What software should be installed outside the docker container?

Question

linux

Greetings, I just started to study the topic of Docker containers and it became interesting what can and should be installed in a docker container, and what needs to be installed directly into the operating system itself without any containers? Is it possible to install a firewall in a container or is it better just in the operating system?

Answer 1

I think that such questions should not be asked - you yourself write "just started learning about Docker containers". After all, at first it’s better to read in more detail and consistently familiarize yourself with the documentation in Russian , moreover, step by step and chewed.
They will not rewrite a ton of information for you here, especially since there is no single answer to your question.
Start, along the way, begin to understand the concept of how it works, and then ask specific questions "I do this, but the result is not as expected" - then the question will be adequate.

Answer 2

> that it is possible and necessary to install in the docker container
Soft in a non-standard configuration and / or built with non-standard options and / or having a version different from the one in the distro turnips.
> what needs to be installed directly into the operating system itself without any
containers