awsutils

package
v1.9.3 Latest Latest
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 Go to latest Published: Oct 15, 2021 License: Apache-2.0 Imports: 24 Imported by: 36

Documentation

Overview

Package awsutils is a utility package for calling EC2 or IMDS

Index

Constants

View Source 
const (

	// UnknownInstanceType indicates that the instance type is not yet supported
	UnknownInstanceType = "vpc ip resource(eni ip limit): unknown instance type"
)

Variables

View Source 
var (
	// ErrENINotFound is an error when ENI is not found.
	ErrENINotFound = errors.New("ENI is not found")
	// ErrAllSecondaryIPsNotFound is returned when not all secondary IPs on an ENI have been assigned
	ErrAllSecondaryIPsNotFound = errors.New("All secondary IPs not found")
	// ErrNoSecondaryIPsFound is returned when not all secondary IPs on an ENI have been assigned
	ErrNoSecondaryIPsFound = errors.New("No secondary IPs have been assigned to this ENI")
	// ErrNoNetworkInterfaces occurs when DescribeNetworkInterfaces(eniID) returns no network interfaces
	ErrNoNetworkInterfaces = errors.New("No network interfaces found for ENI")
)
View Source 
var InstanceNetworkingLimits = map[string]InstanceTypeLimits{}/* 416 elements not displayed */

InstanceNetworkingLimits contains a mapping from instance type to networking limits for the type. Documentation found at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html#AvailableIpPerENI

Functions

func IsNotFound added in v1.8.0 

func IsNotFound(err error) bool

IsNotFound returns true if the error was caused by an AWS API 404 response.

Types

type APIs 

type APIs interface {
	// AllocENI creates an ENI and attaches it to the instance
	AllocENI(useCustomCfg bool, sg []*string, subnet string) (eni string, err error)

	// FreeENI detaches ENI interface and deletes it
	FreeENI(eniName string) error

	// TagENI Tags ENI with current tags to contain expected tags.
	TagENI(eniID string, currentTags map[string]string) error

	// GetAttachedENIs retrieves eni information from instance metadata service
	GetAttachedENIs() (eniList []ENIMetadata, err error)

	// GetIPv4sFromEC2 returns the IPv4 addresses for a given ENI
	GetIPv4sFromEC2(eniID string) (addrList []*ec2.NetworkInterfacePrivateIpAddress, err error)

	// GetIPv4PrefixesFromEC2 returns the IPv4 addresses for a given ENI
	GetIPv4PrefixesFromEC2(eniID string) (addrList []*ec2.Ipv4PrefixSpecification, err error)

	// DescribeAllENIs calls EC2 and returns a fully populated DescribeAllENIsResult struct and an error
	DescribeAllENIs() (DescribeAllENIsResult, error)

	// AllocIPAddress allocates an IP address for an ENI
	AllocIPAddress(eniID string) error

	// AllocIPAddresses allocates numIPs IP addresses on a ENI
	AllocIPAddresses(eniID string, numIPs int) error

	// DeallocIPAddresses deallocates the list of IP addresses from a ENI
	DeallocIPAddresses(eniID string, ips []string) error

	// DeallocPrefixAddresses deallocates the list of IP addresses from a ENI
	DeallocPrefixAddresses(eniID string, ips []string) error

	// GetVPCIPv4CIDRs returns VPC's CIDRs from instance metadata
	GetVPCIPv4CIDRs() ([]string, error)

	// GetLocalIPv4 returns the primary IP address on the primary ENI interface
	GetLocalIPv4() net.IP

	// GetPrimaryENI returns the primary ENI
	GetPrimaryENI() string

	// GetENIIPv4Limit return IP address limit per ENI based on EC2 instance type
	GetENIIPv4Limit() int

	// GetENILimit returns the number of ENIs that can be attached to an instance
	GetENILimit() int

	// GetPrimaryENImac returns the mac address of the primary ENI
	GetPrimaryENImac() string

