It is the open-source application accelerator. Varnish stores file fragments or files in memory, which enable this accelerator to reduce the overall network bandwidth intake and response time on upcoming, equivalent requests. The unique thing about varnish is that it is suitable to use with HTTP protocol.
Almost each web service generally receives the HTTP requests as well as returns the HTTP responses. Unluckily, it never returns the desired response immediately. There is an extensive range of steps required for every request. It is because they are loading the script files, performing the database queries, and launching the interpreter processes. When every action is multiplied by several requests, then the server gets overloaded. Also, system resources are fully drained. In this stage, you can see a considerable performance decrease. If you want to increase the performance, you can opt for magento 2 varnish vcl. It is a specially developed file that supports several stores better and permits purging the arbitrary URLs.
When you are using the varnish cache server, you can ensure that the requests are received by this accelerator rather than a web server. In simple words, the reliable accelerator can take care of the entire responsibility while letting your server to perform the standard tasks. If you desire to grab these benefits, you can immediately perform magento 2 varnish cache setup.
When you decide to use the magento 2 configure varnish cache, it is advised to follow these steps.
If you want to Install varnish on server, you can look at the following steps.
Here, you can uncheck the TTL value for the public content and also set default value as 86400.
You can modify the overall access list and also backend host to 127.0.0.1 from the localhost. It is done from the Varnish configuration tab. After that, you can set a backend port as 8080 before saving the configuration.
If you want to flush varnish cache, you can enter php bin/magento cache:flush to flush the magento cache.
Once you have saved the configuration, you can enter Export Configuration from Stores -> Configuration -> Advanced -> System -> Full Page Cache -> Varnish Configuration tab,
click on the Export VCL for Varnish.
It will download the varnish.vcl
file and export it to /var/www/html/magento/var/
directory.
After that, you can login to the ssh by using root user. Then rename the file from /var/www/html/magento/var/varnish.vcl to /var/www/html/magento/var/default.vcl
Then, you can go to varnish location by enter cd /etc/varnish/
Here you can take a backup of your original default.vcl
file and place the default.vcl file that is actually exported from magento.
/etc/default/varnish,
you can locate for DAEMON_OPTS to change the port to -a :80 from -a :6081
DAEMON_OPTS="-a :80 \
-T localhost:6082 \
-f /etc/varnish/default.vcl \
-p thread_pool_min=1 \
-p thread_pool_max=1500 \
-p http_resp_hdr_len=65536 \
-p http_resp_size=98304 \
-S /etc/varnish/secret \
-s malloc,768m"
sudo nano /etc/systemd/system/multiuser.target.wants/varnish.service
ExecStart=/usr/sbin/varnishd -j unix,user=vcache -F -a :6081 –T 127.0.0.1:6082 -f/etc/varnish/default.vcl -S /etc/varnish/secrets malloc,256m
#ExecStart=/usr/sbin/varnishd -j unix,user=vcache -F -a :6081-T 127.0.0.1:6082 -f/etc/varnish/default.vcl -S/etc/varnish/secret -s malloc,256m
ExecStart=/usr/sbin/varnishd -j unix,user=vcache -F -a :80 -T127.0.0.1:6082 -f/etc/varnish/default.vcl -S /etc/varnish/secret-s malloc,1536m
Listen 80 -> Listen 8080
<VirtualHost *:80> -> <VirtualHost *:8080>
sudo systemctl daemon-reload
sudo service apache2 restart
sudo service apache2 status
sudo service varnish restart
sudo service varnish status
sudo netstat -ltnp | grep :80
Output of your command should be that the apache should be on the 8080 port and varnish on the 80 port.
This process can be done from the admin panel.
/etc/varnish/. directory.
$ cp /etc/varnish/default.vcl /etc/varnish/default.vcl.bak2
$ mv <download_directory>/varnish.vcl default.vcl
$ cp <download_directory>/default.vcl /etc/varnish/default.vcl
acl purge {
"localhost";
}
$ service varnish restart
$ service httpd restart
If you want to know whether varnish cache is functioning of not, you can examine it by following this command:
curl -I -v --location-trusted 'http://127.0.0.1/magento233/'
You can ensure that magento is in a developer mode for debugging about headers.
According to below headers, one can recognize that varnish is caching a page or not
X-Magento-Cache-Control: max-age=86400, public, smaxage=86400
Age:1381
X-Magento-Cache-Debug: HIT
f you want to know how cache works, you can read this passage properly. The varnish http cache can work under a common principle. It is the task of storing the data in the temporary storage unit, known as a cache. When you use this accelerator, you can acquire several benefits, including:
There are lots of benefits associated with varnish reverse proxy that includes Security, SSL download or SSL termination, GZIP compression, and Centralized administration of several SSL certificates.
If you want to boost the speed of the store page, you can focus on Magento 2 Vanish cash. It ensures that the loading speed of your site is increased roughly several times. If you have any doubts about installing this cache, you can read the above guidelines properly. It is highly advised to consider the varnish version to enjoy the latest features and other benefits of this Magento 2 extension.
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