Simple examples to use for configuring NGINX.

.Nginx-Routing-Guide

Summary: Simple examples to use for configuring NGINX.

1-simple-routing-example.conf

# Assuming this file is created inside /etc/nginx/conf.d

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://125.0.1.2;
    }
}


# Request flow: `localhost:80` ===> `http://125.0.1.2;`

2-custom-path-routing-example.conf

# Assuming this file is created inside /etc/nginx/conf.d

server {
    listen 80;
    server_name example.com;

    location /johnsmith {
        proxy_pass http://125.0.1.2;
    }
}

# Assuming that your server has a domain name of `example.com`
# Request flow: `example.com/johnsmith` =====loads=====>> `http://125.0.1.2;`



server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://125.0.1.2/janedoe;
    }
}

# Assuming that your server has a domain name of `example.com`
# Request flow: `example.com` =====loads=====>> `http://125.0.1.2/janedoe;`



server {
    listen 80;
    server_name example.com;

    location /alanlee {
        proxy_pass http://125.0.1.2/annasamuels;
    }
}

# Assuming that your server has a domain name of `example.com`
# Request flow: `example.com/alanlee` =====loads=====>> `http://125.0.1.2/annasamuels;`

3-load-balancing-example.conf

# Assuming this file is created inside /etc/nginx/conf.d

upstream cluster_of_hosts {
    server 125.2.3.4:4000;
    server 125.2.3.4:4001;
    server 125.2.3.4:4002;
}

server {
    listen 80;
    server_name example.com;

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

# Assuming that your server has a domain name of `example.com`
# Request flow: `example.com` then would hit `125.2.3.4:4000`, `125.2.3.4:4001`, `125.2.3.4:4002` in a round-robin manner. 

4-common-mistakes.conf

# Assuming this file is created inside /etc/nginx/conf.d

# Let's say you want this configuration:
#                     `example.com`     =====loads=====>>    `http://127.0.0.1:3000`
# and         `example.com/backend`     =====loads=====>>     `http://127.0.0.1:9000`
# assuming that the server running on `http://127.0.0.1:3000` does not have any '/backend' routes




# ----- The WRONG way to do it (it will not work): -----
server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://127.0.0.1:3000;
    }
}

server {
    listen 80;
    server_name example.com;

    location /backend {
        proxy_pass http://127.0.0.1:9000;
    }
}




# ----- The RIGHT way to do it (this will work): -----
server {
    listen 80;
    server_name example.com;
    
    location / {
        proxy_pass http://127.0.0.1:3000;
    }

    location /backend {
        proxy_pass http://127.0.0.1:9000;
    }
}