velero.io/
  • PVC-only backups
  • custom-command-backups, meaning stuff like pg_dump
    • at least I can't find any documentation about this?
  • multiple backups in the same namespace
    • looks like it, there are selectors
  • RWO PVCs

[cwrau]

For now we have decided to use velero, as the least non-working solution