use Fatalf instead of panic
use Fatalf instead of panic

kangwoo/prometheus,Conorbro/prometheus,amorken/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,Stackdriver/stackdriver-prometheus,Conorbro/prometheus,GoogleCloudPlatform/prometheus,brancz/prometheus,Stackdriver/stackdriver-prometheus,prometheus/prometheus,alileza/prometheus,amorken/prometheus,alileza/prometheus,amorken/prometheus,prometheus/prometheus,alileza/prometheus,Conorbro/prometheus,prometheus/prometheus,brancz/prometheus,alileza/prometheus,kangwoo/prometheus,brancz/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,brancz/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,kangwoo/prometheus,Stackdriver/stackdriver-prometheus,Stackdriver/stackdriver-prometheus,kangwoo/prometheus,Gouthamve/prometheus,amorken/prometheus,keegancsmith/prometheus,Conorbro/prometheus,prometheus/prometheus,alileza/prometheus,Gouthamve/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,Gouthamve/prometheus