	// SetUnmanagedENIs sets the list of unmanaged ENI IDs
	SetUnmanagedENIs(eniIDs []string)

	// IsUnmanagedENI checks if an ENI is unmanaged
	IsUnmanagedENI(eniID string) bool

	// 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

	//isCNIUnmanagedENI
	IsCNIUnmanagedENI(eniID string) bool

	//RefreshSGIDs
	RefreshSGIDs(mac string) error

	//GetInstanceHypervisorFamily returns the hypervisor family for the instance
	GetInstanceHypervisorFamily() string

	//GetInstanceType returns the EC2 instance type
	GetInstanceType() string

	//Update cached prefix delegation flag
	InitCachedPrefixDelegation(bool)

	// GetInstanceID returns the instance ID
	GetInstanceID() string

	// FetchInstanceTypeLimits Verify if the InstanceNetworkingLimits has the ENI limits else make EC2 call to fill cache.
	FetchInstanceTypeLimits() error
}

APIs defines interfaces calls for adding/getting/deleting ENIs/secondary IPs. The APIs are not thread-safe.

type DescribeAllENIsResult added in v1.7.6 

type DescribeAllENIsResult struct {
	ENIMetadata     []ENIMetadata
	TagMap          map[string]TagMap
	TrunkENI        string
	EFAENIs         map[string]bool
	MultiCardENIIDs []string
}

DescribeAllENIsResult contains the fully

type EC2InstanceMetadataCache 

type EC2InstanceMetadataCache struct {
	// contains filtered or unexported fields
}

EC2InstanceMetadataCache caches instance metadata

func New 

func New(useCustomNetworking, disableENIProvisioning bool) (*EC2InstanceMetadataCache, error)

New creates an EC2InstanceMetadataCache

func (*EC2InstanceMetadataCache) AllocENI 

func (cache *EC2InstanceMetadataCache) AllocENI(useCustomCfg bool, sg []*string, subnet string) (string, error)

AllocENI creates an ENI and attaches it to the instance returns: newly created ENI ID

func (*EC2InstanceMetadataCache) AllocIPAddress 

func (cache *EC2InstanceMetadataCache) AllocIPAddress(eniID string) error

AllocIPAddress allocates an IP address for an ENI

func (*EC2InstanceMetadataCache) AllocIPAddresses added in v1.1.0 

func (cache *EC2InstanceMetadataCache) AllocIPAddresses(eniID string, numIPs int) error

AllocIPAddresses allocates numIPs of IP address on an ENI

func (*EC2InstanceMetadataCache) DeallocIPAddresses added in v1.5.0 

func (cache *EC2InstanceMetadataCache) DeallocIPAddresses(eniID string, ips []string) error

DeallocIPAddresses frees IP address on an ENI

func (*EC2InstanceMetadataCache) DeallocPrefixAddresses added in v1.9.0 

func (cache *EC2InstanceMetadataCache) DeallocPrefixAddresses(eniID string, prefixes []string) error

DeallocPrefixAddresses frees Prefixes on an ENI

func (*EC2InstanceMetadataCache) DescribeAllENIs added in v1.6.1 

func (cache *EC2InstanceMetadataCache) DescribeAllENIs() (DescribeAllENIsResult, error)

DescribeAllENIs calls EC2 to refresh the ENIMetadata and tags for all attached ENIs

func (*EC2InstanceMetadataCache) FetchInstanceTypeLimits added in v1.9.1 

func (cache *EC2InstanceMetadataCache) FetchInstanceTypeLimits() error

func (*EC2InstanceMetadataCache) FreeENI 

func (cache *EC2InstanceMetadataCache) FreeENI(eniName string) error

FreeENI detaches and deletes the ENI interface

func (*EC2InstanceMetadataCache) GetAttachedENIs 

func (cache *EC2InstanceMetadataCache) GetAttachedENIs() (eniList []ENIMetadata, err error)

