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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:11111111111111111@lab.redistogo.com:9254/"] ||= "redis://heroku_username:heroku_password@host:9254/"
uri = URI.parse(ENV["redis://redistogo:1111111111111111@lab.redistogo.com: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:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@lab.redistogo.com: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

Sasha
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3 Answers3

40

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.
Kevin Bedell
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  • yes ive checked using the command you said above and my url is matching. did you have any other initialization for redis? unfortunately i still get the error Errno::ECONNREFUSED (Connection refused - Unable to connect to Redis on 127.0.0.1:6379): – Sasha May 19 '12 at 08:17
  • i much appreciate your help = ) – Sasha May 19 '12 at 09:09
  • Remember to add before_fork and after_fork hooks if you are using unicorn. https://devcenter.heroku.com/articles/rails-unicorn#caveats Also, Redis To Go docs: http://redistogo.com/documentation/resque – Rafael Oliveira Aug 28 '13 at 20:41
  • For me, i had to do `heroku labs:enable user-env-compile -a myapp` to get it to read my ENV vars during deployment. – courtsimas Feb 19 '14 at 17:05
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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

Sasha
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11

I got the same thing, so, basically Sidekiq was not grabbing the REDISCLOUD_URL from vars, it was grabbing REDIS_PROVIDER.

heroku config:set REDIS_PROVIDER=REDISCLOUD_URL

It worked like a charm.

Franzé Jr.
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