Add support for AMD SEV-SNP instances

fangge1212 · fangge1212 · commit 934e5707573f · 2025-08-06T10:03:21.000-04:00
This commit adds support for AMD SEV-SNP instances, so users can
utilize confidential computing technology on cluster nodes.

Signed-off-by: Fangge Jin &lt;fjin@redhat.com&gt;
diff --git a/api/v1beta1/awscluster_conversion.go b/api/v1beta1/awscluster_conversion.go
@@ -63,6 +63,7 @@ func (src *AWSCluster) ConvertTo(dstRaw conversion.Hub) error {
 		dst.Status.Bastion.NetworkInterfaceType = restored.Status.Bastion.NetworkInterfaceType
 		dst.Status.Bastion.CapacityReservationID = restored.Status.Bastion.CapacityReservationID
 		dst.Status.Bastion.MarketType = restored.Status.Bastion.MarketType
+		dst.Status.Bastion.CPUOptions = restored.Status.Bastion.CPUOptions
 	}
 	dst.Spec.Partition = restored.Spec.Partition
 
diff --git a/api/v1beta1/awsmachine_conversion.go b/api/v1beta1/awsmachine_conversion.go
@@ -45,6 +45,7 @@ func (src *AWSMachine) ConvertTo(dstRaw conversion.Hub) error {
 	dst.Spec.CapacityReservationID = restored.Spec.CapacityReservationID
 	dst.Spec.MarketType = restored.Spec.MarketType
 	dst.Spec.NetworkInterfaceType = restored.Spec.NetworkInterfaceType
+	dst.Spec.CPUOptions = restored.Spec.CPUOptions
 	if restored.Spec.ElasticIPPool != nil {
 		if dst.Spec.ElasticIPPool == nil {
 			dst.Spec.ElasticIPPool = &infrav1.ElasticIPPool{}
@@ -109,6 +110,7 @@ func (r *AWSMachineTemplate) ConvertTo(dstRaw conversion.Hub) error {
 	dst.Spec.Template.Spec.CapacityReservationID = restored.Spec.Template.Spec.CapacityReservationID
 	dst.Spec.Template.Spec.MarketType = restored.Spec.Template.Spec.MarketType
 	dst.Spec.Template.Spec.NetworkInterfaceType = restored.Spec.Template.Spec.NetworkInterfaceType
+	dst.Spec.Template.Spec.CPUOptions = restored.Spec.Template.Spec.CPUOptions
 	if restored.Spec.Template.Spec.ElasticIPPool != nil {
 		if dst.Spec.Template.Spec.ElasticIPPool == nil {
 			dst.Spec.Template.Spec.ElasticIPPool = &infrav1.ElasticIPPool{}
diff --git a/api/v1beta1/zz_generated.conversion.go b/api/v1beta1/zz_generated.conversion.go
diff --git a/api/v1beta2/awsmachine_types.go b/api/v1beta2/awsmachine_types.go
@@ -73,6 +73,28 @@ const (
 	NetworkInterfaceTypeEFAWithENAInterface NetworkInterfaceType = NetworkInterfaceType("efa")
 )
 
+// ConfidentialComputePolicyAWS represents the confidential compute configuration for the AWS machine.
+type ConfidentialComputePolicyAWS string
+
+const (
+	// ConfidentialComputePolicyAWSDisabled disables confidential compute for the AWS machine.
+	ConfidentialComputePolicyAWSDisabled ConfidentialComputePolicyAWS = "Disabled"
+	// ConfidentialComputePolicyAWSSEVSNP sets AMD SEV-SNP as the VM instance's confidential computing technology of choice.
+	ConfidentialComputePolicyAWSSEVSNP ConfidentialComputePolicyAWS = "AMDSevSnp"
+)
+
+// CPUOptions defines the cpu options for the instance.
+type CPUOptions struct {
+	// ConfidentialCompute specifies whether confidential computing should be enabled for the instance,
+	// and, if so, which confidential computing technology to use.
+	// If set to Disabled, the instance will not use confidential computing.
+	// If set to AMDSevSnp, the instance will be configured with AMD SEV-SNP.
+	// If omitted, the platform will apply a default value — currently Disabled, but this may change over time.
+	// +kubebuilder:validation:Enum=Disabled;AMDSevSnp
+	// +optional
+	ConfidentialCompute ConfidentialComputePolicyAWS `json:"confidentialCompute,omitempty"`
+}
+
 // AWSMachineSpec defines the desired state of an Amazon EC2 instance.
 // +kubebuilder:validation:XValidation:rule="!has(self.capacityReservationId) || !has(self.marketType) || self.marketType != 'Spot'",message="capacityReservationId may not be set when marketType is Spot"
 // +kubebuilder:validation:XValidation:rule="!has(self.capacityReservationId) || !has(self.spotMarketOptions)",message="capacityReservationId cannot be set when spotMarketOptions is specified"
@@ -233,6 +255,10 @@ type AWSMachineSpec struct {
 	// If marketType is not specified and spotMarketOptions is provided, the marketType defaults to "Spot".
 	// +optional
 	MarketType MarketType `json:"marketType,omitempty"`
+
+	// cpuOptions is the set of cpu options for the instance
+	// +optional
+	CPUOptions *CPUOptions `json:"cpuOptions,omitempty"`
 }
 
