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--- wiki:nagios_troubleshooting [2022/09/28 09:42] – add Cannot get interface speed... antisa
+++ wiki:nagios_troubleshooting [2024/04/12 14:00] (current) – add undefined reference to `get_dh2048' nrpe antisa
@@ Line 57: / Line 57: @@
 ==== Debian 11 ====
   apt install libapache2-mod-php7.4
+==== Debian 12 ====
+  apt install php8.2-fpm libapache2-mod-php8.2 &&
+  a2enmod php8.2 proxy_fcgi setenvif &&
+  a2enconf php8.2-fpm
 ==== Tested on ====
   * Debian 10 (after upgrade from Debian 9)
+  * Debian 12 (after upgrade from Debian 10 -> 11)
 ===== nagiosgraph js problem =====
@@ Line 87: / Line 94: @@
   check_if_traffic!22!localhost!public!eth0!0,50000!0,75000!-Y -B -k -g2 --label
-====== See also ======
+===== Settings not applied after restart =====
+For example if changing whether or not notifications will be sent, nagios by default [[https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/configmain.html#use_retained_program_state|remembers state]] even after restart, so for [[https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/configmain.html#enable_notifications|notifications]] you will need to change it manually in ///usr/local/nagios/var/retention.dat//.
+You could also remove this file (but first stop nagios and make a backup!) which will force reread of all configs and schedule the check for all hosts and services, so make sure you want this.
+===== undefined reference to `get_dh2048' nrpe =====
+Happened when trying to make install nrpe version 3.2.0 on Debian 12. Used version nrpe 4.1.0.and problem went away.
+===== Cannot write to pidfile '/var/run/nrpe.pid' - check your privileges. =====
+Check the pid in nrpe.cfg and the nrpe.service file, The paths should match there.
+  ~# grep pid /usr/local/nagios/etc/nrpe.cfg
+  pid_file=/var/run/nrpe.pid
+<code>
+systemctl cat nrpe
+# /lib/systemd/system/nrpe.service
+[Unit]
+Description=Nagios Remote Plugin Executor
+Documentation=http://www.nagios.org/documentation
+After=var-run.mount nss-lookup.target network.target local-fs.target time-sync.target
+Before=getty@tty1.service plymouth-quit.service xdm.service
+Conflicts=nrpe.socket
+[Install]
+WantedBy=multi-user.target
+[Service]
+Type=simple
+Restart=on-abort
+PIDFile=/usr/local/nagios/var/nrpe.pid <<--- THIS
+</code>
+Here the fix was to update the nrpe.cfg with the path from systemd file.
+====== See also ======
+  * [[wiki:icinga_troubleshooting|Icinga troubleshooting]]
 ====== References ======
   * https://www.techrepublic.com/article/how-to-fix-apache-2-not-executing-php-files/
   * https://support.nagios.com/forum/viewtopic.php?f=7&t=40351&p=205190#p205190
   * https://serverfault.com/questions/805616/cannot-get-interface-speed-with-standard-mib-use-highperf-mib-g
+  * https://nagios.force.com/support/s/article/Understanding-retention-dat-and-modified-attributes-b41690d9?