Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on.
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$ docker run --name fluentd bitnami/fluentd:latest
You can find the available configuration options in the Environment Variables section.
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Subscribe to project updates by watching the bitnami/fluentd GitHub repo.
The recommended way to get the Bitnami Fluentd Docker Image is to pull the prebuilt image from the Docker Hub Registry.
$ docker pull bitnami/fluentd:latest
To use a specific version, you can pull a versioned tag. You can view the list of available versions in the Docker Hub Registry.
$ docker pull bitnami/fluentd:[TAG]
If you wish, you can also build the image yourself.
$ docker build -t bitnami/fluentd:latest 'https://github.com/bitnami/bitnami-docker-fluentd.git#master:1/debian-11'
Using Docker container networking, a different server running inside a container can easily be accessed by your application containers and vice-versa.
Containers attached to the same network can communicate with each other using the container name as the hostname.
$ docker network create fluentd-network --driver bridge
Use the --network <NETWORK>
argument to the docker run
command to attach the container to the fluentd-network
network.
$ docker run --name fluentd-node1 --network fluentd-network bitnami/fluentd:latest
We can launch another containers using the same flag (--network NETWORK
) in the docker run
command. If you also set a name to your container, you will be able to use it as hostname in your network.
To create an endpoint that collects logs on your host just run:
$ docker run -d -p 24224:24224 -p 24224:24224/udp -v /data:/opt/bitnami/fluentd/log fluentd
Default configurations are:
- configuration file at
/opt/bitnami/fluentd/conf/fluentd.conf
- listen port
24224
for Fluentd forward protocol - store logs with tag
docker.**
into/opt/bitnami/fluentd/log/docker.*.log
- store all other logs into
/opt/bitnami/fluentd/log/data.*.log
You can overwrite the default configuration file by mounting your own configuration file on the directory /opt/bitnami/fluentd/conf
:
$ docker run --name fluentd -v /path/to/fluentd.conf:/opt/bitnami/fluentd/conf/fluentd.conf bitnami/fluentd:latest
You can also do this by changing the docker-compose.yml
file present in this repository:
fluentd:
...
volumes:
- /path/to/fluentd.conf:/opt/bitnami/fluentd/conf/fluentd.conf
...
You can also extend the default configuration by importing your custom configuration with the "@include" directive. It is a simple as creating a directory with you custom config files and mount it on the directory /opt/bitnami/fluentd/conf/conf.d
:
$ docker run --name fluentd -v /path/to/custom-conf-directory:/opt/bitnami/fluentd/conf/conf.d bitnami/fluentd:latest
You can also do this by changing the docker-compose.yml
file present in this repository:
fluentd:
...
volumes:
- /path/to/custom-conf-directory:/opt/bitnami/fluentd/conf/conf.d
...
Find more information about this feature, consult official documentation
Environment variable below are configurable to control how to execute fluentd process:
FLUENTD_CONF
: 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 ofdocker run
).FLUENTD_OPT
: Use this variable to specify other Fluentd command line options, like -v or -q.FLUENTD_DAEMON_USER
: The user that will run thefluentd
process when the container is run as root.FLUENTD_DAEMON_GROUP
: The group of the user that will run thefluentd
process when the container is run as root.
The Bitnami fluentd Docker image sends the container logs to the stdout
. To view the logs:
$ docker logs fluentd
You can configure the containers logging driver using the --log-driver
option if you wish to consume the container logs differently. In the default configuration docker uses the json-file
driver.
The Bitnami Fluentd Open Source Docker image is built using a Dockerfile with the structure below:
FROM bitnami/minideb
...
COPY prebuildfs /
## Install required system packages and dependencies
RUN install_packages xxx yyy zzz
RUN . /opt/bitnami/scripts/libcomponent.sh && component_unpack "ruby" "a.b.c-0"
RUN . /opt/bitnami/scripts/libcomponent.sh && component_unpack "fluentd" "d.e.f-0"
...
COPY rootfs /
RUN /opt/bitnami/scripts/fluentd/postunpack.sh
...
ENV BITNAMI_APP_NAME="fluentd" ...
EXPOSE 24224 5140
WORKDIR /opt/bitnami/fluentd
USER 1001
...
ENTRYPOINT [ "/opt/bitnami/scripts/fluentd/entrypoint.sh" ]
CMD [ "/opt/bitnami/scripts/fluentd/run.sh" ]
The Dockerfile has several sections related to:
- Components installation
- Components static configuration
- Environment variables
- Ports to be exposed
- Working directory and user
- Note that once the user is set to 1001, unprivileged commands cannot be executed any longer.
- Entrypoint and command
- Take into account that these actions are not executed until the container is started.
The Bitnami Fluentd Open Source Docker image is designed to be extended so it can be used as the base image for your custom Fluentd containers.
Note: Read the previous section to understand the Dockerfile structure before extending this image.
Before extending this image, please note there are certain configuration settings you can modify using the original image:
- Settings that can be adapted using environment variables. For instance, you can modify the Fluentd command-line options setting the environment variable
FLUENTD_OPT
. - Replacing the default configuration file by mounting your own configuration file .
If your desired customizations cannot be covered using the methods mentioned above, extend the image. To do so, create your own image using a Dockerfile with the format below:
FROM bitnami/fluentd
### Put your customizations below
...
Here is an example of extending the image installing custom Fluentd plugins:
FROM bitnami/fluentd
### Install custom Fluentd plugins
RUN fluent-gem install 'fluent-plugin-docker_metadata_filter'
Bitnami provides up-to-date versions of fluentd, including security patches, soon after they are made upstream. We recommend that you follow these steps to upgrade your container.
$ docker pull bitnami/fluentd:latest
Stop the currently running container using the command
$ docker stop fluentd
Next, take a snapshot of the persistent volume /path/to/fluentd-persistence
using:
$ rsync -a /path/to/fluentd-persistence /path/to/fluentd-persistence.bkp.$(date +%Y%m%d-%H.%M.%S)
You can use this snapshot to restore the database state should the upgrade fail.
$ docker rm -v fluentd
Re-create your container from the new image, restoring your backup if necessary.
$ docker run --name fluentd bitnami/fluentd:latest
We'd love for you to contribute to this container. You can request new features by creating an issue, or submit a pull request with your contribution.
If you encountered a problem running this container, you can file an issue. For us to provide better support, be sure to include the following information in your issue:
- Host OS and version
- Docker version (
docker version
) - Output of
docker info
- Version of this container
- The command you used to run the container, and any relevant output you saw (masking any sensitive information)
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Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.