Issue with sessions

[vityav]

Hello,
I've installed cacti on arch linux following these instructions: https://wiki.archlinux.org/index.php/Cacti

I get all the way to the initial login page, but attempting to login as admin/admin doesn't work. No red text like with a bad login, and logs say I'm successfully authenticated, it just refreshes the login page. I saw on here how it's likely a problem with sessions, which my server logs seem to support, but I do have sessions enabled and passing some basic tests. The specific error I get in apache:

Code: Select all

[Fri Feb 03 02:31:16.719121 2017] [php7:warn] [pid 2519] [client 127.0.0.1:42492] PHP Warning:  session_start(): Failed to read session data: user (path: /tmp) in /usr/share/webapps/cacti/include/global.php on line 253, referer: http://127.0.0.1/cacti/index.php

But /tmp is definitely world read/write/executable, and running these two tests for sessions and cookies inside the cacti directory both come back saying they're supported:
https://dodona.wordpress.com/2008/08/26 ... -sessions/
https://stackoverflow.com/questions/666 ... re-enabled

Does anyone here have any insight as to what session_start might be doing differently for cacti, or what the "session data: user" might alude to that I can check?

System Info:
Arch Linux 4.8.12
Cacti version: 1.0.0
Apache 2.4.25
PHP 7.1.1
MariaDB 15.1

Thanks

[Osiris]

PHP 7.1 is not supported. There was a major change in session handling in php7.1 that has not been addressed in Cacti.