Upgrade Debian - apache2 crashes

[Centaurus17]

Hi,

because I did not get an answere to my question here I tried to upgrade my system from Debian 11 -> 12. After the upgrade the system shows an error-message at booting 'failed to start apache2.service' - but zm seems to run (the process is running and the cpu-load is suitable). But apache2 is not running, so I have no access to zm.

In var/log/apache2 I found an error.log:

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[Tue Sep 24 00:00:29.184706 2024] [mpm_prefork:notice] [pid 625:tid 625] AH00163: Apache/2.4.62 (Debian) configured -- resuming normal operations
[Tue Sep 24 00:00:29.184733 2024] [core:notice] [pid 625:tid 625] AH00094: Command line: '/usr/sbin/apache2'
[Tue Sep 24 08:18:57.872672 2024] [mpm_prefork:notice] [pid 625:tid 625] AH00170: caught SIGWINCH, shutting down gracefully
[Tue Sep 24 09:35:44.000791 2024] [mpm_prefork:notice] [pid 619:tid 619] AH00163: Apache/2.4.62 (Debian) configured -- resuming normal operations
[Tue Sep 24 09:35:44.001369 2024] [core:notice] [pid 619:tid 619] AH00094: Command line: '/usr/sbin/apache2'
[Tue Sep 24 10:49:55.017195 2024] [mpm_prefork:notice] [pid 619:tid 619] AH00169: caught SIGTERM, shutting down

Any hints? Please help to fix this...

Thx

[iconnor]

Those are normal messages.

How about trying sudo systemctl start apache2
For further debugging systemctl status apache2
or journalctl -fu apache2

[Centaurus17]

One step forward:

• First apache2 did not run - apache2 error.log: 'caught SIGTERM, shutting down' ... this I could fix.
• Apache2 is now running ... but the zm-console does not work - 'htt*://IP#/zm/' brings a lot of debugging infos.
• There are 2 Versions of php - 7.4 and 8.2 - in the system ... maybe there is something mixed up between this versions.?
• 'sudo journalctl -u apache2 --no-pager' shows e.g.:

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  Sep 24 11:59:01 debian systemd[1]: Starting apache2.service - The Apache HTTP Server...
  Sep 24 11:59:01 debian apachectl[3405]: apache2: Syntax error on line 146 of /etc/apache2/apache2.conf: Syntax error on line 3 of /etc/apache2/mods-enabled/php7.4.load: Cannot load /usr/lib/apache2/modules/libphp7.4.so into server: /usr/lib/apache2/modules/libphp7.4.so: cannot open shared object file: No such file or directory
  Sep 24 11:59:01 debian apachectl[3402]: Action 'start' failed.
  Sep 24 11:59:01 debian apachectl[3402]: The Apache error log may have more information.
  Sep 24 11:59:01 debian systemd[1]: apache2.service: Control process exited, code=exited, status=1/FAILURE
  Sep 24 11:59:01 debian systemd[1]: apache2.service: Failed with result 'exit-code'.
  Sep 24 11:59:01 debian systemd[1]: Failed to start apache2.service - The Apache HTTP Server.
  ...
  Sep 24 16:07:46 debian apachectl[47850]: AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName' directive globally to suppress this message
  ...
  

Apache2-error.log:

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[Tue Sep 24 18:36:49.270580 2024] [mpm_prefork:notice] [pid 701:tid 701] AH00170: caught SIGWINCH, shutting down gracefully
[Tue Sep 24 18:37:32.480681 2024] [mpm_prefork:notice] [pid 697:tid 697] AH00163: Apache/2.4.62 (Debian) configured -- resuming normal operations
[Tue Sep 24 18:37:32.483019 2024] [core:notice] [pid 697:tid 697] AH00094: Command line: '/usr/sbin/apache2'

???

[iconnor]

apache is still trying to use php7.4 but it is mostly missing. I would start by sudo apt remove --purge php7.4*
Then sudo a2dismod php7.4
sudo a2enmod php8.2

Then apache should run

[Centaurus17]

Thanks ... done ... I got the following messages:

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ich@debian:~$ sudo a2dismod php7.4
Module php7.4 already disabled
ich@debian:~$ sudo a2enmod php8.2
Considering dependency mpm_prefork for php8.2:
Considering conflict mpm_event for mpm_prefork:
Considering conflict mpm_worker for mpm_prefork:
Module mpm_prefork already enabled
Considering conflict php5 for php8.2:
Module php8.2 already enabled
ich@debian:~$ sudo service apache2 restart

... apache2 is running ... now the console-screen is shown with 'h*tp://IP#/zm/' ... but it is not formatted, no graphic-buttons, no lines, it is incomplete ... screenshot:

[Centaurus17]

FYI: I made a backstep and restored the running Debian-11-installation (to be on safe I cloned the system with Clonezilla before upgrading zu Debian-12). I will try a clean installation (Deb 12 + zm) soon...

Thanks.