Resque, Resque Server, on RedisToGo with Heroku

Question

I\'ve been trying to get Resque (with Resque server) & RedisToGo working on heroku (cedar) for awhile now, but I keep running into this error:

Redis::CannotC         


        

Answer 1

I think your Procfile has a typo. Why do you have two web processes? I'd stick with one and use unicorn.

web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb

When using unicorn with resque, you have to define the resque redis connection each time unicorn forks. Here are the relevant files.

config/initializers/redis.rb

uri = URI.parse(ENV["REDIS_WORKER"])
REDIS_WORKER = Redis.new(host: uri.host, port: uri.port, password: uri.password)

config/initializers/resque.rb

Resque.redis = REDIS_WORKER

config/unicorn.rb

before_fork do |server, worker|
  if defined?(Resque)
    Resque.redis.quit
    Rails.logger.info("Disconnected from Redis")
  end
end

after_fork do |server, worker|
  if defined?(Resque)
    Resque.redis = REDIS_WORKER
    Rails.logger.info("Connected to Redis")
  end
end

See this gist for the complete unicorn.rb