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I want to to retrieve a list of the virtual hosts which are currently loaded and listening for requests i.e not just grepping the config files.
It looks like apache2ctl -S does this but I am not 100% sure if that is just returning what is contained in the config files.
The command a2query -s works perfectly for me.
a2query [-m [MODULES] -s [SITE] -c [CONF] ]
httpd -S because the deamon itself is not called Apache, but httpd.
Apr 24 at 13:54
The apachectl -S documentation says this
-S Show the settings as parsed from the config file (currently only shows the virtualhost settings).
So you will only see those virtualhosts that are loaded in the config which is read when httpd starts.
I didn't found official documentation about it.
The command apache2ctl -S check site-enabled*.conf + httpd.conf files and show you if the syntax is correct and the list of virtual host (and some more informations).
But It doesn't check if virtualhosts are running, you can try to stop your Apache and launch again the command, the result will be the same.
So apache2ctl -S result is based on configuration files.
You can use this command :
apache2ctl -t -D DUMP_VHOSTS
It will list all the enabled websites, the path to the conf file and the port that is used by the website
apache2ctl -S | grep -o -E 'alias (.*)|(namevhost|server) (.*)\s' | cut -d ' ' -f 2
Will output the list of configured domains and aliases
Works fine on Apache/2.4.38 (Debian)
certbot --apache lists 14 names that don't entirely match. apache2ctl only lists the ServerName values, skipping the ServerAlias (while certbot somehow knew to skip the vhosts I had explicitly broken by prepending the domain name with xxx_)