What is Istio? It is a so-called Service mesh, a technology that adds a layer of abstraction over the network. We intercept all or part of the traffic in the cluster and perform a specific set of operations on it. Which ones exactly? For example, we implement smart routing, apply a circuit breaker approach, organize 'canary deployment' by partially switching traffic to a new version of the service, and can limit […]
In the previous article, we examined the basic components of the Istio Service Mesh, got acquainted with the system, and answered the main questions that usually arise at the beginning of working with Istio. In this part, we will look at how to organize the collection of tracing information across the network. The first thing that comes to mind for many developers and system administrators when they hear the words Service […]
Microsoft has changed the storage device requirements for installing the operating system. Now, in Windows 10, starting with version 1903 (this update is expected in May 2019), the minimal free disk space required for the operating system to function is at least 32 GB for both 32-bit and 64-bit versions. Thus, the 'Reserved storage' of 7 GB from […]
The Association of Internet Trade Companies (AKIT) proposed a new initiative that involves changes to the existing customs duties on expensive parcels from abroad. It is suggested to replace the disparate tax contributions with a single fee of 15%. According to 'Kommersant', this is a softer option, as initially the discussion was about 20%. The proposal is currently under consideration at the Analytical Center under the government, the Gaidar Institute, and 'Post […]
The release of the Linux distribution Fedora 30 has been announced. Products prepared for download include Fedora Workstation, Fedora Server, Fedora Silverblue, Fedora IoT Edition, as well as a set of 'spins' with Live builds for desktop environments KDE Plasma 5, Xfce, MATE, Cinnamon, LXDE, and LXQt. The builds are formed for architectures x86, x86_64, Power64, ARM64 (AArch64), and various devices with 32-bit ARM processors. The most notable improvements in Fedora […]
A new future, the picture of which we described in the previous article about connecting humans to the Internet, is expected to await humanity in the next 20 years, according to several researchers. What is the overall direction of human development? Significant financial flows are being invested in improving the quality of life. The main sources of decline in overall quality of life are various diseases and mortality. Work on […]
The release of the TeX Live 2019 distribution, created in 1996 on the basis of the teTeX project, is ready. TeX Live is the easiest way to deploy infrastructure for preparing scientific documentation, regardless of the operating system used. A DVD bundle (2.8 GB) of TeX Live 2019 has been prepared for download, which contains a working Live environment, a complete set of installation files for various operating systems, a copy of the CTAN repository […]
Translation of the article: Envoy threading model — https://blog.envoyproxy.io/envoy-threading-model-a8d44b922310 I found this article quite interesting, and since Envoy is most commonly used as part of 'istio' or simply as an 'ingress controller' for Kubernetes, most people do not have the same direct interaction with it as they do with typical installations of Nginx or Haproxy. However, if something breaks, it would be good […]
Or a bit of applied tetrisology. All that's new is well-forgotten old. Epigraphs. Problem statement It is necessary to periodically download the current PostgreSQL log file from AWS cloud to a local Linux host. Not in real-time, but let's say with a slight delay. The period for updating the log file is 5 minutes. The log file in AWS is rotated every hour. Tools used To download the log file to the host […]
Introduction to Operating Systems Hello, Habr! I would like to present to your attention a series of translated articles on literature that I find interesting — OSTEP. This material explores in depth the workings of Unix-like operating systems, specifically focusing on processes, various schedulers, memory, and other similar components that make up a modern OS. You can view the original materials here. […]
Recently, Google introduced a "picture-in-picture" mode for Chrome users. This feature is currently available for both PCs and mobile devices, but it only supports video content for now. However, this is set to change. According to a recent developer commit, new capabilities are likely to be added to this feature, including the potential to execute arbitrary HTML code and other […]
The boy who created our website has already set up DDoS protection. Why did our site go down when we have DDoS protection? How many thousands does Qrator want? To properly answer such questions from clients or superiors, it would be wise to know what lies behind the term 'DDoS protection'. Choosing protection services resembles more of a doctor's choice of medication than choosing a table at IKEA. I […]