When I run logstash, its not reading /etc/logstash/conf.d/logstash.conf file

Elastic Stack Logstash
1

when I run logstash,
systemctl start logstash,
its not reading /etc/logstash/conf.d/logstash.conf file, and I gave 777 permissions owner is root. I dont see any error but not seeing any output

If I run /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/logstash.conf , its just work fine.

Could you please help me out?

Thanks

2

How do you know Logstash isn't reading the file at all? What's in the file?