types

package
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 Go to latest Published: Aug 12, 2024 License: Apache-2.0 Imports: 17 Imported by: 7

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Constants

This section is empty.

Variables

This section is empty.

Functions

func RemoteSNATDstAddrExclusionCIDRv4 

func RemoteSNATDstAddrExclusionCIDRv4() *cidr.CIDR

RemoteSNATDstAddrExclusionCIDRv4 returns a CIDR for SNAT exclusion. Any packet sent from a local endpoint to an IP address belonging to the CIDR should not be SNAT'd.

func RemoteSNATDstAddrExclusionCIDRv6 

func RemoteSNATDstAddrExclusionCIDRv6() *cidr.CIDR

RemoteSNATDstAddrExclusionCIDRv6 returns a IPv6 CIDR for SNAT exclusion. Any packet sent from a local endpoint to an IP address belonging to the CIDR should not be SNAT'd.

Types

type BackendIDByServiceIDSet 

type BackendIDByServiceIDSet map[uint16]map[loadbalancer.BackendID]struct{} // svc ID => backend ID

BackendIDByServiceIDSet is the type of a set for checking whether a backend belongs to a given service

type BaseProgramOwner 

type BaseProgramOwner interface {
	DeviceConfiguration
	GetCompilationLock() *lock.RWMutex
	Datapath() Datapath
	LocalConfig() *LocalNodeConfiguration
	SetPrefilter(pf PreFilter)
}

BaseProgramOwner is any type for which a loader is building base programs.

type CompileTimeConfiguration 

type CompileTimeConfiguration interface {
	DeviceConfiguration

	// TODO: Move this detail into the datapath
	ConntrackLocalLocked() bool

	// RequireARPPassthrough returns true if the datapath must implement
	// ARP passthrough for this endpoint
	RequireARPPassthrough() bool

	// RequireEgressProg returns true if the endpoint requires an egress
	// program attached to the InterfaceName() invoking the section
	// "to-container"
	RequireEgressProg() bool

	// RequireRouting returns true if the endpoint requires BPF routing to
	// be enabled, when disabled, routing is delegated to Linux routing
	RequireRouting() bool

	// RequireEndpointRoute returns true if the endpoint wishes to have a
	// per endpoint route installed in the host's routing table to point to
	// the endpoint's interface
	RequireEndpointRoute() bool

	// GetPolicyVerdictLogFilter returns the PolicyVerdictLogFilter for the endpoint
	GetPolicyVerdictLogFilter() uint32

	// IsHost returns true if the endpoint is the host endpoint.
	IsHost() bool
}

CompileTimeConfiguration provides datapath implementations a clean interface to access endpoint-specific configuration that can only be changed at compile time.

type ConfigWriter 

type ConfigWriter interface {
	// WriteNodeConfig writes the implementation-specific configuration of
	// node-wide options into the specified writer.
	WriteNodeConfig(io.Writer, *LocalNodeConfiguration) error

	// WriteNetdevConfig writes the implementation-specific configuration
	// of configurable options to the specified writer. Options specified
	// here will apply to base programs and not to endpoints, though
	// endpoints may have equivalent configurable options.
	WriteNetdevConfig(io.Writer, DeviceConfiguration) error

	// WriteTemplateConfig writes the implementation-specific configuration
	// of configurable options for BPF templates to the specified writer.
	WriteTemplateConfig(w io.Writer, cfg EndpointConfiguration) error

	// WriteEndpointConfig writes the implementation-specific configuration
	// of configurable options for the endpoint to the specified writer.
	WriteEndpointConfig(w io.Writer, cfg EndpointConfiguration) error
}

ConfigWriter is anything which writes the configuration for various datapath program types.

type Datapath 

type Datapath interface {
	ConfigWriter
	IptablesManager

	// Node must return the handler for node events
	Node() NodeHandler

	NodeIDs() NodeIDHandler

	NodeNeighbors() NodeNeighbors

	// LocalNodeAddressing must return the node addressing implementation
	// of the local node
	LocalNodeAddressing() NodeAddressing

	// Loader must return the implementation of the loader, which is responsible
	// for loading, reloading, and compiling datapath programs.
	Loader() Loader

	// WireguardAgent returns the Wireguard agent for the local node
	WireguardAgent() WireguardAgent

	// LBMap returns the load-balancer map
	LBMap() LBMap

	Procfs() string
}

Datapath is the interface to abstract all datapath interactions. The abstraction allows to implement the datapath requirements with multiple implementations

type DeviceConfiguration 

type DeviceConfiguration interface {
	// GetCIDRPrefixLengths fetches the lists of unique IPv6 and IPv4
	// prefix lengths used for datapath lookups, each of which is sorted
	// from longest prefix to shortest prefix. It must return more than
	// one element in each returned array.
	GetCIDRPrefixLengths() (s6, s4 []int)

