eni

package
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 Go to latest Published: Apr 11, 2024 License: Apache-2.0 Imports: 31 Imported by: 5

Documentation

Overview

Package eni implements AWS ENI allocation logic

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func StartENIGarbageCollector 

func StartENIGarbageCollector(ctx context.Context, api EC2API, params GarbageCollectionParams)

Types

type EC2API 

type EC2API interface {
	GetInstance(ctx context.Context, vpcs ipamTypes.VirtualNetworkMap, subnets ipamTypes.SubnetMap, instanceID string) (*ipamTypes.Instance, error)
	GetInstances(ctx context.Context, vpcs ipamTypes.VirtualNetworkMap, subnets ipamTypes.SubnetMap) (*ipamTypes.InstanceMap, error)
	GetSubnets(ctx context.Context) (ipamTypes.SubnetMap, error)
	GetVpcs(ctx context.Context) (ipamTypes.VirtualNetworkMap, error)
	GetSecurityGroups(ctx context.Context) (types.SecurityGroupMap, error)
	GetDetachedNetworkInterfaces(ctx context.Context, tags ipamTypes.Tags, maxResults int32) ([]string, error)
	CreateNetworkInterface(ctx context.Context, toAllocate int32, subnetID, desc string, groups []string, allocatePrefixes bool) (string, *eniTypes.ENI, error)
	AttachNetworkInterface(ctx context.Context, index int32, instanceID, eniID string) (string, error)
	DeleteNetworkInterface(ctx context.Context, eniID string) error
	ModifyNetworkInterface(ctx context.Context, eniID, attachmentID string, deleteOnTermination bool) error
	AssignPrivateIpAddresses(ctx context.Context, eniID string, addresses int32) error
	UnassignPrivateIpAddresses(ctx context.Context, eniID string, addresses []string) error
	AssignENIPrefixes(ctx context.Context, eniID string, prefixes int32) error
	UnassignENIPrefixes(ctx context.Context, eniID string, prefixes []string) error
}

EC2API is the API surface used of the EC2 API

type GarbageCollectionParams 

type GarbageCollectionParams struct {
	// RunInterval is both the GC interval and also the minimum amount of time
	// an ENI has to be available before it is garbage collected
	RunInterval time.Duration
	// MaxPerInterval is the maximum number of ENIs which are deleted in a
	// single interval
	MaxPerInterval int32
	// ENITags is used to only garbage collect ENIs with this set of tags
	ENITags types.Tags
}

type InstancesManager 

type InstancesManager struct {
	// contains filtered or unexported fields
}

InstancesManager maintains the list of instances. It must be kept up to date by calling resync() regularly.

func NewInstancesManager 

func NewInstancesManager(api EC2API) *InstancesManager

NewInstancesManager returns a new instances manager

func (*InstancesManager) CreateNode 

func (m *InstancesManager) CreateNode(obj *v2.CiliumNode, n *ipam.Node) ipam.NodeOperations

CreateNode is called on discovery of a new node and returns the ENI node allocation implementation for the new node

func (*InstancesManager) DeleteInstance 

func (m *InstancesManager) DeleteInstance(instanceID string)

DeleteInstance delete instance from m.instances

func (*InstancesManager) FindSecurityGroupByTags 

func (m *InstancesManager) FindSecurityGroupByTags(vpcID string, required ipamTypes.Tags) []*types.SecurityGroup

FindSecurityGroupByTags returns the security groups matching VPC ID and all required tags

The returned security groups slice is immutable so it can be safely accessed

func (*InstancesManager) FindSubnetByIDs 

func (m *InstancesManager) FindSubnetByIDs(vpcID, availabilityZone string, subnetIDs []string) (bestSubnet *ipamTypes.Subnet)

FindSubnetByIDs returns the subnet with the most addresses matching VPC ID, availability zone within a provided list of subnet ids

The returned subnet is immutable so it can be safely accessed

func (*InstancesManager) FindSubnetByTags 

func (m *InstancesManager) FindSubnetByTags(vpcID, availabilityZone string, required ipamTypes.Tags) (bestSubnet *ipamTypes.Subnet)

FindSubnetByTags returns the subnet with the most addresses matching VPC ID, availability zone and all required tags

The returned subnet is immutable so it can be safely accessed

func (*InstancesManager) ForeachInstance 

func (m *InstancesManager) ForeachInstance(instanceID string, fn ipamTypes.InterfaceIterator)

ForeachInstance will iterate over each interface for a particular instance inside `instances` and call `fn`. This function is read-locked for the entire execution.

func (*InstancesManager) GetPoolQuota 

func (m *InstancesManager) GetPoolQuota() ipamTypes.PoolQuotaMap

GetPoolQuota returns the number of available IPs in all IP pools

func (*InstancesManager) GetSubnet 

func (m *InstancesManager) GetSubnet(subnetID string) *ipamTypes.Subnet

GetSubnet returns the subnet by subnet ID

The returned subnet is immutable so it can be safely accessed

func (*InstancesManager) GetSubnets 

func (m *InstancesManager) GetSubnets(ctx context.Context) ipamTypes.SubnetMap

GetSubnets returns all the tracked subnets

The returned subnetMap is immutable so it can be safely accessed

func (*InstancesManager) HasInstance 

func (m *InstancesManager) HasInstance(instanceID string) bool

HasInstance returns whether the instance is in instances

func (*InstancesManager) InstanceSync 

func (m *InstancesManager) InstanceSync(ctx context.Context, instanceID string) time.Time

func (*InstancesManager) Resync 

func (m *InstancesManager) Resync(ctx context.Context) time.Time

Resync fetches the list of EC2 instances and subnets and updates the local cache in the instanceManager. It returns the time when the resync has started or time.Time{} if it did not complete.

