This is a daemon which watches for new domains appearing on a Xen host and connects to them, offering them entropy from dom0.
To start the daemon:
sudo xentropy --daemon
The entropy data is currently read from /dev/urandom and sent
to the domain on a specially named "console" (also called a
channel).
xentropyd applies a simple rate-limiter to each connection to
prevent any domain stealing all of dom0's entropy.
xentropyd is similar in purpose to
virtio-rng, except that
xentropyd targets Xen and works with both PV and HVM domains.
Version 1 of the entropy transport protocol is defined here.
First install opam.
Second install necessary headers e.g.
apt-get install libxen-dev
Third build the binary
opam install xentropyd