raft

package
v0.22.24 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Feb 13, 2023 License: Apache-2.0 Imports: 36 Imported by: 0

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Index

Constants

View Source 
const (
	NewLogEntryType     = 2050
	ErrorResponseType   = 2051
	SuccessResponseType = 2052
	JoinRequestType     = 2053
	RemoveRequestType   = 2054

	HeaderErrorCode = 1000
	IndexHeader     = 1001

	ErrorCodeBadMessage = 1
	ErrorCodeNotLeader  = 2
	ErrorCodeApiError   = 3
	ErrorCodeGeneric    = 4
)

Variables

This section is empty.

Functions

func NewCommandHandler 

func NewCommandHandler(controller *Controller) channel.TypedReceiveHandler

func NewHcLogrusLogger 

func NewHcLogrusLogger() hclog.Logger

func NewJoinHandler 

func NewJoinHandler(controller *Controller) channel.TypedReceiveHandler

func NewRemoveHandler 

func NewRemoveHandler(controller *Controller) channel.TypedReceiveHandler

Types

type BoltDbFsm 

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

func NewFsm 

func NewFsm(dataDir string, decoders command.Decoders, indexTracker IndexTracker, routerDispatchCallback RouterDispatchCallback) *BoltDbFsm

func (*BoltDbFsm) Apply 

func (self *BoltDbFsm) Apply(log *raft.Log) interface{}

func (*BoltDbFsm) GetCurrentState added in v0.22.15 

func (self *BoltDbFsm) GetCurrentState(raft *raft.Raft) (uint64, *raft.Configuration)

func (*BoltDbFsm) GetDb 

func (self *BoltDbFsm) GetDb() boltz.Db

func (*BoltDbFsm) Init 

func (self *BoltDbFsm) Init() error

func (*BoltDbFsm) Restore 

func (self *BoltDbFsm) Restore(snapshot io.ReadCloser) error

func (*BoltDbFsm) Snapshot 

func (self *BoltDbFsm) Snapshot() (raft.FSMSnapshot, error)

func (*BoltDbFsm) StoreConfiguration added in v0.22.15 

func (self *BoltDbFsm) StoreConfiguration(index uint64, configuration raft.Configuration)

type ClusterEvent added in v0.22.23 

type ClusterEvent uint32
const (
	ClusterEventReadOnly         ClusterEvent = 0
	ClusterEventReadWrite        ClusterEvent = 1
	ClusterEventLeadershipGained ClusterEvent = 2
	ClusterEventLeadershipLost   ClusterEvent = 3
)

func (ClusterEvent) String added in v0.22.23 

func (self ClusterEvent) String() string

type ClusterState added in v0.22.23 

type ClusterState uint8

func (ClusterState) IsLeader added in v0.22.23 

func (c ClusterState) IsLeader() bool

func (ClusterState) IsReadWrite added in v0.22.23 

func (c ClusterState) IsReadWrite() bool

func (ClusterState) String added in v0.22.23 

func (c ClusterState) String() string

type Config 

type Config struct {
	Recover               bool
	DataDir               string
	MinClusterSize        uint32
	AdvertiseAddress      transport.Address
	BootstrapMembers      []string
	CommandHandlerOptions struct {
		MaxQueueSize uint16
		MaxWorkers   uint16
	}
}

type Controller 

type Controller struct {
	Id     *identity.TokenId
	Config *Config
	Mesh   mesh.Mesh
	Raft   *raft.Raft
	Fsm    *BoltDbFsm
	// contains filtered or unexported fields
}

Controller manages RAFT related state and operations

func NewController 

func NewController(id *identity.TokenId, version versions.VersionProvider, config *Config, metricsRegistry metrics.Registry, migrationMgr MigrationManager, routerDispatchCallback RouterDispatchCallback) *Controller

func (*Controller) ApplyEncodedCommand 

func (self *Controller) ApplyEncodedCommand(encoded []byte) (uint64, error)

ApplyEncodedCommand applies the command to the RAFT distributed log

func (*Controller) ApplyWithTimeout 

func (self *Controller) ApplyWithTimeout(log []byte, timeout time.Duration) (interface{}, uint64, error)

