/ocsreports/install.php not running

Question

Good day.

Installed OCS 2.9.1

But, When trying to run

http://server_name/ocsreports/install.php

in browser window does not appear  OCS Inventory Installation - simply white background.

Apache24 in access log:

[05/Oct/2021:11:17:58 +0300] "GET /ocsreports/install.php HTTP/1.1" 500 -

Apache24 error log:
proxy_fcgi:error] [pid 6889:tid 34438453248]  AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught Error: Call to undefined function session_start() in /usr/share/ocsinventory-reports/ocsreports/require/function_commun.php:23\nStack trace:\n#0 /usr/share/ocsinventory-reports/ocsreports/install.php(26): require_once()\n#1 {main}\n  thrown in /usr/share/ocsinventory-reports/ocsreports/require/function_commun.php on line 23'

How resolved?

Answer 1

Launched the database.

Connected via browser to OCS Inventory.

But in ocsinventory.log on Windows computer error :

COM SERVER => HTTP Post response received <HTTP Status Code #400>

Inventory fails.

Answer 2

As you can read, OCS is 2 server (services) :
- Communication Server (/ocsinventory) : to receive inventory from agents, based on Perl module

- Administrative Server (/ocsreports) : to manage, search, deploy, based on Php module

Each of this 2 servives write and read the database (MySQL/MariaDB).

So you need to have ALL prerequesites for Apache2, MySQL/MariaDB, Perl, Php.

After installation of OCS, you need to (in this order)
- create database, user, rights

- install tables in database = first launch of ocsreports (Administrative Server)

- set the database identifiants in the conf for Communication Server (z-ocsinventory.conf)

- install an agent and launch it (the agent connect to Communication Server)

Answer 3

All this is done and tested.

The inventory just doesn't go through.

Answer 4

error 400 means that server version is lower than agent version. Verify both versions.

Answer 5

Software from Web console -Server Information

PHP Version :

• Web Server :
• Database Server :
• Version OCSReports:

• 7.4.23
• Apache/2.4.49 (FreeBSD) OpenSSL/1.1.1h-freebsd mod_perl/2.0.11 Perl/v5.32.1
• FreeBSD Ports version 10.4.21-MariaDB
• 2.9.1

AGENT => Using Communication Provider <OCS Inventory cURL Communication Provider> Version <2.9.0.0>

from ocsinventory.log.

Answer 6

What permissions should be on the main directories?

And where is alias /inventory?

Answer 7

It's enough for me. I leave this question. Sorry, I can't continue to try help.

IMHO, using Debian and any of tuto on Internet, you can run an OCS server in hours (not in days or weeks).