- Apiserver adds two new metrics `etcd_requests_total` and `etcd_request_errors_total` that allow users to monitor requests to etcd storage, split by operation and resource type. ([#117222](https://github.com/kubernetes/kubernetes/pull/117222), [@iyear](https://github.com/iyear)) [SIG API Machinery]

- Reduce event spam during a volume operation error. ([#89796](https://github.com/kubernetes/kubernetes/pull/89796), [@msau42](https://github.com/msau42)) [SIG Storage]


# v1.18.0

[Documentation](https://docs.k8s.io)

## Downloads for v1.18.0

- 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/kubernetes/kubernetes/pull/112403), [@akankshakumari393](https://github.com/akankshakumari393))...

fills b with cryptographically secure random bytes. In FIPS mode, it // uses an SP 800-90A Rev. 1 Deterministic Random Bit Generator (DRBG). // Otherwise, it uses the operating system's random number generator. func Read(b []byte) { if !fips140.Enabled { sysrand.Read(b) return } // At every read, 128 random bits from the operating system are mixed as // additional input, to make the output as strong as non-FIPS randomness. // This is not credited as entropy for FIPS purposes, as allowed by Section...

- The `WarningHeader` feature is now GA and is unconditionally enabled. The `apiserver_requested_deprecated_apis` metric has graduated to stable status. The `WarningHeader` feature-gate is no longer operative and will be removed in v1.24. ([#100754](https://github.com/kubernetes/kubernetes/pull/100754), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Instrumentation and Testing]

- Kubeadm: Add retries for kubeadm join / UpdateStatus to make update status more resilient by adding a retry loop to this operation ([#91952](https://github.com/kubernetes/kubernetes/pull/91952), [@xlgao-zju](https://github.com/xlgao-zju)) [SIG Cluster Lifecycle]

    or force deletion of the pod from the api-server).
    This helps prevent "split brain" scenarios in clustered applications by
    ensuring that unreachable pods will not be presumed dead unless some
    "fencing" operation has provided one of the above indications.
  * For all other existing controllers except StatefulSet, this has no effect on
    the ability of the controller to replace pods because the controllers do not

- 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 PR ensures it is only called once per volume per node. ([#112403](https://github.com/kubernetes/kubernetes/pull/112403), [@akankshakumari393](https://github.com/akankshakumari393)) [SIG Storage]

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexReindexSize();

    /**
     * Get the value for the key 'index.reindex.size' as {@link Integer}. <br>
     * The value is, e.g. 100 <br>
     * comment: Number of documents to process per reindex operation.

- Graduated the `CSINodeExpandSecret` feature to Beta. This feature facilitates passing secrets to CSI driver as part of Node Expansion CSI operation. ([#115621](https://github.com/kubernetes/kubernetes/pull/115621), [@humblec](https://github.com/humblec))