	// GetOptions fetches the configurable datapath options from the owner.
	GetOptions() *option.IntOptions
}

DeviceConfiguration is an interface for injecting configuration of datapath options that affect lookups and logic applied at a per-device level, whether those are devices associated with the endpoint or associated with the host.

type Endpoint 

type Endpoint interface {
	EndpointConfiguration
	InterfaceName() string
	Logger(subsystem string) *logrus.Entry
	StateDir() string
}

Endpoint provides access endpoint configuration information that is necessary to compile and load the datapath.

type EndpointConfiguration 

type EndpointConfiguration interface {
	CompileTimeConfiguration
	LoadTimeConfiguration
}

EndpointConfiguration provides datapath implementations a clean interface to access endpoint-specific configuration when configuring the datapath.

type IptablesManager 

type IptablesManager interface {
	// InstallProxyRules creates the necessary datapath config (e.g., iptables
	// rules for redirecting host proxy traffic on a specific ProxyPort)
	InstallProxyRules(ctx context.Context, proxyPort uint16, ingress, localOnly bool, name string) error

	// SupportsOriginalSourceAddr tells if the datapath supports
	// use of original source addresses in proxy upstream
	// connections.
	SupportsOriginalSourceAddr() bool
	InstallRules(ctx context.Context, ifName string, quiet, install bool) error

	// GetProxyPort fetches the existing proxy port configured for the
	// specified listener. Used early in bootstrap to reopen proxy ports.
	GetProxyPort(listener string) uint16

	// InstallNoTrackRules is explicitly called when a pod has valid
	// "policy.cilium.io/no-track-port" annotation.  When
	// InstallNoConntrackIptRules flag is set, a super set of v4 NOTRACK
	// rules will be automatically installed upon agent bootstrap (via
	// function addNoTrackPodTrafficRules) and this function will be
	// skipped.  When InstallNoConntrackIptRules is not set, this function
	// will be executed to install NOTRACK rules.  The rules installed by
	// this function is very specific, for now, the only user is
	// node-local-dns pods.
	InstallNoTrackRules(IP string, port uint16, ipv6 bool) error

	// See comments for InstallNoTrackRules.
	RemoveNoTrackRules(IP string, port uint16, ipv6 bool) error
}

IptablesManager manages iptables rules.

type LBMap 

type LBMap interface {
	UpsertService(*UpsertServiceParams) error
	UpsertMaglevLookupTable(uint16, map[string]*loadbalancer.Backend, bool) error
	IsMaglevLookupTableRecreated(bool) bool
	DeleteService(loadbalancer.L3n4AddrID, int, bool, loadbalancer.SVCNatPolicy) error
	AddBackend(*loadbalancer.Backend, bool) error
	UpdateBackendWithState(*loadbalancer.Backend) error
	DeleteBackendByID(loadbalancer.BackendID) error
	AddAffinityMatch(uint16, loadbalancer.BackendID) error
	DeleteAffinityMatch(uint16, loadbalancer.BackendID) error
	UpdateSourceRanges(uint16, []*cidr.CIDR, []*cidr.CIDR, bool) error
	DumpServiceMaps() ([]*loadbalancer.SVC, []error)
	DumpBackendMaps() ([]*loadbalancer.Backend, error)
	DumpAffinityMatches() (BackendIDByServiceIDSet, error)
	DumpSourceRanges(bool) (SourceRangeSetByServiceID, error)
}

LBMap is the interface describing methods for manipulating service maps.

type LoadTimeConfiguration 

type LoadTimeConfiguration interface {
	// GetID returns a locally-significant endpoint identification number.
	GetID() uint64
	// StringID returns the string-formatted version of the ID from GetID().
	StringID() string
	// GetIdentity returns a globally-significant numeric security identity.
	GetIdentity() identity.NumericIdentity

	// GetIdentityLocked returns a globally-significant numeric security
	// identity while assuming that the backing data structure is locked.
	// This function should be removed in favour of GetIdentity()
	GetIdentityLocked() identity.NumericIdentity

	IPv4Address() netip.Addr
	IPv6Address() netip.Addr
	GetNodeMAC() mac.MAC
}

LoadTimeConfiguration provides datapath implementations a clean interface to access endpoint-specific configuration that can be changed at load time.

type Loader 

type Loader interface {
	CallsMapPath(id uint16) string
	CustomCallsMapPath(id uint16) string
	CompileAndLoad(ctx context.Context, ep Endpoint, stats *metrics.SpanStat) error
	CompileOrLoad(ctx context.Context, ep Endpoint, stats *metrics.SpanStat) error
	ReloadDatapath(ctx context.Context, ep Endpoint, stats *metrics.SpanStat) error
	EndpointHash(cfg EndpointConfiguration) (string, error)
	Unload(ep Endpoint)
	Reinitialize(ctx context.Context, o BaseProgramOwner, deviceMTU int, iptMgr IptablesManager, p Proxy) error
}

