zabbix_web_service.log not rotated.

• /etc/zabbix/zabbix_web_service.conf

  ### Option: LogFile
  #	Log file name for LogType 'file' parameter.
  #
  # Mandatory: yes, if LogType is set to file, otherwise no
  # Default:
  # LogFile=/tmp/zabbix_web_service.log
  
  LogFile=/var/log/zabbix/zabbix_web_service.log  <-- here!
  
  ### Option: LogFileSize
  

• /etc/logrotate.d/zabbix-web-service

  /var/log/zabbix/zabbix_web-service.log {  <-- here!
  	weekly
  	rotate 12
  	compress
  	delaycompress
  	missingok
  	notifempty
  	create 0664 zabbix zabbix
  }
  

The underscore "_" and hyphen "-" in the file name are different.