GoKawiilNew FTL project runs OS logic in userspace for container security
FTL is an operating system design in which each container runs a userspace library implementing core OS functions like Linux process management, a virtual file system, and TCP/IP. A minimal FTL kernel provides the underlying interface for these userspace components to implement Linux system calls, similar to how a hypervisor operates.
GoKawiil's interpretation of the reporting above, not reported fact.
By moving most OS functionality into userspace libraries rather than the kernel, developers could patch, debug, or extend OS behavior without touching kernel or eBPF code, according to the project's description. This approach aims to combine the security isolation typically associated with virtual machines with the performance and simplicity of lightweight containers, though real-world performance and security trade-offs remain to be independently verified.
- FTL implements OS concepts like process management and networking as a userspace shared library per container
- A minimal FTL kernel interface handles core functions like vCPU, memory, and drivers, similar to a hypervisor
- The design reportedly allows adding features, debugging, or security patches without kernel-level programming
Source: ftl-os.org, 2026-10-03
Published there as: “FTL: A new operating system for clouds”
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