Byraft

Byraft is an implementation of Raft consensus algorithm in Ruby using gRPC.

Install

gem install grpc

Usage

script/byraft # run server
script/client # request as client

Spec

raft.proto

Example

Configuration

• election timeout : between 1 and 2 sec
• heartbeat period : 0.1 sec
• Write committed commands in log/log-node-<id>.txt
• Nodes
  • #1 on localhost:50051
  • #2 on localhost:50052
  • ...

Options

• -n <number of nodes> : default is 3
• -c <command> : request command as client
• -v : set logger level to DEBUG, otherwise INFO

Run servers in different terminals.

script/example 1 -n 5 # terminal 1
script/example 2 -n 5 # terminal 2
script/example 3 -n 5 # terminal 3
script/example 4 -n 5 # terminal 4
script/example 5 -n 5 # terminal 5

Run client to append log.

script/example 1 -c 'RUN COMMAND' # another terminal

Test

bundle install
bundle exec rspec

TODO

• Liveness in the face of Network Faults
• Dynamic Membership

Reference

paper