docker random study

/ # cat r.lua
local f = io.open('/dev/random',"rb")
while true do
   local content = f:read(16)
   local time = os.date()
   print(time .. " :   " ..content)
end

[root@localhost ~]# lua r.lua

Wed Mar 15 11:00:28 2017 :   'vW3¦41¦¦hM¦

Wed Mar 15 11:05:54 2017 :   ¦z¦?XAc¦¦¦¦¦
                                         ¦
Wed Mar 15 11:09:29 2017 :   Q??b¦%¦¦¦¦
Wed Mar 15 11:16:50 2017 :   ¦0¦Ms=W¦¦¦{¦Y
Wed Mar 15 11:23:18 2017 :   6¦¦¦¦¦¦¦5d¦h&
Wed Mar 15 11:30:12 2017 :   P¦¦¦)¦V¦¦{a¦b¦
Wed Mar 15 11:39:38 2017 :   Ey|¦
Wed Mar 15 11:53:06 2017 :   ¦¦¦¦¦¦¦¦?5¦¦1K¦
Wed Mar 15 11:59:42 2017 :   9¦])!¦¦ZG
                                        ¦
¦k¦¦3¦?¦(¦?¦2:07:20 2017 :   ¦
Wed Mar 15 12:16:29 2017 :   Q'?¦[¦s]¦¦F~¦


/ # lua r.lua

Wed Mar 15 10:57:57 2017 :   ¦;t¦¦¦TS-Egw¦
Wed Mar 15 11:11:15 2017 :   ¦¦f¦B¦('¦¦¦¦`¦¦¦
Wed Mar 15 11:16:00 2017 :   ¦&Y¦¦¦W¦3¦5¦'¦¦
Wed Mar 15 11:20:38 2017 :   ¦[¦~       E0¦+¦F¦\
Wed Mar 15 11:32:12 2017 :   j¦d{8¦t>/¦¦N¦
Wed Mar 15 11:38:52 2017 :   ¦l¦¦B¦b¦F¦
Wed Mar 15 11:43:02 2017 :   R¦¦¦]FMD¦¦¦R¦¦
Wed Mar 15 11:50:06 2017 :   ?¦Y¦¦¦D?¦¦?¦
Wed Mar 15 11:55:03 2017 :   ¦Ezy1¦Xs¦¦¦¦¦¦
Wed Mar 15 12:00:42 2017 :   N¦¦a¦¦\¦t#K^g¦¦
Wed Mar 15 12:13:55 2017 :   ¦w¦U>¦o(_¦/¦;¦¦

/ # lua r.lua

Wed Mar 15 11:02:58 2017 :   ¦Gm5U'¦¦¦¦'¦
Wed Mar 15 11:06:37 2017 :   x¦+4y¦¦¦¦#`¦
Wed Mar 15 11:22:31 2017 :   >¦
c¦/¦{2¦M¦
Wed Mar 15 11:26:12 2017 :   ?=K
                                ¦¦¦¦¦k
Wed Mar 15 11:35:03 2017 :   XwS¦¦E¦L¦¦L¦¦O
Wed Mar 15 11:41:34 2017 :   ¦[¦W¦¦/~¦

Wed Mar 15 11:45:29 2017 :   ¦Q¦¦¦Hg¦&!¦¦¦
Wed Mar 15 11:57:52 2017 :   Y,¦?¦N¦P¦?¦Z
Wed Mar 15 12:05:22 2017 :   BK#¦¦z¦p)H¦j¦H¦
?a¦wMar 15 12:11:09 2017 :   ¦z¦?¦/b{
Wed Mar 15 12:15:40 2017 :   ¦¦IQ¦¦^Oe¦¦


docker pull harbur/haveged
docker run --privileged -d harbur/haveged
$ cat /proc/sys/kernel/random/entropy_avail
2066