Ignore non-zero cards for free eni calculation and free device

pkg/awsutils/awsutils.go

@@ -141,6 +141,9 @@ type APIs interface {
 	// GetENILimit returns the number of ENIs that can be attached to an instance
 	GetENILimit() int
 
+	// GetNetworkCards returns the network cards the instance has
+	GetNetworkCards() []vpc.NetworkCard
+
 	// GetPrimaryENImac returns the mac address of the primary ENI
 	GetPrimaryENImac() string
 
@@ -153,11 +156,11 @@ type APIs interface {
 	// WaitForENIAndIPsAttached waits until the ENI has been attached and the secondary IPs have been added
 	WaitForENIAndIPsAttached(eni string, wantedSecondaryIPs int) (ENIMetadata, error)
 
-	//SetCNIunmanaged ENI
-	SetCNIUnmanagedENIs(eniID []string) error
+	//SetMultiCardENIs ENI
+	SetMultiCardENIs(eniID []string) error
 
-	//IsCNIUnmanagedENI
-	IsCNIUnmanagedENI(eniID string) bool
+	//IsMultiCardENI
+	IsMultiCardENI(eniID string) bool
 
 	//IsPrimaryENI
 	IsPrimaryENI(eniID string) bool
@@ -703,13 +706,16 @@ func (cache *EC2InstanceMetadataCache) awsGetFreeDeviceNumber() (int, error) {
 	inst := result.Reservations[0].Instances[0]
 	var device [maxENIs]bool
 	for _, eni := range inst.NetworkInterfaces {
-		if aws.Int64Value(eni.Attachment.DeviceIndex) > maxENIs {
-			log.Warnf("The Device Index %d of the attached ENI %s > instance max slot %d",
-				aws.Int64Value(eni.Attachment.DeviceIndex), aws.StringValue(eni.NetworkInterfaceId),
-				maxENIs)
-		} else {
-			log.Debugf("Discovered device number is used: %d", aws.Int64Value(eni.Attachment.DeviceIndex))
-			device[aws.Int64Value(eni.Attachment.DeviceIndex)] = true
+		// We don't support multi-card yet, so only account for network card zero
+		if aws.Int64Value(eni.Attachment.NetworkCardIndex) == 0 {
+			if aws.Int64Value(eni.Attachment.DeviceIndex) > maxENIs {
+				log.Warnf("The Device Index %d of the attached ENI %s > instance max slot %d",
+					aws.Int64Value(eni.Attachment.DeviceIndex), aws.StringValue(eni.NetworkInterfaceId),
+					maxENIs)
+			} else {
+				log.Debugf("Discovered device number is used: %d", aws.Int64Value(eni.Attachment.DeviceIndex))
+				device[aws.Int64Value(eni.Attachment.DeviceIndex)] = true
+			}
 		}
 	}
 
@@ -780,6 +786,7 @@ func (cache *EC2InstanceMetadataCache) attachENI(eniID string) (string, error) {
 		DeviceIndex:        aws.Int64(int64(freeDevice)),
 		InstanceId:         aws.String(cache.instanceID),
 		NetworkInterfaceId: aws.String(eniID),
+		NetworkCardIndex:   aws.Int64(0),
 	}
 	start := time.Now()
 	attachOutput, err := cache.ec2SVC.AttachNetworkInterfaceWithContext(context.Background(), attachInput)
@@ -1447,6 +1454,15 @@ func (cache *EC2InstanceMetadataCache) GetENILimit() int {
 	return eniLimit
 }
 
+// GetNetworkCards returns the network cards the instance has
+func (cache *EC2InstanceMetadataCache) GetNetworkCards() []vpc.NetworkCard {
+	networkCards, err := vpc.GetNetworkCards(cache.instanceType)
+	if err != nil {
+		return nil
+	}
+	return networkCards
+}
+
 // GetInstanceHypervisorFamily returns hypervisor of EC2 instance type
 func (cache *EC2InstanceMetadataCache) GetInstanceHypervisorFamily() string {
 	hypervisor, err := vpc.GetHypervisorType(cache.instanceType)
@@ -1922,16 +1938,16 @@ func (cache *EC2InstanceMetadataCache) getENIsFromPaginatedDescribeNetworkInterf
 	return innerErr
 }
 
-// SetCNIUnmanagedENIs Set unmanaged ENI set
-func (cache *EC2InstanceMetadataCache) SetCNIUnmanagedENIs(eniID []string) error {
+// SetMultiCardENIs Set unmanaged ENI set
+func (cache *EC2InstanceMetadataCache) SetMultiCardENIs(eniID []string) error {
 	if len(eniID) != 0 {
 		cache.cniunmanagedENIs.Set(eniID)
 	}
 	return nil
 }
 
-// IsCNIUnmanagedENI returns if the eni is unmanaged
-func (cache *EC2InstanceMetadataCache) IsCNIUnmanagedENI(eniID string) bool {
+// IsMultiCardENI returns if the eni is unmanaged
+func (cache *EC2InstanceMetadataCache) IsMultiCardENI(eniID string) bool {
 	if len(eniID) != 0 {
 		return cache.cniunmanagedENIs.Has(eniID)
 	}

