Steps to reproduce:

1. Base install of RHEL8 on EC2
2. yum update to latest software versions available.
3. sudo rpm -Uvh https://repo.zabbix.com/zabbix/6.0/rhel/8/x86_64/zabbix-release-6.0-1.el8.noarch.rpm
4. yum install zabbix-proxy-sqlite3
5. Configure /etc/zabbix/zabbix_proxy.conf
   1. I have only updated Server, Hostname, and DBName
6. Zabbix proxy fails to start and enters a fail loop

Result:

Per /var/log/zabbix/zabbix_proxy.log

  2057:20220303:225659.557 Starting Zabbix Proxy (active) [itsm-test-zabbix6-proxy-rhel8]. Zabbix 6.0.1 (revision a80cb13868).
  2057:20220303:225659.557 **** Enabled features ****
  2057:20220303:225659.557 SNMP monitoring:       YES
  2057:20220303:225659.557 IPMI monitoring:       YES
  2057:20220303:225659.557 Web monitoring:        YES
  2057:20220303:225659.557 VMware monitoring:     YES
  2057:20220303:225659.557 ODBC:                  YES
  2057:20220303:225659.557 SSH support:           YES
  2057:20220303:225659.557 IPv6 support:          YES
  2057:20220303:225659.557 TLS support:           YES
  2057:20220303:225659.557 **************************
  2057:20220303:225659.557 using configuration file: /etc/zabbix/zabbix_proxy.conf
  2057:20220303:225659.571 current database version (mandatory/optional): 06000000/06000000
  2057:20220303:225659.571 required mandatory version: 06000000
  2057:20220303:225659.574 proxy #0 started [main process]
  2058:20220303:225659.575 proxy #1 started configuration syncer #1
  2058:20220303:225704.086 cannot connect to RTC service: Cannot connect to service "rtc": [13] Permission denied.
  2057:20220303:225704.087 One child process died (PID:2058,exitcode/signal:1). Exiting ...
  2057:20220303:225704.583 Zabbix Proxy stopped. Zabbix 6.0.1 (revision a80cb13868).

Per  sudo journalctl -xefu zabbix-proxy

Mar 03 22:57:30 itsm-test-zabbix6-proxy-rhel8 systemd[1]: zabbix-proxy.service: Service RestartSec=10s expired, scheduling restart.
Mar 03 22:57:30 itsm-test-zabbix6-proxy-rhel8 systemd[1]: zabbix-proxy.service: Scheduled restart job, restart counter is at 25.
– Subject: Automatic restarting of a unit has been scheduled
– Defined-By: systemd
– Support: https://access.redhat.com/support
–
– Automatic restarting of the unit zabbix-proxy.service has been scheduled, as the result for
– the configured Restart= setting for the unit.
Mar 03 22:57:30 itsm-test-zabbix6-proxy-rhel8 systemd[1]: Stopped Zabbix Proxy.
– Subject: Unit zabbix-proxy.service has finished shutting down
– Defined-By: systemd
– Support: https://access.redhat.com/support
–
– Unit zabbix-proxy.service has finished shutting down.
Mar 03 22:57:30 itsm-test-zabbix6-proxy-rhel8 systemd[1]: Starting Zabbix Proxy...
– Subject: Unit zabbix-proxy.service has begun start-up
– Defined-By: systemd
– Support: https://access.redhat.com/support
–
– Unit zabbix-proxy.service has begun starting up.
Mar 03 22:57:30 itsm-test-zabbix6-proxy-rhel8 systemd[1]: zabbix-proxy.service: Can't open PID file /run/zabbix/zabbix_proxy.pid (yet?) after start: No such file or directory
Mar 03 22:57:30 itsm-test-zabbix6-proxy-rhel8 systemd[1]: Started Zabbix Proxy.
– Subject: Unit zabbix-proxy.service has finished start-up
– Defined-By: systemd
– Support: https://access.redhat.com/support
–
– Unit zabbix-proxy.service has finished starting up.
–
– The start-up result is done.

Expected:

Zabbix proxy to start successfully