Can't connect to redis on heroku

Question

I'm using sidekiq with active_job in my rails application. The job currently works but I am unable to get connect to the Redis when deploying to heroku. In heroku I have the RedisToGo addon. When pushing to heroku I get the following error.

error

/app/vendor/bundle/ruby/2.2.0/gems/redis-3.2.1/lib/redis/client.rb:331:in `rescue in establish_connection': Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED) (Redis::CannotConnectError)

config/application.rb

config.after_initialize do
  PasswordAgingJob.perform_later
  SetOffCallJob.perform_later
end

config/initializers/redis.rb

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

config/initializers/active_job.rb

ActiveJob::Base.queue_adapter = :sidekiq

score 25 · Accepted Answer · answered May 21 '15 at 21:45

25

Set REDIS_PROVIDER to the name of the env var with your Redis URL.

Type this: heroku config:set REDIS_PROVIDER=REDISTOGO_URL. Restart.

Explained here: https://github.com/mperham/sidekiq/wiki/Using-Redis#using-an-env-variable

answered May 21 '15 at 21:45

Mike Perham

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I have a feeling a few people land here when they also don't have the right worker set up. Mike, do you happen to know how one configures their heroku app such that a worker is ready to go to run Redis? – karns Jan 22 '20 at 15:22

score 3 · Answer 2 · answered Aug 12 '15 at 23:31

3

Setting REDIS_URL in heroku config help me to resolve:

Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED) (Redis::CannotConnectError)

answered Aug 12 '15 at 23:31

Roman Kiselenko

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I spent weeks trying to figure this out, tried all kind of solution, but it was that simple! THANK YOU! – Rene Chan Apr 19 '19 at 06:38

score 2 · Answer 3 · answered May 21 '15 at 21:09

2

You must set the REDISTOGO_URL on Heroku.

Click on Settings, and then Reveal Config Vars.

answered May 21 '15 at 21:09

B Seven

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It seems that it is not set correctly. Is it possible that it is misspelled? Did you set it manually, or change it? – B Seven May 21 '15 at 21:16
You may need to do `heroku restart`. – B Seven May 21 '15 at 21:17
It was setting using the [heroku guide](https://devcenter.heroku.com/articles/redistogo) – Antarr Byrd May 21 '15 at 21:18

score 0 · Answer 4 · answered Mar 30 '20 at 22:23

0

Setting REDIS_URL to redis://@pike.redistogo.com:10731/ seem to work for me.

answered Mar 30 '20 at 22:23

Prabin Deka

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be careful sharing redis urls – Dennis Hackethal Dec 15 '22 at 06:40

Can't connect to redis on heroku

error

config/application.rb

config/initializers/redis.rb

config/initializers/active_job.rb

4 Answers4