 // CloudInit defines options related to the bootstrapping systems where
diff --git a/api/v1beta2/types.go b/api/v1beta2/types.go
@@ -273,6 +273,9 @@ type Instance struct {
 	// If marketType is not specified and spotMarketOptions is provided, the marketType defaults to "Spot".
 	// +optional
 	MarketType MarketType `json:"marketType,omitempty"`
+
+	// The cpu options of the instance.
+	CPUOptions *CPUOptions `json:"cpuOptions,omitempty"`
 }
 
 // MarketType describes the market type of an Instance
diff --git a/api/v1beta2/zz_generated.deepcopy.go b/api/v1beta2/zz_generated.deepcopy.go
diff --git a/config/crd/bases/controlplane.cluster.x-k8s.io_awsmanagedcontrolplanes.yaml b/config/crd/bases/controlplane.cluster.x-k8s.io_awsmanagedcontrolplanes.yaml
@@ -1214,6 +1214,21 @@ spec:
                     description: CapacityReservationID specifies the target Capacity
                       Reservation into which the instance should be launched.
                     type: string
+                  cpuOptions:
+                    description: The cpu options of the instance.
+                    properties:
+                      confidentialCompute:
+                        description: |-
+                          ConfidentialCompute specifies whether confidential computing should be enabled for the instance,
+                          and, if so, which confidential computing technology to use.
+                          If set to Disabled, the instance will not use confidential computing.
+                          If set to AMDSevSnp, the instance will be configured with AMD SEV-SNP.
+                          If omitted, the platform will apply a default value — currently Disabled, but this may change over time.
+                        enum:
+                        - Disabled
+                        - AMDSevSnp
+                        type: string
+                    type: object
                   ebsOptimized:
                     description: Indicates whether the instance is optimized for Amazon
                       EBS I/O.
@@ -3395,6 +3410,21 @@ spec:
                     description: CapacityReservationID specifies the target Capacity
                       Reservation into which the instance should be launched.
                     type: string
+                  cpuOptions:
+                    description: The cpu options of the instance.
+                    properties:
+                      confidentialCompute:
+                        description: |-
+                          ConfidentialCompute specifies whether confidential computing should be enabled for the instance,
+                          and, if so, which confidential computing technology to use.
+                          If set to Disabled, the instance will not use confidential computing.
+                          If set to AMDSevSnp, the instance will be configured with AMD SEV-SNP.
+                          If omitted, the platform will apply a default value — currently Disabled, but this may change over time.
+                        enum:
+                        - Disabled
+                        - AMDSevSnp
+                        type: string
+                    type: object
                   ebsOptimized:
                     description: Indicates whether the instance is optimized for Amazon
                       EBS I/O.
diff --git a/config/crd/bases/infrastructure.cluster.x-k8s.io_awsclusters.yaml b/config/crd/bases/infrastructure.cluster.x-k8s.io_awsclusters.yaml
@@ -2197,6 +2197,21 @@ spec:
                     description: CapacityReservationID specifies the target Capacity
                       Reservation into which the instance should be launched.
                     type: string
+                  cpuOptions:
+                    description: The cpu options of the instance.
+                    properties:
+                      confidentialCompute:
+                        description: |-
+                          ConfidentialCompute specifies whether confidential computing should be enabled for the instance,
+                          and, if so, which confidential computing technology to use.
+                          If set to Disabled, the instance will not use confidential computing.
+                          If set to AMDSevSnp, the instance will be configured with AMD SEV-SNP.
+                          If omitted, the platform will apply a default value — currently Disabled, but this may change over time.
+                        enum:
+                        - Disabled
+                        - AMDSevSnp
+                        type: string
+                    type: object
                   ebsOptimized:
                     description: Indicates whether the instance is optimized for Amazon
                       EBS I/O.
diff --git a/config/crd/bases/infrastructure.cluster.x-k8s.io_awsmachines.yaml b/config/crd/bases/infrastructure.cluster.x-k8s.io_awsmachines.yaml
@@ -674,6 +674,21 @@ spec:
                     - ssm-parameter-store
                     type: string
                 type: object
+              cpuOptions:
+                description: cpuOptions is the set of cpu options for the instance
+                properties:
+                  confidentialCompute:
+                    description: |-
+                      ConfidentialCompute specifies whether confidential computing should be enabled for the instance,
+                      and, if so, which confidential computing technology to use.
+                      If set to Disabled, the instance will not use confidential computing.
+                      If set to AMDSevSnp, the instance will be configured with AMD SEV-SNP.
+                      If omitted, the platform will apply a default value — currently Disabled, but this may change over time.
+                    enum:
+                    - Disabled
+                    - AMDSevSnp
+                    type: string
+                type: object
               elasticIpPool:
                 description: ElasticIPPool is the configuration to allocate Public
                   IPv4 address (Elastic IP/EIP) from user-defined pool.
diff --git a/config/crd/bases/infrastructure.cluster.x-k8s.io_awsmachinetemplates.yaml b/config/crd/bases/infrastructure.cluster.x-k8s.io_awsmachinetemplates.yaml
@@ -593,6 +593,22 @@ spec:
                             - ssm-parameter-store
                             type: string
                         type: object
+                      cpuOptions:
+                        description: cpuOptions is the set of cpu options for the
+                          instance
+                        properties:
+                          confidentialCompute:
+                            description: |-
+                              ConfidentialCompute specifies whether confidential computing should be enabled for the instance,
+                              and, if so, which confidential computing technology to use.
+                              If set to Disabled, the instance will not use confidential computing.
+                              If set to AMDSevSnp, the instance will be configured with AMD SEV-SNP.
+                              If omitted, the platform will apply a default value — currently Disabled, but this may change over time.
+                            enum:
+                            - Disabled
+                            - AMDSevSnp
+                            type: string
+                        type: object
                       elasticIpPool:
                         description: ElasticIPPool is the configuration to allocate
                           Public IPv4 address (Elastic IP/EIP) from user-defined pool.
diff --git a/pkg/cloud/services/ec2/instances.go b/pkg/cloud/services/ec2/instances.go
@@ -258,6 +258,8 @@ func (s *Service) CreateInstance(ctx context.Context, scope *scope.MachineScope,
 
