Deprecate caseless driver name validation and enforce lowercase warnings

- Deprecate IsDNS1123SubdomainCaseless to avoid caseless validation issues.
- Warn when ResourceSlice driver names contain uppercase characters.
- Clarify driver names must be DNS subdomains and use only lowercase letters.
- Update tests, staging code, and OpenAPI spec to reflect the changes.

Kubernetes-commit: b40b67b9cfff1fdd6a1177372bdb545c5d2b6bbb

applyconfigurations/resource/v1/allocateddevicestatus.go

@@ -37,7 +37,7 @@ type AllocatedDeviceStatusApplyConfiguration struct {
 	// needed on a node.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// This name together with the driver name and the device name field
 	// identify which device was allocated (`<driver name>/<pool name>/<device name>`).

applyconfigurations/resource/v1/devicerequestallocationresult.go

@@ -42,7 +42,7 @@ type DeviceRequestAllocationResultApplyConfiguration struct {
 	// needed on a node.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// This name together with the driver name and the device name field
 	// identify which device was allocated (`<driver name>/<pool name>/<device name>`).

applyconfigurations/resource/v1/opaquedeviceconfiguration.go

@@ -35,7 +35,7 @@ type OpaqueDeviceConfigurationApplyConfiguration struct {
 	// to decide whether it needs to validate them.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// Parameters can contain arbitrary data. It is the responsibility of
 	// the driver developer to handle validation and versioning. Typically this

applyconfigurations/resource/v1/resourceslicespec.go

@@ -32,7 +32,8 @@ type ResourceSliceSpecApplyConfiguration struct {
 	// objects with a certain driver name.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver. This field is immutable.
+	// vendor of the driver. It should use only lower case characters.
+	// This field is immutable.
 	Driver *string `json:"driver,omitempty"`
 	// Pool describes the pool that this ResourceSlice belongs to.
 	Pool *ResourcePoolApplyConfiguration `json:"pool,omitempty"`

applyconfigurations/resource/v1beta1/allocateddevicestatus.go

@@ -37,7 +37,7 @@ type AllocatedDeviceStatusApplyConfiguration struct {
 	// needed on a node.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// This name together with the driver name and the device name field
 	// identify which device was allocated (`<driver name>/<pool name>/<device name>`).

applyconfigurations/resource/v1beta1/devicerequestallocationresult.go

@@ -42,7 +42,7 @@ type DeviceRequestAllocationResultApplyConfiguration struct {
 	// needed on a node.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// This name together with the driver name and the device name field
 	// identify which device was allocated (`<driver name>/<pool name>/<device name>`).

applyconfigurations/resource/v1beta1/opaquedeviceconfiguration.go

@@ -35,7 +35,7 @@ type OpaqueDeviceConfigurationApplyConfiguration struct {
 	// to decide whether it needs to validate them.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// Parameters can contain arbitrary data. It is the responsibility of
 	// the driver developer to handle validation and versioning. Typically this

applyconfigurations/resource/v1beta1/resourceslicespec.go

@@ -32,7 +32,8 @@ type ResourceSliceSpecApplyConfiguration struct {
 	// objects with a certain driver name.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver. This field is immutable.
+	// vendor of the driver. It should use only lower case characters.
+	// This field is immutable.
 	Driver *string `json:"driver,omitempty"`
 	// Pool describes the pool that this ResourceSlice belongs to.
 	Pool *ResourcePoolApplyConfiguration `json:"pool,omitempty"`

applyconfigurations/resource/v1beta2/allocateddevicestatus.go

@@ -37,7 +37,7 @@ type AllocatedDeviceStatusApplyConfiguration struct {
 	// needed on a node.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// This name together with the driver name and the device name field
 	// identify which device was allocated (`<driver name>/<pool name>/<device name>`).

applyconfigurations/resource/v1beta2/devicerequestallocationresult.go

@@ -42,7 +42,7 @@ type DeviceRequestAllocationResultApplyConfiguration struct {
 	// needed on a node.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// This name together with the driver name and the device name field
 	// identify which device was allocated (`<driver name>/<pool name>/<device name>`).

applyconfigurations/resource/v1beta2/opaquedeviceconfiguration.go

@@ -35,7 +35,7 @@ type OpaqueDeviceConfigurationApplyConfiguration struct {
 	// to decide whether it needs to validate them.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver.
+	// vendor of the driver. It should use only lower case characters.
 	Driver *string `json:"driver,omitempty"`
 	// Parameters can contain arbitrary data. It is the responsibility of
 	// the driver developer to handle validation and versioning. Typically this

applyconfigurations/resource/v1beta2/resourceslicespec.go

@@ -32,7 +32,8 @@ type ResourceSliceSpecApplyConfiguration struct {
 	// objects with a certain driver name.
 	//
 	// Must be a DNS subdomain and should end with a DNS domain owned by the
-	// vendor of the driver. This field is immutable.
+	// vendor of the driver. It should use only lower case characters.
+	// This field is immutable.
 	Driver *string `json:"driver,omitempty"`
 	// Pool describes the pool that this ResourceSlice belongs to.
 	Pool *ResourcePoolApplyConfiguration `json:"pool,omitempty"`