* <a href="https://fastapi.tiangolo.com/tutorial/bigger-applications/" class="external-link" target="_blank">Tutorial - Bigger Applications</a>.

- [`KT-53460`](https://youtrack.jetbrains.com/issue/KT-53460) False positive smartcast warning in if block after if block
- [`KT-40851`](https://youtrack.jetbrains.com/issue/KT-40851) False MUST_BE_INITIALIZED_OR_BE_ABSTRACT error for a property which is initialised in the init block
- [`KT-59695`](https://youtrack.jetbrains.com/issue/KT-59695) K2: false negative NON_PUBLIC_CALL_FROM_PUBLIC_INLINE

No identifier may be declared twice in the same block, and
no identifier may be declared in both the file and package block.
</p>

<p>
The <a href="#Blank_identifier">blank identifier</a> may be used like any other identifier
in a declaration, but it does not introduce a binding and thus is not declared.
In the package block, the identifier <code>init</code> may only be used for

### OpenStack

In this cycle, SIG OpenStack focused on configuration simplification through smarter defaults and the use of auto-detection wherever feasible (Block Storage API versions, Security Groups) as well as updating API support, including:

*   Block Storage (Cinder) V3 is now supported.
*   Load Balancer (Octavia) V2 is now supported, in addition to Neutron LBaaS V2.
*   Neutron LBaas V1 support has been removed.

- The job controller back-off logic is now decoupled from workqueue. In case of parallelism > 1, if there are multiple new failures in a reconciliation cycle, all the failures are taken into account to compute the back-off. Previously, the back-off kicked in for all types of failures; with this change, only pod failures are taken into account. If the back-off limits exceeds, the job is marked as failed immediately; before this change, the...

* Added block volume support to Cinder volume plugin. ([#64879](https://github.com/kubernetes/kubernetes/pull/64879), [@bertinatto](https://github.com/bertinatto))
* Provided API support for external CSI storage drivers to support block volumes. ([#64723](https://github.com/kubernetes/kubernetes/pull/64723), [@vladimirvivien](https://github.com/vladimirvivien))

stability and performance improvements in the 1.13 release.  A new alpha feature is introduced to improve the mechanism that nodes heartbeat back to the control plane.  The `NodeLease` feature results in the node using a `Lease` resource in the `kube-node-lease` namespace that is renewed periodically.  The `NodeStatus` that was used previously to heartbeat back to the control plane is only updated when it changes.  This reduces load on the control plane for large clusters. The Kubelet plugin registration...

- For raw block CSI volumes on Kubernetes, kubelet was incorrectly calling CSI `NodeStageVolume` for every single "map" (i.e. raw block "mount") operation for a volume already attached to the node. This change modified that behavior to ensure it is only called once per volume per node. ([#112403](https://github.com/kubern...

- local: support local filesystem volume with block resource reconstruction ([#84218](https://github.com/kubernetes/kubernetes/pull/84218), [@cofyc](https://github.com/cofyc))

message LocalVolumeSource {
  // path of the full path to the volume on the node.
  // It can be either a directory or block device (disk, partition, ...).
  optional string path = 1;

  // fsType is the filesystem type to mount.
  // It applies only when the Path is a block device.
  // Must be a filesystem type supported by the host operating system.