Based on https://gist.github.com/GAS85/8dadbcb3c9a7ecbcb6705530c1252831
- A self-managed VPS or dedicated server with Ubuntu 20.04 running Apache 2.4.xx.
- A registered domain name with working HTTPS (TLS/SSL). HTTP/2 only works alongside HTTPS because most browsers, including Firefox and Chrome, don’t support HTTP/2 in cleartext (non-TLS) mode.
Per default it will be apache2 version 2.4.41 what is enought for http2 support.
sudo apt install apache2
You want to make Apache use a compatible PHP implementation by changing mod_php to php-fpm (PHP FastCGI). If your website or app breaks on FastCGI, you can always revert back to mod_php until further troubleshooting.
Install PHP FastCGI module for PHP 7.4, it is default version for Ubuntu 20.04
sudo apt install php7.4-fpm
Enable required modules, proxy_fcgi and setenvif:
sudo a2enmod proxy_fcgi setenvif
Enable php7.4-fpm:
sudo a2enconf php7.4-fpm
Disable the mod_php module:
sudo a2dismod php7.4
Restart Apache:
sudo service apache2 restart
(This step is not needed for Ubuntu 22.04 and above)
Since the default "prefork" MPM (Multi-Processing Module) is not fully compatible with HTTP/2, you’ll need to change Apache’s current MPM to "event" (or "worker"). This is shown by the error message in Apache versions greater than 2.4.27 as – AH10034: The mpm module (prefork.c) is not supported by mod_http2.
Keep in mind that your server requires more horsepower for HTTP/2 than for HTTP/1.1, due to the multiplexing feature and other factors. That said, smaller servers with low traffic may not see much difference in performance.
First, disable the "prefork" MPM:
sudo a2dismod mpm_prefork
Enable the "event" MPM:
sudo a2enmod mpm_event
Restart Apache2 and PHP 7.4:
sudo service apache2 restart && sudo service php7.4-fpm restart
Add the following line to your site’s current Virtual Host config file. This can go anywhere between the ... tags. If you want to serve HTTP/2 for all your sites, add this to your global /etc/apache2/apache2.conf file instead of per each individual site’s Virtual Host file.
Protocols h2 h2c http/1.1
Explanation: h2 is TLS-encrypted HTTP/2, h2c is cleartext HTTP/2, and http/1.1 is ordinary HTTP/1.1.
Having http/1.1 at the end of the line provides a fallback to HTTP/1.1, while h2c is not strictly necessary.
Now you can enable the http2 module in Apache:
sudo a2enmod http2
Check Apache2 config and if no errors, restart Apache:
sudo apachectl configtest && sudo service apache2 restart
Create a new http2.conf
sudo nano /etc/apache2/conf-available/http2.conf
and add all the following rows:
<IfModule http2_module>
Protocols h2 h2c http/1.1
H2Direct on
</IfModule>
Enable the http2.conf by running
sudo a2enconf http2
Check Apache2 config and if no errors, restart your Apache2
sudo apachectl configtest && sudo service apache2 restart
and enhance your ssl-vhost file (default-ssl.conf):
sudo nano /etc/apache2/sites-available/default-ssl.conf
Amend in your configuration file:
...
Protocols h2 h2c http/1.1
H2Push on
H2PushPriority * after
H2PushPriority text/css before
H2PushPriority image/jpg after 32
H2PushPriority image/jpeg after 32
H2PushPriority image/png after 32
H2PushPriority application/javascript interleaved
...
P.S. All in one command (you still have to edit your VirtualHost and ssl config):
sudo apt update
sudo apt upgrade
sudo apt install apache2 php7.4-fpm
sudo a2enmod proxy_fcgi setenvif
sudo a2enconf php7.4-fpm
sudo a2dismod php7.4
sudo service apache2 restart
sudo a2dismod mpm_prefork
sudo a2enmod mpm_event
sudo service apache2 restart
sudo service php7.4-fpm restart
sudo a2enmod http2
sudo service apache2 restart
sudo echo "<IfModule http2_module>" > /etc/apache2/conf-available/http2.conf
sudo echo "Protocols h2 h2c http/1.1" >> /etc/apache2/conf-available/http2.conf
sudo echo "H2Direct on" >> /etc/apache2/conf-available/http2.conf
sudo echo "</IfModule>" >> /etc/apache2/conf-available/http2.conf
sudo a2enconf http2
sudo apachectl configtest && sudo service apache2 restart
This command will install apache2 and php7.4-fpm.
This command will install php7.4-fpm only.
There is no harm if you provide more packages to
aptin one line, it will simply skip all of already installed.