service

Documentation

Index

• Constants
• func AcquireBackendID(l3n4Addr loadbalancer.L3n4Addr) (loadbalancer.BackendID, error)
• func AcquireID(l3n4Addr loadbalancer.L3n4Addr, baseID uint32) (*loadbalancer.L3n4AddrID, error)
• func DeleteBackendID(id loadbalancer.BackendID)
• func DeleteID(id uint32) error
• func GetID(id uint32) (*loadbalancer.L3n4AddrID, error)
• func LookupBackendID(l3n4Addr loadbalancer.L3n4Addr) (loadbalancer.BackendID, error)
• func RestoreBackendID(l3n4Addr loadbalancer.L3n4Addr, id loadbalancer.BackendID) error
• func RestoreID(l3n4Addr loadbalancer.L3n4Addr, baseID uint32) (*loadbalancer.L3n4AddrID, error)
• type IDAllocator
  • func NewIDAllocator(nextID uint32, maxID uint32) *IDAllocator
• type LBMap
• type Service
  • func NewService(monitorNotify monitorNotify) *Service
  • func (s *Service) DeleteService(frontend lb.L3n4Addr) (bool, error)
  • func (s *Service) DeleteServiceByID(id lb.ServiceID) (bool, error)
  • func (s *Service) GetCurrentTs() time.Time
  • func (s *Service) GetDeepCopyServiceByID(id lb.ServiceID) (*lb.SVC, bool)
  • func (s *Service) GetDeepCopyServices() []*lb.SVC
  • func (s *Service) GetLastUpdatedTs() time.Time
  • func (s *Service) GetServiceNameByAddr(addr lb.L3n4Addr) (string, string, bool)
  • func (s *Service) InitMaps(ipv6, ipv4, sockMaps, restore bool) error
  • func (s *Service) RestoreServices() error
  • func (s *Service) SyncWithK8sFinished() error
  • func (s *Service) UpsertService(params *lb.SVC) (bool, lb.ID, error)

Constants

const (
	// FirstFreeServiceID is the first ID for which the services should be assigned.
	FirstFreeServiceID = uint32(1)

	// MaxSetOfServiceID is maximum number of set of service IDs that can be stored
	// in the kvstore or the local ID allocator.
	MaxSetOfServiceID = uint32(0xFFFF)

	// FirstFreeBackendID is the first ID for which the backend should be assigned.
	// BPF datapath assumes that backend_id cannot be 0.
	FirstFreeBackendID = uint32(1)

	// MaxSetOfBackendID is maximum number of set of backendIDs IDs that can be
	// stored in the local ID allocator.
	MaxSetOfBackendID = uint32(0xFFFFFFFF)
)

Functions

func AcquireBackendID

func AcquireBackendID(l3n4Addr loadbalancer.L3n4Addr) (loadbalancer.BackendID, error)

AcquireBackendID acquires a new local ID for the given backend.

func AcquireID

func AcquireID(l3n4Addr loadbalancer.L3n4Addr, baseID uint32) (*loadbalancer.L3n4AddrID, error)

AcquireID acquires a service ID

func DeleteBackendID

func DeleteBackendID(id loadbalancer.BackendID)

DeleteBackendID releases the given backend ID. TODO(brb) maybe provide l3n4Addr as an arg for the extra safety.

func DeleteID

func DeleteID(id uint32) error

DeleteID deletes the L3n4AddrID belonging to the given id from the kvstore.

func GetID

func GetID(id uint32) (*loadbalancer.L3n4AddrID, error)

GetID returns the L3n4AddrID that belongs to the given id.

func LookupBackendID

func LookupBackendID(l3n4Addr loadbalancer.L3n4Addr) (loadbalancer.BackendID, error)

LookupBackendID looks up already allocated backend ID for the given backend addr. If such cannot be found, returns an error.

func RestoreBackendID

func RestoreBackendID(l3n4Addr loadbalancer.L3n4Addr, id loadbalancer.BackendID) error

RestoreBackendID tries to restore the given local ID for the given backend.

If ID cannot be restored (ID already taken), returns an error.

func RestoreID

func RestoreID(l3n4Addr loadbalancer.L3n4Addr, baseID uint32) (*loadbalancer.L3n4AddrID, error)

RestoreID restores previously used service ID

Types

type IDAllocator

type IDAllocator struct {
	// Protects entitiesID, entities, nextID and maxID
	lock.RWMutex
	// contains filtered or unexported fields
}

IDAllocator contains an internal state of the ID allocator.

func NewIDAllocator

func NewIDAllocator(nextID uint32, maxID uint32) *IDAllocator

NewIDAllocator creates a new ID allocator instance.

type LBMap

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

LBMap is the interface describing methods for manipulating service maps.

type Service

type Service struct {
	lock.RWMutex
	// contains filtered or unexported fields
}

Service is a service handler. Its main responsibility is to reflect service-related changes into BPF maps used by datapath BPF programs. The changes can be triggered either by k8s_watcher or directly by API calls to the /services endpoint.

func NewService

func NewService(monitorNotify monitorNotify) *Service

NewService creates a new instance of the service handler.

func (*Service) DeleteService

func (s *Service) DeleteService(frontend lb.L3n4Addr) (bool, error)

DeleteService removes the given service.

func (*Service) DeleteServiceByID

func (s *Service) DeleteServiceByID(id lb.ServiceID) (bool, error)

DeleteServiceByID removes a service identified by the given ID.

func (*Service) GetCurrentTs

func (s *Service) GetCurrentTs() time.Time

func (*Service) GetDeepCopyServiceByID

func (s *Service) GetDeepCopyServiceByID(id lb.ServiceID) (*lb.SVC, bool)

GetDeepCopyServiceByID returns a deep-copy of a service identified with the given ID.

If a service cannot be found, returns false.

func (*Service) GetDeepCopyServices

func (s *Service) GetDeepCopyServices() []*lb.SVC

GetDeepCopyServices returns a deep-copy of all installed services.

func (*Service) GetLastUpdatedTs

func (s *Service) GetLastUpdatedTs() time.Time

func (*Service) GetServiceNameByAddr

func (s *Service) GetServiceNameByAddr(addr lb.L3n4Addr) (string, string, bool)

GetServiceNameByAddr returns namespace and name of the service with a given L3n4Addr. The third return value is set to true if and only if the service is found in the map.

func (*Service) InitMaps

func (s *Service) InitMaps(ipv6, ipv4, sockMaps, restore bool) error

InitMaps opens or creates BPF maps used by services.

If restore is set to false, entries of the maps are removed.

func (*Service) RestoreServices

func (s *Service) RestoreServices() error

RestoreServices restores services from BPF maps.

It first restores all the service entries, followed by backend entries. In the process, it deletes any duplicate backend entries that were leaked, and are not referenced by any service entries.

The method should be called once before establishing a connectivity to kube-apiserver.

func (*Service) SyncWithK8sFinished

func (s *Service) SyncWithK8sFinished() error

SyncWithK8sFinished removes services which we haven't heard about during a sync period of cilium-agent's k8s service cache.

The removal is based on an assumption that during the sync period UpsertService() is going to be called for each alive service.

func (*Service) UpsertService

func (s *Service) UpsertService(params *lb.SVC) (bool, lb.ID, error)

UpsertService inserts or updates the given service.

The first return value is true if the service hasn't existed before.