v0.12.34,v0.12,stable,latest(v0.12/alpine/Dockerfile)v0.12.34-onbuild,v0.12-onbuild,stable-onbuild,onbuild(v0.12/alpine-onbuild/Dockerfile)v0.12.34-debian,v0.12-debian,stable-debian,debian(v0.12/debian/Dockerfile)v0.12.34-debian-onbuild,v0.12-debian-onbuild,stable-debian-onbuild,debian-onbuild(v0.12/debian-onbuild/Dockerfile)v0.14.14,v0.14,edge(v0.14/alpine/Dockerfile)v0.14.14-onbuild,v0.14-onbuild,edge-onbuild(v0.14/alpine-onbuild/Dockerfile)v0.14.14-debian,v0.14-debian,edge-debian(v0.14/debian/Dockerfile)v0.14.14-debian-onbuild,v0.14-debian-onbuild,edge-debian-onbuild(v0.14/debian-onbuild/Dockerfile)
Fluentd is an open source data collector, which lets you unify the data collection and consumption for a better use and understanding of data.
To create endpoint that collectc logs on your host just run:
docker run -d -p 24224:24224 -p 24224:24224/udp -v /data:/fluentd/log fluent/fluentdDefault configurations are to:
- listen port
24224for Fluentd forward protocol - store logs with tag
docker.**into/fluentd/log/docker.*.log(and symlinkdocker.log) - store all other logs into
/fluentd/log/data.*.log(and symlinkdata.log)
Environment variable below are configurable to control how to execute fluentd process:
This variable allows you to specify configuration file name that will be used
in -c Fluentd command line option.
If you want to use your own configuration file (without any optional plugins),
you can do it with this environment variable and Docker volumes (-v option
of docker run).
- Write configuration file with filename
yours.conf. - Execute
docker runwith-v /path/to/dir:/fluentd/etcto share/path/to/dir/yours.confin container, and-e FLUENTD_CONF=yours.confto read it.
Use this variable to specify other Fluentd command line options,
like -v or -q.
This image is based on the popular Alpine Linux project, available in the alpine official image. Alpine Linux is much smaller than most distribution base images (~5MB), and thus leads to much slimmer images in general.
Since v0.12.26, tags are separated into vX.Y.Z and vX.Y.Z-onbuild.
Latest version of stable Fluentd branch (currently v0.12).
Latest version of edge Fluentd branch (currently v0.14).
Latest version of vX.Y Fluentd branch.
Concrete vX.Y.Z version of Fluentd.
This image makes building derivative images easier.
See "How to build your own image" section for
more details.
The image based on Debian Linux image.
You may use this image when you require plugins which cannot be installed
on Alpine (like fluent-plugin-systemd).
You can build a customized image based on Fluentd's onbuild image.
Customized image can include plugins and fluent.conf file.
We will use this directory to build a Docker image. Type following commands on a terminal to prepare a minimal project first:
# Create project directory.
mkdir custom-fluentd
cd custom-fluentd
# Download default fluent.conf. this file will be copied to the new image.
curl https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/fluent.conf > fluent.conf
# Create plugins directory. plugins scripts put here will be copied to the new image.
mkdir plugins
# Download sample Dockerfile.
curl https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/Dockerfile.sample > DockerfileDocumentation of fluent.conf is available at docs.fluentd.org.
You can install Fluentd plugins using Dockerfile.
Sample Dockerfile installs fluent-plugin-elasticsearch and
fluent-plugin-record-reformer.
To add plugins, edit Dockerfile as following:
FROM fluent/fluentd:onbuild
USER root
RUN apk add --update --virtual .build-deps \
sudo build-base ruby-dev \
# cutomize following instruction as you wish
&& sudo -u fluent gem install \
fluent-plugin-elasticsearch \
fluent-plugin-record-reformer \
&& sudo -u fluent gem sources --clear-all \
&& apk del .build-deps \
&& rm -rf /var/cache/apk/* \
/home/fluent/.gem/ruby/2.3.0/cache/*.gem
USER fluent
EXPOSE 24284FROM fluent/fluentd:debian-onbuild
USER root
RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev" \
&& apt-get update \
&& apt-get install -y --no-install-recommends $buildDeps \
# cutomize following instruction as you wish
&& sudo -u fluent gem install \
fluent-plugin-elasticsearch \
fluent-plugin-record-reformer \
&& sudo -u fluent gem sources --clear-all \
&& SUDO_FORCE_REMOVE=yes \
apt-get purge -y --auto-remove \
-o APT::AutoRemove::RecommendsImportant=false \
$buildDeps \
&& rm -rf /var/lib/apt/lists/* \
/home/fluent/.gem/ruby/2.3.0/cache/*.gem
USER fluentThese example run apk add/apt-get install to be able to install
Fluentd plugins which require native extensions (they are removed immediately
after plugin installation).
If you're sure that plugins don't include native extensions, you can omit it
to make image build faster.
Use docker build command to build the image.
This example names the image as custom-fluentd:latest:
docker build -t custom-fluentd:latest ./Once the image is built, it's ready to run.
Following commands run Fluentd sharing ./log directory with the host machine:
mkdir log
docker run -it --rm --name custom-docker-fluent-logger -v `pwd`/log:/fluentd/log custom-fluentd:latestOpen another terminal and type following command to inspect IP address. Fluentd is running on this IP address:
docker inspect -f '{{.NetworkSettings.IPAddress}}' custom-docker-fluent-loggerLet's try to use another docker container to send its logs to Fluentd.
docker run --log-driver=fluentd --log-opt fluentd-address=FLUENTD.ADD.RE.SS:24224 python:alpine echo Hello
# and force flush buffered logs
docker kill -s USR1 custom-docker-fluent-logger(replace FLUENTD.ADD.RE.SS with actual IP address you inspected at
the previous step)
You will see some logs sent to Fluentd.
Fluentd logging driver - Docker Docs
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If you have any problems with or questions about this image, please contact us through a GitHub issue.