title: How to enable "ngx_http_realip_module" on passenger-standalone running on Elastic Beanstalk environment?
body: <p>I'm trying to use the option <code>set_real_ip_from</code> inside the <code>http {}</code> block on my Elastic Beanstalk environment, but I'm receiving this error:</p>
  
  <pre><code>$ service passenger restart
  *** ERROR *** Could not start Passenger Nginx core: nginx: [emerg] unknown directive "set_real_ip_from" in
  </code></pre>
  
  <p>Beanstalk are using passenger standalone with nginx embedded:</p>
  
  <pre><code>$ gem list |grep passenger 
  passenger (4.0.60)
  
  $ /opt/elasticbeanstalk/bin/get-config container -k nginx_version
  1.8.1
  </code></pre>
  
  <p>I tried update passenger to a newer version using <code>gem install passenger</code>:</p>
  
  <pre><code>$ gem install passenger
  Fetching: passenger-5.1.2.gem (100%)
  Building native extensions.  This could take a while...
  Successfully installed passenger-5.1.2
  Parsing documentation for passenger-5.1.2
  Installing ri documentation for passenger-5.1.2
  Done installing documentation for passenger after 48 seconds
  1 gem installed
  </code></pre>
  
  <p>But when restarting passenger, I received this:</p>
  
  <pre><code>---------------------------------------
  
  No precompiled Nginx engine could be downloaded. Compiling it from source instead.
  
  
  --------------------------------------------
  
  Checking for required software...
  
   * Checking for C compiler...
        Found: yes
        Location: /usr/bin/cc
   * Checking for C++ compiler...
        Found: yes
        Location: /usr/bin/c++
   * Checking for GNU make...
        Found: yes
        Location: /usr/bin/gmake
   * Checking for Rake (associated with /opt/rubies/ruby-2.3.1/bin/ruby)...
        Found: yes
        Location: /opt/rubies/ruby-2.3.1/bin/ruby /opt/rubies/ruby-2.3.1/bin/rake
   * Checking for OpenSSL development headers...
        Found: yes
        Location: /usr/include/openssl/ssl.h
   * Checking for Zlib development headers...
        Found: yes
        Location: /usr/include/zlib.h
   * Checking for PCRE development headers...
        Found: yes
        Location: /usr/include/pcre.h
  
  Installing...
  Downloading Nginx 1.8.1 source code...
  ######################################################################## 100.0%
  Extracting tarball...
  Compiling support libraries (step 1 of 2)...
  [**************************************************] -
  Compiling Nginx engine (step 2 of 2)...
  [************                                      ] \
  ./configure: error: invalid option "--with-http_v2_module"
  *** ERROR: command failed: cd /tmp/passenger-install.wmn75y/nginx-1.8.1 &amp;&amp; env PASSENGER_INCLUDEDIR=/opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/passenger-5.1.2/src PASSENGER_LIBS=/tmp/passenger-install.wmn75y/common/libpassenger_common/Logging.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/Exceptions.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/Utils/SystemTime.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/Utils/StrIntUtils.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/Utils/StrIntUtilsNoStrictAliasing.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/Utils/IOUtils.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/Utils.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/WatchdogLauncher.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/AppTypes.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/Utils/CachedFileStat.o\ /tmp/passenger-install.wmn75y/common/libpassenger_common/UnionStationFilterSupport.o\ /tmp/passenger-install.wmn75y/common/libboost_oxt.a /bin/bash ./configure --prefix=/tmp --with-cc-opt=-Wno-error --without-http_fastcgi_module --without-http_scgi_module --without-http_uwsgi_module --with-ipv6 --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-http_gzip_static_module --with-http_stub_status_module --with-http_addition_module --add-module=/opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/passenger-5.1.2/src/nginx_module
  </code></pre>
  
  <p>How to recompile this embedded nginx or is there any other easy way to enable this module?</p>
  
  <blockquote>
    <p>This is just a test before I manage to do it permanently through <code>.ebextension</code></p>
  </blockquote>