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Latest commit 1abf257 Jan 11, 2018 @edsiper edsiper in_tail: inotify: double check if IN_ATTRIB is a file deletion
there some cases where unlink(2) triggers a IN_ATTRIB inotify
event (rm command), but also a chmod(2) triggers the same event
leading to a false file deletion.

This patch makes sure that when IN_ATTRIB event is received
checks the stat nlink of the file, if it's zero means it was
a real "deletion".

Signed-off-by: Eduardo Silva <eduardo@treasure-data.com>
Failed to load latest commit information.
bin Initial import. Jan 27, 2015
build Build: add missing build/ directory Jan 29, 2015
cmake build: cmake: new FindMonkey helper Oct 3, 2017
conf conf: document HTTP server interface (disabled by default) Jan 15, 2018
cpack build: CMake: update package info Mar 14, 2017
debian debian: bump to v0.12.4 Sep 25, 2017
documentation Doc: fix URL Jun 2, 2016
examples out_lib: release buffer at user size May 24, 2017
include build: set dependency of FLB_METRICS for FLB_HTTP_SERVER Jan 12, 2018
init init: forward-port systemd init script Nov 2, 2016
lib lib: monkey: sync fifo queue function prototype fixes Jan 12, 2018
plugins in_tail: inotify: double check if IN_ATTRIB is a file deletion Jan 16, 2018
src build: set dependency of FLB_METRICS for FLB_HTTP_SERVER Jan 12, 2018
tests filter_parser: fix reserve_data, add preserve_key Dec 22, 2017
.gitignore git: update ignore file Jul 19, 2017
.travis.yml ci: enable internal tests after build Jul 10, 2017
CMakeLists.txt build: set dependency of FLB_METRICS for FLB_HTTP_SERVER Jan 12, 2018
CONTRIBUTING.md Doc: update Contribution guidelines with License requirements Jun 8, 2015
Dockerfile build: Dockerfile: expose TCP port 2020 Jan 15, 2018
GOLANG_OUTPUT_PLUGIN.md doc: add a Golang output plugin how-to Nov 10, 2016
LICENSE Doc: add reference to Apache License v2.0 Jan 28, 2015
MAINTAINERS.md Doc: add MAINTAINERS.md file May 2, 2017
README.md README: mention syslog and journald input plugins Jan 15, 2018
appveyor.yml CI: Appveyor: disable examples Jan 18, 2017
debian.sh Debian: add packager script Sep 21, 2015
fluent-bit_git.bb OpenEmbedded/Yocto: make fluent-bit recipe use GIT repository for now May 21, 2015
fluentbit_logo.png Doc: Add logo to README Aug 17, 2016
valgrind.supp core: add valgrind suppression error files (dl-open leaks) Sep 22, 2016


Fluent Bit is a Data Forwarder for Linux, Embedded Linux, OSX and BSD family operating systems. It's part of the Fluentd Ecosystem. Fluent Bit allows collection of information from different sources, buffering and dispatching them to different outputs such as Fluentd, Elasticsearch, Nats or any HTTP end-point within others. It's fully supported on x86_64, x86 and ARM architectures.

For more details about it capabilities and general features please visit the official documentation:


Quick Start

$ cd build
$ cmake ..
$ make
$ bin/fluent-bit -i cpu -o stdout


Fluent Bit support the following features through plugins:

Input plugins

name option description
CPU cpu gather CPU usage between snapshots of one second. It support multiple cores
Disk disk usage of block device
Dummy dummy generates dummy event
Exec exec executes external program and collects event logs
Forward forward Fluentd forward protocol
Memory mem usage of system memory
MQTT mqtt start a MQTT server and receive publish messages
Netif netif usage of network interface
Kernel Ring Buffer kmsg read Linux Kernel messages, same behavior as the dmesg command line program
Syslog syslog read messages from a syslog daemon
Systemd/Journald systemd read messages from journald, part of the systemd suite
Serial Port serial read from serial port
Standard Input stdin read from the standard input
Head head read first part of files
Health health check health of TCP services
Process proc check health of Process
Random random generate random numbers
Tail tail tail log files
TCP tcp listen for raw JSON map messages over TCP

Filter Plugins

name option description
Record Modifier record_modifier Append/Remove key-value pair
Grep grep Match or exclude specific records by patterns
Kubernetes kubernetes Enrich logs with Kubernetes Metadata
Stdout stdout Print records to the standard output interface
Parser parser Parse records

Output Plugins

name option description
Counter counter count records
Elasticsearch es flush records to a Elasticsearch server
File file flush records to a file
FlowCounter flowcounter count records and its size
Forward forward flush records to a Fluentd service. On the Fluentd side, it requires an in_forward.
NATS nats flush records to a NATS server
HTTP http flush records to a HTTP end point
InfluxDB influxdb flush records to InfluxDB time series database
Plot plot generate a file for gnuplot
Standard Output stdout prints the records to the standard output stream
Treasure Data td flush records to Treasure Data service (cloud analytics)

Official Documentation

The official documentation of Fluent Bit can be found in the following site:



In order to contribute to the project please refer to the CONTRIBUTING guidelines.


Feel free to join us on our Slack channel, Mailing List or IRC:


This program is under the terms of the Apache License v2.0.


Fluent Bit is made and sponsored by Treasure Data among other contributors.