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The latest blog posts to take off on Hacker News. 1,839 posts.
Infrastructure & DevOps
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Kubernetes: Make your services faster by removing CPU limits
At Buffer, we’ve been using Kubernetes since 2016. We’ve been managing our k8s (kubernetes) cluster with kops, it has about 60 nodes (on AWS), and runs about 1500 containers. Our transition to a micro-service architecture has been full of trial and errors. Even after a few years running k8s, we are still learning its…
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Multi-Tenant Architectures
Multi-tenancy Application Deployment Architecture could be modeled in 4 broad ways: Separate Apps & Separate Databases Shared ...
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A log/event processing pipeline you can't have (2019)
Let me tell you about the still-not-defunct real-time log processing pipeline we built at my now-defunct last job. It handled logs from a la...
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Turning the Raspberry Pi 4 into a Mini Server
Since the Raspberry Pi 4 came out last year, we now have an excellent candidate to base the mini server on. The faster processor and option for up to 8GB of RAM opens up more possibilities for what you can do with it, including now being more than capable as a general Linux desktop system, so with all that in mind…
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Pilo: Raspberry Pi-Powered Lights-Out Remote Server Management
The completed Pilo controller, before final installation. The USB capture card and Arduino Nano USB serial are soldered to the underside of the 3B+.
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How to contact Google SRE by dropping a shell in Cloud SQL
Note: The vulnerabilities that are discussed in this post were patched quickly and properly by Google. We support responsible disclosure. The research that resulted in this post was done by me and …
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A deep dive into the official Docker image for Python
The “official” Python Docker image is useful, but to actually understand why, and to use it correctly, it’s worth understanding how exactly it’s constructed.
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Making sure you're not a bot!
You are seeing this because the administrator of this website has set up Anubis to protect the server against the scourge of AI companies aggressively scraping websites . This can and does cause downtime for the websites, which makes their resources inaccessible for everyone.
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Why is there only one Snap Store?
Snap and Flatpak are the basis of two universal app stores for Linux: the Snap Store and Flathub. Interestingly, Flatpak has multiple repositories: Flathub is the main one but both Fedora and Elementary OS also host their own store. In contrast; there is only one Snap store. Why is that?
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Cloud Traffic
I recently watched Build an enterprise-grade service mesh with Traffic Director , featuring Stewart Reichling and Kelsey Hightower of GCP, and of course Google Cloud’s Traffic Director . Coming at this with a brain steeped in 5½ years of AWS technology and culture was surprising in ways that seem worth sharing.
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That UPS you bought for your home server may not be as useful as you think
Some years ago I decided to install a server at home for use as a NAS (network-attached storage) in my home network, and for an Internet-facing server. I live in a place where blackouts are very in…
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Trying to build the ultimate Raspberry Pi computer – Zero Terminal V3
Here's another iteration on the Zero Terminal projects I've been working on for a few years. For those of you who haven't seen them, I've been trying to design the most usable all in one Pi Zero computer out there.
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TikTok: Logs, Logs, Logs
We are in 2020 and the US president is about to ban TikTok, a video-sharing social network mobile app, because “it poses a risk to US…
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Low latency tuning guide
This guide describes how to tune your AMD64/x86_64 hardware and Linux system for running real-time or low latency workloads.
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Small mail server best current practices
(This post was originally written as a reply on the mailop mailing-list, but a friend asked me to turn it into a blog post. I’ve edited it, mostly adding more links to elsewhere, but there are some additions here.)
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A Surprise AWS Bill
The tale of the July 4th surprise $2700 AWS bill. It is more nuanced than you think and might have exposed a bug.
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I made a simple geolocation service
Learn how to create simple Geolocation service without 3rd-party APIs
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Good Logging
To check if a program is doing what it should, you can inspect the output from a given input. But as the system grows, you also need logging to help you understand what is happening. Good log messa…
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Monitoring your own infrastructure using Grafana, InfluxDB, and CollectD
Have you ever wondered which node consumes more resources? Managing a bespoke dashboard for your infrastructure. Learn how to create it.
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Hosting your entire web application using S3 and CloudFront
Leverage S3 and CloudFront to host your web app in an infinitely scalable way.
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This Blog Is Now Running on Solar Power
I've put a solar panel on my balcony, which is connected to a solar charge controller. This device charges an old worn-out car battery and provides power to a Raspberry Pi ~~3b+~~ 4B, which in turn powers this (static) website.
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Scaling Linux Services: Before accepting connections
Theo Julienne is a software & infrastructure engineer.
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