About Varnish
Varnish is an HTTP accelerator and a useful tool for speeding up a server, especially during a times when there is high traffic to a site. It works by redirecting visitors to another port or IP on a Webserver. In This case it's Apache running on port 8080 (default is port 80) on the same server!!.
Info : https://varnish-cache.org/faq/index.html
Info : https://varnish-cache.org/faq/index.html
The Setup : (on Ubuntu 16.04 LTS )
sudo apt install varnish or sudo apt-get install varnish
nano /etc/apache2/ports.conf
Change : Listen 127.0.0.1:80 < to > Listen 127.0.0.1:8080
# Save with X -> Next step....
sudo nano /etc/varnish/default.vcl
# Default backend definition. Set this to point to your content server.
backend default {
## #The V4 IP on the Web-server
.host = "10.0.0.4";
###The port where the Webserver listen.
.port = "8080";
}
# Save with X -> Next step....
nano /etc/systemd/system/multi-user.target.wants/varnish.service
## Find the 6081 and change it to 80 (near "user=vcache -F -a")
###Like this :
[Unit]
Description=Varnish HTTP accelerator
Documentation=https://www.varnish-cache.org/docs/4.1/ man:varnishd
[Service]
Type=simple
LimitNOFILE=131072
LimitMEMLOCK=82000
ExecStart=/usr/sbin/varnishd -j unix,user=vcache -F -a :80 -T localhost:6082 -f$
ExecReload=/usr/share/varnish/reload-vcl
ProtectSystem=full
ProtectHome=true
PrivateTmp=true
PrivateDevices=true
[Install]
WantedBy=multi-user.target
# Save with X -> Next step.... # Restart httpd service and Varnish...
sudo service varnish restart
systemctl daemon-reload
####TEST######## Note : port 80 and the webserver : 8080
root@WindarPh-China01:/# netstat -tupln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:29130 0.0.0.0:* LISTEN 1820/mdsd
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1098/varnishd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1092/sshd
tcp 0 0 127.0.0.1:6082 0.0.0.0:* LISTEN 1098/varnishd
tcp6 0 0 :::80 :::* LISTEN 1098/varnishd
tcp6 0 0 :::8080 :::* LISTEN 1497/apache2
udp 0 0 0.0.0.0:68 0.0.0.0:* 966/dhclient
sudo apt install varnish or sudo apt-get install varnish
nano /etc/apache2/ports.conf
Change : Listen 127.0.0.1:80 < to > Listen 127.0.0.1:8080
# Save with X -> Next step....
sudo nano /etc/varnish/default.vcl
# Default backend definition. Set this to point to your content server.
backend default {
## #The V4 IP on the Web-server
.host = "10.0.0.4";
###The port where the Webserver listen.
.port = "8080";
}
# Save with X -> Next step....
nano /etc/systemd/system/multi-user.target.wants/varnish.service
## Find the 6081 and change it to 80 (near "user=vcache -F -a")
###Like this :
[Unit]
Description=Varnish HTTP accelerator
Documentation=https://www.varnish-cache.org/docs/4.1/ man:varnishd
[Service]
Type=simple
LimitNOFILE=131072
LimitMEMLOCK=82000
ExecStart=/usr/sbin/varnishd -j unix,user=vcache -F -a :80 -T localhost:6082 -f$
ExecReload=/usr/share/varnish/reload-vcl
ProtectSystem=full
ProtectHome=true
PrivateTmp=true
PrivateDevices=true
[Install]
WantedBy=multi-user.target
# Save with X -> Next step.... # Restart httpd service and Varnish...
sudo service varnish restart
systemctl daemon-reload
####TEST######## Note : port 80 and the webserver : 8080
root@WindarPh-China01:/# netstat -tupln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:29130 0.0.0.0:* LISTEN 1820/mdsd
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1098/varnishd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1092/sshd
tcp 0 0 127.0.0.1:6082 0.0.0.0:* LISTEN 1098/varnishd
tcp6 0 0 :::80 :::* LISTEN 1098/varnishd
tcp6 0 0 :::8080 :::* LISTEN 1497/apache2
udp 0 0 0.0.0.0:68 0.0.0.0:* 966/dhclient
####TEST########
curl 127.0.0.1
####TEST########
varnishtop
### Open a browser and try the webserver's IP ;-)
-Errors.... Is the UFW on? Is the ports open? (The firewall)
-Errors.... What do the log in /var/log/varnish say ??
