How to change nginx config in amazon elastic beanstalk running a docker instance

Question

After i login and the cookie is set I get error 502. When i read the log i get the error:

014/05/17 01:54:43 [error] 11013#0: *8 upstream sent too big header         


        

Answer 1

Another way to extend Elastic Beanstalk nginx config is to create a file in the .ebextensions directory, named for example nginx.config with the following content :

    files:
      "/etc/nginx/conf.d/000_my_config.conf":
      content: |
        upstream nodejsserver {
          server 127.0.0.1:8081;
          keepalive 256;
        }

        server {
          listen 8080;

          location / {
            proxy_pass  http://nodejsserver;
            proxy_set_header   Connection "";
            proxy_http_version 1.1;
            proxy_set_header        Host            $host;
            proxy_set_header        X-Real-IP       $remote_addr;
            proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
          }

          location /myconfig {
            proxy_pass http://my_proxy_pass_host;
          }
        }

/etc/nginx/conf.d/000_my_config.conf is the filename which will be created on the Elastic Beanstalk EC2 instances. By default this configuration is in the file /etc/nginx/conf.d/00_elastic_beanstalk_proxy.conf. So if you prefix with 000, it guarantees you that your configuration will be taken into account first.

The content has been copied from the default nginx configuration (/etc/nginx/conf.d/00_elastic_beanstalk_proxy.conf again), then customized with my own configuration.