redis configuration for redis-sentinel and redis-session-store

redis.rb

######### redis configuration #########

### redis sentinel und sidekiq
# https://github.com/flyerhzm/redis-sentinel
# http://tom.meinlschmidt.org/2013/12/20/redis-sentinel-with-ruby-on-rails/

sentinels = {
  development:
    [
      { host: "127.0.0.1", port: 6379 }
    ],
  preview:
    [
      { host: "x.x.x.41", port: 26379 },
      { host: "x.x.x.41", port: 26380 },
      { host: "x.x.x.30", port: 26379}
    ]
}

redis_connection = proc {
  Redis.current = Redis.new(master_name: "mymaster", sentinels: sentinels[Rails.env], db: APP_CONFIG[:redis][:db])
}
redis = ConnectionPool.new(size: 10, &redis_connection)

Sidekiq.configure_server do |config|
  config.redis = redis
end

Sidekiq.configure_client do |config|
  config.redis = redis
end

### redis session store
# https://github.com/roidrage/redis-session-store

Ace::Application.config.session_store :redis_session_store, {
  key: APP_CONFIG[:session][:redis][:key],
  serializer: APP_CONFIG[:session][:redis][:serializer].to_sym, #hybrid
  on_redis_down: -> (*a) { logger.error("Redis down! #{a.inspect}") }, #fix me!
  on_session_load_error: -> (*a) { logger.error("Redis Session load error! #{a.inspect}") }, #fix me!
  redis: {
    db: APP_CONFIG[:session][:redis][:db],
    expire_after: "#{APP_CONFIG[:session][:redis][:expire_after]}".to_i.minutes, # 120.minutes
    key_prefix: APP_CONFIG[:session][:redis][:key_prefix], # 'ace:'
    host: APP_CONFIG[:session][:redis][:host], # '127.0.0.1'
    port: APP_CONFIG[:session][:redis][:port], # 6379
  }
}