中文简介

simple redis server base etcd raft lib

First start a single-member cluster of raftexample:

raft-redis --id 1 --cluster http://127.0.0.1:12379 --port 6389

Next, store a value ("hello") to a key ("key") use redis-cli:

redis-cli -p 6389 set key hello

Finally, retrieve the stored key:

redis-cli -p 6389 get key

First install goreman, which manages Procfile-based applications.

The Procfile script will set up a local example cluster. Start it with:

goreman start

This will bring up three raft-redis instances.

Nodes can be added to or removed from a running cluster using redis command-line client.

For example, suppose we have a 3-node cluster that was started with the commands:

raftexample --id 1 --cluster http://127.0.0.1:12379,http://127.0.0.1:22379,http://127.0.0.1:32379 --port 6389
raftexample --id 2 --cluster http://127.0.0.1:12379,http://127.0.0.1:22379,http://127.0.0.1:32379 --port 6399
raftexample --id 3 --cluster http://127.0.0.1:12379,http://127.0.0.1:22379,http://127.0.0.1:32379 --port 6169

A fourth node with ID 4 can be added by useing a addnode request :

redis-cli -p 6389 addnode 4 http://127.0.0.1:42379

Then the new node can be started as the others were, using the --join option:

raft-redis --id 4 --cluster http://127.0.0.1:12379,http://127.0.0.1:22379,http://127.0.0.1:32379,http://127.0.0.1:42379 --port 6059 --join

The new node should join the cluster and be able to service redis client requests.

We can remove a node using a removenode request:

redis-cli -p 6389 removenode 4 http://127.0.0.1:42379

Node 3 should shut itself down once the cluster has processed this request.

etcd-raft

go-redis-server