Intensive by Kubernetes: on the work of support

 3r3149. 3r3-31. 3r3133. On February 1-? Slurm-3 will be held, intensively by Kubernetes. Announcement and program here.
3r3-33132.  3r3149. 3r3133. Today I will tell you a little about the internal kitchen: how we help students cope with the practice and what comes of it. At the same time, future participants will understand what to expect from support.
3r3-33132.  3r3149. 3r3133. Intensive by Kubernetes: on the work of support 3r3-33132.  3r3149. 3r3133. I myself go through paid courses 2-3 times a year, always take options with practice, and very rarely finish it. For me, the situation looks as if I ordered a kilogram of steak in a restaurant: ...
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Jira DataCenter - what is it? How does it work? How to deploy?

Jira DataCenter - what is it? How does it work? How to deploy? 3r? 3531. 3r3-31. 3r? 3510. Introduction 3r33511. 3r33518.  3r? 3531. With the spread of the Agile philosophy, Russian IT specialists are gaining more and more expertise and competence in customizing and managing products for development teams, the most popular of which is still Jira. However, working with the highest, most productive and highly available version of it - the Jira Data Center - still raises a lot of questions. In this post I will talk about some of the principles and mechanisms of the Jira DataCenter, which we apply in practice. I'll start with a story about the Jira cluster structure...
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Advanced multi-stage build templates

 3r33338. 3r3-31. 3r3333317. Advanced multi-stage build templates
3r33333.  3r33338. 3r3333317. The multistage assembly feature in Dockerfile files allows you to create small images of containers with a higher level of caching and a smaller amount of protection. In this article, I’ll show several advanced templates — something more than copying files between build and execute steps. They allow you to maximize the effectiveness of the function. However, if you are a beginner in the area of ​​multi-stage assembly, then first, probably, it will not be superfluous to read r3r38. 3r3325 usage guide .
3r33333.  3r33338.
Compatible versions ...
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Saving data from a Linux partition

 3r3118. 3r3-31. Hello! 3r3105.  3r3118. I recently launched one toy in wine on my laptop with Kubuntu ???r3r3105.  3r3118. Everything was stuck and a file system error appeared on restart. 3r3105.  3r3118. There were important data on the laptop, so you need to get it somehow. 3r3105.  3r3118. Welcome under the cut! 3r3105.  3r3118.
3r3105.  3r3118. What comes first to mind? 3r3105.  3r3118. We have 2 ways to solve the problem:
 3r3118. 1. Try to repair the FS and get a working OS
 3r3118. 2. Copy the data and carry Linux
 3r3118. I chose option ? but I will tell about 1 too)
 3r3118. Restore ...
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Performance checks and gradual degradation of distributed systems

 3r33466. 3r3-31. Performance checks and gradual degradation of distributed systems  3r33466.
As always, thanks Fred Hebert and Sargun Dhillon for having read the draft of this article and offered some invaluable advice. 3r311.
In its 3r3r166. speed report 3r3449. 3r318. Tamar Berkovichi
from Box stressed the importance of performance checks during automatic database failover. In particular, she noted that monitoring the runtime of end-to-end queries, as a method for determining database health, is better than simple echo testing (pinging).
switches traffic to another node, thereby eliminating the problem. We had to build in some security ...
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OpenVPN with Extended Authentication and Authorization

 3r33984. 3r3-31. The article discusses the configuration of OpenVPN with additional features:
certificates on tokens for primary authentication (for example, Rutoken) 3r-3243.  3r33984.
LDAP backend for secondary authentication (for example, ActiveDirectory) 3r-3243.  3r33984.
Filtering internal resources available to the userx (via iptables)
 3r33984. The configuration of clients under Linux, Windows and MacOS is also described.
 3r33984. Nyr /openvpn-install , run as root.
 3r33984. 3r33966. 3r3393939. git clone
cd ...
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Quick setup of storage Aerodisk Engine

Quick setup of storage Aerodisk Engine . Also, the guys got their YouTube 3r3159. channel with training videos for setting up and working with the system. And even before the new year, Aerodisk launched 3r3133. promo program in which you can buy storage at a discount of up to 60%! The offer, in our opinion, is excellent. 3r33333.  3r33333. 3r33333.  3r33333. This time Aerodisk provided us with the ENGINE N2 storage system in All-flash configuration for self-study and configuration, and we will share this experience. 3r33333.  3r33333. In the framework of our acquaintance with ENGINE, we will make a cycle of 3 articles:
 3r33333. 3r33333...
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mRemoteNG again cake

 3r3197. 3r3-31. mRemoteNG again cake If you are the administrator of several dozen Windows and Linux servers, packs of switches and routers, then without a remote connection manager you can quickly and safely go crazy. 3r3182.  3r3197. 3r3182.  3r3197. 3r3174. TL; DR 3r3-33175. . mRemote, the development of which was abandoned long ago, has gained a new life. If you use RDCMan or Remote Desktop free from Devolutions - try mRemoteNG! 3r3182.  3r3197. 3r311. 3r3185. 3r3182.  3r3197. 3r3174. mRemote [/b] - In the past, a very popular remote connection manager. Unfortunately, its development was abandoned around 2009. Flaws in the interface...
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Storage Class Memory in the storage system - if you need even faster

 3r3174. 3r3-31. Storage Class Memory in the storage system - if you need even faster As you probably remember, HPE has long invested in the topic of new types of data warehousing (of course, The Machine ) And in optimizing access to the repositories (our membership in Gen-Z consortium ). 3r3143.  3r3174. 3r3143.  3r3174. The goal of this movement is to speed up the work of our customers' applications. And the movement is multilevel: while the completely new architecture of the computer systems The Machine (the so-called memory-centric architecture) is being forged, we understand that we need to accelerate now. Let's see it can be done today, and what will HPE have ...
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High availability of MySQL in GitHub

High availability of MySQL in GitHub3r33762. GitHub uses MySQL as the main data repository for everything that is not related to r3r3748. git therefore, the availability of MySQL is key to the normal operation of GitHub. The site itself, the GitHub API, the authentication system and many other features require access to databases. We use several MySQL clusters to handle various services and tasks. They are set up according to the classical scheme with one
writable node and its replicas.
(the remaining nodes of the cluster) asynchronously reproduce the changes of the main node and provide read access.
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