I just deployed a Rails app to Elastic Beanstalk, and every request is giving me a 502 error.
Here's the contents of /var/logs/nginx/error.log
2015/05/20 16:24:25 [warn] 1535#0: conflicting server name "localhost" on 0.0.0.0:80, ignored
2015/05/20 16:27:12 [crit] 1537#0: *20 connect() to unix:///var/run/puma/my_app.sock failed (2: No such file or directory) while connecting to upstream, client: 172.31.51.94, server: _, request: "POST /get HTTP/1.1", upstream: "http://unix:///var/run/puma/my_app.sock:/get", host: "securities-api-prod.elasticbeanstalk.com"
2015/05/20 16:27:17 [crit] 1537#0: *20 connect() to unix:///var/run/puma/my_app.sock failed (2: No such file or directory) while connecting to upstream, client: 172.31.51.94, server: _, request: "POST /get HTTP/1.1", upstream: "http://unix:///var/run/puma/my_app.sock:/get", host: "securities-api-prod.elasticbeanstalk.com"
2015/05/20 16:27:19 [crit] 1537#0: *20 connect() to unix:///var/run/puma/my_app.sock failed (2: No such file or directory) while connecting to upstream, client: 172.31.51.94, server: _, request: "POST /get HTTP/1.1", upstream: "http://unix:///var/run/puma/my_app.sock:/get", host: "securities-api-prod.elasticbeanstalk.com"
2015/05/20 16:27:22 [crit] 1537#0: *16 connect() to unix:///var/run/puma/my_app.sock failed (2: No such file or directory) while connecting to upstream, client: 172.31.44.210, server: _, request: "GET /datapoint?tickers=AAPL&datapoints=Ratings HTTP/1.1", upstream: "http://unix:///var/run/puma/my_app.sock:/datapoint?tickers=AAPL&datapoints=Ratings", host: "securities-api-prod.elasticbeanstalk.com"
2015/05/20 16:27:27 [crit] 1537#0: *20 connect() to unix:///var/run/puma/my_app.sock failed (2: No such file or directory) while connecting to upstream, client: 172.31.51.94, server: _, request: "POST /get HTTP/1.1", upstream: "http://unix:///var/run/puma/my_app.sock:/get", host: "securities-api-prod.elasticbeanstalk.com"
2015/05/20 16:27:32 [crit] 1537#0: *20 connect() to unix:///var/run/puma/my_app.sock failed (2: No such file or directory) while connecting to upstream, client: 172.31.51.94, server: _, request: "POST /get HTTP/1.1", upstream: "http://unix:///var/run/puma/my_app.sock:/get", host: "securities-api-prod.elasticbeanstalk.com"
2015/05/20 16:28:53 [crit] 1537#0: *52 connect() to unix:///var/run/puma/my_app.sock failed (2: No such file or directory) while connecting to upstream, client: 172.31.51.94, server: _, request: "GET /datapoint?tickers=AAPL&datapoints=Ratings HTTP/1.1", upstream: "http://unix:///var/run/puma/my_app.sock:/datapoint?tickers=AAPL&datapoints=Ratings", host: "securities-api-prod.elasticbeanstalk.com"
2015/05/20 16:30:47 [crit] 1537#0: *69 connect() to unix:///var/run/puma/my_app.sock failed (2: No such file or directory) while connecting to upstream, client: 172.31.51.94, server: _, request: "POST /get HTTP/1.1", upstream: "http://unix:///var/run/puma/my_app.sock:/get", host: "securities-api-prod.elasticbeanstalk.com"
I think puma is running -
[ec2-user#ip-172-31-44-135 nginx]$ ps aux | grep puma
root 23299 1.0 0.2 53008 1428 ? Ss 16:38 0:00 su -s /bin/bash -c puma -C /opt/elasticbeanstalk/support/conf/pumaconf.rb webapp
webapp 23314 0.0 2.4 75764 14604 ? Rsl 16:38 0:00 /opt/rubies/ruby-2.1.4/bin/ruby /opt/rubies/ruby-2.1.4/bin/puma -C /opt/elasticbeanstalk/support/conf/pumaconf.rb
ec2-user 23317 0.0 0.1 110284 844 pts/0 S+ 16:38 0:00 grep puma
pumaconf.rb
directory '/var/app/current'
threads 8, 32
workers %x(grep -c processor /proc/cpuinfo)
bind 'unix:///var/run/puma/my_app.sock'
stdout_redirect '/var/log/puma/puma.log', '/var/log/puma/puma.log', true
daemonize false
Anyone know what's going on?
