fluent.conf

<source>
  @type tail
  path /var/lib/rkt/pods/run/*/stage1/rootfs/opt/stage2/hyperkube/rootfs/var/log/containers/*.log
  pos_file Fluentd-docker.pos
  time_format %Y-%m-%dT%H:%M:%S
  tag kubernetes.*
  format json
  read_from_head true
</source>

<filter kubernetes.**>
  @type kubernetes_metadata
</filter>

<match kubernetes.*.fluentd*>
  @type null
</match>

<match **>
  type http_ext
  endpoint_url          "#{ENV['SUMOLOGIC_URL']}"
  serializer            json                                 # default: form
  open_timeout          5                                    # default: nil = no timeout
  read_timeout          10                                   # default: 60
  raise_on_error        false                                # default: true
  raise_on_http_failure true                                 # default: false
  ignore_http_status_code 300,400..499                       # default: nil # do not raise on these http_hstatus codes
  use_ssl               true                                 # default: false
</match>