Nginx

nginx.md

Nginx features

• Web Server
• Load Balancer
• Reverse Proxy
• Monitoring and Management

HTTP Codes

• 100-199 : Information status codes
• 200-299 : Success status codes
• 300-399 : Redirection status codes
• 400-499 : Client error status codes
• 500-599 : Server error status codes

example:

• 301: Move Permanently
• 304: Not modified
• 401: Un-Authorized
• 403: Forbidden
• 404: Page not found
• 500: Internal Server Error

Install Nginx by docker

docker pull nginx

Run nginx by docker

docker run -d --name nginx-test -p 8080:80 nginx

Connect and login to running nginx

docker exec -it docker-name bash

Stop and Start nginx service

service nginx start
service nginx stop
service nginx status

nginx configs

/conf/nginx/nginx.conf

user nginx;
worker_processes auto;

• worker_processes auto; it means nginx master creates worker processes by core cpu number.
• worker_processes 1; this one creates 1 worker process.

Validation nginx configuration

nginx -t

default location of nginx html files

/usr/share/nginx/html/

simple nginx server

server {

server_name localhost;

location / {
  root /var/www;
  index index.html;   
}

}

we can validate config file with nginx -t and after that we can reload nginx server:

service nginx reload

How can we create reverse proxy with nginx

server {

server_name localhost;

location / {
    proxy_pass http://google.com
}

}

directive syntax: proxy_pass ;

Pass all client header by nginx proxy

proxy_set_header Host $host;
proxy_set_header X-Forwarded-By $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;