I faced the same error and adding these two lines to config/puma.rb fixed the problem:
bind "unix:///var/run/puma/my_app.sock"
pidfile "/var/run/puma/my_app.sock"
After this step I faced another error to add ENV values, which is very straight forward.
Hope this helps.
Sorry - Super late to the game. But I found this entry when searching for the same error message and could solve it differently.
I am trying to let a Rails 6.1.1 (currently latest and greatest) application run on AWS Beanstalk (Puma with Ruby 2.6), where I got the same error as described in this post: Nginx throwing above connection error / Puma seems not reactive (no entries in puma logs) / When SSHing into the machine it shows Puma is running (initctl status puma -> shows process ID).
After some days of research (and trying all above answers without success) - I switched to Passenger - but still same result. Researching the same problem for Passenger showed the proper solution:
Do not use the gem of the application server in production when you want to use the already provided application server of the AWS platform branch ("Puma with Ruby 2.6..." or "Passenger with Ruby 2.6...") (it somehow collides with the already installed version). Therefore in your Gemfile:
gem 'puma', '~> 5.0', groups: [:development, :test]
respectively:
gem "passenger", ">= 5.3.2", require: "phusion_passenger/rack_handler", groups: [:development, :test]
or use the AWS Beanstalk platform without already installed application server ("Ruby 2.6 running on...)
PS: Seems to be only a solution for higher Rails versions (my old Rails 5.1 app runs perfectly on the "Puma with Ruby 2.6" platform even with the gem "normally" installed.
In my case, this was happening because of a Gem loading error. I was able to reproduce the error by connecting to the server with eb ssh and running pumactl start.
For me, the conflict was with the nio4r gem, although for others it was the puma gem. Setting it to the same version as the Elastic Beanstalk platform's gem fixed the error.
More details here:
https://stackoverflow.com/a/67110462/1852005
and here:
https://forums.aws.amazon.com/thread.jspa?messageID=957426
Changing config.force_ssl = true to false fixed the issue for me.
This line in your logfile means, that you've configured your nginx incorrectly.
upstream: "http://unix:///var/run/puma/my_app.sock:/get"
Actually nginx tries to use unix domain socket as HTTP url.
Can't say exactly what is wrong at your nginx config without it, but you should have something like this:
upstream backend {
server backend1.example.com weight=5;
server 127.0.0.1:8080 max_fails=3 fail_timeout=30s;
server unix:/tmp/backend3;
server backup1.example.com backup;
}
You should also check out this nginx doc http://nginx.org/en/docs/http/ngx_http_upstream_module.html
The AWS doc mandates that puma gem be installed as part of your application.
Add the following to your Gemfile as appropriate:
group :production do
gem 'puma'
end
The error unix:///var/run/puma/my_app.sock failed (2: No such file or directory) will also occur if Elastic Beanstalk cannot detect your Rails application root for whatever reason. In my case, the issue was simply that I was zipping up my Rails application contents inside a subfolder. Instead of creating the zip in the same directory as app, bin, config, db, etc., the application content were being created inside a subfolder called <app_name>.
The only hint was in the Elastic Beanstalk Events section where it had an Informational notification (not warning or error level) which said Gemfile not detected. Custom gems will not be included.
Hope this helps others; took many deployments to figure out this simple problem.
Given you are using Elastic Beanstalk, it starts up puma by running a command very similar to this one (as you can see by running ps):
sudo su -s /bin/bash -c "puma -C /opt/elasticbeanstalk/support/conf/pumaconf.rb webapp"
Try running that command in your eb ssh console. If you get an error like the one in this post:
config/puma.rb:23:in `_load_from': undefined local variable or method `daemonize' for #<Puma::DSL:0x000055596fadb448> (NameError)
you have probably declared Puma 5.x in your Gemfile. The solution would be to use puma < 5.0, as it removed the daemonize method. Note that the configuration Elastic Beanstalk uses is not config/puma.rb but /opt/elasticbeanstalk/support/conf/pumaconf.rb
Add a Procfile
with this content:
web: puma -C /opt/elasticbeanstalk/config/private/pumaconf.rb
Reference:
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/ruby-platform-procfile.html
Check if you're missing any newly added ENV variables.
