Enable http2 on Debian 9 with Apache 2.4.25 & ISPConfig

Hi there!
Since hours I try to enable the http2-module on my Debain-9-Server, running Apache 2.4.25 and ISPConfig 3.1.15.
First of all: The module is successfully loaded, i checked it several times.
Unfortunately there are a lot of tutorials in the web, each of them prefer another way to get http2 enabled - in my case: Nothing work :-(
My first and simple try - Using the Web-Interface of ISPC: Websites -> mydomain.xy -> SSL -> Activate SPDY/HTTP2 (Apache Restart)
Second try - Using Web-Interface again: System -> Severconfig -> Web -> SSL -> SPDY/HTTP2
Third try: Editing the Vhosts for may websites manually:

Code:

<VirtualHost *:443>
Protocols h2 http/1.1
# ...
# ...
</VirtualHost>

Last code I also tried in the global config-files, but nothing worked for me.

Is there anybody who can help?

 

Thanks for replying...
My new problem

Code:

a2dismod mpm_prefork
a2enmod mpm_event
systemctl restart apache2

After these steps my Apache2 will not come up again. Message:

and

Code:

   Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2019-09-05 16:13:22 CEST; 15s ago
  Process: 5723 ExecStop=/usr/sbin/apachectl stop (code=exited, status=1/FAILURE)
  Process: 5736 ExecStart=/usr/sbin/apachectl start (code=exited, status=1/FAILURE)

Can't find useful information in apache2 error.log.

Is there something else I have to do?

 

Have you disabled mod_php? (I think it should have been automatically)
a2dismod mod_php
a2enmod proxy_fcgi
what is the output of "apache2ctl configtest"?
what is the output of "systemctl status apache2.service"
what is the output of "journalctl -xe" after trying to start apache2?

 

systemctl status apache2.service

Code:

apache2.service - The Apache HTTP Server
   Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2019-09-05 17:46:33 CEST; 10s ago
  Process: 23128 ExecStop=/usr/sbin/apachectl stop (code=exited, status=1/FAILURE)
  Process: 11047 ExecReload=/usr/sbin/apachectl graceful (code=exited, status=0/SUCCESS)
  Process: 23136 ExecStart=/usr/sbin/apachectl start (code=exited, status=1/FAILURE)

Sep 05 17:46:33 XXX systemd[1]: Starting The Apache HTTP Server...
Sep 05 17:46:33 XXX apachectl[23136]: AH00534: apache2: Configuration error: No MPM loaded.
Sep 05 17:46:33 XXX apachectl[23136]: Action 'start' failed.
Sep 05 17:46:33 XXX apachectl[23136]: The Apache error log may have more information.
Sep 05 17:46:33 XXX systemd[1]: apache2.service: Control process exited, code=exited status=
Sep 05 17:46:33 XXX systemd[1]: Failed to start The Apache HTTP Server.
Sep 05 17:46:33 XXX systemd[1]: apache2.service: Unit entered failed state.
Sep 05 17:46:33 XXX systemd[1]: apache2.service: Failed with result 'exit-code'.

apache2ctl configtest

Code:

AH00534: apache2: Configuration error: No MPM loaded.
Action 'configtest' failed.
The Apache error log may have more information.

journalctl -xe

Code:

-- Unit apache2.service has finished shutting down.
Sep 05 19:20:35 XXX systemd[1]: apache2.service: Unit entered failed state.
Sep 05 19:20:35 XXX systemd[1]: apache2.service: Failed with result 'exit-code'.
Sep 05 19:20:35 XXX systemd[1]: Starting The Apache HTTP Server...
-- Subject: Unit apache2.service has begun start-up
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- Unit apache2.service has begun starting up.
Sep 05 19:20:35 XXX apachectl[5754]: AH00534: apache2: Configuration error: No MPM loaded.
Sep 05 19:20:35 XXX apachectl[5754]: Action 'start' failed.
Sep 05 19:20:35 XXX apachectl[5754]: The Apache error log may have more information.
Sep 05 19:20:35 XXX systemd[1]: apache2.service: Control process exited, code=exited status=
Sep 05 19:20:35 XXX systemd[1]: Failed to start The Apache HTTP Server.
-- Subject: Unit apache2.service has failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- Unit apache2.service has failed.
--
-- The result is failed.

 

Are you sure "a2enmod mpm_event" worked?
"Configuration error: No MPM loaded" looks like no MPM module is loaded ;-)

 

Yes, that's the fact.
If I do "a2enmod mpm_event" (of course) I get the message:

So I do "a2dismod mpm_prefork" first. After that my Apache2 do not start again, even if i follow up with

Code:

a2enmod mpm_event
// Apache Restart

 

I do not understand, what you did in which order. Do this and post the output:

Code:

a2dismod mod_php
a2dismod mpm_prefork
a2enmod mpm_event
a2enmod proxy_fcgi
apache2ctl configtest
systemctl start apache2

 

Funny... a2dismod mod_php get the following Output: ERROR: Module "mod_php" does not exist!

 

OK... After doing all your steps (post #8) I get the message:

 

it is probably mod_php5 mod_php7.0 mod_php7.2, depending on your system. Use "a2dismod" to see your options. You can also use wildcards like mod_php*

 

OK, here are my choices for "a2dismod":

As you can see, there is only "php5", no "mod_php", no "mod_php5*7*XX" or anything else.
After your steps from Post#8 the configtest outputs:

Code:

AH00548: NameVirtualHost has no effect and will be removed in the next release /etc/apache2/sites-enabled/000-ispconfig.conf:73
AH00526: Syntax error on line 183 of /etc/apache2/sites-enabled/100-MYDOMAIN.com.vhost:
Invalid command 'php_admin_value', perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.

 

The setting in question only works with mod_php. Probably you should change the PHP Version of all your websites to from mod_php to "PHP-FPM" prior to removing mod_php ;-)

 

OK, can I do the change from "mod_php" to "PHP_FPM" by using the Web-Interface from ISPCONFIG? Or is there more to do - manually?

 

If you have installed and set up php_fpm, this should be all you have to do. If not, you have to install php_fpm first and set it up correctly in ispconfig. Try changing one website first and see if everything works. If you have used a recent guide to install ispconfig, everything should be set up already.

 

Thanks for your engagement
But it's still not working. My steps.

1. Changed my Website Configuration in ISPConfig-Webinterface from "mod_php" to "PHP-FPM"
2. Checking phpinfo(); - seems to be ok, it shows: Server API FPM/FastCGI
3. Activated "SPDY/HTTP2" in ISPConfig for my Website in SSL-Configurations.

General Info: The Website works fine, but elements still served via HTTP1.1 (checked via Chrome-Developer-Console)

 

apachectl -M | grep http2_module

Code:

AH00548: NameVirtualHost has no effect and will be removed in the next release /etc/apache2/sites-enabled/000-ispconfig.conf:73
AH00180: WARNING: MaxRequestWorkers of 300 exceeds ServerLimit value of 256 servers, decreasing MaxRequestWorkers to 256. To increase, please see the ServerLimit directive.
 http2_module (shared)

EDIT: Maybe it's a problem with the message I posted on #10 in this timeline?

 

OK, fixed the Warning. New Output:

Code:

AH00548: NameVirtualHost has no effect and will be removed in the next release /etc/apache2/sites-enabled/000-ispconfig.conf:73
 http2_module (shared)