Fluentd GELF forwarder

build.sh

#!/bin/bash

docker build -t fluentd-gelf-forwarder .

Dockerfile

FROM fluent/fluentd:v1.12-debian-1
LABEL Description="Fluentd GELF forwarder"

USER root
RUN gem install fluent-plugin-input-gelf \
 && gem install fluent-plugin-gelf-hs \
 && gem sources --clear-all

COPY ./fluentd.conf /fluentd/etc/
ENV FLUENTD_CONF=fluentd.conf

USER fluent

EXPOSE 12201
EXPOSE 12201/udp

fluentd.conf

<source>
  @type gelf
  tag faas
  bind 0.0.0.0
  port 12201
  protocol_type udp
</source>

<match **>
  @type copy
  <store>
    @type gelf
    host your-graylog-host.com
    port 12201
    protocol tcp
    flush_interval 5s
    max_retry_wait 30
    num_threads 4
  </store>
  <store>
    @type stdout
  </store>
</match>

run.sh

#!/bin/bash

docker run -p 12201:12201/udp -ti fluentd-gelf-forwarder