GetAttachedENIs retrieves ENI information from meta data service

func (*EC2InstanceMetadataCache) GetENIIPv4Limit added in v1.6.4 

func (cache *EC2InstanceMetadataCache) GetENIIPv4Limit() int

GetENIIPv4Limit return IP address limit per ENI based on EC2 instance type

func (*EC2InstanceMetadataCache) GetENILimit 

func (cache *EC2InstanceMetadataCache) GetENILimit() int

GetENILimit returns the number of ENIs can be attached to an instance

func (*EC2InstanceMetadataCache) GetIPv4PrefixesFromEC2 added in v1.9.0 

func (cache *EC2InstanceMetadataCache) GetIPv4PrefixesFromEC2(eniID string) (addrList []*ec2.Ipv4PrefixSpecification, err error)

GetIPv4PrefixesFromEC2 calls EC2 and returns a list of all addresses on the ENI

func (*EC2InstanceMetadataCache) GetIPv4sFromEC2 added in v1.6.1 

func (cache *EC2InstanceMetadataCache) GetIPv4sFromEC2(eniID string) (addrList []*ec2.NetworkInterfacePrivateIpAddress, err error)

GetIPv4sFromEC2 calls EC2 and returns a list of all addresses on the ENI

func (*EC2InstanceMetadataCache) GetInstanceHypervisorFamily added in v1.9.0 

func (cache *EC2InstanceMetadataCache) GetInstanceHypervisorFamily() string

GetInstanceHypervisorFamily return hypervior of EC2 instance type

func (*EC2InstanceMetadataCache) GetInstanceID added in v1.9.1 

func (cache *EC2InstanceMetadataCache) GetInstanceID() string

GetInstanceID returns the instance ID

func (*EC2InstanceMetadataCache) GetInstanceType added in v1.9.0 

func (cache *EC2InstanceMetadataCache) GetInstanceType() string

GetInstanceType return EC2 instance type

func (*EC2InstanceMetadataCache) GetLocalIPv4 

func (cache *EC2InstanceMetadataCache) GetLocalIPv4() net.IP

GetLocalIPv4 returns the primary IP address on the primary interface

func (*EC2InstanceMetadataCache) GetPrimaryENI 

func (cache *EC2InstanceMetadataCache) GetPrimaryENI() string

GetPrimaryENI returns the primary ENI

func (*EC2InstanceMetadataCache) GetPrimaryENImac added in v1.2.1 

func (cache *EC2InstanceMetadataCache) GetPrimaryENImac() string

GetPrimaryENImac returns the mac address of primary eni

func (*EC2InstanceMetadataCache) GetVPCIPv4CIDRs added in v1.3.0 

func (cache *EC2InstanceMetadataCache) GetVPCIPv4CIDRs() ([]string, error)

GetVPCIPv4CIDRs returns VPC CIDRs

func (*EC2InstanceMetadataCache) InitCachedPrefixDelegation added in v1.9.0 

func (cache *EC2InstanceMetadataCache) InitCachedPrefixDelegation(enableIpv4PrefixDelegation bool)

func (*EC2InstanceMetadataCache) IsCNIUnmanagedENI added in v1.7.10 

func (cache *EC2InstanceMetadataCache) IsCNIUnmanagedENI(eniID string) bool

IsCNIUnmanagedENI returns if the eni is unmanaged

func (*EC2InstanceMetadataCache) IsUnmanagedENI added in v1.7.2 

func (cache *EC2InstanceMetadataCache) IsUnmanagedENI(eniID string) bool

IsUnmanagedENI returns if the eni is unmanaged

func (*EC2InstanceMetadataCache) RefreshSGIDs added in v1.7.10 

func (cache *EC2InstanceMetadataCache) RefreshSGIDs(mac string) error

RefreshSGIDs retrieves security groups

func (*EC2InstanceMetadataCache) SetCNIUnmanagedENIs added in v1.7.10 

func (cache *EC2InstanceMetadataCache) SetCNIUnmanagedENIs(eniID []string) error

SetCNIUnmanagedENIs Set unmanaged ENI set

func (*EC2InstanceMetadataCache) SetUnmanagedENIs added in v1.7.2 

func (cache *EC2InstanceMetadataCache) SetUnmanagedENIs(eniIDs []string)