Loader is an interface to abstract out loading of datapath programs.

type LocalNodeConfiguration 

type LocalNodeConfiguration struct {
	// MtuConfig is the MTU configuration of the node.
	//
	// This field is immutable at runtime. The value will not change in
	// subsequent calls to NodeConfigurationChanged().
	MtuConfig mtu.Configuration

	// AuxiliaryPrefixes is the list of auxiliary prefixes that should be
	// configured in addition to the node PodCIDR
	//
	// This field is mutable. The implementation of
	// NodeConfigurationChanged() must adjust the routes accordingly.
	AuxiliaryPrefixes []*cidr.CIDR

	// EnableIPv4 enables use of IPv4. Routing to the IPv4 allocation CIDR
	// of other nodes must be enabled.
	//
	// This field is immutable at runtime. The value will not change in
	// subsequent calls to NodeConfigurationChanged().
	EnableIPv4 bool

	// EnableIPv6 enables use of IPv6. Routing to the IPv6 allocation CIDR
	// of other nodes must be enabled.
	//
	// This field is immutable at runtime. The value will not change in
	// subsequent calls to NodeConfigurationChanged().
	EnableIPv6 bool

	// UseSingleClusterRoute enables the use of a single cluster-wide route
	// to direct traffic from the host into the Cilium datapath.  This
	// avoids the requirement to install a separate route for each node
	// CIDR and can thus improve the overhead when operating large clusters
	// with significant node event churn due to auto-scaling.
	//
	// Use of UseSingleClusterRoute must be compatible with
	// EnableAutoDirectRouting. When both are enabled, any direct node
	// route must take precedence over the cluster-wide route as per LPM
	// routing definition.
	//
	// This field is mutable. The implementation of
	// NodeConfigurationChanged() must adjust the routes accordingly.
	UseSingleClusterRoute bool

	// EnableEncapsulation enables use of encapsulation in communication
	// between nodes.
	//
	// This field is immutable at runtime. The value will not change in
	// subsequent calls to NodeConfigurationChanged().
	EnableEncapsulation bool

	// EnableAutoDirectRouting enables the use of direct routes for
	// communication between nodes if two nodes have direct L2
	// connectivity.
	//
	// EnableAutoDirectRouting must be compatible with EnableEncapsulation
	// and must provide a fallback to use encapsulation if direct routing
	// is not feasible and encapsulation is enabled.
	//
	// This field is immutable at runtime. The value will not change in
	// subsequent calls to NodeConfigurationChanged().
	EnableAutoDirectRouting bool

	// EnableLocalNodeRoute enables installation of the route which points
	// the allocation prefix of the local node. Disabling this option is
	// useful when another component is responsible for the routing of the
	// allocation CIDR IPs into Cilium endpoints.
	EnableLocalNodeRoute bool

	// EnableIPSec enables IPSec routes
	EnableIPSec bool

	// EncryptNode enables encrypting NodeIP traffic requires EnableIPSec
	EncryptNode bool

	// IPv4PodSubnets is a list of IPv4 subnets that pod IPs are assigned from
	// these are then used when encryption is enabled to configure the node
	// for encryption over these subnets at node initialization.
	IPv4PodSubnets []*net.IPNet

	// IPv6PodSubnets is a list of IPv6 subnets that pod IPs are assigned from
	// these are then used when encryption is enabled to configure the node
	// for encryption over these subnets at node initialization.
	IPv6PodSubnets []*net.IPNet
}

LocalNodeConfiguration represents the configuration of the local node

type NodeAddressing 

type NodeAddressing interface {
	IPv6() NodeAddressingFamily
	IPv4() NodeAddressingFamily
}

NodeAddressing implements addressing of a node

type NodeAddressingFamily 

type NodeAddressingFamily interface {
	// Router is the address that will act as the router on each node where
	// an agent is running on. Endpoints have a default route that points
	// to this address.
	Router() net.IP

	// PrimaryExternal is the primary external address of the node. Nodes
	// must be able to reach each other via this address.
	PrimaryExternal() net.IP

	// AllocationCIDR is the CIDR used for IP allocation of all endpoints
	// on the node
	AllocationCIDR() *cidr.CIDR

	// LocalAddresses lists all local addresses
	LocalAddresses() ([]net.IP, error)

	// LoadBalancerNodeAddresses lists all addresses on which HostPort and
	// NodePort services should be responded to
	LoadBalancerNodeAddresses() []net.IP
}

