You check on how many bytes of entropy are available using
Our counts are always less than 200. That is not enough. And so my concern is that I have a system that depends on random UUIDs that does not have enough entropy and so, so as not to block, it is using math to get randomness. I don't trust math randomness.
I don't yet have the full picture yet. Hopefully I will soon.
See Check available entropy in Linux.
Update: We have deployed haveged and available entropy is always over 1,000.