documentation VS oci-seccomp-bpf-hook

Both Kata Containers and UTM support virtio-fs, so this is not strictly true. The former can be used as a stand-in replacement for the runtime used by docker desktop[1]. With the latter, one could use a UTM-backed guest as a docker runtime in macOS[2] or run docker directly on the guest[3].

[1] https://github.com/kata-containers/documentation/blob/master...

[2] https://www.codeluge.com/post/setting-up-docker-on-macos-m1-...

[3] https://www.lifeintech.com/2021/11/03/docker-performance-on-...

For services with increased security requirements, it is recommended to use a low-level run-time with a high degree of isolation (gVisior, Kata-runtime)

On the official Kata repo, I found a tutorial only for manually deployed Kubernetes on GCE.

This is new and may not be used much, but it is possible to use part of Kata with part of Firecracker. https://github.com/kata-containers/documentation/wiki/Initia...

If it's using firecracker, it's probably using KVM virtualization while ensuring that the memory the VM consumes is not pinned... that is, that the VM can be swapped out of memory. For reference, firecracker was created by AWS to run and secure AWS Lambda. The hypervisor is written in rust and uses seccomp to eliminate unnecessary system calls. They open sourced it a few years back.

What you gain is a stronger security boundary. Just FYI, since 2019, you can also do this in Kubernetes using Kata containers which will happily shim firecracker. The setup is not simple though.

https://github.com/kata-containers/documentation/wiki/Initia...

Overall, fly.io building infrastructure on this pattern is fantastic and making it accessible is fantastic. Looking forward to seeing how this continues to evolve and am happy to see more infra build on top of firecracker. Very exciting!

I was thinking about how to solve that problem, and I thought of an idea: “What if we record the syscalls that a program makes while it’s running?” I was telling one of my co-workers about my idea, and the next day he sent me a link to a tool he found on GitHub. It turned out that some folks at Red Hat had already made a tool called oci-seccomp-bpf-hook that does exactly what I wanted!

The application should have a seccomp, apparmor or selinux profile according to the principles of least privileges (Udica, Oci-seccomp-bpf-hook, Go2seccomp, Security Profiles Operator)