Nginx

install

Remove apache2

• In case for any error, stop apache first:

sudo service apache2 stop
sudo apt-get purge apache2 apache2-utils apache2.2-bin apache2-common
sudo apt-get autoremove

• apt-get install nginx
• allow gfw -> sudo ufw allow 'Nginx HTTP'
• Test

Restart

• service nginx start
• check start status -> systemctl status nginx.service
• systemctl restart nginx

• Default root folder /var/www/html

Full remove

• sudo apt-get remove nginx nginx-common # Removes all but config files.
• sudo apt-get purge nginx nginx-common # Removes everything.
• sudo apt-get autoremove

Upgrade

1. Add the sources

sudo echo "
deb http://packages.dotdeb.org jessie all
deb http://nginx.org/packages/mainline/debian/ jessie nginx" | sudo tee -a /etc/apt/sources.list

# Add the keys to our system so we trust packages from the sources we added
cd /tmp
wget http://www.dotdeb.org/dotdeb.gpg
sudo apt-key add dotdeb.gpg

wget http://nginx.org/keys/nginx_signing.key
sudo apt-key add nginx_signing.key

# finally install nginx
sudo apt update && sudo apt install nginx-full -y

Config

Config sites file

backup site files in sites-available, activatived sites in sites-enabled, creat soft link from sites-available to sites-enabled.

• default config file: nano /etc/nginx/sites-available/default
• create soft link to sites-enabled by ls -n /etc/nginx/sites-available/example.com /etc/nginx/sites-enabled/example.com

• link enable config file: /etc/nginx/sites-enabled/default
• delete etc/nginx/sites-avaialble/default
• edit /etc/nginx/sites-enabled/default
• set server_name www.example.com example.com;

Futher Config

Steps	Header text	Header text
Nginx config	/etc/nginx/nginx.conf
Default site config	/var/www/html -> defined at /etc/nginx/sites-enabled/default	-

• create file e.g. /etc/ningx/sites-enabled/iot.electrodragon.com.conf
• Optimize -> delete other conf file? FastCGI cache?, gzip missing?

Optimized

• sudo nano /etc/nginx/nginx.conf
• nginx -> enable gzip on, set staic file caching?, buffers, timetout

NGINX Config

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

	root /usr/share/nginx/www;  # root of user file
	index index.html index.htm; # file name

	server_name localhost; # e.g. www.electrodragon.com

	location / {
		try_files $uri $uri/ /index.html;
	}

	location /doc/ {
		alias /usr/share/doc/;
		autoindex on;
		allow 127.0.0.1;
		deny all;
	}
}

Setup for uwsgi

server {
        listen 80;

        server_name www.portf.ltd portf.ltd;

        # root /var/www/html;
        # index index.html;

        location / {
                # try_files $uri $uri/ =404;
                include uwsgi_params; 
                uwsgi_pass unix:/var/www/html/flask-test/sock.sock;
        }
}

Log

• /var/log/nginx

Error Fix

upstream prematurely closed connection while reading response header from upstream

• Reference - https://stackoverflow.com/questions/27396248/uwsgi-nginx-flask-upstream-prematurely-closed