Nginx

Requests that take more than 60s to complete fails – ElasticBeanstalk

Puneet PandeyLeave a comment

This short post specifically targets:
– RoR as web development environment – Can be ignored as this is closely related to nginx configuration settings
– Nginx as web server

While working with ElasticBeanstalk environments, one of my requirement was to send a heavy job to Worker App that takes > 1 min (60 seconds) to complete and I had no configuration in place. The way beanstalk-app was handling that job was disappointing. That job never finishes within a minute and another job (duplicate) gets triggered by the app and this goes on till it reaches the max retry count.

I tried googling the solution and found that we have to increase the timeout for the web server which is handling the request. In my case it was `nginx`.

So I decided to write a config file under `.ebextensions/02_nginx_proxy.config` — I am not going into the details of `ebextensions` here as this is out of scope of this article.

Here’s how my config file looks like:


client_max_body_size 30M;
proxy_send_timeout 600;
proxy_read_timeout 1h;
send_timeout 600;
upstream backend {
server unix:///var/run/puma/my_app.sock ;
}
server {
listen 80;
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
server_name *.cmgresearch.net;
large_client_header_buffers 8 32k;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_buffers 8 32k;
proxy_buffer_size 64k;
proxy_pass http://backend;
proxy_redirect off;
location /assets {
root /var/app/current/public;
}
# enables WS support
location /cable {
proxy_pass http://backend;
proxy_http_version 1.1;
proxy_set_header Upgrade "websocket";
proxy_set_header Connection "Upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
}

view raw

nginx_proxy.config

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Here if you focus on lines:
`proxy_send_timeout 600;`
`proxy_read_timeout 1h;`
`send_timeout 600;`

This will prevent sending multiple requests of same job type until the current one finishes in 1h.

If you need any inputs on what other lines are all about/doing, then leave your comment.

Happy Coding!