2. Find a config for kafka

There are several example config files for each applications. I can find a kafka config in the github. I used kafka 2_0_0 version because I'm currently learning 2.x.x.

https://github.com/prometheus/jmx_exporter/blob/main/example_configs/kafka-2_0_0.yml

curl -O https://raw.githubusercontent.com/prometheus/jmx_exporter/main/example_configs/kafka-2_0_0.yml

I put config file inside config directory. I'm not sure this is recommended place.