Nagios Support Forum

Good morning,

Came into work this week and now the Nagios Log Server Login takes my admin username and pass (which I also reset via SSH) but then just goes back to the login, doesn't log me in.

Any ideas ? reboots does nothing

systemctl status httpd
● httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; preset: disabled)
Drop-In: /usr/lib/systemd/system/httpd.service.d
└─php-fpm.conf
Active: active (running) since Mon 2026-03-23 06:53:32 CDT; 35min ago
Docs: man:httpd.service(8)
Main PID: 950 (httpd)
Status: "Total requests: 28; Idle/Busy workers 100/0;Requests/sec: 0.0131; Bytes served/sec: 84 B/sec"
Tasks: 230 (limit: 48665)
Memory: 17.3M (peak: 23.1M)
CPU: 1.356s
CGroup: /system.slice/httpd.service
├─ 950 /usr/sbin/httpd -DFOREGROUND
├─1002 /usr/sbin/httpd -DFOREGROUND
├─1003 /usr/sbin/httpd -DFOREGROUND
├─1004 /usr/sbin/httpd -DFOREGROUND
├─1015 /usr/sbin/httpd -DFOREGROUND
└─1803 /usr/sbin/httpd -DFOREGROUND

Mar 23 06:53:32 NagiosLogServer systemd[1]: Starting The Apache HTTP Server...
Mar 23 06:53:32 NagiosLogServer httpd[950]: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, usi>
Mar 23 06:53:32 NagiosLogServer httpd[950]: Server configured, listening on: port 80
Mar 23 06:53:32 NagiosLogServer systemd[1]: Started The Apache HTTP Server.

The first question I have is always going to be what version of Nagios Log Server are you on?

The second question I have is how doe your disc space look on your system? If the disc gets full beyond a certain threshold, the database can automatically stop accepting writes, so even though your login might have been successful, the session information may not have gotten stored preventing subsequent page views from being able to validat eit.

Thank you for your suggestions .It's not a space issue, there was an issue but that has been resolved. it appears to be a complex web server issue, working through steps to resolve. Once I get logged back into the GUI I should be able to setup log rotation and add more disks. Thank again for your suggestions.

Let me know if its anything that we can work on our end to alleviate going forward, or if its something more specific to your environment.