source 'https://rubygems.org' gem 'fluentd', '~>0.12.32' gem 'activesupport', '~>4.2.6' gem 'fluent-plugin-kubernetes_metadata_filter', '~>0.27.0' gem 'fluent-plugin-elasticsearch', '~>1.9.5' gem 'fluent-plugin-systemd', '~>0.0.8' gem 'fluent-plugin-prometheus', '~>0.3.0' gem 'oj', '~>2.18.1'