2025 University DevOps #2 - Контейнеризация и Docker

Well, hello everyone, welcome to What kind of second lecture is this? official Yes, but now it’s like the third because we are in the last one turned into two, but officially standards plan second So today We'll talk about containerization. and docker itself. There will be two of these. main topics takka the two main themes of the entire presentation, that is,

what is this anyway? containerization and so on We'll talk about virtualization later and actually What is Docker specifically? we will talk most of the time a little more than a semester half starting from today So What exactly are we going to talk about today? tchm we with virtualization containerization Why is this Tae?

Let's get acquainted with the concept of dock containers and we'll figure out how to deal with it in general Here's what to do in the console the basic commands for work are here and on I'll show them a little bit in practice, as it were I can see in person how they are printed

you need a console returns Why do we need you? Do you know what the Holy Grail is? probably that's why I came up with the whole thing because it's the biggest a problem that we encountered before our admins and predecessors are phrase: Everything works for me, the problem is on your side That is, when we

deployed the application somewhere on the server and it doesn't start And so we sit and We're wondering why this is so. That's actually because the app it turns out different, or more precisely, different the result is a user environment around, that is, in Linux, there is such a thing concept as user environment -

This is all what's outside the core Yes, everything that's responsible for some kind of system behavior settings Well, what's going on in it? What are there? What variables are there? and a console for entering commands and so on a lot of different things What packages are installed that is, everything that is outside