$ fluentd -c in_http.conf
2019-12-16 19:07:39 +0900 [info]: parsing config file is succeeded path="in_http.conf"
2019-12-16 19:07:39 +0900 [info]: gem 'fluentd' version '1.8.0'
2019-12-16 19:07:39 +0900 [info]: using configuration file: <ROOT>
2019-12-16 19:07:39 +0900 [info]: starting fluentd-1.8.0 pid=44435 ruby="2.4.6"
2019-12-16 19:07:39 +0900 [info]: spawn command to main: cmdline=["/path/to/ruby", "-Eascii-8bit:ascii-8bit", "/path/to/fluentd", "-c", "in_http.conf", "--under-supervisor"]
2019-12-16 19:07:40 +0900 [info]: adding filter pattern="test.cycle" type="grep"
2019-12-16 19:07:40 +0900 [info]: adding match pattern="test.cycle" type="stdout"
2019-12-16 19:07:40 +0900 [info]: adding source type="http"
2019-12-16 19:07:40 +0900 [info]: #0 starting fluentd worker pid=44448 ppid=44435 worker=0
2019-12-16 19:07:40 +0900 [info]: #0 fluentd worker is now running worker = 0
2019-12-16 19:08:06.934660000 +0900 test.cycle: {"action":"login","user":2}