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This article will explain in detail the example analysis of Docker security for everyone. Xiaobian thinks it is quite practical, so share it with you for reference. I hope you can gain something after reading this article.

We know that the docker run command can be used to run containers. What exactly does Docker do after running this command? These are as follows:

Docker run command initialization.

Docker runs lxc-start to execute the run command.

lxc-start creates a set of namespaces and Control Groups in the container.

Namespace is the first level of isolation, containers are isolated from each other, a container is invisible to the internal running processes of other containers, each container is assigned a separate network stack, so it is impossible for one container to access the sockets of another container. To support IP communication between containers, you must specify the public IP port of the container.

Control Groups is a very important component with the following features:

Responsible for resource accounting and limitation.

Provides CPU, memory, I/O, and network related metrics.

Avoid certain DoS attacks. [Image] Support for multi-tenant platforms

Some key Docker security features include:

The container runs as an unprivileged user.

Aparmor, SELinux, GRSEC solutions can be used for additional layers of security.

Security features of other container systems may be used.

Docker.io API

Used to manage several processes related to authorization and security, Docker provides a REST API. The following table lists some of the commands that this API uses to maintain related security features.

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