[Solved] nginx unknown directive "upstream"

Issue:- 

The issue occured when i was trying to use the upstream to proxypass i.e. use the nginx as reverse proxy for exposing the kubernetes application.

Error:- 

unknown directive "upstream" in /etc/nginx/nginx.conf:1 configuration file /etc/nginx/nginx.conf test failed

Cause:-

In Nginx upstream directive is only valid in the http contex.

Resolution:-

So instead of making the changes in the nginx.conf try to use this in the default.conf. Also I preferred to proxy the request directly in the default.conf which actually got the rid of the upstream although when i tested upstream also worked fine. So i made the change under /etc/nginx/sites-enabled/default.conf which is soft link to /etc/nginx/sites-available/default.conf

##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# https://www.nginx.com/resources/wiki/start/
# https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
# https://wiki.debian.org/Nginx/DirectoryStructure
#
# In most cases, administrators will remove this file from sites-enabled/ and
# leave it as reference inside of sites-available where it will continue to be
# updated by the nginx packaging team.
#
# This file will automatically load configuration files provided by other
# applications, such as Drupal or Wordpress. These applications will be made
# available underneath a path with that package name, such as /drupal8.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

# Default server configuration
#
#

server {
    listen 80;
    listen [::]:80;

    location / {
        proxy_set_header X-Forwarded-Host $host:$server_port;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://192.168.49.2:31264;
    }
}

# Virtual Host configuration for example.com