func (*InstancesManager) UpdateENI 

func (m *InstancesManager) UpdateENI(instanceID string, eni *eniTypes.ENI)

UpdateENI updates the ENI definition of an ENI for a particular instance. If the ENI is already known, the definition is updated, otherwise the ENI is added to the instance.

type InterfaceDB 

type InterfaceDB struct {
	Clientset client.Clientset
	// contains filtered or unexported fields
}

InterfaceDB contains all the ENIs on a given node. It is used to convert ENI MAC addrs from interface numbers and vice versa, needed for the ENI migration. See https://github.com/cilium/cilium/issues/14336.

func (*InterfaceDB) GetInterfaceNumberByMAC 

func (in *InterfaceDB) GetInterfaceNumberByMAC(mac string) (int, error)

GetInterfaceNumberByMAC implements the linuxrouting.interfaceDB interface. It retrieves the number associated with the ENI device for the given MAC address. The interface number is retrieved from the CiliumNode resource, as this functionality is needed for ENI mode.

func (*InterfaceDB) GetMACByInterfaceNumber 

func (in *InterfaceDB) GetMACByInterfaceNumber(ifaceNum int) (string, error)

GetMACByInterfaceNumber retrieves the MAC address from a given ENI's interface number. This implements the linuxrouting.interfaceDB interface.

type Node 

type Node struct {
	// contains filtered or unexported fields
}

Node represents a Kubernetes node running Cilium with an associated CiliumNode custom resource

func NewNode 

func NewNode(node *ipam.Node, k8sObj *v2.CiliumNode, manager *InstancesManager) *Node

NewNode returns a new Node

func (*Node) AllocateIPs 

func (n *Node) AllocateIPs(ctx context.Context, a *ipam.AllocationAction) error

AllocateIPs performs the ENI allocation oepration

func (*Node) CreateInterface 

func (n *Node) CreateInterface(ctx context.Context, allocation *ipam.AllocationAction, scopedLog *logrus.Entry) (int, string, error)

CreateInterface creates an additional interface with the instance and attaches it to the instance as specified by the CiliumNode. neededAddresses of secondary IPs are assigned to the interface up to the maximum number of addresses as allowed by the instance.

func (*Node) GetMaximumAllocatableIPv4 

func (n *Node) GetMaximumAllocatableIPv4() int

GetMaximumAllocatableIPv4 returns the maximum amount of IPv4 addresses that can be allocated to the instance

func (*Node) GetMinimumAllocatableIPv4 

func (n *Node) GetMinimumAllocatableIPv4() int

GetMinimumAllocatableIPv4 returns the minimum amount of IPv4 addresses that must be allocated to the instance.

func (*Node) GetUsedIPWithPrefixes 

func (n *Node) GetUsedIPWithPrefixes() int

GetUsedIPWithPrefixes returns the total number of used IPs on the node including the prefixes allocated. A prefix is considered as used if there is at least one allocated IP from that prefix. All IPs from a used prefix are included in the count returned.

func (*Node) IsPrefixDelegated 

func (n *Node) IsPrefixDelegated() bool

IsPrefixDelegated indicates whether prefix delegation can be enabled on a node. Currently, mixed usage of secondary IPs and prefixes is not supported. n.mutex read lock must be held before calling this method.

func (*Node) PopulateStatusFields 

func (n *Node) PopulateStatusFields(k8sObj *v2.CiliumNode)

PopulateStatusFields fills in the status field of the CiliumNode custom resource with ENI specific information

func (*Node) PrepareIPAllocation 

func (n *Node) PrepareIPAllocation(scopedLog *logrus.Entry) (a *ipam.AllocationAction, err error)

PrepareIPAllocation returns the number of ENI IPs and interfaces that can be allocated/created.

func (*Node) PrepareIPRelease 

func (n *Node) PrepareIPRelease(excessIPs int, scopedLog *logrus.Entry) *ipam.ReleaseAction

PrepareIPRelease prepares the release of ENI IPs.

func (*Node) ReleaseIPs 

func (n *Node) ReleaseIPs(ctx context.Context, r *ipam.ReleaseAction) error

ReleaseIPs performs the ENI IP release operation

func (*Node) ResyncInterfacesAndIPs 

func (n *Node) ResyncInterfacesAndIPs(ctx context.Context, scopedLog *logrus.Entry) (
	available ipamTypes.AllocationMap,
	stats stats.InterfaceStats,
	err error)

ResyncInterfacesAndIPs is called to retrieve and ENIs and IPs as known to the EC2 API and return them

func (*Node) UpdatedNode 

func (n *Node) UpdatedNode(obj *v2.CiliumNode)

UpdatedNode is called when an update to the CiliumNode is received.

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