Image Overview: fluent-bit

Overview: fluent-bit Chainguard Image

Fluent Bit is a lightweight and high performance log processor.

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The image is available on

docker pull

Using fluent-bit

Run a Fluent Bit instance that will receive messages over TCP port 24224 through the Forward protocol, and send the messages to the STDOUT interface in JSON format every second:

docker run -p /usr/bin/fluent-bit -i forward -o stdout -p format=json_lines -f 1

Now run a separate container that will send a test message. This time the Docker container will use the Fluent Forward Protocol as the logging driver:

docker run --log-driver=fluentd -t ubuntu echo "Testing a log message"

On Fluent Bit container, it will print to stdout something like this:

Fluent Bit v2.0.8
* Copyright (C) 2015-2022 The Fluent Bit Authors
* Fluent Bit is a CNCF sub-project under the umbrella of Fluentd

[2023/01/20 01:37:06] [ info] [fluent bit] version=2.0.8, commit=, pid=1
[2023/01/20 01:37:06] [ info] [storage] ver=1.4.0, type=memory, sync=normal, checksum=off, max_chunks_up=128
[2023/01/20 01:37:06] [ info] [cmetrics] version=0.5.8
[2023/01/20 01:37:06] [ info] [ctraces ] version=0.2.7
[2023/01/20 01:37:06] [ info] [input:forward:forward.0] initializing
[2023/01/20 01:37:06] [ info] [input:forward:forward.0] storage_strategy='memory' (memory only)
[2023/01/20 01:37:06] [ info] [input:forward:forward.0] listening on
[2023/01/20 01:37:06] [ info] [sp] stream processor started
[2023/01/20 01:37:06] [ info] [output:stdout:stdout.0] worker #0 started
{"date":1674178633.0,"container_id":"c77d18c7700cc8e552b1f137ec9e6cd922637c733463e38fc97de7d51a95e4e9","container_name":"/nice_morse","source":"stdout","log":"Testing a log message\r"}

Using the fluent-bit Helm Chart

You can deploy fluent-bit as a Helm chart by running the following:

helm repo add fluent
helm repo update

Next, we can install it with the following command:

helm upgrade --install fluent-bit \
    --set \
    --set image.tag=latest \
    --set command="/usr/bin/fluent-bit" \

Last updated: 2024-04-11 12:38