How to configure varnish and Magento 2

Configure Varnish and your web server

step1 : install varnish

apt install -y varnish
varnishd -V

step2 : change nginx port and varnish port

• nginx port:

/etc/nginx/sites-avaiable

server{ listen 8080;}

check: netstat -tulpn

• varnish port:

/etc/default/varnish

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

VARNISH_LISTEN_PORT=80

varnish 5:/lib/systemd/system/varnish.service

How to set Varnish to run on port 80. Malfunction of DAEMON_OPTS set in /etc/default/varnish

varnish 6: /etc/systemd/system/varnish.service.d/customexec.conf

Put Varnish on port 80 - Varnish version 6.2.3 documentation

verify varnish port

step 3: configure magento and varnish

download varnish config file from magento admin

fixed:

“Tip “: error 503 backend fetch failed varnish

.probe = {
        .url = "/pub/health_check.php";

change it to

.probe = {
        .url = "/health_check.php";

step4: set varnish purge with magento cache clear

bin/magento config:set system/full_page_cache/caching_application 2

bin/magento setup:config:set --http-cache-hosts=192.168.00.00:80

How to set up mutiple domains with Nginx and Varnish in same server | DigitalOcean

curl -v -X PURGE -H ‘X-Magento-Tags-Pattern: .*’ http://dev.jtcmetals.com/