As soon as Nagios is managed by systemd, you have to change the passing environment variables from /etc/sysconfig/nagios to systemd
Edit the file
$ vi /etc/systemd/system/multi-user.target.wants/nagios.service
Add Environment=”” or EnvironmentFile=”” to [service] section
[Service]
Type=forking
ExecStartPre=/usr/sbin/nagios -v /etc/nagios/nagios.cfg
ExecStart=/usr/sbin/nagios -d /etc/nagios/nagios.cfg
ExecStop=/usr/bin/kill -s TERM ${MAINPID}
ExecStopPost=/usr/bin/rm -f /var/spool/nagios/cmd/nagios.cmd
ExecReload=/usr/bin/kill -s HUP ${MAINPID}
Environment="PYTHONHTTPSVERIFY=1"
Restart systemd and nagios
$ sudo systemctl daemon-reload $ sudo systemctl restart nagios
Check the process environment
$ cat /proc/30195/environ LANG=en_US.UTF-8PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/binPYTHONHTTPSVERIFY=1 $
That will pass all variables into Nagios daemon
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Let me know if you have any issues with monitoring. Will be glad to help 🙂