rebase: update kubernetes to v1.20.0

updated kubernetes packages to latest
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/cloud-provider/cloud.go

@@ -49,7 +49,14 @@ type Interface interface {
 	LoadBalancer() (LoadBalancer, bool)
 	// Instances returns an instances interface. Also returns true if the interface is supported, false otherwise.
 	Instances() (Instances, bool)
+	// InstancesV2 is an implementation for instances and should only be implemented by external cloud providers.
+	// Implementing InstancesV2 is behaviorally identical to Instances but is optimized to significantly reduce
+	// API calls to the cloud provider when registering and syncing nodes. Implementation of this interface will
+	// disable calls to the Zones interface. Also returns true if the interface is supported, false otherwise.
+	InstancesV2() (InstancesV2, bool)
 	// Zones returns a zones interface. Also returns true if the interface is supported, false otherwise.
+	// DEPRECATED: Zones is deprecated in favor of retrieving zone/region information from InstancesV2.
+	// This interface will not be called if InstancesV2 is enabled.
 	Zones() (Zones, bool)
 	// Clusters returns a clusters interface.  Also returns true if the interface is supported, false otherwise.
 	Clusters() (Clusters, bool)
@@ -157,9 +164,6 @@ type LoadBalancer interface {
 // Instances is an abstract, pluggable interface for sets of instances.
 type Instances interface {
 	// NodeAddresses returns the addresses of the specified instance.
-	// TODO(roberthbailey): This currently is only used in such a way that it
-	// returns the address of the calling instance. We should do a rename to
-	// make this clearer.
 	NodeAddresses(ctx context.Context, name types.NodeName) ([]v1.NodeAddress, error)
 	// NodeAddressesByProviderID returns the addresses of the specified instance.
 	// The instance is specified using the providerID of the node. The
@@ -189,6 +193,24 @@ type Instances interface {
 	InstanceShutdownByProviderID(ctx context.Context, providerID string) (bool, error)
 }
 
+// InstancesV2 is an abstract, pluggable interface for cloud provider instances.
+// Unlike the Instances interface, it is designed for external cloud providers and should only be used by them.
+// Implementation of this interface will disable calls to the Zones interface.
+type InstancesV2 interface {
+	// InstanceExists returns true if the instance for the given node exists according to the cloud provider.
+	// Use the node.name or node.spec.providerID field to find the node in the cloud provider.
+	InstanceExists(ctx context.Context, node *v1.Node) (bool, error)
+	// InstanceShutdown returns true if the instance is shutdown according to the cloud provider.
+	// Use the node.name or node.spec.providerID field to find the node in the cloud provider.
+	InstanceShutdown(ctx context.Context, node *v1.Node) (bool, error)
+	// InstanceMetadata returns the instance's metadata. The values returned in InstanceMetadata are
+	// translated into specific fields and labels in the Node object on registration.
+	// Implementations should always check node.spec.providerID first when trying to discover the instance
+	// for a given node. In cases where node.spec.providerID is empty, implementations can use other
+	// properties of the node like its name, labels and annotations.
+	InstanceMetadata(ctx context.Context, node *v1.Node) (*InstanceMetadata, error)
+}
+
 // Route is a representation of an advanced routing rule.
 type Route struct {
 	// Name is the name of the routing rule in the cloud-provider.
@@ -231,6 +253,8 @@ type Zone struct {
 }
 
 // Zones is an abstract, pluggable interface for zone enumeration.
+// DEPRECATED: Zones is deprecated in favor of retrieving zone/region information from InstancesV2.
+// This interface will not be called if InstancesV2 is enabled.
 type Zones interface {
 	// GetZone returns the Zone containing the current failure zone and locality region that the program is running in
 	// In most cases, this method is called from the kubelet querying a local metadata service to acquire its zone.
@@ -253,3 +277,37 @@ type Zones interface {
 type PVLabeler interface {
 	GetLabelsForVolume(ctx context.Context, pv *v1.PersistentVolume) (map[string]string, error)
 }
+
+// InstanceMetadata contains metadata about a specific instance.
+// Values returned in InstanceMetadata are translated into specific fields and labels for Node.
+type InstanceMetadata struct {
+	// ProviderID is a unique ID used to idenfitify an instance on the cloud provider.
+	// The ProviderID set here will be set on the node's spec.providerID field.
+	// The provider ID format can be set by the cloud provider but providers should
+	// ensure the format does not change in any incompatible way.
+	//
+	// The provider ID format used by existing cloud provider has been:
+	//    <provider-name>://<instance-id>
+	// Existing providers setting this field should preserve the existing format
+	// currently being set in node.spec.providerID.
+	ProviderID string
+	// InstanceType is the instance's type.
+	// The InstanceType set here will be set using the following labels on the node object:
+	//   * node.kubernetes.io/instance-type=<instance-type>
+	//   * beta.kubernetes.io/instance-type=<instance-type> (DEPRECATED)
+	InstanceType string
+	// NodeAddress contains information for the instance's address.
+	// The node addresses returned here will be set on the node's status.addresses field.
+	NodeAddresses []v1.NodeAddress
+
+	// Zone is the zone that the instance is in.
+	// The value set here is applied as the following labels on the node:
+	//   * topology.kubernetes.io/zone=<zone>
+	//   * failure-domain.beta.kubernetes.io/zone=<zone> (DEPRECATED)
+	Zone string
+	// Region is the region that the instance is in.
+	// The value set here is applied as the following labels on the node:
+	//   * topology.kubernetes.io/region=<region>
+	//   * failure-domain.beta.kubernetes.io/region=<region> (DEPRECATED)
+	Region string
+}