Nginx config file overwritten during Elastic Beanstalk deployment?

Question

I need to add p3p headers to the static resource location on a standard Nodejs & Nginx Elastic Beanstalk.

I\'ve created an ebextension script as exp

Answer 1

It seems that Elastic Beanstalk has changed and the commonly recommended approach/hack of overwriting #etc#nginx#conf.d#00_elastic_beanstalk_proxy.conf doesn't work any more. Nor does creating any file in /tmp/deployment/config.

The solution I found was to overwrite /etc/nginx/conf.d/00_elastic_beanstalk_proxy.conf directly, using a container_commands directive, since these commands are executed after the Elastic Beanstalk install creates it's version of the nginx config.

From http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/customize-containers-ec2.html#linux-container-commands:

They [container_commands] run after the application and web server have been set up and the application version file has been extracted, but before the application version is deployed.

I did this in three steps within .ebextensions:

1. Create my version of the nginx config file.

2. Create a script to overwrite the standard config file with my own.

3. Run the script.

The first two steps happen earlier in the install process, while the last uses container_commands so as described previous happens late in the install.

Here's the files I used:

File .ebextensions/install_nginx_config_01.config:
(Note that the indenting is important)

#
#   STEP 1 - Create the nginx config file
#
files:

  "/tmp/my.nginx.conf" :
    mode: "000755"
    owner: root
    group: root
    content: |
      # This file was overwritten during deployment
      # by .ebextensions/install_nginx_config_03.config

      upstream nodejs {
          server 127.0.0.1:3000;
          keepalive 256;
      }

      server {
          listen 8080;

          location / {
              proxy_pass  http://nodejs;
              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;
          }

          gzip on;
          gzip_comp_level 4;
          gzip_types text/html text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
      }

File .ebextensions/install_nginx_config_02.config:

#
#   STEP 2 - Create a script that will overwrite the Nginx config
#
files:

  "/tmp/install-nginx-config.sh" :
    mode: "000755"
    owner: root
    group: root
    content: |
      #!/bin/sh
      cp /tmp/my.nginx.conf /tmp/deployment/config/#etc#nginx#conf.d#00_elastic_beanstalk_proxy.conf

File .ebextensions/install_nginx_config_03.config:

#
#   STEP 3 - Run the script to overwrite the nginx config template.
#
container_commands:

  01_runmyshellscript:
    command: "/tmp/install-nginx-config.sh"