https://github.com/lizrice/ebpf-networking

The Beginner's Guide to eBPF Programming for Networking
https://github.com/lizrice/ebpf-networking

Last synced: 22 days ago
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The Beginner's Guide to eBPF Programming for Networking

• Host: GitHub
• URL: https://github.com/lizrice/ebpf-networking
• Owner: lizrice
• License: apache-2.0
• Created: 2021-10-11T11:03:33.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2021-10-12T08:57:41.000Z (about 3 years ago)
• Last Synced: 2024-02-17T06:36:12.266Z (9 months ago)
• Language: C
• Size: 10.7 KB
• Stars: 99
• Watchers: 4
• Forks: 3
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# The Beginner's Guide to eBPF Programming for Networking

As seen at Cloud Native eBPF Day 2021. 

## Setup

Create a container that we can issue curl requests to. 

```

docker run -d --rm --name backend-A -h backend-A --env TERM=xterm-color nginxdemos/hello:plain-text

# Get the IP address of this target 

docker exec -it backend-A ip a 

```

Create a privileged container from which we can run eBPF programs. We will attach most of our programs to its `eth0` virtual

interface. 

```

docker run --rm -it -v /usr:/usr -v /home:/home -v /sys:/sys --privileged --env TERM=xterm-color -h container ubuntu

```

Assuming you cloned this repo into your home directory, the mount of `/home`

means you can `cd /home//ebpf-networking` within this container to

find this example code.

In a separate terminal window, observe the debug trace output: 

```bash

sudo cat /sys/kernel/debug/tracing/trace_pipe

```

## Prerequisites

These examples use [BCC](https://github.com/iovisor/bcc)

## Examples

See the

[slides](https://speakerdeck.com/lizrice/beginners-guide-to-ebpf-programming-for-networking)

and video (coming soon) for more info on the different examples included here,

and how to use them. 

Examples include 

* Kprobe on tcp_v4_connect() kernel function

* Attaching a socket filter to a raw socket 

* XDP 

* Traffic control - adding a filter on ingress 

## More examples

This is part of a series of eBPF example code that are indexed at [lizrice/ebpf-beginners](https://github.com/lizrice/ebpf-beginners)