.. contents:: tcconfig :backlinks: top :depth: 2

Summary

tcconfig <https://github.com/thombashi/tcconfig>__ is a tc command wrapper. Make it easy to set up traffic control of network bandwidth/latency/packet-loss/packet-corruption/etc. to a network-interface/Docker-container(veth).

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Traffic control

Setup traffic shaping rules ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Easy to apply traffic shaping rules to specific network:

• Outgoing/Incoming packets
• Source/Destination IP-address/network (IPv4/IPv6)
• Source/Destination ports

Available parameters ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The following parameters can be set to network interfaces:

• Network bandwidth rate [G/M/K bps]
• Network latency [microseconds/milliseconds/seconds/minutes]
• Packet loss rate [%]
• Packet corruption rate [%]
• Packet duplicate rate [%]
• Packet reordering rate [%]

Targets ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

• Network interfaces: e.g. eth0
• Docker container (veth corresponding with a container)

.. image:: docs/gif/tcset_example.gif

Usage

Set traffic control (tcset command)

tcset is a command to add traffic control rule to a network interface (device).

e.g. Set a limit on bandwidth up to 100Kbps ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: console

# tcset eth0 --rate 100Kbps

e.g. Set network latency ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ You can use time units (such as us/sec/min/etc.) to designate delay time.

Set 100 milliseconds network latency ''''''''''''''''''''''''''''''''''''''''''''''''''' .. code-block:: console

# tcset eth0 --delay 100ms

Set 10 seconds network latency ''''''''''''''''''''''''''''''''''''''''''''''''''' .. code-block:: console

# tcset eth0 --delay 10sec

Set 0.5 minutes (30 seconds) network latency ''''''''''''''''''''''''''''''''''''''''''''''''''' .. code-block:: console

# tcset eth0 --delay 0.5min

You can also use the following time units:

.. table::

+------------+----------------------------------------------------------+
|    Unit    |                Available specifiers (str)                |
+============+==========================================================+
|hours       |``h``/``hour``/``hours``                                  |
+------------+----------------------------------------------------------+
|minutes     |``m``/``min``/``mins``/``minute``/``minutes``             |
+------------+----------------------------------------------------------+
|seconds     |``s``/``sec``/``secs``/``second``/``seconds``             |
+------------+----------------------------------------------------------+
|milliseconds|``ms``/``msec``/``msecs``/``millisecond``/``milliseconds``|
+------------+----------------------------------------------------------+
|microseconds|``us``/``usec``/``usecs``/``microsecond``/``microseconds``|
+------------+----------------------------------------------------------+

e.g. Set 0.1% packet loss ^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: console

# tcset eth0 --loss 0.1%

e.g. All of the above settings at once ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: console

# tcset eth0 --rate 100Kbps --delay 100ms --loss 0.1%

e.g. Specify the IP address of traffic control ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: console

# tcset eth0 --delay 100ms --network 192.168.0.10

e.g. Specify the IP network and port of traffic control ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: console

# tcset eth0 --delay 100ms --network 192.168.0.0/24 --port 80

Set traffic control to a docker container ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Execute tcconfig with --docker option on a Docker host:

.. code-block:: console

# tcset <container name or ID> --docker ...

You could use --src-container/--dst-container options to specify source/destination container.

Set traffic control within a docker container ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ You need to run a container with --cap-add NET_ADMIN option if you you would like to set a tc rule within a container:

.. code-block:: console

docker run -d --cap-add NET_ADMIN -t <docker image>

A container image that builtin tcconfig can be available at https://hub.docker.com/r/thombashi/tcconfig/

Delete traffic control (tcdel command)

tcdel is a command to delete traffic shaping rules from a network interface (device).

e.g. Delete traffic control of eth0 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ You can delete all of the shaping rules for the eth0 with -a/--all option:

.. code-block:: console

# tcdel eth0 --all

Display traffic control configurations (tcshow command)

tcshow is a command to display the current traffic control settings for network interface(s).

Example ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. code-block:: console

# tcset eth0 --delay 10ms --delay-distro 2  --loss 0.01% --rate 0.25Mbps --network 192.168.0.10 --port 8080
# tcset eth0 --delay 1ms --loss 0.02% --rate 500Kbps --direction incoming
# tcshow eth0
{
    "eth0": {
        "outgoing": {
            "dst-network=192.168.0.10/32, dst-port=8080, protocol=ip": {
                "filter_id": "800::800",
                "delay": "10.0ms",
                "delay-distro": "2.0ms",
                "loss": "0.01%",
                "rate": "250Kbps"
            }
        },
        "incoming": {
            "protocol=ip": {
                "filter_id": "800::800",
                "delay": "1.0ms",
                "loss": "0.02%",
                "rate": "500Kbps"
            }
        }
    }
}

For more information

More examples are available at https://tcconfig.rtfd.io/en/latest/pages/usage/index.html

Installation

Installation: pip

tcconfig can be installed from PyPI <https://pypi.python.org/pypi>__ via pip <https://pip.pypa.io/en/stable/installing/>__ (Python package manager) command.

.. code:: console

sudo pip install tcconfig

Installation: dpkg (Debian/Ubuntu)

.. code:: console

curl -sSL https://raw.githubusercontent.com/thombashi/tcconfig/master/scripts/installer.sh | sudo bash

Dependencies

• Python 3.5+
• Python package dependencies (automatically installed) <https://github.com/thombashi/tcconfig/network/dependencies>__

Linux packages

• mandatory: required for tc command:
  • Ubuntu/Debian: iproute2
  • Fedora/RHEL: iproute-tc
• optional: required to when you use --iptables option:
  • iptables

Linux kernel module

• sch_netem

Optional Python packages

• Pygments <http://pygments.org/>__

Documentation

https://tcconfig.rtfd.io/

Troubleshooting

https://tcconfig.rtfd.io/en/latest/pages/troubleshooting.html

Docker image

https://hub.docker.com/r/thombashi/tcconfig/

Sponsors

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Become a sponsor <https://github.com/sponsors/thombashi>__