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Version: 7.4

hsflowd

hsflowd is an open-source host sFlow agent designed to monitor servers, virtual machines, and containers. It provides resource usage statistics, performance metrics, and network traffic data by leveraging the sFlow standard. Here's how to configure hsflowd:

Install hsflowd​

First, you need to install the hsflowd package. The installation process varies depending on your operating system. For example, on a Debian-based system like Ubuntu, you can use the following commands:

sudo apt-get update
sudo apt-get install hsflowd

For other systems, you may need to download and compile the source code from the official GitHub repository: https://github.com/sflow/host-sflow

Edit hsflowd configuration file​

After installation, locate the hsflowd configuration file, typically found at /etc/hsflowd.conf. Open the file with a text editor of your choice, such as nano or vi.

sudo nano /etc/hsflowd.conf

Configure sFlow settings​

In the configuration file, you'll find several settings that need to be configured, such as the collector's IP address, port, sampling rate, and polling intervals. The configuration file uses an XML-like syntax. Here's an example of a basic configuration:

<sFlow>
  <sFlowSettings>
    <sampling>400</sampling>
    <polling>20</polling>
    <header>128</header>
    <datagram>1400</datagram>
    <agent>AGENT_IP_ADDRESS</agent>
  </sFlowSettings>
  <collectors>
    <collector>
      <ip>x.x.x.x</ip>
      <udpport>6343</udpport>
    </collector>
  </collectors>
</sFlow>

Replace AGENT_IP_ADDRESS with the IP address of the sFlow agent (typically the host's IP address) and x.x.x.x with the IP address of your ElastiFlow NetObserv Flow. You can adjust the sampling, polling, header, and datagram values as needed.

Save and exit​

After configuring the sFlow settings, save and exit the configuration file.

Restart hsflowd​

To apply the changes, restart the hsflowd service. The command varies depending on your operating system. For a Debian-based system like Ubuntu, use the following command:

sudo systemctl restart hsflowd

Verify the configuration​

To verify that hsflowd is running and exporting sFlow data, use the following command:

sudo systemctl status hsflowd

This command should display the status of the hsflowd service, indicating it's running and active.

Once you've completed these steps, your server will start exporting sFlow data to the specified flow collector. Make sure your ElastiFlow NetObserv Flow is set up to receive and process the exported data for analysis and monitoring purposes.