Rocky Linux and Alma Linux

Fluent Bit is distributed as the fluent-bit package and is available for the latest versions of Rocky or Alma Linux now that CentOS Stream is tracking more recent dependencies.

Fluent Bit supports the following architectures:

• 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. Older versions of this install script won't support auto-detecting Rocky or Alma Linux. The recommended secure deployment approach is to use the following instructions:

RHEL 9

From CentOS 9 Stream and later, the CentOS dependencies will update more often than downstream usage. This might mean that incompatible (more recent) versions are provided of certain dependencies (for example, OpenSSL). For OSS, there are RockyLinux and AlmaLinux repositories. This might be required for RHEL 9 as well which will no longer track equivalent CentOS 9 stream dependencies. No RHEL 9 build is provided, it is expected to use one of the OSS variants listed.

Configure YUM

The fluent-bit package is provided through a Yum repository. To add the repository reference to your system:

1. In /etc/yum.repos.d/, add a new file called fluent-bit.repo.

2. Add the following content to the file - replace almalinux with rockylinux if required:

   [fluent-bit]
     name = Fluent Bit
     baseurl = https://packages.fluentbit.io/almalinux/$releasever/
     gpgcheck=1
     gpgkey=https://packages.fluentbit.io/fluentbit.key
     repo_gpgcheck=1
     enabled=1

3. As a best practice, enable gpgcheck and repo_gpgcheck for security reasons. Fluent Bit signs its repository metadata and all Fluent Bit packages.

Install

1. After your repository is configured, run the following command to install it:

   sudo yum 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 like this:

$ systemctl status fluent-bit

● fluent-bit.service - Fluent Bit
   Loaded: loaded (/usr/lib/systemd/system/fluent-bit.service; disabled; vendor preset: disabled)
   Active: active (running) since Thu 2016-07-07 02:08:01 BST; 9s ago
 Main PID: 3820 (fluent-bit)
   CGroup: /system.slice/fluent-bit.service
           └─3820 /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.