Install Varnish with Nginx Web Server Ubuntu 16.04 LTS

Install Varnish with Nginx Web Server Ubuntu 16.04 LTS
– Install Nginx from the Ubuntu repository by using the apt-get command to server.

sudo apt-get update
sudo apt install nginx -y

When the Nginx installation is complete the next step is to start Nginx and enable it for startup every time at system boot by using the systemctl commands given below.

 
sudo systemctl start nginx
sudo systemctl enable nginx

Now time to Check Nginx which port is working on it. Nginx/Apache, etc web server default port is port 80.

 netstat -ntlup | grep nginx 

After check Nginx port then you need to change Nginx port which we are going to standard port 80 to non-standard port 8080.

cd /etc/nginx/sites-available
vim default 

Now you should change default port of Nginx.

Change 'listen' line value 80
 listen 80 default_server;
 listen [::]:80 default_server ipv6only=off; # If you have require IPv6 then on it 

TO

Change 'listen' line value 8080.
 listen 8080 default_server;
 listen [::]:8080 default_server ipv6only=off; # If you have require IPv6 then on it 

Save the File and exit from it.
After that Check nginx config file and you should restart nginx service.

nginx -t
sudo systemctl restart nginx

After restarting the nginx server then again check port.

 netstat -ntlup | grep nginx 

nginx is working on the port 8080.
– Install Varnish on Ubuntu 16.04 LTS

sudo apt-get update
sudo apt-get install varnish

When we have installed Varnish on machine then we required to enable service and restart.

sudo systemctl start varnish.service
sudo systemctl enable varnish.service

Then enable service we are change to Varnish port.

vim /etc/varnish/default.vcl

backend default {
     .host = "127.0.0.1";
     .port = "8080";
 }

Now you can do Save and exit…
Now Varnish need to set port 80.

vim /etc/default/varnish

Check on the file ‘DAEMON_OPTS’ line and default port is 6081. So we need to change this 6081 port to port 80.
Note: Varnish consume memory 256m, you can change as per requirement.

DAEMON_OPTS="-a :80 
              -T localhost:6082 
              -f /etc/varnish/default.vcl 
              -S /etc/varnish/secret 
              -s malloc,256m"

Do Save and exit…
Reload the system config daemon and restart your Varnish service.

sudo systemctl daemon-reload
sudo systemctl restart varnish
sudo service php7.1-fpm restart 

Wonderful Job!!!!!
Again Check Varnish do creating stats or not.

varnishstat

You should also check with terminal.

crul -I http://domain-name 

OR

Note: Find to how to get Lifetime free SSL Certificate for domain

For more detail : Varnish Cache