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Fluency Collector

The Fluency Collector is a virtual device (VM) that acts as a local collection server. It collects events from various log sources (such as Syslog) and continuously forwards (compresses and uploads) these events to the connected Fluency Cloud instance, via a secure HTTPs connection.

The collector provides an additional method of data ingestion, for data sources that lacks a mean of sending data securely to cloud-basexd endpoints, or if there are concerns with upload bandwidth or latency.

Additionally, the collector can also facilitate support for LDAP and NetFlow integrations, if installed on-prem.


The Fluency Collector is installed on top of Enterprise Linux operating systems (RHEL variants). Prior to Enterprise Linux 8 (EL8), CentOS was the operating system of choice. Currently, for EL9, Fluency supports Rocky Linux 9 and also AlmaLinux 9.

For more detailed information regarding Rocky Linux, refer to the official vendor documentation:

Install Rocky Linux OS

This section assumes that the Rocky Linux OS installation takes place on a virtual machine with a new, empty disk, and that the system has been booted from the Minimal install ISO.

NOTE: If your virtual machine already has Rocky Linux pre-installed, such as the case when launching an instance from an AWS, GCP, or MS Azure image, this section may be skipped; follow the instructions in the next Running the Fluency installation package section

The Rocky Linux 9 Minimal install ISO can be found at the following direct link(s):

(Other official Mirrors/Repositories may be used to download the same ISO.)

The recommended size for the Fluency Collector is 2 vCPU, 8GB RAM and 80GB to 1TB of disk space.

For detailed instructions on Rocky Linux installation, please refer to the official documentation:

Booting from ISO image

Start/boot the machine from the installation disk/image. Select the Install Rocky Linux 9 option from the launch menu.


On the following screen(s), select the installation language.

Select Continue to proceed to the Installation Summary page.


Under the LOCALIZATION section, select Time & Date to modify the timezone of the Fluency Collector.

Choose Etc as the Region. Select Greenwich Mean Time as the City.

NOTE: It is strongly suggested to set the Fluency Collector timezone as shown above. Fluency Cloud instances uses the UTC timezone, and having both systems on the same timezone settings will simplify data ingress. However, if this not possible, Fluency does provide standard time adjustment scripts for use.

Disk Partitioning

Return to the Installation Summary page, and navigate to the SYSTEM section.

Select Installation Destination to configure disk partitioning.

Manual Disk Partitioning

NOTE: (Skip this section if using Automatic partitioning.)

Choose the Custom option, for Storage Configuration to proceed.

Select Standard Partition and create a mount point (via the "+" button) for the root directory “/”.

For the Desired Capacity, choose the entire available space.

NOTE: (Advanced Option) For larger Collector deployments, it is also advisible to create a smaller root "/", partition, and allocate the remaining free space to a separate, and larger, "/data" partition. Please reserve a minimum of 10GB for the root partition in this scenario.

Click Done when finished configuring. The File System can use the default xfs setting.

Accept/confirm the changes and acknowledge the warnings to continue.

Network Settings

Return to the Installation Summary page, and navigate to the SYSTEM section.

Select Network & Host Name to configure the network settings.

For the Host Name, choose a valid name for the machine, avoiding spaces.

Toggle the On/Off switch for the Network interface to enable the port on boot.

Advanced options can be found under Configure. Please refer to the OS vendor's documentation for additional instructions.

Click Done when finished.

Additional System Settings

Return to the Installation Summary page, and navigate to the SYSTEM section.

Select KDUMP to configure the KDUMP settings.

It is suggested to disable this feature.

Default User Settings

Return to the Installation Summary page, and navigate to the USER SETTINGS section.

Select Root passwor to configure the default root user password.

Select a password for the root user. It is suggested to also Allow root SSH login with password to facilitate initial access and installation.

Begin Installation

Return to the Installation Summary page, and select Begin Installation to start.

Wait for the progress bar to indicate that the installation is complete.

Select Reboot System to complete the installation. You will be prompted to log into the system terminal when the machine completes the reboot.

Running the Fluency installation package

Login to the system with the root user credentials created in the above step. If the Rocky Linux installation is from a major cloud service provider, use the vendor provided credentials to log in.

(If not using a root account, add the prefix “sudo” for each of the commands shown below.)

Download Install package

Download the Fluency installation package (and make it executable) via the following commands:

yum -y install wget
chmod 755 Fluency-installer-v905.package

Execute Install package

Run the installation package with the following command:


Follow the on-screen interactive prompts.

Kernel Update/Reboot

You will be asked to update kernel and restart during the installation process.

Configuration/Install Package

Once the VM restarts, log back in and run the installation package again.


Follow the on-screen interactive prompts to continue with the installation.

The console prompt should display DONE when installation is completed.

Fluency Portal Configurations

Navigate to the Collectors page on the Fluency portal.

Click the "+ COLLECTOR" button to Add a new Collector.

Connecting the Collector to a Fluency Cloud Instance

Obtain a collector token from your Fluency portal.

This token must be added to the Collector.

On the Fluency collector, a command is provided:

mgmt add_server https://<companyname> <your-token>


mgmt add_server https://<companyname> <your-token>

NOTE: If the Fluency collector has previously been configured for another Fluency Cloud instance, running the above command will overwrite those settings.

Connection Complete

This completes the process to install and configure a Fluency collector.

Refresh the Collectors page on the Fluency portal. The status indicator for the new collector should now be “Green”.

Additional Settings

Additional settings, such as Syslog port configurations, Http Event Collector and Rabbit MQ settings can be found in the relavent sub-sections of this document.

Page last updated: 2024 Jun 09