SetUnmanagedENIs Set unmanaged ENI set

func (*EC2InstanceMetadataCache) TagENI added in v1.8.0 

func (cache *EC2InstanceMetadataCache) TagENI(eniID string, currentTags map[string]string) error

func (*EC2InstanceMetadataCache) WaitForENIAndIPsAttached added in v1.7.2 

func (cache *EC2InstanceMetadataCache) WaitForENIAndIPsAttached(eni string, wantedCidrs int) (eniMetadata ENIMetadata, err error)

WaitForENIAndIPsAttached waits until the ENI has been attached and the secondary IPs have been added

type EC2MetadataIface added in v1.8.0 

type EC2MetadataIface interface {
	GetMetadataWithContext(ctx context.Context, p string) (string, error)
}

EC2MetadataIface is a subset of the EC2Metadata API.

type ENIMetadata 

type ENIMetadata struct {
	// ENIID is the id of network interface
	ENIID string

	// MAC is the mac address of network interface
	MAC string

	// DeviceNumber is the  device number of network interface
	DeviceNumber int // 0 means it is primary interface

	// SubnetIPv4CIDR is the ipv4 cider of network interface
	SubnetIPv4CIDR string

	// The ip addresses allocated for the network interface
	IPv4Addresses []*ec2.NetworkInterfacePrivateIpAddress

	// IPv4 Prefixes allocated for the network interface
	IPv4Prefixes []*ec2.Ipv4PrefixSpecification
}

ENIMetadata contains information about an ENI

func (ENIMetadata) PrimaryIPv4Address added in v1.6.1 

func (eni ENIMetadata) PrimaryIPv4Address() string

PrimaryIPv4Address returns the primary IP of this node

type FakeIMDS added in v1.8.0 

type FakeIMDS map[string]interface{}

FakeIMDS is a trivial implementation of EC2MetadataIface using an in-memory map - for testing.

func (FakeIMDS) GetMetadataWithContext added in v1.8.0 

func (f FakeIMDS) GetMetadataWithContext(ctx context.Context, p string) (string, error)

GetMetadataWithContext implements the EC2MetadataIface interface.

type InstanceTypeLimits added in v1.6.4 

type InstanceTypeLimits struct {
	ENILimit       int
	IPv4Limit      int
	HypervisorType string
}

InstanceTypeLimits keeps track of limits for an instance type

type StringSet added in v1.6.4 

type StringSet struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

StringSet is a set of strings

func (*StringSet) Difference added in v1.6.4 

func (ss *StringSet) Difference(other *StringSet) *StringSet

Difference compares this StringSet with another

func (*StringSet) Has added in v1.7.2 

func (ss *StringSet) Has(item string) bool

Has returns true if the StringSet contains the string

func (*StringSet) Set added in v1.6.4 

func (ss *StringSet) Set(items []string)

Set sets the string set

func (*StringSet) SortedList added in v1.6.4 

func (ss *StringSet) SortedList() []string

SortedList returns a sorted string slice from this set

type TagMap added in v1.6.1 

type TagMap map[string]string

TagMap keeps track of the EC2 tags on each ENI

type TypedIMDS added in v1.8.0 

type TypedIMDS struct {
	EC2MetadataIface
}

TypedIMDS is a typed wrapper around raw untyped IMDS SDK API.

func (TypedIMDS) GetAZ added in v1.8.0 

func (imds TypedIMDS) GetAZ(ctx context.Context) (string, error)

GetAZ returns the Availability Zone in which the instance launched.

func (TypedIMDS) GetDeviceNumber added in v1.8.0 

func (imds TypedIMDS) GetDeviceNumber(ctx context.Context, mac string) (int, error)

