Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED) - Wercker : <p>I'm using wercker for running specs of my rails app. I have problem with setting up redis on wercker. In my rails app I have <code>redis.rb</code> which looks like this:</p>

<pre><code>if Figaro.env.rediscloud_url
  uri = URI.parse(Figaro.env.rediscloud_url)
  REDIS = Redis.new(host: uri.host, port: uri.port, password: uri.password)
elsif ENV['WERCKER_REDIS_HOST'] &amp;&amp; ENV['WERCKER_REDIS_PORT']
  REDIS = Redis.new(host: ENV['WERCKER_REDIS_HOST'], port: ENV['WERCKER_REDIS_PORT'])
else
  REDIS = Redis.new
end
</code></pre>

<p>In wercker I set <code>WERCKER_REDIS_HOST</code> enviromental variable to: <code>127.0.0.1</code> and <code>WERCKER_REDIS_PORT</code> to <code>6379</code></p>

<p>When I start my specs it returns:</p>

<pre><code> Redis::CannotConnectError:
Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED)
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:332:in `rescue in establish_connection'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:318:in `establish_connection'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:94:in `block in connect'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:280:in `with_reconnect'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:93:in `connect'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:351:in `ensure_connected'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:208:in `block in process'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:293:in `logging'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:207:in `process'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:178:in `call_pipelined'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:150:in `block in call_pipeline'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:280:in `with_reconnect'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/client.rb:148:in `call_pipeline'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis.rb:2245:in `block in multi'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis.rb:57:in `block in synchronize'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis.rb:57:in `synchronize'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis.rb:2237:in `multi'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/sidekiq-4.1.0/lib/sidekiq/client.rb:171:in `block in raw_push'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/connection_pool-2.2.0/lib/connection_pool.rb:64:in `block (2 levels) in with'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/connection_pool-2.2.0/lib/connection_pool.rb:63:in `handle_interrupt'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/connection_pool-2.2.0/lib/connection_pool.rb:63:in `block in with'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/connection_pool-2.2.0/lib/connection_pool.rb:60:in `handle_interrupt'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/connection_pool-2.2.0/lib/connection_pool.rb:60:in `with'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/sidekiq-4.1.0/lib/sidekiq/client.rb:170:in `raw_push'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/sidekiq-4.1.0/lib/sidekiq/client.rb:67:in `push'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/sidekiq-4.1.0/lib/sidekiq/worker.rb:115:in `client_push'
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/sidekiq-4.1.0/lib/sidekiq/extensions/generic_proxy.rb:19:in `method_missing'
# ./app/models/user.rb:26:in `send_reset_password_instructions'
# ./spec/models/user_spec.rb:43:in `block (3 levels) in &lt;top (required)&gt;'
# ------------------
# --- Caused by: ---
# IO::EINPROGRESSWaitWritable:
# Operation now in progress - connect(2) would block
# /pipeline/cache/bundle-install/ruby/2.3.0/gems/redis-3.2.2/lib/redis/connection/ruby.rb:122:in `connect_addrinfo'
</code></pre>

<p>How can I fix that?</p>
