What's FTL?

  • You can build your own OS as a library. This userspace OS design makes it easy to add features, debug, upgrade the OS safely, as if writing applications.
  • FTL kernel isolates containers (userspace OS instances) better than existing monolithic kernels, with a hypervisor-like interface based on a lightweight hardware-based isolation (user mode). You don't need bare-metal machines.
  • FTL is compatible with Linux binaries. For example, the Rust-based HTTP server serving this website is a Linux application running on FTL. You can also run Unikernel-like specialized applications without POSIX abstractions.

How it works

Each container runs a userspace OS. It is a shared library which implements most of OS concepts such as Linux process, VFS, and TCP/IP. FTL kernel provides a minimal interface to implement Linux system calls in userspace, just like a hypervisor.