raft

package
v0.31.1 Latest Latest
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 Go to latest Published: Dec 7, 2023 License: Apache-2.0 Imports: 39 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func NewHcLogrusLogger 

func NewHcLogrusLogger() hclog.Logger

Types

type BoltDbFsm 

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

func NewFsm 

func NewFsm(dataDir string, decoders command.Decoders, indexTracker IndexTracker, eventDispatcher event2.Dispatcher) *BoltDbFsm

func (*BoltDbFsm) Apply 

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

func (*BoltDbFsm) GetCurrentState 

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 

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

type ClusterEvent 

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

func (ClusterEvent) String 

func (self ClusterEvent) String() string

type ClusterState 

type ClusterState uint8

func (ClusterState) IsLeader 

func (c ClusterState) IsLeader() bool

func (ClusterState) IsReadWrite 

func (c ClusterState) IsReadWrite() bool

func (ClusterState) String 

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
	}

	SnapshotInterval  *time.Duration
	SnapshotThreshold *uint32
	TrailingLogs      *uint32
	MaxAppendEntries  *uint32

	ElectionTimeout    *time.Duration
	CommitTimeout      *time.Duration
	HeartbeatTimeout   *time.Duration
	LeaderLeaseTimeout *time.Duration

	LogLevel *string
	Logger   hclog.Logger
}

func (*Config) Configure 

func (self *Config) Configure(conf *raft.Config)

func (*Config) ConfigureReloadable 

func (self *Config) ConfigureReloadable(conf *raft.ReloadableConfig)

type Controller 

type Controller struct {
	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(env Env, migrationMgr MigrationManager) *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 

func (self *Controller) Bootstrap() error

func (*Controller) ConfigureMeshHandlers 

func (self *Controller) ConfigureMeshHandlers(bindHandler channel.BindHandler)

func (*Controller) CtrlAddresses 

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) GetCloseNotify 

func (self *Controller) GetCloseNotify() <-chan struct{}

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) GetMetricsRegistry 

func (self *Controller) GetMetricsRegistry() metrics.Registry

func (*Controller) GetPeers 

func (self *Controller) GetPeers() map[string]channel.Channel

func (*Controller) GetRaft 

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

GetRaft returns the managed raft instance

func (*Controller) HandleAddPeer 

func (self *Controller) HandleAddPeer(req *cmd_pb.AddPeerRequest) error

func (*Controller) HandleAddPeerAsLeader 

func (self *Controller) HandleAddPeerAsLeader(req *cmd_pb.AddPeerRequest) error

func (*Controller) HandleRemovePeer 

func (self *Controller) HandleRemovePeer(req *cmd_pb.RemovePeerRequest) error

func (*Controller) HandleRemovePeerAsLeader 

func (self *Controller) HandleRemovePeerAsLeader(req *cmd_pb.RemovePeerRequest) error

func (*Controller) HandleTransferLeadership 

func (self *Controller) HandleTransferLeadership(req *cmd_pb.TransferLeadershipRequest) error

func (*Controller) HandleTransferLeadershipAsLeader 

func (self *Controller) HandleTransferLeadershipAsLeader(req *cmd_pb.TransferLeadershipRequest) error

func (*Controller) Init 

func (self *Controller) Init() error

Init sets up the Mesh and Raft instances

func (*Controller) IsDistributed 

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 

func (self *Controller) IsLeaderOrLeaderless() bool

func (*Controller) IsReadOnlyMode 

func (self *Controller) IsReadOnlyMode() bool

func (*Controller) Join 

func (self *Controller) Join(req *cmd_pb.AddPeerRequest) error

Join adds the given node to the raft cluster

func (*Controller) ListMembers 

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

func (*Controller) ObserveLeaderChanges 

func (self *Controller) ObserveLeaderChanges()

func (*Controller) RegisterClusterEventHandler 

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

func (*Controller) RenderJsonConfig 

func (self *Controller) RenderJsonConfig() (string, error)

type Env 

type Env interface {
	GetId() *identity.TokenId
	GetVersionProvider() versions.VersionProvider
	GetCommandRateLimiterConfig() command.RateLimiterConfig
	GetRaftConfig() *Config
	GetMetricsRegistry() metrics.Registry
	GetEventDispatcher() event.Dispatcher
	GetCloseNotify() <-chan struct{}
}

type IndexTracker 

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

func NewIndexTracker 

func NewIndexTracker() IndexTracker

type Member 

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

type MigrationManager 

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

type RouterDispatchCallback 

type RouterDispatchCallback func(*raft.Configuration) error

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