To add new Environment variables follow:
Elastic Beanstalk >
Environments >
<Your Environment> >
Configuration >
Software >
EDIT
Under Environment properties Add the new ENV variables
I'm developing an application where a user can upload 1-3 images at some point. However, this does not work. When submitting the form, nothing will come through to Unicorn. The only piece of log information I have is this from nginx:
2014/09/24 15:28:05 [error] 7301#0: *23953 readv() failed (104: Connection reset by peer) while reading upstream, client: <my IP>, server: localhost, request: "POST /products HTTP/1.1", upstream: "http://unix:/tmp/<appname>/unicorn.sock:/products", host: "<domain>", referrer: "<domain>/products/new"
Also, my browser will try to load the page for some time, and then show a blank page, with the response header giving a 500.
EDIT: okay, as it seems, rack causes a crash when processing file uploads:
E, [2014-09-24T21:22:33.505511 #18252] ERROR -- : app error: invalid byte sequence in UTF-8 (ArgumentError)
E, [2014-09-24T21:22:33.506288 #18252] ERROR -- : kernel/common/string.rb:103:in `=~'
E, [2014-09-24T21:22:33.506392 #18252] ERROR -- : /srv/<appname>/.rvm/gems/rbx-2.2.10/gems/rack-1.5.2/lib/rack/multipart/parser.rb:92:in 'get_current_head_and_filename_and_content_type_and_name_and_body'
Check your unicorn configuration in unicorn.rb and try to modify the timeout
I have the following error in my nginx logs:
2014/09/23 01:56:40 [info] 18250#0: *38 epoll_wait() reported that
client prematurely closed connection, so upstream connection is closed
too while sending request to upstream, client: 49.128.46.126, server:
tm-google-dev.gumi.sg, request: "GET /versions/ping HTTP/1.1",
upstream: "passenger:/tmp/passenger.1.0.18229/generation-0/request:",
host: "tm-google-dev.gumi.sg:443"
It is not exactly an error 500 or 403, so i can't make out what is it trying to say. Please help. Thanks. The app is a rails app.
I am trying to configure nginx for a rails app on DigitalOcean. When I open my IP, I see the BAD GATEWAY (502) message.
In logs is
2014/06/03 09:58:57 [crit] 28612#0: *1 connect() to unix:/tmp/unicorn.myproject-staging.sock failed (2: No such file or directory) while connecting to upstream, client: 81.161.64.26, server: , request: "GET / HTTP/1.1", upstream: "http://unix:/tmp/unicorn.myproject-staging.sock:/500.html", host: "my_ip"
What does error message means and how could I fix it?
Thank you
EDIT:
The application is deployed here:
/home/deployer/apps/myproject-staging
Please check to ensure your Unicorn is running and the path to the unix socket file is right.
nginx rails sometimes gives 404 error and the error log is (works after nginx restart)
2014/05/14 13:29:49 [crit] 32228#0: *3138 connect() to /tmp/passenger.1.0.32203/generation-0/request failed (2: No such file or directory) whil$
$76.186, server: 107.170.10.25, request: "GET /api/v1/search.json?radius=25&longitude=77.62598510831594&latitude=12.934331866450355&per=10&page$
2014/05/14 13:29:51 [crit] 32228#0: *3140 connect() to /tmp/passenger.1.0.32203/generation-0/request failed (2: No such file or directory) whil$
2014/05/14 13:29:51 [error] 32228#0: *3140 open() "/usr/share/nginx/html/50x.html" failed (2: No such file or directory), client: 171.76.76.186$
If i restart nginx everything works fine. i am using rails 4 passenger 4.0.41 with rvm 1.25.24
i have used passenger-nginx ubuntu package. instructions from https://gorails.com/deploy/ubuntu/14.04
That problem should go away if you set passenger_temp_dir /somewhere-appropriate