* Fix mounting of UNIX sockets(and other special files) in subpaths ([#61480](https://github.com/kubernetes/kubernetes/pull/61480), [@gnufied](https://github.com/gnufied))
* Fix GCE etcd scripts to pass in all required parameters for the etcd migration utility to correctly perform HA upgrades and downgrades ([#61957](https://github.com/kubernetes/kubernetes/pull/61957), [@jpbetz](https://github.com/jpbetz))

- k8s-dns-node-cache image has been updated to v1.15.1 ([#76640](https://github.com/kubernetes/kubernetes/pull/76640), [@george-angel](https://github.com/george-angel))

### Unchanged

- github.com/yuin/goldmark: [v1.4.0 → v1.4.1](https://github.com/yuin/goldmark/compare/v1.4.0...v1.4.1)
- go.etcd.io/etcd/api/v3: v3.5.0 → v3.5.1
- go.etcd.io/etcd/client/pkg/v3: v3.5.0 → v3.5.1
- go.etcd.io/etcd/client/v3: v3.5.0 → v3.5.1
- golang.org/x/crypto: 32db794 → 8634188
- golang.org/x/mod: v0.4.2 → 9b9b3d8
- golang.org/x/net: e898025 → cd36cc0

- Kubeadm: during execution of the "check expiration" command, treat the etcd CA as external if there is a missing etcd CA key file (etcd/ca.key) and perform the proper validation on certificates signed by the etcd CA. Additionally, make sure that the CA for all entries in the output table is included - for both certificates on disk and in kubeconfig files. ([#106924](https://github.com/kube...

		}
		h.ServeHTTP(w, r)
	})
}

// setBucketForwardingMiddleware middleware forwards the path style requests
// on a bucket to the right bucket location, bucket to IP configuration
// is obtained from centralized etcd configuration service.
func setBucketForwardingMiddleware(h http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

	if iamOS, ok := store.IAMStorageAPI.(*IAMObjectStore); ok {
		err := iamOS.loadAllFromObjStore(ctx, newCache, firstTime)
		if err != nil {
			return err
		}
	} else {
		// Only non-object IAM store (i.e. only etcd backend).
		bootstrapTraceMsgFirstTime("loading policy documents")
		if err := store.loadPolicyDocs(ctx, newCache.iamPolicyDocsMap); err != nil {
			return err
		}

		// Sets default canned policies, if none are set.

}

// StorageClass describes the parameters for a class of storage for
// which PersistentVolumes can be dynamically provisioned.
//
// StorageClasses are non-namespaced; the name of the storage class
// according to etcd is in ObjectMeta.Name.
message StorageClass {
  // Standard object's metadata.
  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
  // +optional

pkg syscall (linux-arm-cgo), func Futimes(int, []Timeval) error
pkg syscall (linux-arm-cgo), func Futimesat(int, string, []Timeval) error
pkg syscall (linux-arm-cgo), func Getcwd([]uint8) (int, error)
pkg syscall (linux-arm-cgo), func Getdents(int, []uint8) (int, error)
pkg syscall (linux-arm-cgo), func Getpeername(int) (Sockaddr, error)
pkg syscall (linux-arm-cgo), func Getpgid(int) (int, error)

* Etcd health checks by the apiserver now ensure the apiserver can connect to and exercise the etcd API ([#65027](https://github.com/kubernetes/kubernetes/pull/65027), [@liggitt](https://github.com/liggitt))

}

// StorageClass describes the parameters for a class of storage for
// which PersistentVolumes can be dynamically provisioned.
//
// StorageClasses are non-namespaced; the name of the storage class
// according to etcd is in ObjectMeta.Name.
message StorageClass {
  // Standard object's metadata.
  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
  // +optional