Example NGINX configuration to route based on country code using GeoIP

nginx.conf

# load dynamic modules
load_module /etc/nginx/modules/ngx_http_geoip_module.so;

user  nginx;
worker_processes  auto;
error_log  /var/log/nginx/error.log info;
pid        /var/run/nginx.pid;
events { worker_connections  1024; }

http {
	default_type  text/html;

    	log_format  main  'remote_addr: $remote_addr, remote_user: $remote_user [time_local: $time_local] request: "$request" '
                      	  'status: $status, body_bytes_sent: $body_bytes_sent, http_referer: "$http_referer" '
                      	  'http_user_agent: "$http_user_agent:", http_x_forwarded_for: "$http_x_forwarded_for" '
			  'geoip_area_code: $geoip_area_code, geoip_city: $geoip_city, geoip_city_continent_code: $geoip_city_continent_code, geoip_city_country_code: $geoip_city_country_code, geoip_city_country_code3: $geoip_city_country_code3, geoip_city_country_name: $geoip_city_country_name, geoip_country_code: $geoip_country_code, geoip_country_code3: $geoip_country_code3, geoip_country_name: $geoip_country_name, geoip_dma_code: $geoip_dma_code, geoip_latitude: $geoip_latitude, geoip_longitude: $geoip_longitude, geoip_org: $geoip_org, geoip_postal_code: $geoip_postal_code, geoip_region: $geoip_region, geoip_region_name: $geoip_region_name';

	access_log  /var/log/nginx/access.log  main;

	# load Maxmind GeoIP library
	geoip_country         /etc/nginx/GeoIP/GeoIP.dat;
	geoip_city            /etc/nginx/GeoIP/GeoLiteCity.dat;
	geoip_proxy 127.0.0.1;

	# map country code to specific NGINX upstream
	map $geoip_country_code $upstream {
		LR		web_lr;
		US		web_us;
		RU		web_russia;
		default		$subnet;
	}

	# map private subnets to $subnet variable (used in upstream map above)
	geo $subnet {
		127.0.0.0/24	web_us;
		10.0.0.0/24	web_us;
		192.168.1.0/24	web_us;
		default		web_default;
	}

	upstream web_lr {
		zone web-lr 64k;
		server 127.0.0.1:3001;
	}

	upstream web_russia {
		zone web-russia 64k;
		server 127.0.0.1:4001;
	}

	upstream web_us {
		zone web-us 64k;
		server 127.0.0.1:5001;
	}

	upstream web_default {
		zone web-default 64k;
		server 127.0.0.1:6001;
	}

	server {
		status_zone web-lr-backend;
		listen 3001;
		location / {
			return 200 "GeoIP has matched this request to a LR country code.
http_x_realip:\t $http_x_real_ip\n
http_x_forwarded_for:\t $http_x_forwarded_for\n
geoip_country_code:\t $geoip_country_code\n";
		}

	}

	server {
		status_zone web-russia-backend;
		listen 4001;
		location / {
			return 200 "GeoIP has matched this request to a RU country code.
http_x_realip:\t $http_x_real_ip\n
http_x_forwarded_for:\t $http_x_forwarded_for\n
geoip_country_code:\t $geoip_country_code\n";
		}

	}

	server {
		status_zone web-us-backend;
		listen 5001;
		location / {
			return 200 "GeoIP has matched this request to a US country code.\n
http_x_realip:\t $http_x_real_ip\n
http_x_forwarded_for:\t $http_x_forwarded_for\n
geoip_country_code:\t $geoip_country_code\n";
		}
	}

	server {
		status_zone web-default-backend;
		listen 6001;
		location / {
			return 200 "NGINX has routed this request to the default site.\n
http_x_realip:\t $http_x_real_ip\n
http_x_forwarded_for:\t $http_x_forwarded_for\n
geoip_country_code:\t $geoip_country_code\n";
		}
	}


	server {
		status_zone nginx-frontend;
		listen 80;
		location / {
			proxy_set_header Host $host;
			proxy_set_header X-Real-IP $remote_addr;
			proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
			proxy_set_header X-GeoIP-Country-Code $geoip_country_code;
			real_ip_header X-Forwarded-For;
			proxy_pass http://$upstream;
		}

	}

	server {
		listen 8080;
		status_zone status-page;
		root /usr/share/nginx/html;
		location = /status.html { }
		location = /status-old.html { }
		location = / {
			return 301 /status.html;
		}
		location /status {
			status;
			status_format json;
			access_log off;
		}
		location /upstream_conf {
			upstream_conf;
		}
	}
}