Iperf3 Server

iPerf3 is a tool for active measurements of the maximum achievable bandwidth on IP networks

Client bandwith test: iperf3 -c $public_iperf_server
Example:

TCP: iperf3 -c proof.ovh.net
UDP: iperf3 -c ping.online.net -u -b 0

Package to install: iperf3

To turn your server into iperf3 server
you can run many iperf3 proceeses as Systemd services.

Please follow the steps here: https://iperf.fr/iperf-servers.php

You can add StartLimitIntervalSec=0 in service description after Restart=always
to avoid the blocking of service restart by the system if it reachs a StartLimit

Metrics

Get iperf3 tests stats from /var/log/syslog with telegraf to create Grafana Dashboard

Minimal telegraf.conf

    [[inputs.tail]]
      files = ["/var/log/nginx/access.log"]
      from_beginning = false
      grok_patterns = ["%{COMBINED_LOG_FORMAT}"]
      name_override = "nginx_access_log"
      grok_custom_pattern_files = []
      data_format = "grok"

    [[inputs.tail]]
      files = ["/var/log/syslog"]
      from_beginning = false
      #grok_patterns = ["%{SYSLOGBASE}"]
      #grok_patterns = ["%{SYSLOGBASE} Accepted connection from %{IPV4:clienti_ip:tag}, port %{NUMBER:port}"]
      grok_patterns = ["local %{IPV4:iperf_ip:tag} port %{NUMBER:iperf_port} connected to %{IPV4:client_ip:tag} port %{NUMBER:client_port:tag}"]
      name_override = "iperf3"
      grok_custom_pattern_files = []
      data_format = "grok"

GROK HELP:

https://www.elastic.co/guide/en/logstash/current/plugins-filters-grok.html
https://grokdebug.herokuapp.com/

Install telegraf

Installation

    wget -qO- https://repos.influxdata.com/influxdb.key | sudo apt-key add -
    echo "deb https://repos.influxdata.com/debian buster stable" | sudo tee /etc/apt/sources.list.d/influxdb.list
    apt-get update && sudo apt-get install telegraf