GetDeviceNumber returns the unique device number associated with an interface. The primary interface is 0.

func (TypedIMDS) GetIPv6s added in v1.8.0 

func (imds TypedIMDS) GetIPv6s(ctx context.Context, mac string) ([]net.IP, error)

GetIPv6s returns the IPv6 addresses associated with the interface.

func (TypedIMDS) GetInstanceID added in v1.8.0 

func (imds TypedIMDS) GetInstanceID(ctx context.Context) (string, error)

GetInstanceID returns the ID of this instance.

func (TypedIMDS) GetInstanceType added in v1.8.0 

func (imds TypedIMDS) GetInstanceType(ctx context.Context) (string, error)

GetInstanceType returns the type of this instance.

func (TypedIMDS) GetInterfaceID added in v1.8.0 

func (imds TypedIMDS) GetInterfaceID(ctx context.Context, mac string) (string, error)

GetInterfaceID returns the ID of the network interface.

func (TypedIMDS) GetLocalIPv4 added in v1.8.0 

func (imds TypedIMDS) GetLocalIPv4(ctx context.Context) (net.IP, error)

GetLocalIPv4 returns the private (primary) IPv4 address of the instance.

func (TypedIMDS) GetLocalIPv4Prefixes added in v1.9.0 

func (imds TypedIMDS) GetLocalIPv4Prefixes(ctx context.Context, mac string) ([]net.IPNet, error)

GetLocalIPv4Prefixes returns the IPv4 prefixes delegated to this interface

func (TypedIMDS) GetLocalIPv4s added in v1.8.0 

func (imds TypedIMDS) GetLocalIPv4s(ctx context.Context, mac string) ([]net.IP, error)

GetLocalIPv4s returns the private IPv4 addresses associated with the interface. First returned address is the primary address.

func (TypedIMDS) GetMAC added in v1.8.0 

func (imds TypedIMDS) GetMAC(ctx context.Context) (string, error)

GetMAC returns the first/primary network interface mac address.

func (TypedIMDS) GetMACs added in v1.8.0 

func (imds TypedIMDS) GetMACs(ctx context.Context) ([]string, error)

GetMACs returns the interface addresses attached to the instance.

func (TypedIMDS) GetSecurityGroupIDs added in v1.8.0 

func (imds TypedIMDS) GetSecurityGroupIDs(ctx context.Context, mac string) ([]string, error)

GetSecurityGroupIDs returns the IDs of the security groups to which the network interface belongs.

func (TypedIMDS) GetSubnetID added in v1.8.0 

func (imds TypedIMDS) GetSubnetID(ctx context.Context, mac string) (string, error)

GetSubnetID returns the ID of the subnet in which the interface resides.

func (TypedIMDS) GetSubnetIPv4CIDRBlock added in v1.8.0 

func (imds TypedIMDS) GetSubnetIPv4CIDRBlock(ctx context.Context, mac string) (net.IPNet, error)

GetSubnetIPv4CIDRBlock returns the IPv4 CIDR block for the subnet in which the interface resides.

func (TypedIMDS) GetVPCIPv4CIDRBlocks added in v1.8.0 

func (imds TypedIMDS) GetVPCIPv4CIDRBlocks(ctx context.Context, mac string) ([]net.IPNet, error)

GetVPCIPv4CIDRBlocks returns the IPv4 CIDR blocks for the VPC.

func (TypedIMDS) GetVPCIPv6CIDRBlocks added in v1.8.0 

func (imds TypedIMDS) GetVPCIPv6CIDRBlocks(ctx context.Context, mac string) ([]net.IPNet, error)

GetVPCIPv6CIDRBlocks returns the IPv6 CIDR blocks for the VPC.

Source Files

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Directories

Path Synopsis
Package mock_awsutils is a generated GoMock package.
 Package mock_awsutils is a generated GoMock package.

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