tree c64a64a622ec1c3e1e72fc12a6d4252c0e803cc1
parent 2999427c182463840a339cf0e82885d8a3b6e79f
author Lorenz Brun <lorenz@nexantic.com> 1617105627 +0200
committer Leopold Schabel <leo@nexantic.com> 1618304641 +0200

Implement Block PVCs in our storage backend

This implements full support for Block PVCs in our Kubernetes storage backend.
The block PVCs are backed by files made available to the pods using loop devices and
have read-only and online expansion support.

This also requires a Kubernetes patch because they call losetup if block PVCs are used
with CSI to establish a form of lock on the backing block device. This lock is not
exclusive and does absolutely nothing for our use case and could get very expensive
on dense machines so I removed it.

Test Plan: Comes with E2E tests

X-Origin-Diff: phab/D746
GitOrigin-RevId: 430d3f445286c0d3498b2153df333a19f3fcab89