Ubuntu Server 22.04 LTS

liv@singularity:~$ sudo zabbix_server -V
zabbix_server (Zabbix) 6.0.5
Revision 8da3e1f8419 30 May 2022, compilation time: May 30 2022 06:40:36

Copyright (C) 2022 Zabbix SIA
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it according to
the license. There is NO WARRANTY, to the extent permitted by law.

This product includes software developed by the OpenSSL Project
for use in the OpenSSL Toolkit (http://www.openssl.org/).

Compiled with OpenSSL 1.1.1f  31 Mar 2020
Running with OpenSSL 1.1.1l  24 Aug 2021

did you try to install PHP PostgreSQL extension?

php-psql.txtStill recieve "Configuration file error.DB type "POSTGRESQL" is not supported by current setup. Possible values MYSQL."

Is Zabbix server 6.0.5 fully compatible with php 8.1?

did you restart apache / php-fpm?

Is Zabbix server 6.0.5 fully compatible with php 8.1?

not fully yet.

Can i install only web-interface on second VPS with Ubuntu Server 22.04 LTS + PHP (latest supported version)?

Sure you can install multiple Frontends.

Followed manual on download page to install FE on php8.1 with new Ubuntu 22.04 server. And there were no issues dsecribed previously.

tested on 6.0.6 FE

What is the cause of error? How can i get web-interface on my VPS now?

Can not reproduce the issue, so it is not clear how you got it.
Probably misconfiguration. As error: Configuration file error.DB type "POSTGRESQL" is not supported by current setup. Possible values MYSQL.
Is possible when zabbix packages for MySQL installed and type defined as postgresql
Check zabbix related packages first:

apt list --installed | grep zabbix

liv@singularity:~$ sudo apt list --installed | grep zabbix
[sudo] пароль для liv:

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

zabbix-agent/now 1:6.0.5-1+ubuntu20.04 amd64 [установлен, локальный]
zabbix-apache-conf/now 1:6.0.5-1+ubuntu20.04 all [установлен, локальный]
zabbix-frontend-php/now 1:6.0.5-1+ubuntu20.04 all [установлен, локальный]
zabbix-release/now 1:6.0-1+ubuntu20.04 all [установлен, локальный]
zabbix-server-pgsql/now 1:6.0.5-1+ubuntu20.04 amd64 [установлен, локальный]
zabbix-sql-scripts/now 1:6.0.5-1+ubuntu20.04 all [установлен, локальный]
zabbix-web-service/now 1:6.0.5-1+ubuntu20.04 amd64 [установлен, локальный]

Это мой стендовый VPS. Я могу запустить вас на сервер для проверки установки zabbix. Напишите, если это нужно и полезно для решения.

Только что выполнил

sudo apt update

sudo apt upgrage

перезагрузил VPS.

Веб-интерфейс заработал!

liv@singularity:~$ sudo apt list --installed | grep zabbix

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

zabbix-agent/now 1:6.0.5-1+ubuntu20.04 amd64 [установлен, локальный]
zabbix-apache-conf/now 1:6.0.5-1+ubuntu20.04 all [установлен, локальный]
zabbix-frontend-php/now 1:6.0.5-1+ubuntu20.04 all [установлен, локальный]
zabbix-release/now 1:6.0-1+ubuntu20.04 all [установлен, локальный]
zabbix-server-pgsql/now 1:6.0.5-1+ubuntu20.04 amd64 [установлен, локальный]
zabbix-sql-scripts/now 1:6.0.5-1+ubuntu20.04 all [установлен, локальный]
zabbix-web-service/now 1:6.0.5-1+ubuntu20.04 amd64 [установлен, локальный]
l

Версии файлов zabbix не изменились?

Same version.
So it was a local package manager issue. Seen somewhat similar before. Maybe it is time to try rpm based distros
Closing the issue as it is not related to zabbix.

Please not that bug portal is international. Using english is mandatory so everyone looking for similar issues could understand posts.

Regards,
Andrey