// +optional
  optional string fsType = 3;

  // pool is the rados pool name.
  // Default is rbd.
  // More info: https://examples.k8s.io/volumes/rbd/README.md#how-to-use-it
  // +optional
  optional string pool = 4;

  // user is the rados user name.
  // Default is admin.

- Fix a bug that Pods could stuck in the unschedulable pod pool 
  if they're rejected by PreEnqueue plugins that could change its result by a change in resources apart from Pods.
  
  DRA plugin is the only plugin that meets the criteria of the bug in in-tree, 

## Changelog since v1.23.12

## Changes by Kind

### Bug or Regression

- Azure: Skip "instance not found" error for LB backend address pools ([#111428](https://github.com/kubernetes/kubernetes/pull/111428), [@lzhecheng](https://github.com/lzhecheng)) [SIG Cloud Provider]

- Fix make azure disk URI as case insensitive ([#79020](https://github.com/kubernetes/kubernetes/pull/79020), [@andyzhangx](https://github.com/andyzhangx))
- Fix VMSS LoadBalancer backend pools so that the network won't be broken when instances are upgraded to latest model ([#81411](https://github.com/kubernetes/kubernetes/pull/81411), [@nilo19](https://github.com/nilo19))

* kube-up.sh no longer supports "centos" and "local" providers ([#76711](https://github.com/kubernetes/kubernetes/pull/76711), [@dims](https://github.com/dims))
* Ensure the backend pools are set correctly for Azure SLB with multiple backend pools (e.g. outbound rules) ([#76691](https://github.com/kubernetes/kubernetes/pull/76691), [@feiskyer](https://github.com/feiskyer))

- The scheduling queue didn't notice any extenders' failures, it could miss some cluster events,
  and it could end up Pods rejected by Extenders stuck in unschedulable pod pool in 5min in the worst-case scenario.

  * Marking a StorageClass as default makes it so that even a PersistentVolumeClaim without a StorageClass specified will trigger dynamic provisioning (instead of binding to an existing pool of PVs).
  * If you depend on the old behavior of volumes binding to existing pool of PersistentVolume objects then modify the StorageClass object and set `storageclass.beta.kubernetes.io/is-default-class` to `false`.

* Ensure the backend pools are set correctly for Azure SLB with multiple backend pools (e.g. outbound rules) ([#76691](https://github.com/kubernetes/kubernetes/pull/76691), [@feiskyer](https://github.com/feiskyer))

# Changelog since v1.18.6

## Changes by Kind

### Bug or Regression

- Do not add nodes labeled with kubernetes.azure.com/managed=false to backend pool of load balancer. ([#93034](https://github.com/kubernetes/kubernetes/pull/93034), [@matthias50](https://github.com/matthias50)) [SIG Cloud Provider]

- Fix a bug that Pods could stuck in the unschedulable pod pool 
  if they're rejected by PreEnqueue plugins that could change its result by a change in resources apart from Pods.
  
  DRA plugin is the only plugin that meets the criteria of the bug in in-tree,