[web-team] Volunteer

[Rick Moen]

Quoting Josef Grosch (jgrosch at gmail.com):

> My thought on this is to use my existing DNS infrastructure for the
> domain that way we don't have to use memory and cpu cycles in the VM for
> running a DNS server.

I think this is a no-go for SVLUG.  We have...

root at gruyere:~ # grep 'zone:' /etc/nsd3/nsd.conf | wc -l
16
root at gruyere:~ # 

...16 zones for which we do primary nameservice.  Of those....

root at gruyere:~ # grep primary /etc/nsd3/nsd.conf | wc -l
3
root at gruyere:~ # grep secondary /etc/nsd3/nsd.conf | wc -l
13
root at gruyere:~ # 

13 are secondary/slave nameservice, and 3 are primary/master
nameservice.  SVLUG has found it convenient to have ability to arrange
nameservice for arbitrary domains on its own nameserver.  The amount of
bandwidth consumed by this is trivial (as is typical of DNS), and here's
a snapshot of RAM usage:

root at gruyere:~ # ps auxw | grep nsd3 | grep -v grep
nsd       4809  0.0  0.0   5120   784 ?        S     2014   0:22 /usr/sbin/nsd -c /etc/nsd3/nsd.conf
nsd       4810  0.0  0.0   5488   744 ?        S     2014   2:09 /usr/sbin/nsd -c /etc/nsd3/nsd.conf
nsd      20994  0.0  0.0  11728  1020 ?        S     2013   1:31 /usr/sbin/nsd -c /etc/nsd3/nsd.conf
root at gruyere:~ # 

You're probably thinking of BIND levels of resource consumption, but
this is NSD:  Total resident set size is probably just over 1MB, given 
overlapping code routines among the three processes running.


> I'm not a big fan of php, it's a crappy language that looks like it was
> thrown together, not thought out and all it's bad "features" have become
> enshrined.

As I've been saying, my biggest problem with it is the enormous increase
in attack surface, on any system where the PHP interpreter is used
inline to produce Web pages.  The extra RAM _was_ an unwelcome surprise
back when we had 80MB total RAM to play with, but those days are happily
gone.  

As you'll see, on www.svlug.org, even after the minor RAM spending spree
involved in converting to PHP, we're still small potatoes.

root at gruyere:~ # free
             total       used       free     shared    buffers     cached
Mem:       1024884     448288     576596          0     107684     228900
-/+ buffers/cache:     111704     913180
Swap:       262140          0     262140
root at gruyere:~ # 

Here's total RAM usage on the lists.svlug.org host:

svlug:~# free
             total       used       free     shared    buffers     cached
Mem:        513336     496536      16800          0     111504     237400
-/+ buffers/cache:     147632     365704
Swap:      2578128      64056    2514072
svlug:~# 

On lists.svlug.org, the biggest RAM-consumer is multiple instances of spamd
(SpamAssassin in daemon mode).

svlug:~# ps auxw | grep spamd | grep -v grep
nobody    5876  0.0  5.4 28544 28200 ?       S    18:05   0:01 /usr/sbin/spamd --username=nobody --max-children 24 --helper-home-dir=/var/spool/spamassassin/ --nouser-config --max-conn-per-child=100 -d --pidfile=/var/spool/spamassassin/spamd.pid
nobody    5877  0.0  5.7 29688 29424 ?       S    18:05   0:01 spamd child
nobody    5878  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5879  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5880  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5881  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5882  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5883  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5884  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5885  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5886  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5887  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5888  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5889  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5890  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5891  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5892  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5893  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5894  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5895  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5896  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5897  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5898  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5899  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
nobody    5900  0.0  5.4 28544 28200 ?       S    18:05   0:00 spamd child
svlug:~#