Administration Section
Recently, TechCrunch announced the start of sales of 'grams' on July 10 at the Japanese exchange Liquid. Surprisingly, the world has fallen for the completely fictional story about a financial instrument from Telegram. Epigraph Major publications often publish rumors (information from verified sources), but you won't find another long-running saga like with TON, built entirely on leaks without any official information. Yes, it could have been […]
It seems I have given dozens of presentations for colleagues, clients, and public speaking throughout my IT career. For many years, PowerPoint has been my natural and reliable choice for creating slides. However, this year, the situation changed dramatically. From February to May, I had the opportunity to speak at five conferences, and I needed to prepare slides for my presentations […]
Hello! My name is Vadim Madison, and I lead the development of Avito's System Platform. We've discussed several times how our company is transitioning from a monolithic architecture to a microservices one. It's time to share how we transformed our infrastructure to maximize the benefits of microservices and ensure we don't get lost in them. How PaaS helps us here, as we […]
Note: In the Kubernetes community, a trend known as GitOps is gaining explicit popularity, as we personally confirmed by attending KubeCon Europe 2019. This term was relatively recently coined by Weaveworks CEO Alexis Richardson and refers to the use of familiar tools for developers (primarily Git, hence the name) to address operational tasks. In […]
When setting up and configuring a Git server, the question arises about organizing access for multiple users to several projects. I conducted research on this issue and found a solution that meets all my requirements: simple, secure, and reliable. My requirements are as follows: each user connects with their own account, multiple users can work on one project, and the same user can work on several […]
Many IT systems have a mandatory rule for periodically changing passwords. This is perhaps the most hated and most useless requirement of security systems. Some users, as a life hack, simply change the digit at the end. This practice has caused numerous inconveniences. However, people had to endure it for the sake of security. Now this advice is completely outdated. In May 2019, even Microsoft […]
The signal that helps airplanes find the runway can be faked using a radio for $600. The aircraft in the demonstration attacks the radio because of fake KGS signals, landing to the right of the runway. Almost any aircraft that has taken to the skies in the last 50 years—whether it’s a single-engine Cessna or a giant airliner with 600 seats—has relied on radio stations […]
Meetups for system administrators, Sysadminka, are held in Chelyabinsk, and at the last one, I presented our solution for running applications on 1C-Bitrix in Kubernetes. Bitrix, Kubernetes, and Ceph—an excellent mix? I’ll talk about how we put together a working solution from all of this. Let’s go! The meetup took place on April 18 in Chelyabinsk. You can read about our meetups on Timepad and view […]
MIT has developed an architecture for a new photonic processor. It will increase the efficiency of optical neural networks by a thousand times compared to similar devices. The chip will reduce the amount of electricity consumed by data centers. Here’s an overview of its structure. Photo — Ildefonso Polo — Unsplash Why a New Architecture is Needed Optical neural networks operate faster than traditional solutions that use electronic components. Light does not require isolation of signal […]
The Internet seems to be a strong, independent, and indestructible structure. In theory, the strength of the network is sufficient to withstand a nuclear explosion. In reality, the Internet can be brought down by a single small router. This is because the Internet is a jumble of contradictions, vulnerabilities, mistakes, and cat videos. The foundation of the Internet, the BGP protocol, is full of issues. It's surprising that it's still functioning. Beyond the flaws inherent in the Internet itself, it's also being broken by everyone […]
A tale was quickly told, but the work took a long time. More than a year and a half ago, I wanted to assemble my own NAS, and the starting point for building the NAS was organizing the server room. While sorting through cables, cases, and relocating a vintage 24-inch HP monitor to the dump, I discovered a cooler from Noctua. After considerable effort, […]
Hello, Habr! Today, I will talk about what my colleagues and I have been working on for several months: push notifications for mobile messengers. As I mentioned before, our application focuses mainly on security. Therefore, we investigated whether push notifications have any 'weak points,' and if so, how we can mitigate them to add this useful feature to […]