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).
Project description
Summary
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).
Traffic control
Setup traffic shaping rules
Easy to apply traffic shaping rules to specific networks:
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 [%]
Packet limit count [COUNT]
Targets
Network interfaces: e.g. eth0
Docker container (veth corresponding with a container)
Usage
Set traffic control (tcset command)
tcset is a command to add a traffic control rule to a network interface (device).
e.g. Set a limit on bandwidth up to 100Kbps
# tcset eth0 --rate 100Kbpse.g. Set network latency
You can use time units (such as us/sec/min/etc.) to designate delay time.
Set 100 milliseconds of network latency
# tcset eth0 --delay 100msSet 10 seconds of network latency
# tcset eth0 --delay 10secSet 0.5 minutes (30 seconds) network latency
# tcset eth0 --delay 0.5minYou can also use the following time units:
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
# tcset eth0 --loss 0.1%e.g. All of the above settings at once
# tcset eth0 --rate 100Kbps --delay 100ms --loss 0.1%e.g. Specify the IP address of the traffic control
# tcset eth0 --delay 100ms --network 192.168.0.10e.g. Specify the IP network and port of traffic control
# tcset eth0 --delay 100ms --network 192.168.0.0/24 --port 80Set traffic control to a docker container
Execute tcconfig with --docker option on a Docker host:
# tcset <container name or ID> --docker ...You could use --src-container/--dst-container options to specify the source/destination container.
Set traffic control within a docker container
You need to run a container with --cap-add NET_ADMIN option if you would like to set a tc rule within a container:
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:
# tcdel eth0 --allDisplay traffic control configurations (tcshow command)
tcshow is a command to display the current traffic control settings for network interface(s).
Example
# 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 via pip (Python package manager) command.
sudo pip install tcconfigInstallation: dpkg (Debian/Ubuntu)
curl -sSL https://raw.githubusercontent.com/thombashi/tcconfig/master/scripts/installer.sh | sudo bashDependencies
Linux packages
- mandatory: required for tc command:
Ubuntu/Debian: iproute2
Fedora/RHEL: iproute-tc
- optional: required when you use the --iptables option:
iptables
Linux kernel module
sch_netem
Optional Python packages
Documentation
Troubleshooting
https://tcconfig.rtfd.io/en/latest/pages/troubleshooting.html
Docker image
Sponsors
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