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raft's Introduction

说明

非拜占庭节点的分布式共识算法Raft的python实现。

Raft官网:https://raft.github.io/

raft

整体架构

文件说明

  • node.py, log.py为raft核心代码
  • node.py 实现raft的节点消息收发、角色转换等功能
  • log.py 实现具体的日志存储
  • rpc.py 实现具体消息编码和转发
  • master.py 控制面中心节点, 进行group创建和管理
  • slave.py 每个server上部署的控制面节点

test

环境:windows 10系统 单机

测试步骤

  1. 运行 python -m raft.master, 启动master节点
  2. 运行 python -m raft.slave, 启动slave节点
  3. 运行 python -m test.test_master param
    • param: create_group, create一个raft group
    • param: stop_group, 安全终止 一个raft group
    • param: stop_master, 安全终止master
  4. 运行 python -m test.test_slave param
    • param: stop_slave, 安全终止slave
  5. 运行 python -m test.client, 用户写入log

结果说明

  • data/master, master存储的数据
  • data/slvae, slave存储的数据
  • data/node
    • .log 各node交互过程监控数据, 可以在git bash中用tail -f filename.log查看
    • persistent.json, node持久化数据
    • log.json, 存储的日志

raft's People

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raft's Issues

append_entries rule 4的疑问

append_entries函数当实现“append_entries rule 4”时,为什么没有判断prev_log_index和对应log entry 内容的一致性呢?term一致不能等同于log index一致吧?

关于redirect

在redirect 中
if data['dst_id'] != self.id:
logging.info('redirect: to ' + data['dst_id'])
# logging.info('redirec to leader')
self.send(data, self.peers[data['dst_id']])
return None
在那个情况下出现

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