oned fails with segfault being unable to read monitord configuration file

[OpenNebulaSupport]

Description
oned fails with segfault if the /etc/one/monitord.conf file can not be read by oneadmin user.

The message from the system log (/var/log/message in case of RHEL-based distro and /var/log/syslog in case of Debian-based one):
Ubuntu 22.04:
Aug 8 09:35:17 <host> kernel: [193417.063587] oned[555688]: segfault at 560428f3b39c ip 0000560147e09bcf sp 00007fdb64ff8a50 error 4 in oned[560147da5000+2b1000]

RHEL 7:
Aug 8 09:24:53 <host> kernel: oned[4357]: segfault at 55b71e3b4760 ip 000055b71e3b4760 sp 00007ffb41ffac98 error 15

To Reproduce

systemctl stop opennebula.service

ls -al /etc/one/monitord.conf 
-rw-r-----. 1 root oneadmin 8952 Nov 24  2023 /etc/one/monitord.conf

chgrp root /etc/one/monitord.conf

ls -al /etc/one/monitord.conf 
-rw-r-----. 1 root root 8952 Nov 24  2023 /etc/one/monitord.conf

systemctl start opennebula.service
Job for opennebula.service failed because a fatal signal was delivered to the control process. See "systemctl status opennebula.service" and "journalctl -xe" for details.

Check system logs for oned segfault.

Details

• Affected Component: Core
• Version: shows up on one-6.4.5 on CentOS 7 and one-6.8.3 on ubuntu 22.04.

Progress Status

• Code committed
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)

[paczerny]

Note: Double check that after restart of onemonitord, the monitoring is working correctly (including HA deployments)