rafthttp

Documentation

Index

• Constants
• Variables
• func NewHandler(r Raft, cid types.ID) http.Handler
• type Pausable
• type Peer
• type Raft
• type Transporter
  • func NewTransporter(rt http.RoundTripper, id, cid types.ID, r Raft, errorc chan error, ...) Transporter

Constants

const (
	DialTimeout = time.Second
	// ConnRead/WriteTimeout is the i/o timeout set on each connection rafthttp pkg creates.
	// A 5 seconds timeout is good enough for recycling bad connections. Or we have to wait for
	// tcp keepalive failing to detect a bad connection, which is at minutes level.
	// For long term streaming connections, rafthttp pkg sends application level linkHeartbeat
	// to keep the connection alive.
	// For short term pipeline connections, the connection MUST be killed to avoid it being
	// put back to http pkg connection pool.
	ConnReadTimeout  = 5 * time.Second
	ConnWriteTimeout = 5 * time.Second
)

const (
	ConnReadLimitByte = 64 * 1024
)

Variables

var (
	RaftPrefix       = "/raft"
	ProbingPrefix    = path.Join(RaftPrefix, "probing")
	RaftStreamPrefix = path.Join(RaftPrefix, "stream")
)

Functions

func NewHandler

func NewHandler(r Raft, cid types.ID) http.Handler

Types

type Pausable

type Pausable interface {
	Pause()
	Resume()
}

type Peer

type Peer interface {
	// Send sends the message to the remote peer. The function is non-blocking
	// and has no promise that the message will be received by the remote.
	// When it fails to send message out, it will report the status to underlying
	// raft.
	Send(m raftpb.Message)
	// Update updates the urls of remote peer.
	Update(urls types.URLs)

	// Stop performs any necessary finalization and terminates the peer
	// elegantly.
	Stop()
	// contains filtered or unexported methods
}

type Raft

type Raft interface {
	Process(ctx context.Context, m raftpb.Message) error
	IsIDRemoved(id uint64) bool
	ReportUnreachable(id uint64)
	ReportSnapshot(id uint64, status raft.SnapshotStatus)
}

type Transporter

type Transporter interface {
	// Handler returns the HTTP handler of the transporter.
	// A transporter HTTP handler handles the HTTP requests
	// from remote peers.
	// The handler MUST be used to handle RaftPrefix(/raft)
	// endpoint.
	Handler() http.Handler
	// Send sends out the given messages to the remote peers.
	// Each message has a To field, which is an id that maps
	// to an existing peer in the transport.
	// If the id cannot be found in the transport, the message
	// will be ignored.
	Send(m []raftpb.Message)
	// AddRemote adds a remote with given peer urls into the transport.
	// A remote helps newly joined member to catch up the progress of cluster,
	// and will not be used after that.
	// It is the caller's responsibility to ensure the urls are all valid,
	// or it panics.
	AddRemote(id types.ID, urls []string)
	// AddPeer adds a peer with given peer urls into the transport.
	// It is the caller's responsibility to ensure the urls are all valid,
	// or it panics.
	// Peer urls are used to connect to the remote peer.
	AddPeer(id types.ID, urls []string)
	// RemovePeer removes the peer with given id.
	RemovePeer(id types.ID)
	// RemoveAllPeers removes all the existing peers in the transport.
	RemoveAllPeers()
	// UpdatePeer updates the peer urls of the peer with the given id.
	// It is the caller's responsibility to ensure the urls are all valid,
	// or it panics.
	UpdatePeer(id types.ID, urls []string)
	// Stop closes the connections and stops the transporter.
	Stop()
}

func NewTransporter

func NewTransporter(rt http.RoundTripper, id, cid types.ID, r Raft, errorc chan error, ss *stats.ServerStats, ls *stats.LeaderStats) Transporter