Comcast in Linux!

kungr · December 1, 2015, 1:56am

tylertreat/comcast/blob/master/README.md

#Comcast

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Testing distributed systems under hard failures like network partitions and instance termination is critical, but it's also important we test them under [less catastrophic conditions](http://www.bravenewgeek.com/sometimes-kill-9-isnt-enough/) because this is what they most often experience. Comcast is a tool designed to simulate common network problems like latency, bandwidth restrictions, and dropped/reordered/corrupted packets.

It works by wrapping up some system tools in a portable(ish) way. On BSD-derived systems such as OSX, we use tools like `ipfw` and `pfctl` to inject failure. On Linux, we use `iptables` and `tc`. Comcast is merely a thin wrapper around these controls. Windows support may be possible with `wipfw` or even the native network stack, but this has not yet been implemented in Comcast and may be at a later date.

## Installation

```
$ go get github.com/tylertreat/comcast
```

## Usage

On Linux, Comcast supports several options: device, latency, target/default bandwidth, packet loss, protocol, and port number.

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Hammerhead_Corvette · December 1, 2015, 2:03am

What is this for really?!

kungr · December 1, 2015, 4:28am

a joke, did you read the page.

freqlabs · December 1, 2015, 6:20am

Comcast is a real program, the name is a joke, because it simulates crappy network.

freqlabs · December 1, 2015, 6:22am

The real Comcast also has a pretty good assortment of projects on Github.

Goalkeeper · December 1, 2015, 4:10pm

I had no idea that Comcast has a github.