 	input.MarketType = scope.AWSMachine.Spec.MarketType
 
+	input.CPUOptions = scope.AWSMachine.Spec.CPUOptions
+
 	s.scope.Debug("Running instance", "machine-role", scope.Role())
 	s.scope.Debug("Running instance with instance metadata options", "metadata options", input.InstanceMetadataOptions)
 	out, err := s.runInstance(scope.Role(), input)
@@ -656,6 +658,7 @@ func (s *Service) runInstance(role string, i *infrav1.Instance) (*infrav1.Instan
 	input.MetadataOptions = getInstanceMetadataOptionsRequest(i.InstanceMetadataOptions)
 	input.PrivateDnsNameOptions = getPrivateDNSNameOptionsRequest(i.PrivateDNSName)
 	input.CapacityReservationSpecification = getCapacityReservationSpecification(i.CapacityReservationID)
+	input.CpuOptions = getInstanceCPUOptionsRequest(i.CPUOptions)
 
 	if i.Tenancy != "" {
 		input.Placement = &types.Placement{
@@ -1251,3 +1254,24 @@ func getPrivateDNSNameOptionsRequest(privateDNSName *infrav1.PrivateDNSName) *ty
 		HostnameType:                    types.HostnameType(aws.ToString(privateDNSName.HostnameType)),
 	}
 }
+
+func getInstanceCPUOptionsRequest(cpuOptions *infrav1.CPUOptions) *types.CpuOptionsRequest {
+	if cpuOptions == nil {
+		return nil
+	}
+
+	request := &types.CpuOptionsRequest{}
+	switch cpuOptions.ConfidentialCompute {
+	case infrav1.ConfidentialComputePolicyAWSSEVSNP:
+		request.AmdSevSnp = types.AmdSevSnpSpecificationEnabled
+	case infrav1.ConfidentialComputePolicyAWSDisabled:
+		request.AmdSevSnp = types.AmdSevSnpSpecificationDisabled
+	default:
+	}
+
+	if *request == (types.CpuOptionsRequest{}) {
+		return nil
+	}
+
+	return request
+}
diff --git a/pkg/cloud/services/ec2/instances_test.go b/pkg/cloud/services/ec2/instances_test.go

Original file line number	Diff line number	Diff line change
`@@ -63,6 +63,7 @@ func (src *AWSCluster) ConvertTo(dstRaw conversion.Hub) error {`
`63`	`63`	`dst.Status.Bastion.NetworkInterfaceType = restored.Status.Bastion.NetworkInterfaceType`
`64`	`64`	`dst.Status.Bastion.CapacityReservationID = restored.Status.Bastion.CapacityReservationID`
`65`	`65`	`dst.Status.Bastion.MarketType = restored.Status.Bastion.MarketType`
	`66`	`+ dst.Status.Bastion.CPUOptions = restored.Status.Bastion.CPUOptions`
`66`	`67`	`}`
`67`	`68`	`dst.Spec.Partition = restored.Spec.Partition`
`68`	`69`
Original file line number	Diff line number	Diff line change
`@@ -273,6 +273,9 @@ type Instance struct {`
`273`	`273`	`// If marketType is not specified and spotMarketOptions is provided, the marketType defaults to "Spot".`
`274`	`274`	`// +optional`
`275`	`275`	MarketType MarketType `json:"marketType,omitempty"`
	`276`	`+`
	`277`	`+ // The cpu options of the instance.`
	`278`	+ CPUOptions *CPUOptions `json:"cpuOptions,omitempty"`
`276`	`279`	`}`
`277`	`280`
`278`	`281`	`// MarketType describes the market type of an Instance`