optional int32 availableReplicas = 4;

  // Total number of unavailable pods targeted by this deployment. This is the total number of
  // pods that are still required for the deployment to have 100% available capacity. They may
  // either be pods that are running but not yet available or pods that still have not been created.
  // +optional
  optional int32 unavailableReplicas = 5;

* Enforcement of fsGroup; enable ScaleIO multiple-instance volume mapping; default PVC capacity; alignment of PVC, PV, and volume names for dynamic provisioning ([#48999](https://github.com/kubernetes/kubernetes/pull/48999), [@vladimirvivien](https://github.com/vladimirvivien))



# v1.7.4

* Fix CSI volume limits not showing up in node's capacity and allocatable ([#70540](https://github.com/kubernetes/kubernetes/pull/70540), [@gnufied](https://github.com/gnufied))

// Return used metadata byte slices here.
var metaDataPool = sync.Pool{New: func() interface{} { return make([]byte, 0, metaDataReadDefault) }}

// metaDataPoolGet will return a byte slice with capacity at least metaDataReadDefault.
// It will be length 0.
func metaDataPoolGet() []byte {
	return metaDataPool.Get().([]byte)[:0]
}

// metaDataPoolPut will put an unused small buffer back into the pool.

### Storage Capacity and Volume Expansion Are Generally Available

[Storage capacity tracking](https://github.com/kubernetes/enhancements/issues/1472)
supports exposing currently available storage capacity via [CSIStorageCapacity objects](https://kubernetes.io/docs/concepts/storage/storage-capacity/#api)
and enhances scheduling of pods that use CSI volumes with late binding.

* Kubelet will set extended resource capacity to zero after it restarts. If the extended resource is exported by a device plugin, its capacity will change to a valid value after the device plugin re-connects with the Kubelet. If the extended resource is exported by an external component through direct node status capacity patching, the component should repatch the field after kubelet becomes ready again. During the time gap, pods...

* [stable] Support Attach and Detach operations for ReadWriteOnce (RWO) volumes that use iSCSI and Fibre Channel plugins.

* [stable] Expose storage usage metrics

  * The available capacity of a given Persistent Volume (PV) is available by calling the Kubernetes metrics API.

* [stable] Volume plugin metrics

- Add support for Windows Network stats in Containerd ([#105744](https://github.com/kubernetes/kubernetes/pull/105744), [@jsturtevant](https://github.com/jsturtevant)) [SIG Node, Testing and Windows]
- Added show-capacity option to `kubectl top node` to show `Capacity` resource usage ([#102917](https://github.com/kubernetes/kubernetes/pull/102917), [@bysnupy](https://github.com/bysnupy)) [SIG CLI]

    will be enforced on all pods by default. To opt-out set
    `--enforce-node-allocatable=””`
  * Hard Eviction Thresholds will be subtracted from Capacity while calculating
    Node Allocatable. This will result in a reduction of schedulable capacity in
    clusters post upgrade where kubelet hard eviction has been turned on for
    memory. To opt-out set `--experimental-allocatable-ignore-eviction=true`.

* allow restricting subresource access ([#30001](https://github.com/kubernetes/kubernetes/pull/30001), [@deads2k](https://github.com/deads2k))
* Fix PVC.Status.Capacity and AccessModes after binding ([#29982](https://github.com/kubernetes/kubernetes/pull/29982), [@jsafrane](https://github.com/jsafrane))