pwru
dive
| pwru | dive | |
|---|---|---|
| 7 | 91 | |
| 2,464 | 43,606 | |
| 4.2% | - | |
| 9.1 | 6.6 | |
| 7 days ago | 14 days ago | |
| C | Go | |
| Apache License 2.0 | MIT License |
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.
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
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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:
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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".
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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
dive
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Show HN: Docker-phobia: Analyze Docker image size with a treemap
Cool, gonna try this soon. Would be great to use in combination with Dive (https://github.com/wagoodman/dive)
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Mastering Docker Image Optimization: 6 Key Strategies for building Lighter, Faster, and Safer images
Dive is an open-source tool that allows you to explore the various layers of a Docker image. It shows you the content of each layer and helps you identify voluminous or unnecessary parts.
- Optimisation des images Docker: 6 Stratégies clés pour des images plus légeres et plus performantes
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I reduced the size of my Docker image by 40% – Dockerizing shell scripts
Dive is a great tool for debugging this. I like image reduction work just because it gives me a chance to play with Dive: https://github.com/wagoodman/dive
One easy low hanging fruit I see a LOT for ballooning image sizes is people including the kitchen sink SDK/CLI for their cloud provider (like AWS or GCP), when they really only need 1/100 of that. The full versions of both of these tools are several hundred mb each
- Dive: A tool for exploring a Docker image, layer contents and more
- Dive – A tool for exploring each layer in a Docker image
- FLaNK Stack Weekly for 12 September 2023
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Dive Into Docker part 4: Inspecting Docker Image
This post is going to be shorter. I'd like to highlight a tool that I really enjoy working with called "Dive" It is an essential tool when working to build and optimize docker containers.
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Top 10 CLI Tools for DevOps Teams
Whether you work with Docker regularly or even create your own Docker containers, Dive is a great tool for streamlining image sizes, potentially helping you save storage costs and speed up deployments.
- Dive – exploring a Docker image, layer contents, and shrinking a image size
What are some alternatives?
parca-agent - eBPF based always-on profiler auto-discovering targets in Kubernetes and systemd, zero code changes or restarts needed!
skopeo - Work with remote images registries - retrieving information, images, signing content
fsmon - monitor filesystem on iOS / OS X / Android / FirefoxOS / Linux
Lean and Mean Docker containers - Slim(toolkit): Don't change anything in your container image and minify it by up to 30x (and for compiled languages even more) making it secure too! (free and open source)
libbpf - Automated upstream mirror for libbpf stand-alone build.
buildkit - concurrent, cache-efficient, and Dockerfile-agnostic builder toolkit
bpfcov - Source-code based coverage for eBPF programs actually running in the Linux kernel
lnav - Log file navigator
glow - Render markdown on the CLI, with pizzazz! 💅🏻
Whaler - Program to reverse Docker images into Dockerfiles
up - Ultimate Plumber is a tool for writing Linux pipes with instant live preview
distroless - 🥑 Language focused docker images, minus the operating system.