  Snafu, or Snake Functions, is a modular system to host, execute and manage
language-level functions offered as stateless (micro-)services to diverse
external triggers. The system interfaces resemble those of commercial FaaS
providers but its implementation provides distinct features which make it
overall useful to research on FaaS and prototyping of FaaS-based applications.
This paper argues about the system motivation in the presence of already
existing alternatives, its design and architecture, the open source
implementation and collected metrics which characterise the system.
