Not enough entropy to support /dev/random in docker containers running in boot2docker

Question

Running out of entropy in virtualized Linux systems seems to be a common problem (e.g. /dev/random Extremely Slow?, Getting linux to buffer /dev/random). Despite of using a

Answer 1

The most elegant solution I've found is running Haveged in separate container:

docker pull harbur/haveged
docker run --privileged -d harbur/haveged

Check whether enough entropy available:

$ cat /proc/sys/kernel/random/entropy_avail
2066