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Category: Administration

Category Administration

Building a fault-tolerant solution based on Oracle RAC and AccelStor Shared-Nothing architecture

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A considerable number of Enterprise applications and virtualization systems have their own mechanisms for building fault-tolerant solutions. Specifically, Oracle RAC (Oracle Real Application Cluster) is a cluster of two or more Oracle database servers working together to provide load balancing and fault tolerance at the server/application level. To work in this mode, you need a shared storage, in the role of […]

Happy Party or a couple of lines-memories of acquaintance with partitioning in PostgreSQL10

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Preface or how the idea of ​​sectioning came about The beginning of the story is here: Do you remember how it all began. Everything was for the first time and again. After almost all the resources for optimizing the query, at that time, were exhausted, the question arose - what's next? Thus, the idea of ​​partitioning was born. Lyrical digression: Precisely 'at that moment', because as […]

FreeBSD Permissions Mandate Model

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Introduction To provide an additional level of server security, you can use the mandatory access distribution model. This publication will describe how you can run apache in jail with access only to those components that need access for the correct operation of apache and php. By this principle, you can limit not only apache, but also any other stack. Preparation […]

Buildroot - Part 1 - Overview, Minimal System Build, Menu Setup

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Introduction In this series of articles, I want to review the buildroot distribution's build system and share my experience of customizing it. There will be practical experience in creating a small OS with a graphical interface and minimal functionality. First of all, don't confuse the build system with the distribution. Buildroot can build a system from a set of packages that are offered to it. Buildroot is built on makefiles and therefore […]

Monitoring is dead? Long live monitoring

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Since 2008, our company has been primarily engaged in infrastructure management and round-the-clock technical support for web projects: we have more than 400 clients, which is about 15% of Russian e-commerce. Accordingly, a very diverse architecture is supported. If something falls, we are obliged to fix it within 15 minutes. But to understand that an accident has occurred, you need to monitor the project and respond to incidents. […]

Network load balancer architecture in Yandex.Cloud

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Hi, I'm Sergey Elantsev, I'm developing a network load balancer in Yandex.Cloud. Previously, I led the development of the L7 balancer for the Yandex portal - my colleagues joke that no matter what I do, it turns out to be a balancer. I will tell readers of Habr how to manage the load in a cloud platform, how we see the ideal tool to achieve this goal, and how we are moving towards building this tool. For […]

Fear and Loathing DevSecOps

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We had 2 code analyzers, 4 dynamic testing tools, our own crafts and 250 scripts. Not that all this is needed in the current process, but once you start implementing DevSecOps, you have to go to the end. Source. Character creators: Justin Roiland and Dan Harmon. What is SecDevOps? What about DevSecOps? What are the differences? Application Security - what is it about? Why doesn't the classic approach work anymore? Yuri Shabalin knows the answer to all these questions […]

Free antiviruses and firewalls (UTM, NGFW) from Sophos

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I'd like to tell you about free Sophos products that can be used both at home and in the enterprise (details below). Using top solutions from Gartner and NSS Labs will significantly improve your personal security. Free solutions include: Sophos UTM, XG Firewall (NGFW), Antivirus (Sophos Home with web filtering for Win/MAC; for Linux, Android) and removal tools […]

“In November 2018, we were spammed on all fronts.” How I got mailings from spam from a company with a million base

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“Before Black Friday 2018, everything was fine. And then… 2 months of sleepless nights, looking for solutions and testing hypotheses.” Email marketer Ivan Ovoshchnikov told us how to save a mailing list with a million subscribers, which ended up in spam for technical reasons. Hi, I'm Vanya, DreamTeam email marketer. I’ll tell you how, after Black Friday, I got a mailing list with a millionth base from spam. All […]

How to implement ISO 27001: instructions for use

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Today, the issue of information security (hereinafter - IS) of companies is one of the most relevant in the world. And this is not surprising, because in many countries there is a tightening of requirements for organizations that store and process personal data. Currently, Russian legislation requires that a significant proportion of the document flow be kept in paper form. At the same time, the digitalization trend is noticeable: many […]

Analytics for Azure DevOps Services is now public

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Reporting is an important capability for Azure DevOps users who rely on Analytics (Azure Analytics Service) to make data-driven decisions. Today, we're excited to announce that the following Analytics features will be included with Azure DevOps Services at no additional charge. In the near future, customers will see these changes in their accounts. Analytics features that are now […]

VMware NSX for the little ones. Part 5: Set up a load balancer

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Part one. Introductory part two. Configuring Firewall and NAT Rules Part Three. Configuring DHCP Part Four. Routing setup Last time we talked about the capabilities of NSX Edge in the context of static and dynamic routing, and today we will deal with the balancer. Before proceeding with the setup, I would like to briefly recall the main types of balancing. Theory […]

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