deploying redis to heroku unable to connect

Question

ive been trying to get resque to work with heroku. i can successfully get it to work in development mode, however when i try pushing to heroku i get

Errno::ECONNREFUSED (Connection refused - Unable to connect to Redis on 127.0.0.1:6379):

i then read and followed http://blog.redistogo.com/2010/07/26/resque-with-redis-to-go/

i put the configurations listed in the site but got the following error

SocketError (getaddrinfo: nodename nor servname provided, or not known):

i put in my initializers/resque.rb

Resque.after_fork = Proc.new { ActiveRecord::Base.establish_connection }

ENV["redis://redistogo:[email protected]:9254/"] ||= "redis://heroku_username:heroku_password@host:9254/"
uri = URI.parse(ENV["redis://redistogo:[email protected]:9254/"])
Resque.redis = Redis.new(:host => uri.host, :port => uri.port, :password => uri.password)

however it throws the error mentioned above. on my dev mode now, i get the error as well.

i tried using my heroku username (im using the add on from heroku), putting my password to heroku, and changing the port to 9254. however i keep getting the socket error now. what am i doing wrong?

help would be much appreciated. thank you

UPDATE.

@kevin

i tried

uri = URI.parse(ENV["my_url_string"] || "redis://localhost:9254/" )
REDIS = Redis.new(:host => uri.host, :port => uri.port, :password => uri.password)

in a initializer/redis.rb as well but i get the following error

Errno::ECONNREFUSED (Connection refused - Unable to connect to Redis on 127.0.0.1:6379):

are the numbers in the error, ie 127.0.0.1:6379 significant? ive checked my redis gui app and also from heroku config that my port number is 9254

REDISTOGO_URL       => redis://redistogo:[email protected]:9254/

did you have any other configuration settings? thanks for helping!

FINAL UPDATE.

i fixed it. i can't believe it! my complete solution is

uri = URI.parse(ENV["REDISTOGO_URL"])
REDIS = Redis.new(:host => uri.host, :port => uri.port, :password => uri.password)
Resque.redis = REDIS

verbatim. it works without explicitly setting the url because i guess heroku tries to set it up for me already

Answer 1

For my setup I have /config/initializers/redis.rb with these lines:

uri = URI.parse(ENV["REDISTOGO_URL"] || "redis://localhost:6379/" )
REDIS = Redis.new(:host => uri.host, :port => uri.port, :password => uri.password)

My REDISTOGO_URL is defined in my heroku configuration. You should be able to validate that by typing:

heroku config --app my_app

You'll see in the output the value for REDISTOGO_URL

You should copy your REDISTOGO_URL directly from Redis To Go. You find it in by going to the instance in heroku and clicking on Add Ons -> Redis To Go.

Here are a couple pointers:

1. Verify you have your REDIS_TO_GO URL in your heroku config from the command line like I've demonstrated above.
2. Verify the REDIS_TO_GO URL is identical to the one assigned to that instance in the Add Ons -> Redis To Go config.