raftserver

package module

v0.0.0-...-864489a Latest Latest Go to latest Published: Jun 17, 2016 License: Apache-2.0 Imports: 9 Imported by: 0

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Repository

github.com/kkdai/raftserver

Links

Open Source Insights

README ¶

RaftServer: A RPC Server implement base on Raft Paper in Golang

What is Raft

Raft is a consensus algorithm that is designed to be easy to understand. It's equivalent to Paxos in fault-tolerance and performance. The difference is that it's decomposed into relatively independent subproblems, and it cleanly addresses all major pieces needed for practical systems. We hope Raft will make consensus available to a wider audience, and that this wider audience will be able to develop a variety of higher quality consensus-based systems than are available today. (quote from here)

Installation and Usage

Install

go get github.com/kkdai/raftserver

Usage

	//Start three raft servers
	srv1 := StartClusterServers("127.0.0.1:1230", 1, []string{"127.0.0.1:1231", "127.0.0.1:1232"})
	srv2 := StartClusterServers("127.0.0.1:1231", 2, []string{"127.0.0.1:1230", "127.0.0.1:1232"})
	srv3 := StartClusterServers("127.0.0.1:1232", 3, []string{"127.0.0.1:1231", "127.0.0.1:1230"})

	//Need sleep a while for leader election.
	time.Sleep(time.Second * 2)

Inspired By

In Search of an Understandable Consensus Algorithm

Project52

It is one of my project 52.

License

etcd is under the Apache 2.0 license. See the LICENSE file for details.

Documentation ¶

Overview ¶

Package raftserver provides simple rpc server with K/V value.

Index ¶

Constants
func DPrintf(format string, a ...interface{}) (n int, err error)
type AEParam
type AEReply
type Clerk
- func MakeClerk(server string) *Clerk
- func (ck *Clerk) Get(key string) string
- func (ck *Clerk) Put(key string, value string)
type Err
type GetArgs
type GetReply
type KVRaft
- func NewKVRaft(id int, srvList []string) *KVRaft
- func StartClusterServers(rpcPort string, myID int, cluster []string) *KVRaft
- func StartServer(rpcPort string, myID int) *KVRaft
- func (kv *KVRaft) AppendEntries(args *AEParam, reply *AEReply) error
- func (kv *KVRaft) RequestVote(args *RVParam, reply *RVReply) error
type Log
type LogData
- func NewLogData() *LogData
- func (l *LogData) Append(in []Log) error
- func (l *LogData) ContainIndex(term int, index int) (bool, int)
- func (l *LogData) Get(index int) (Log, error)
- func (l *LogData) Length() int
- func (l *LogData) TrimRight(index int)
type PutArgs
type PutReply
type RVParam
type RVReply
type Role

Constants ¶

View Source

const (
	OK           = "OK"
	ErrNoKey     = "ErrNoKey"
	InvalidParam = "Invalid Parameter"
)

View Source

const (
	ElectionTimeOut time.Duration = 150 * time.Millisecond
)

Variables ¶

This section is empty.

Functions ¶

func DPrintf ¶

func DPrintf(format string, a ...interface{}) (n int, err error)

Types ¶

type AEParam ¶

type AEParam struct {
	Term         int
	LeaderID     int
	PrevLogIndex int
	PrevLogTerm  int
	Entries      []string
	LeaderCommit int
}

AEParam : For AppendEntries

type AEReply ¶

type AEReply struct {
	Term    int
	Success bool
}

AEReply :

type Clerk ¶

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

func MakeClerk ¶

func MakeClerk(server string) *Clerk

func (*Clerk) Get ¶

func (ck *Clerk) Get(key string) string

Get :

func (*Clerk) Put ¶

func (ck *Clerk) Put(key string, value string)

Put :

type Err ¶

type Err string

type GetArgs ¶

type GetArgs struct {
	Key string
}

type GetReply ¶

type GetReply struct {
	Err   Err
	Value string
}

type KVRaft ¶

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

func NewKVRaft ¶

func NewKVRaft(id int, srvList []string) *KVRaft

NewKVRaft :

func StartClusterServers ¶

func StartClusterServers(rpcPort string, myID int, cluster []string) *KVRaft

StartClusterServers :

func StartServer ¶

func StartServer(rpcPort string, myID int) *KVRaft

StartServer :

func (*KVRaft) AppendEntries ¶

func (kv *KVRaft) AppendEntries(args *AEParam, reply *AEReply) error

AppendEntries :RPC call to server to update Log Entry

func (*KVRaft) RequestVote ¶

func (kv *KVRaft) RequestVote(args *RVParam, reply *RVReply) error

RequestVote :

type Log ¶

type Log struct {
	Term int
	Data string
}

type LogData ¶

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

func NewLogData ¶

func NewLogData() *LogData

func (*LogData) Append ¶

func (l *LogData) Append(in []Log) error

Append :Append data to last if not exist

func (*LogData) ContainIndex ¶

func (l *LogData) ContainIndex(term int, index int) (bool, int)

ContainIndex :Reply true if term and index exist in current log, return index if exist

func (*LogData) Get ¶

func (l *LogData) Get(index int) (Log, error)

Get :Get data by index

func (*LogData) Length ¶

func (l *LogData) Length() int

Length :Return the data length

func (*LogData) TrimRight ¶

func (l *LogData) TrimRight(index int)

Get :Get data by index TrimRight :Trim data after specfic index

type PutArgs ¶

type PutArgs struct {
	Key   string
	Value string
}

type PutReply ¶

type PutReply struct {
	Err           Err
	PreviousValue string
}

type RVParam ¶

type RVParam struct {
	Term         int
	CandidateId  int
	LastLogIndex int
	LastLogTerm  int
}

RVParam

type RVReply ¶

type RVReply struct {
	Term        int
	VoteGranted bool
}

RVReply

type Role ¶

type Role int

const (
	Follower Role = iota + 1
	Candidate
	Leader
)

Source Files ¶

View all Source files

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