NodeAddressingFamily is the node addressing information for a particular address family

type NodeHandler 

type NodeHandler interface {
	// NodeAdd is called when a node is discovered for the first time.
	NodeAdd(newNode nodeTypes.Node) error

	// NodeUpdate is called when a node definition changes. Both the old
	// and new node definition is provided. NodeUpdate() is never called
	// before NodeAdd() is called for a particular node.
	NodeUpdate(oldNode, newNode nodeTypes.Node) error

	// NodeDelete is called after a node has been deleted
	NodeDelete(node nodeTypes.Node) error

	// AllNodeValidateImplementation is called to validate the implementation
	// of all nodes in the node cache.
	AllNodeValidateImplementation()

	// NodeValidateImplementation is called to validate the implementation of
	// the node in the datapath. This function is intended to be run on an
	// interval to ensure that the datapath is consistently converged.
	NodeValidateImplementation(node nodeTypes.Node) error

	// NodeConfigurationChanged is called when the local node configuration
	// has changed
	NodeConfigurationChanged(config LocalNodeConfiguration) error
}

NodeHandler handles node related events such as addition, update or deletion of nodes or changes to the local node configuration.

Node events apply to the local node as well as to remote nodes. The implementation can differ between the own local node and remote nodes by calling node.IsLocal().

type NodeIDHandler 

type NodeIDHandler interface {
	// GetNodeIP returns the string node IP that was previously registered as the given node ID.
	GetNodeIP(uint16) string

	// GetNodeID gets the node ID for the given node IP. If none is found, exists is false.
	GetNodeID(nodeIP net.IP) (nodeID uint16, exists bool)

	// DumpNodeIDs returns all node IDs and their associated IP addresses.
	DumpNodeIDs() []*models.NodeID

	// RestoreNodeIDs restores node IDs and their associated IP addresses from the
	// BPF map and into the node handler in-memory copy.
	RestoreNodeIDs()
}

type NodeNeighbors 

type NodeNeighbors interface {
	// NodeNeighDiscoveryEnabled returns whether node neighbor discovery is enabled
	NodeNeighDiscoveryEnabled() bool

	// NodeNeighborRefresh is called to refresh node neighbor table
	NodeNeighborRefresh(ctx context.Context, node nodeTypes.Node)

	// NodeCleanNeighbors cleans all neighbor entries for the direct routing device
	// and the encrypt interface.
	NodeCleanNeighbors(migrateOnly bool)
}

type PreFilter 

type PreFilter interface {
	WriteConfig(fw io.Writer)
	Dump(to []string) ([]string, int64)
	Insert(revision int64, cidrs []net.IPNet) error
	Delete(revision int64, cidrs []net.IPNet) error
}

PreFilter an interface for an XDP pre-filter.

type Proxy 

type Proxy interface {
	ReinstallRules(ctx context.Context) error
}

Proxy is any type which installs rules related to redirecting traffic to a proxy.

type SourceRangeSetByServiceID 

type SourceRangeSetByServiceID map[uint16][]*cidr.CIDR // svc ID => src range CIDRs

type UpsertServiceParams 

type UpsertServiceParams struct {
	ID   uint16
	IP   net.IP
	Port uint16

	// PreferredBackends is a subset of ActiveBackends
	// Note: this is only used in clustermesh with service affinity annotation.
	PreferredBackends         map[string]*loadbalancer.Backend
	ActiveBackends            map[string]*loadbalancer.Backend
	NonActiveBackends         []loadbalancer.BackendID
	PrevBackendsCount         int
	IPv6                      bool
	Type                      loadbalancer.SVCType
	NatPolicy                 loadbalancer.SVCNatPolicy
	ExtLocal                  bool
	IntLocal                  bool
	Scope                     uint8
	SessionAffinity           bool
	SessionAffinityTimeoutSec uint32
	CheckSourceRange          bool
	UseMaglev                 bool
	L7LBProxyPort             uint16                   // Non-zero for L7 LB services
	Name                      loadbalancer.ServiceName // Fully qualified name of the service
	LoopbackHostport          bool
}

func (*UpsertServiceParams) GetOrderedBackends 

func (p *UpsertServiceParams) GetOrderedBackends() []loadbalancer.BackendID

GetOrderedBackends returns an ordered list of backends with all the sorted preferred backend followed by active and non-active backends. Encapsulates logic to be also used in unit tests.

type WireguardAgent 

type WireguardAgent interface {
	UpdatePeer(nodeName, pubKeyHex string, nodeIPv4, nodeIPv6 net.IP) error
	DeletePeer(nodeName string) error
	Status(includePeers bool) (*models.WireguardStatus, error)
}

WireguardAgent manages the Wireguard peers

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