Jul 20, 2023

Client-side java script to render graphs w/o depending on graphite

Mini-graphite that uses client-side java script to render graphs w/o depending on graphite.

metronome implements the carbon protocol, so anything that can feed Graphite can feed metronome. We also accept submissions via POST.

FreeBSD’s ports collection holds a vast amount of software for various purposes. One such application in the net-mgmt category is the Metronome software. Metronome is a highly versatile network monitoring tool. In this article, we’ll delve into how to use Metronome on FreeBSD.

The Metronome software can be thought of as the heartbeat of your network, tracking data flow and ensuring every part of the system functions seamlessly. It measures network traffic with precision, which can be extremely beneficial when troubleshooting network issues or planning capacity.


If Metronome hasn’t been installed on your system, you can install it from the FreeBSD ports collection. Before we move into installation, make sure your ports tree is up-to-date.

portsnap fetch update

After updating, navigate to Metronome’s directory in your ports tree and install

cd /usr/ports/net-mgmt/metronome/
make install clean


Post-installation, you need to configure Metronome to suit your network’s specific needs. Edit the configuration file using any text editor you prefer

vi /usr/local/etc/metronome/metronome.conf

In the configuration file, define the network interfaces you wish to monitor. Lines starting with # represent comments and are not processed by the system.

# A simple Metronome configuration file.
interface "re0"
interface "em0"

In this example re0 and em0 represent the network interfaces.

Running Metronome

Once you finish configuring Metronome, you can start the service. Bear in mind FreeBSD does not automatically start the newly installed service. It is a two-step process. First, let’s add the Metronome service to your system’s start-up files.

echo 'metronome_enable="YES"' >> /etc/rc.conf

This command will append the line metronome_enable="YES" to the file /etc/rc.conf, hence enabling metronome service to start at the system boot. Start metronome manually by typing

service metronome start

Metronome is now up and running on your FreeBSD system.

Usage and Benefits

Metronome provides us with a deep insight into traffic patterns on the network. This invaluable information can help network administrators troubleshoot configuration issues, detect bandwidth hogs, and more.

Connect to the Metronome service with a utility like telnet to retrieve measurements

telnet localhost 8423

In the telnet session, you’d use commands like shiftrateinterface to get traffic patterns on your interfaces.

shiftrate interface re0 60

The above command will give you a summary of traffic on re0 interface for the last 60 seconds.

For a comprehensive view of your network security while traffic monitoring with Metronome, you can use network exploration tool and security/port scanner such as [Nmap]https//

FreeBSD ports collection comes with a vast reservoir of such useful software easing life for FreeBSD users.


Metronome is a valuable utility in any FreeBSD user’s toolbox, especially those responsible for network management. The insights provided by Metronome can streamline network management tasks and improve overall system performance.

In this article, we covered how to install Metronome from the FreeBSD ports collection, set it up, and take advantage of its features to keep network operations running smoothly. As always, be sure to consult the corresponding man page or other documentation you’re unsure about any part of the utility.

Once again, the FreeBSD ports collection demonstrates its convenience and usefulness by providing such a vast array of tools at your fingertips. Happy FreeBSD-ing!

Remember to explore [the FreeBSD ports collection]https// often, as it’s continuously updated with new software and port updates.

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