Quota and resizing support on openebs-hostpath volumes (local pv hostpath)

[asoltesz]

Description

The openebs-hostpath storage class would be even more useful if it provided enforcement of the requested PV size (and resizing when it becomes necessary).

Context

I am using a containerized PostgreSQL database with openebs-hostpath for fast local disk access.

WAL archiving is active on the PostgreSQL instance, and I use pgBackrest to push the WAL archive files to S3. Normally, these files are created continuously (since my db has regular write traffic) but also moved relative quickly to remote S3 thus the local disk usage stays low.

However, if the connection to the S3 bucket breaks down, my data partition may be filled up with WAL files and eating up all storage space. (even that which was reserved for other applications/pods.).

If the PV size could be enforced, only the database would be forced to stop when it runs out of WAL space, all other pods that don't use the database could operate without interruption.

[github-actions]

Issues go stale after 90d of inactivity.

[kmova]

This is being tracked at openebs/dynamic-localpv-provisioner#13