Redhat / CentOS
Fluent Bit is distributed as fluent-bit package and is available for the latest stable CentOS system.
The following architectures are supported
- aarch64 / arm64v8
For CentOS 9+ we use CentOS Stream as the canonical base system.
A simple installation script is provided to be used for most Linux targets. This will always install the most recent version released.
curl https://raw.githubusercontent.com/fluent/fluent-bit/master/install.sh | sh
This is purely a convenience helper and should always be validated prior to use. The recommended secure deployment approach is to follow the instructions below.
CentOS 8 is now EOL so the default Yum repositories are unavailable.
Make sure to configure to use an appropriate mirror, for example:
$ sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-* && \
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
An alternative is to use Rocky or Alma Linux which should be equivalent.
We provide fluent-bit through a Yum repository. In order to add the repository reference to your system, please add a new file called fluent-bit.repo in /etc/yum.repos.d/ with the following content:
name = Fluent Bit
baseurl = https://packages.fluentbit.io/centos/$releasever/
It is best practice to always enable the gpgcheck and repo_gpgcheck for security reasons. We sign our repository metadata as well as all of our packages.
From the 1.9.0 and 1.8.15 releases please note that the GPG key has been updated at https://packages.fluentbit.io/fluentbit.key so 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) <[email protected]>
The previous key is still available at https://packages.fluentbit.io/fluentbit-legacy.key and may 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
Once your repository is configured, run the following command to install it:
sudo yum install fluent-bit
Now the following step is to 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)
└─3820 /opt/fluent-bit/bin/fluent-bit -c etc/fluent-bit/fluent-bit.conf
The default configuration of fluent-bit is collecting metrics of CPU usage and sending the records to the standard output, you can see the outgoing data in your /var/log/messages file.
The fluent-bit.repo file for the latest installations of Fluent-Bit uses a $releasever variable to determine the correct version of the package to install to your system:
name = Fluent Bit
baseurl = https://packages.fluentbit.io/centos/$releasever/$basearch/
Depending on your Red Hat distribution version, this variable may return a value other than the OS major release version (e.g., RHEL7 Server distributions return "7Server" instead of just "7"). The Fluent-Bit package url uses just the major OS release version, so any other value here will cause a 404.
In order to resolve this issue, you can replace the $releasever variable with your system's OS major release version. For example:
name = Fluent Bit
baseurl = https://packages.fluentbit.io/centos/7/$basearch/