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Let's continue on our docker training, in this Docker tutorial, we will discover an important concept of operation and security. Containers remain processes that are launched on the host operating system. Indeed, as we have seen recently, unlike virtual machines, a container does not have its own OS.
Nevertheless, if we talk about a process, we must talk about the user owner of this process. And this is where containers bring ease but also security risks. Thus, containers are often launched as root. This is a fairly high security risk.
In addition, the permissions of the volumes and therefore of the directories present on the host must be adapted to this user.
The user id is therefore essential but can be an important factor in allowing a person isolated in the container to take control of the host machine of the docker container.
Slides & Docker Codes: gitlab.com/xavki/docker-v2
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