ApplyWithTimeout applies the given command to the RAFT distributed log with the given timeout

func (*Controller) Bootstrap added in v0.22.4 

func (self *Controller) Bootstrap() error

func (*Controller) CtrlAddresses added in v0.22.15 

func (self *Controller) CtrlAddresses() (uint64, []string)

func (*Controller) Dispatch 

func (self *Controller) Dispatch(cmd command.Command) error

Dispatch dispatches the given command to the current leader. If the current node is the leader, the command will be applied and the result returned

func (*Controller) GetDb 

func (self *Controller) GetDb() boltz.Db

GetDb returns the DB instance

func (*Controller) GetLeaderAddr 

func (self *Controller) GetLeaderAddr() string

GetLeaderAddr returns the current leader address, which may be blank if there is no leader currently

func (*Controller) GetMesh 

func (self *Controller) GetMesh() mesh.Mesh

GetMesh returns the related Mesh instance

func (*Controller) GetRaft 

func (self *Controller) GetRaft() *raft.Raft

GetRaft returns the managed raft instance

func (*Controller) HandleJoin 

func (self *Controller) HandleJoin(req *JoinRequest) error

func (*Controller) HandleJoinAsLeader 

func (self *Controller) HandleJoinAsLeader(req *JoinRequest) error

func (*Controller) HandleRemove 

func (self *Controller) HandleRemove(req *RemoveRequest) error

func (*Controller) HandleRemoveAsLeader 

func (self *Controller) HandleRemoveAsLeader(req *RemoveRequest) error

func (*Controller) Init 

func (self *Controller) Init() error

Init sets up the Mesh and Raft instances

func (*Controller) IsDistributed added in v0.22.23 

func (self *Controller) IsDistributed() bool

func (*Controller) IsLeader 

func (self *Controller) IsLeader() bool

IsLeader returns true if the current node is the RAFT leader

func (*Controller) IsLeaderOrLeaderless added in v0.22.7 

func (self *Controller) IsLeaderOrLeaderless() bool

func (*Controller) IsReadOnlyMode added in v0.22.23 

func (self *Controller) IsReadOnlyMode() bool

func (*Controller) Join 

func (self *Controller) Join(req *JoinRequest) error

Join adds the given node to the raft cluster

func (*Controller) ListMembers 

func (self *Controller) ListMembers() ([]*Member, error)

func (*Controller) ObserveLeaderChanges added in v0.22.23 

func (self *Controller) ObserveLeaderChanges()

func (*Controller) RegisterClusterEventHandler added in v0.22.23 

func (self *Controller) RegisterClusterEventHandler(f func(event ClusterEvent, state ClusterState))

func (*Controller) RemoveServer 

func (self *Controller) RemoveServer(id string) error

RemoveServer removes the node specified by the given id from the raft cluster

type IndexTracker added in v0.19.54 

type IndexTracker interface {
	Index() uint64
	WaitForIndex(index uint64, deadline time.Time) error
	NotifyOfIndex(index uint64)
}

func NewIndexTracker added in v0.19.54 

func NewIndexTracker() IndexTracker

type JoinRequest 

type JoinRequest struct {
	Addr    string
	Id      string
	IsVoter bool
}

func (*JoinRequest) Decode 

func (self *JoinRequest) Decode(msg *channel.Message) error

func (*JoinRequest) Encode 

func (self *JoinRequest) Encode() (*channel.Message, error)

type Member 

type Member struct {
	Id        string
	Addr      string
	Voter     bool
	Leader    bool
	Version   string
	Connected bool
}

type MemberModel 

type MemberModel interface {
	// ListMembers returns the current set of raft members
	ListMembers() ([]*Member, error)
	// HandleJoin adds a node to the raft cluster
	HandleJoin(req *JoinRequest) error
	// HandleRemove removes a node from the raft cluster
	HandleRemove(req *RemoveRequest) error
}

MemberModel presents information about and operations on RAFT membership

type MigrationManager added in v0.22.4 

type MigrationManager interface {
	TryInitializeRaftFromBoltDb() error
	InitializeRaftFromBoltDb(srcDb string) error
}

type RemoveRequest 

type RemoveRequest struct {
	Id string
}

func (*RemoveRequest) Decode 

func (self *RemoveRequest) Decode(msg *channel.Message) error

func (*RemoveRequest) Encode 

func (self *RemoveRequest) Encode() (*channel.Message, error)

type RouterDispatchCallback added in v0.22.15 

type RouterDispatchCallback func(*raft.Configuration) error

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