Before upgrade Magento 2.4 To Magento 2.4.3 community-edition to check system requirement as per Magento 2.4.3 working fine.
[1] – Take Project files & database backup
[2] – To check PHP 7.4, MySQL 5.7 working fine, Magento 2.4 also supports MySQL 8.0
[3] – To check Elasticsearch 7.9 or above version working fine by command
curl -XGET 'http://localhost:9200'
Finally, system check requirement has been done.
The following below steps need to follow to Upgrade Magento version 2.4 To Magento version 2.4.3
[1] – Put site into maintenance mode by below command at Magento 2.4 root
php bin/magento maintenance:enable
[2] – Take a backup of the composer.json by below command at Magento 2.4 root path
cp composer.json composer.json.bak
[3] – Update composer.json file with the latest version. In our case, It is Magento Version 2.4.3
By below command at Magento 2.4 root path
composer require magento/product-community-edition=2.4.3 --no-update
If you get an error related to allure-framework/allure-phpunit and phpunit/phpunit package, change the version of those two packages in the composer.json file from the vanilla 2.4.3 version and run the above command again.
This above command will take some time & actually download all the required packages and upgrade your Magento version from 2.4 to 2.4.3
[4] – Run Update command
composer update
[5] – Finally run below command at Magento 2.4 root path
php bin/magento cache:clean
rm -rf var/cache/*
rm -rf var/page_cache/*
rm -rf generated/code/*
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy -f
[6] – Disable maintenance mode run below command at Magento 2.4 root path
php bin/magento maintenance:disable
Remove update directory from your root folder as no need to update directory
[7] – Finally, Magento 2.4 Community Edition has been successfully upgraded into Magento 2.4.3 Community Edition
Run upgraded Magento 2.4.3 Frontend as well as Backend
Other important Magento 2.4.x issue as below
Magento 2.3 To Magento 2.4.5 Compatibility For PHP, MYSQL, Composer, Apache etc
Magento 2.4.3-p1 Installation Steps
Magento 2.4.3 Installation Steps
Magento 2.4 Two Factor Authentication
Magento 2.2, Magento 2.3, Magento2.4 Installation Issue on Windows 10, XAMPP
Magento 2 Installation at 51% Error: (Wrong file in Gd2.php:64) Module ‘Magento_Theme’
How To Upgrade Magento 2.4 To Magento 2.4.3 Enterprise-Edition / Commerce Cloud Edition
How To Upgrade Magento 2.4 To Magento 2.4.3 community-edition