Build Your Own Docker with Linux Namespaces, Cgroups, and Chroot

• Moby

  212 67,716 10.0 Go

  The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems

  

Docker by default also applies a seccomp system call whitelist per [1] and restricts capabilities per [2], amongst numerous other default hardening practices that are applied. If a Docker container really had a need to call the "reboot" system call, this permission could be explicitly added.

More complex sandboxing techniques include opening handles for sockets, pipes, files, etc and then hardening seccomp filters on top to prevent any new handles being opened. In this way, some containers can read/write defined files on a volume without having any ability to otherwise interact with file systems such as opening new files (all file system related system calls could be disabled).

[1] https://github.com/moby/moby/blob/master/profiles/seccomp/de...

[2] https://docs.docker.com/engine/security/#linux-kernel-capabi...

• distroless

  122 17,695 9.3 Starlark

  🥑 Language focused docker images, minus the operating system.

  

Lots of examples without the entire OS as other comments mention, an example would be Googles distroless[0]

[0]: https://github.com/GoogleContainerTools/distroless

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• bocker

  37 11,092 0.0 Shell

  Docker implemented in around 100 lines of bash

• unikraft

  26 2,287 9.8 C

  A next-generation cloud native kernel designed to unlock best-in-class performance, security primitives and efficiency savings.

  

unikernel is not the same microkernel.

I've found these after some quick googling:

https://unikraft.org/

• nanos

  27 2,468 9.2 C

  A kernel designed to run one and only one application in a virtualized environment

  

• kernel

  4 1,057 9.8 Rust

  A Rust-based, lightweight unikernel.

  

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