.ebextensions\nginx_proxy.config

# This is to enable WS support. Credits: # https://gist.github.com/Bubelbub/0a942a0d51a3d329897d
# THIS WORKS! for running the example 5.0.0.beta1 chat app on a single instance Elastic beanstalk AWS instance

files:
  "/etc/nginx/conf.d/websockets.conf" :
    content: |
      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 env1.t3tiiauce6.us-west-2.elasticbeanstalk.com

          # prevents 502 bad gateway error
          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;

              # prevents 502 bad gateway error
              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 $http_upgrade;
                proxy_set_header Connection "upgrade";
              }
          }
      }


container_commands:
  01restart_nginx:
    command: "service nginx restart"

now you might need to set server_names_hash_bucket_size 128; if your server name URL is really long

Does anyone know how to fix this error I get when I do "eb deploy"

Creating application version archive "app-69d3-170321_224137". Uploading: [##################################################] 100% Done... INFO: Environment update is starting. INFO: Deploying new version to instance(s). ERROR: [Instance: i-0b90fe72a05f095c7] Command failed on instance. Return code: 6 Output: nginx: [warn] conflicting server name "localhost" on 0.0.0.0:80, ignored nginx: [emerg] could not build server_names_hash, you should increase server_names_hash_bucket_size: 64 nginx: configuration file /etc/nginx/nginx.conf test failed. container_command 01restart_nginx in .ebextensions/nginx_proxy.config failed. For more detail, check /var/log/eb-activity.log using console or EB CLI. INFO: Command execution completed on all instances. Summary: [Successful: 0, Failed: 1]. ERROR: Unsuccessful command execution on instance id(s) 'i-0b90fe72a05f095c7'. Aborting the operation. ERROR: Failed to deploy application.

@Ravenclaw968 I got the same issue; if you got the solution please let mi know

Would the location /cable section need to change if the site is using https:? I've implemented these suggestions, but I still receive the following error in the console:

WebSocket connection to 'wss://subdomain.mywebsitedomain.org/cable' failed: Error during WebSocket handshake: Unexpected response code: 404

@Ravenclaw968 @jasmo2 did you guys manage to solve the abovementioned problem in the end?

is there a solution for eb deploy exception:

nginx: [alert] could not open error log file: open() "/var/log/nginx/error.log" failed (2: No such file or directory)
2017/11/30 10:06:23 [emerg] 13178#0: open() "/var/log/nginx/error.log" failed (2: No such file or directory)
nginx: configuration file /etc/nginx/nginx.conf test failed.

Did anyone use config.force_ssl = true in your production.rb? I use this nginx config with the setting. However, I keep getting 301 redirection.

In my experience config.force_ssl = true in Rails lead to a redirect loop for a proxy_pass http://.... I force ssl using nginx redirects.