pkg/awsutils/awsutils_test.go

@@ -252,7 +252,7 @@ func TestAWSGetFreeDeviceNumberNoDevice(t *testing.T) {
 	for i := 0; i < maxENIs; i++ {
 		var deviceNums [maxENIs]int64
 		deviceNums[i] = int64(i)
-		ec2ENI := &ec2.InstanceNetworkInterface{Attachment: &ec2.InstanceNetworkInterfaceAttachment{DeviceIndex: &deviceNums[i]}}
+		ec2ENI := &ec2.InstanceNetworkInterface{Attachment: &ec2.InstanceNetworkInterfaceAttachment{DeviceIndex: &deviceNums[i], NetworkCardIndex: aws.Int64(0)}}
 		ec2ENIs = append(ec2ENIs, ec2ENI)
 	}
 	result := &ec2.DescribeInstancesOutput{
@@ -426,7 +426,7 @@ func TestAllocENINoFreeDevice(t *testing.T) {
 	for i := 0; i < maxENIs; i++ {
 		var deviceNums [maxENIs]int64
 		deviceNums[i] = int64(i)
-		ec2ENI := &ec2.InstanceNetworkInterface{Attachment: &ec2.InstanceNetworkInterfaceAttachment{DeviceIndex: &deviceNums[i]}}
+		ec2ENI := &ec2.InstanceNetworkInterface{Attachment: &ec2.InstanceNetworkInterfaceAttachment{DeviceIndex: &deviceNums[i], NetworkCardIndex: aws.Int64(0)}}
 		ec2ENIs = append(ec2ENIs, ec2ENI)
 	}
 	result := &ec2.DescribeInstancesOutput{

pkg/ipamd/ipamd.go

@@ -198,13 +198,16 @@ type IPAMContext struct {
 	maxENI                    int
 	maxPrefixesPerENI         int
 	unmanagedENI              int
-	warmENITarget             int
-	warmIPTarget              int
-	minimumIPTarget           int
-	warmPrefixTarget          int
-	primaryIP                 map[string]string // primaryIP is a map from ENI ID to primary IP of that ENI
-	lastNodeIPPoolAction      time.Time
-	lastDecreaseIPPool        time.Time
+	numNetworkCards           int
+	multiCardENIs             int //ENIs attached to non-zero cards
+
+	warmENITarget        int
+	warmIPTarget         int
+	minimumIPTarget      int
+	warmPrefixTarget     int
+	primaryIP            map[string]string // primaryIP is a map from ENI ID to primary IP of that ENI
+	lastNodeIPPoolAction time.Time
+	lastDecreaseIPPool   time.Time
 	// reconcileCooldownCache keeps timestamps of the last time an IP address was unassigned from an ENI,
 	// so that we don't reconcile and add it back too quickly if IMDS lags behind reality.
 	reconcileCooldownCache    ReconcileCooldownCache
@@ -346,6 +349,7 @@ func New(k8sClient client.Client) (*IPAMContext, error) {
 	c.enablePodENI = enablePodENI()
 	c.enableManageUntaggedMode = enableManageUntaggedMode()
 	c.enablePodIPAnnotation = enablePodIPAnnotation()
+	c.numNetworkCards = len(c.awsClient.GetNetworkCards())
 
 	err = c.awsClient.FetchInstanceTypeLimits()
 	if err != nil {
@@ -408,7 +412,8 @@ func (c *IPAMContext) nodeInit() error {
 	}
 
 	log.Debugf("DescribeAllENIs success: ENIs: %d, tagged: %d", len(metadataResult.ENIMetadata), len(metadataResult.TagMap))
-	c.awsClient.SetCNIUnmanagedENIs(metadataResult.MultiCardENIIDs)
+	c.awsClient.SetMultiCardENIs(metadataResult.MultiCardENIIDs)
+	c.multiCardENIs = len(metadataResult.MultiCardENIIDs)
 	c.setUnmanagedENIs(metadataResult.TagMap)
 	enis := c.filterUnmanagedENIs(metadataResult.ENIMetadata)
 
@@ -1359,7 +1364,8 @@ func (c *IPAMContext) nodeIPPoolReconcile(ctx context.Context, interval time.Dur
 		efaENIs = metadataResult.EFAENIs
 		eniTagMap = metadataResult.TagMap
 		c.setUnmanagedENIs(metadataResult.TagMap)
-		c.awsClient.SetCNIUnmanagedENIs(metadataResult.MultiCardENIIDs)
+		c.awsClient.SetMultiCardENIs(metadataResult.MultiCardENIIDs)
+		c.multiCardENIs = len(metadataResult.MultiCardENIIDs)
 		attachedENIs = c.filterUnmanagedENIs(metadataResult.ENIMetadata)
 	}
 
@@ -1768,7 +1774,7 @@ func (c *IPAMContext) filterUnmanagedENIs(enis []awsutils.ENIMetadata) []awsutil
 			log.Debugf("Skipping ENI %s: since it is unmanaged", eni.ENIID)
 			numFiltered++
 			continue
-		} else if c.awsClient.IsCNIUnmanagedENI(eni.ENIID) {
+		} else if c.awsClient.IsMultiCardENI(eni.ENIID) {
 			log.Debugf("Skipping ENI %s: since on non-zero network card", eni.ENIID)
 			numFiltered++
 			continue
@@ -2107,6 +2113,10 @@ func (c *IPAMContext) hasRoomForEni() bool {
 	if c.enablePodENI && c.dataStore.GetTrunkENI() == "" {
 		trunkEni = 1
 	}
+	if c.numNetworkCards > 1 {
+		// For multi-card instances, c.unmanagedENI includes all ENIs attached to non-zero network cards. We must exclude these ENIs from the calculation as they cannot be used.
+		return c.dataStore.GetENIs() < (c.maxENI - (c.unmanagedENI - c.multiCardENIs) - trunkEni)
+	}
 	return c.dataStore.GetENIs() < (c.maxENI - c.unmanagedENI - trunkEni)
 }