What is a container

The Linux kernel's support for namespaces mostly [1]

Isolates an application's view of the operating environment

• Process trees
• Network
• User IDs
• Mounted file systems

Control groups

cgroups provide resource isolation, including the CPU, memory, block I/O and network.

https://www.oracle.com/technical-resources/articles/linux/resource-controllers-linux.html

In summary

Since when does this exist?

Moments in Container History

https://tanzu.vmware.com/content/infographics/moments-in-container-history

Let's talk about Docker

What is docker?

Docker is a set of platform as a service (PaaS) products that use OS-level virtualization to deliver software in packages called containers. [2]

https://docs.docker.com/get-started/overview/#docker-engine

libcontainer = Linux container

https://docs.docker.com/get-started/overview/#container-format

Docker container architecture

https://dvops.cloud/2019/04/05/docker-architecture/

Docker images

AuFS: advanced multi-layered unification filesystem

https://medium.com/@BeNitinAgarwal/docker-containers-filesystem-demystified-b6ed8112a04a

Dockerfile

https://delftswa.github.io/chapters/docker/

https://laptrinhx.com/docker-disk-space-management-1751394010/

Docker architecture

https://docs.docker.com/get-started/overview/#docker-architecture

Docker total architecture diagram

http://prog3.com/sbdm/blog/shlazww/article/details/39178469

Docker vs virtual machines

https://www.researchgate.net/figure/A-comparison-of-the-architecture-of-virtual-machines-and-Docker-software_fig4_299771559

Size

https://www.edureka.co/blog/what-is-docker-container

https://brianchristner.io/docker-image-base-os-size-comparison/

Startup

https://www.researchgate.net/figure/A-comparison-of-the-architecture-of-virtual-machines-and-Docker-software_fig4_299771559

Docker integrations

https://www.researchgate.net/figure/CI-CD-Architecture-using-Docker_fig1_331131851