require "redis"
require "json"

SENTINELS = [{ host: "192.168.99.100", port: 26379 },
             { host: "192.168.99.101", port: 26379 },
         	 { host: "192.168.99.102", port: 26379 }]

redis = Redis.new(url: "redis://master01/", sentinels: SENTINELS, role: :master)



redis.set "foo", [1, 2, 3].to_json
# => OK

JSON.parse(redis.get("foo"))