RedisWithFailover

Simple wrapper around Redis Client that attempts each operation on a set of backup redis servers before giving up. Can be used with sidekiq to ensure clients can always enqueue to at least one of the provided Redis servers.

Installation

Add this line to your application's Gemfile:

gem 'redis_with_failover'

And then execute:

$ bundle

Or install it yourself as:

$ gem install redis_with_failover

Usage

redis = RedisWithFailover::Client.new(servers: [
            Redis.new(url: "redis://127.0.0.1:6379"),
            Redis.new(url: "redis://127.0.0.1:6380"),
            Redis.new(url: "redis://127.0.0.1:6381")])

redis.set("key", "value")

An optional proc can be defined, which will be called when a failover occurs:

redis = RedisWithFailover::Client.new(servers: [
            Redis.new(url: "redis://127.0.0.1:6379"),
            Redis.new(url: "redis://127.0.0.1:6380"),
            Redis.new(url: "redis://127.0.0.1:6381")]) do |failed_redis, error|

   Rails.logger.warn("Redis command raised #{error.class} #{error.message} on #{failed_redis.inspect}, failing over to the next one")
end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request