Hello all,
I'm implementing a simple SSL forward proxy using relayd.
Configuration has been fine, as was testing. There seems to be one
issue with memory consumption, however.
To better illustrate my issue, here follows an excerpt of /etc/relayd.conf :
http protocol httpsfilter {
tcp { nodelay, sack, socket buffer 65536, backlog 1024 }
return error
match header set "Keep-Alive" value "$TIMEOUT"
match header set "Connecton" value "close"
pass quick url file "/etc/relayd.d/custom_whitelist"
block url file "/etc/relayd.d/custom_blacklist"
include "/etc/relayd.d/auto_blacklist"
ssl ca key "/etc/ssl/private/ca.key" password "password"
ssl ca cert "/etc/ssl/ca.crt"
}
So basically it checks against a custom whitelist, then a custom
blacklist, and finally an "auto" blacklist (which is the main source
of the problem). Using a few URLs with both custom black/white lists
poses no issue, but when attempting to load a somewhat bigger URL list
downloaded from the internet (I'm using
ftp://ftp.ut-capitole.fr/pub/reseau/cache/squidguard_contrib/blacklists.tar.gz)
I run into memory problems.
For example, here is relayd's memory usage when only the custom
white/black lists are loaded (2 URLs total, no big deal):
# ps aux | grep relayd
USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND
_relayd 17238 0.0 0.1 1528 3208 ?? I 3:27PM 0:00.01
relayd: relay (relayd)
_relayd 14280 0.0 0.1 1524 3176 ?? I 3:27PM 0:00.02
relayd: relay (relayd)
_relayd 30448 0.0 0.1 1396 2812 ?? I 3:27PM 0:00.01
relayd: ca (relayd)
_relayd 10020 0.0 0.1 1376 2768 ?? I 3:27PM 0:00.01
relayd: ca (relayd)
_relayd 25775 0.0 0.1 1400 2852 ?? I 3:27PM 0:00.01
relayd: ca (relayd)
root 346 0.0 0.1 1912 3672 ?? Is 3:27PM 0:00.02
relayd: parent (relayd)
_relayd 15883 0.0 0.1 1440 2828 ?? I 3:27PM 0:00.01
relayd: pfe (relayd)
_relayd 32000 0.0 0.1 1220 2560 ?? I 3:27PM 0:00.01
relayd: hce (relayd)
_relayd 2677 0.0 0.1 1516 3188 ?? I 3:27PM 0:00.01
relayd: relay (relayd)
Now loading the "phishing/domains" URL list, which has about ~63k
entries. relayd's "parent" process ballons to over 2GB memory usage
(I'm assuming it's reading the URL lists and building a data structure
for the relays), and after that the relays stabilize with the
following memory usage:
# ps aux | grep relayd
USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND
_relayd 12982 0.0 12.9 516728 526288 ?? S 3:31PM 0:03.44
relayd: relay (relayd)
_relayd 1206 0.0 0.1 1368 2836 ?? I 3:31PM 0:00.01
relayd: ca (relayd)
root 25673 0.0 2.7 155616 111228 ?? Is 3:31PM 0:16.35
relayd: parent (relayd)
_relayd 15513 0.0 0.1 1416 2832 ?? S 3:31PM 0:00.01
relayd: pfe (relayd)
_relayd 15643 0.0 0.1 1200 2560 ?? I 3:31PM 0:00.01
relayd: hce (relayd)
_relayd 25822 0.0 12.9 516716 526296 ?? S 3:31PM 0:03.37
relayd: relay (relayd)
_relayd 17950 0.0 0.1 1380 2824 ?? I 3:31PM 0:00.01
relayd: ca (relayd)
_relayd 9068 0.0 0.1 1360 2784 ?? I 3:31PM 0:00.01
relayd: ca (relayd)
_relayd 19666 0.0 12.9 516712 526292 ?? S 3:31PM 0:03.46
relayd: relay (relayd)
So that's about ~520 MB of memory per relay process, out of 3 total.
Next I load another URL list alongside the previous one, the
"adult/urls" list, which contains roughtly ~55k entries. Adding up
with the previous list, we have more or less ~118k URLs for relayd to
process. The "parent" process takes a couple minutes to process
everything, going over 4GB VSZ and 2.2GB RSS. After all's said and
done, here's what's shown by ps:
# ps aux | grep relayd
USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND
_relayd 6332 0.0 0.1 1428 2228 ?? I 3:35PM 0:00.01
relayd: ca (relayd)
_relayd 8736 0.0 23.9 967808 976768 ?? I 3:35PM 0:06.81
relayd: relay (relayd)
_relayd 22890 0.0 23.9 967812 976768 ?? I 3:35PM 0:06.77
relayd: relay (relayd)
_relayd 5871 0.0 23.9 967804 976760 ?? I 3:35PM 0:06.33
relayd: relay (relayd)
_relayd 8199 0.0 0.1 1440 2256 ?? I 3:35PM 0:00.01
relayd: ca (relayd)
root 5571 0.0 5.3 315032 214796 ?? Is 3:35PM 1:28.45
relayd: parent (relayd)
_relayd 30781 0.0 0.1 1488 2136 ?? S 3:35PM 0:00.01
relayd: pfe (relayd)
_relayd 1502 0.0 0.0 1272 2040 ?? I 3:35PM 0:00.01
relayd: hce (relayd)
_relayd 29135 0.0 0.1 1432 2236 ?? I 3:35PM 0:00.01
relayd: ca (relayd)
Nearly 1GB of RAM per relay process, and ~214 MB to the parent
process. This server I'm working with has 4GB of RAM, so it can't go
much further. If I attempt to load the biggest URL list from the set,
"adult/domains" (slightly above 1 million entries), the server hangs
up after a while and demands a hard reset.
Is there any configuration parameter I'm missing here? I've reviewed
the manpage a few times, and aside from lowering the number of relays
with "prefork", I can't think of much else. I can, of course, provide
additional information if necessary.
Thanks for your input,
fbscarel
