linux-kernel-netfilter
pwru
| linux-kernel-netfilter | pwru | |
|---|---|---|
| 1 | 7 | |
| 3 | 2,510 | |
| - | 4.9% | |
| 4.0 | 9.1 | |
| 7 months ago | about 14 hours ago | |
| C | C | |
| MIT License | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
linux-kernel-netfilter
pwru
- GitHub - cilium/pwru: Packet, where are you? -- eBPF-based Linux kernel networking debugger
- cilium/pwru: Packet, where are you? -- eBPF-based Linux kernel networking debugger
-
Packet, where are you? – eBPF-based Linux kernel networking debugger
if you have a recent enough kernel, this change https://github.com/cilium/pwru/pull/148 means that it will print the reason the packet was dropped in the output - see https://lwn.net/Articles/885729/
There's a whole heap of reasons a packet can be dropped:
-
A list of new(ish) command line tools – Julia Evans
[pwru](https://github.com/cilium/pwru) is a fun new tool from the Cilium folks for tracing network packets in the kernel. Like tcpdump but it shows you the full path including kernel syscalls. Lets you debug much deeper than "when the packet gets to this port it gets dropped".
-
Better visibility into Linux packet-dropping decisions
I recently came across another useful utility for debugging unexpected packet drops - PWRU[0] (Packet, Where Are You) by Cilium.
It uses eBPF to try to trace the path of the packet through the kernel. Haven't needed to use it yet, but it could have saved me a lot of trouble in the past.
[0]: https://github.com/cilium/pwru
What are some alternatives?
parca-agent - eBPF based always-on profiler auto-discovering targets in Kubernetes and systemd, zero code changes or restarts needed!
fsmon - monitor filesystem on iOS / OS X / Android / FirefoxOS / Linux
libbpf - Automated upstream mirror for libbpf stand-alone build.
bpfcov - Source-code based coverage for eBPF programs actually running in the Linux kernel
glow - Render markdown on the CLI, with pizzazz! 💅🏻
up - Ultimate Plumber is a tool for writing Linux pipes with instant live preview
lnav - Log file navigator
lf - Terminal file manager
navi - An interactive cheatsheet tool for the command-line
tig - Text-mode interface for git
Hoppscotch - Open source API development ecosystem.
tubular - BSD socket API on steroids