The /dev/(u)random devices can be linked from the host into a container.
Can (u)random be replaced with a named pipe instead? (assuming some other application (not (u)random) provides input to the named pipe) Or does (u)random have any other functionality then being a FIFO-like device and how would such functionality be emulated without creating a new device?
Use case is having (nearly) 100% reproducible runs of applications with full control over (u)random inside a container. Having secure random numbers is of no concern.