Plesk pre-migration check to AlmaLinux 9 shows a warning: The following Apache modules are not installed on the destination server: http2, lua, php7, proxy_http2.

Symptoms

Plesk pre-migration check to AlmaLinux 9 shows a warning:

• The following Apache modules are not installed on the destination server: http2, lua, php7, proxy_http2.
• The following Apache modules are disabled on the destination server: sysenv.

Cause

These modules are outdated or rarely used, that's why Apache on AlmaLinux does not have them enabled by default.

Resolution

All of these modules can be safely ignored, you can proceed with migration without installing them:

• http2, proxy_http2 - HTTP/2 is not supported by Plesk for Apache - we use Nginx to accept requests which already supports HTTP/2 and it just proxy requests back to Apache. With such implementation scheme, separate module for Apache is not needed.
• lua - is a module used specifically to serve scripts with lua language. If you are not sure whenever you have such scripts, 99% you are not using it and there is no need to install it.
• php7 - is an Apache module for PHP7 - it is outdated and not recommended for usage. If you have some of the websites using PHP 7, we recommend installing PHP7 provided by Plesk as per instructions here.
• sysenv - this module is used for Outgoing Mail Control for websites that use mod_php or mod_perl. mod_php is disabled by default since Plesk 12.5, therefore if you are migrating from Plesk 17.x of higher you most likely don't need this module. If required, you can enable it under Tools & Settings > Apache Web Server.