Debian

Fluent Bit is distributed as the fluent-bit package and is available for the latest stable CentOS system.

The following architectures are supported

• x86_64

• aarch64

• arm64v8

Single line install

Fluent Bit provides an installation script to use for most Linux targets. This will always install the most recently released version.

curl https://raw.githubusercontent.com/fluent/fluent-bit/master/install.sh | sh

This is a convenience helper and should always be validated prior to use. The recommended secure deployment approach is to use the following instructions:

Server GPG key

The first step is to add the Fluent Bit server GPG key to your keyring to ensure you can get the correct signed packages.

Follow the official Debian wiki guidance.

curl https://packages.fluentbit.io/fluentbit.key | gpg --dearmor > /usr/share/keyrings/fluentbit-keyring.gpg

Updated key from March 2022

For the 1.9.0 and 1.8.15 and later releases, the GPG key has been updated. Ensure this new one is added.

The GPG Key fingerprint of the new key is:

C3C0 A285 34B9 293E AF51  FABD 9F9D DC08 3888 C1CD
Fluentbit releases (Releases signing key) <[e-mail]>

The previous key is still available and might be required to install previous versions.

The GPG Key fingerprint of the old key is:

F209 D876 2A60 CD49 E680 633B 4FF8 368B 6EA0 722A

Refer to the supported platform documentation to see which platforms are supported in each release.

Update your sources lists

For Debian, you must add the Fluent Bit APT server entry to your sources lists. Add the following content at bottom of your /etc/apt/sources.list file.

deb [signed-by=/usr/share/keyrings/fluentbit-keyring.gpg] https://packages.fluentbit.io/debian/${CODENAME} ${CODENAME} main

Replace CODENAME with your specific Debian release name (for example: bookworm for Debian 12)

Update your repositories database

Update your system's apt database:

sudo apt-get update

Fluent Bit recommends upgrading your system (sudo apt-get upgrade). This could avoid potential issues with expired certificates.

Install Fluent Bit

1. Use the following apt-get command to install the latest Fluent Bit:

   sudo apt-get install fluent-bit

2. Instruct systemd to enable the service:

   sudo systemctl start fluent-bit

If you do a status check, you should see a similar output similar to:

sudo service fluent-bit status
● fluent-bit.service - Fluent Bit
   Loaded: loaded (/lib/systemd/system/fluent-bit.service; disabled; vendor preset: enabled)
   Active: active (running) since mié 2016-07-06 16:58:25 CST; 2h 45min ago
 Main PID: 6739 (fluent-bit)
    Tasks: 1
   Memory: 656.0K
      CPU: 1.393s
   CGroup: /system.slice/fluent-bit.service
           └─6739 /opt/fluent-bit/bin/fluent-bit -c /etc/fluent-bit/fluent-bit.conf
...

The default Fluent Bit configuration collect metrics of CPU usage and sends the records to the standard output. You can see the outgoing data in your /var/log/messages file.