CSI support for Kubernetes v1.12.x

[mattkelly]

The way CSIs are registered/operate has fundamentally changed in Kubernetes v1.12.x. This means that the existing images and manifests no longer work:

Events:
  Type     Reason                  Age               From                                              Message
  ----     ------                  ----              ----                                              -------
  Normal   Scheduled               27s               default-scheduler                                 Successfully assigned default/nginx-csi-hostpath to cs-3f10d2ba-bec9-4f75-92fc-bdd571e26633
  Normal   SuccessfulAttachVolume  27s               attachdetach-controller                           AttachVolume.Attach succeeded for volume "kubernetes-dynamic-pv-34d8871adbc411e8"
  Warning  FailedMount             3s (x6 over 19s)  kubelet, cs-3f10d2ba-bec9-4f75-92fc-bdd571e26633  MountVolume.MountDevice failed for volume "kubernetes-dynamic-pv-34d8871adbc411e8" : driver name csi-hostpath not found in the list of registered CSI drivers

You can easily reproduce this by following the steps listed here.

Other CSIs broke in the same way. For example, you can reference the similar DigitalOcean issue that was recently fixed (though the issue itself is not closed yet).

[andyzhangx]

@mattkelly thanks for pointing out, I will fix it.

[mattkelly]

Thanks @andyzhangx! Any chance you can provide a rough ETA for a new image being pushed?

[andyzhangx]

@mattkelly It's not related to the csi-hostpath image, I have followed exactly as https://kubernetes-csi.github.io/docs/Example.html, and it works. There is really big change in v1.12.x, by default, CSI is even not enabled. Anyway, the csi-hostpath works now. And thanks for pointing out, my next major work would write azure disk & azure file csi drivers, make it work on v1.12.x

[andyzhangx]

close this issue since I have already implemented following csi drivers which supports k8s v1.12:
https://github.com/Azure/kubernetes-volume-drivers/tree/master/csi/azuredisk
https://github.com/Azure/kubernetes-volume-drivers/tree/master/csi/azurefile

[andyzhangx]

share you the new azure CSI drivers, it's under kubernetes-sig now:
https://github.com/kubernetes-sigs/azuredisk-csi-driver
https://github.com/kubernetes-sigs/azurefile-csi-driver

You could run those drivers on k8s v1.13.x