7 Aug 2012 ralsina   » (Master)

The Minimal Server

I was a sysadmin for a long time. I did that for money, so I never really wanted to spend time doing the same thing in my own time, which lead to a severe case of cobbler's children walking barefoot in my private server.

So, today at lunch, I decided to clean up my garbage. So this is what I ended up with, which is the minimal server that is good enough to be generally useful for me.

Hosting

This is a cheap VPS provided by the nice folks at burst.net who are not giving me anything to speak nice things about their service. However, I will do it anyway:

  • Crazy cheap ($5.50 but I have a 20% discount for life)
  • Good amount of monthly bandwidth
  • Lots of disk space
  • Good uptime
  • Fast network
  • Very cheap
  • Decent performance

Distribution

I had CentOS 5 installed, and it stays. If burst ever starts offering Ubuntu Precise, I may switch. Or, since this works, I may not.

What's good about CentOS? It's stable and boring.

What's bad about CentOS? It's too boring. Lots of cool stuff just isn't packaged.

Web Server

I need to serve a bunch of domains, but I have a peculiarity: they are all static sites. I want:

  • Low resource usage
  • Decent performance (that mostly involves supporting ranges and content negotiation)
  • Stable
  • Support directory indexes
  • Easy configuration
  • Virtual domains by name

Almost any server works well for this. Even Apache, except for the easy configuration bit. I ended up with gatling because it fits those criteria fairly well.

  • It uses about 1.4MB of RAM , which is always nice in a VPS
  • It's pretty fast
  • Has not crashed in 2 hours?
  • Supports indexes
  • Here's the configuration: "-c /srv/www -P 2M -d -v -p 80 -F -S" (yes, there is no config file at all)
  • Virtual domains are just folders and symlinks inside /srv/www which is the easiest possilble way to do it.
  • It supports reverse proxying for when I want to try a python web app I am working on.

Mail Server

No, I don't want a mail server. I have gmail and/or a real mail server for that. I want to get the mails from cron. For this, I used ssmtp and an extra gmail account. It works, and here's the whole config:

root=roberto.alsina@gmail.com
mailhub=smtp.gmail.com:587
UseTLS=YES
UseSTARTTLS=YES
AuthMethod=LOGIN
AuthUser=roberto.alsina.3@gmail.com
AuthPass=notputtingthetrueoneheredude

The best I can say about this configuration is that it works, and doesn't involve running a daemon.

Misc

For when I need to be in two places at the same time: OpenVPN rules, and there is no argument. I have a squid running occasionally, and there is a Quassel core for IRC stuff. I installed mosh to make ssh less painful, rsync handles file deployment and backup storage, cron schedules stuff, and that's it.

Status

Plenty of free RAM and CPU (yes, that's the full process list):

[root@burst1 ~]# ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.1   2156   664 ?        Ss   22:01   0:00 init [3]
root      1135  0.0  0.1   2260   576 ?        S<s  22:01   0:00 /sbin/udevd -d
root      1518  0.0  0.1   1812   572 ?        Ss   22:01   0:00 syslogd -m 0
root      1594  0.0  0.1   7240  1032 ?        Ss   22:01   0:00 /usr/sbin/sshd
root      1602  0.0  0.2   4492  1112 ?        Ss   22:01   0:00 crond
root      1630  0.0  0.1   5684   716 ?        Ss   22:01   0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -n 2
root      1631  0.0  0.0   5684   444 ?        S    22:01   0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -n 2
root      1636  0.0  0.2   3852  1372 ?        S    22:01   0:01 /opt/diet/bin/gatling -c /srv/www -P 2M -d -v -p 80 -F -S
root      1677  0.0  0.2   4284  1232 ?        Ss   22:02   0:00 SCREEN /root/quasselcore-static-0.7.1
root      1678  0.0  2.1  36688 11148 pts/0    Ssl+ 22:02   0:03 /root/quasselcore-static-0.7.1
root      3228  1.0  0.7  12916  4196 ?        Ss   23:28   0:13 mosh-server new -s -c 8
root      3229  0.0  0.3   3848  1588 pts/2    Ss   23:28   0:00 -bash
root      3275  0.0  0.1   2532   908 pts/2    R+   23:48   0:00 ps aux
[root@burst1 ~]# w
 23:49:03 up  1:47,  1 user,  load average: 0.00, 0.01, 0.00
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/2    186.153.52.253   23:28    0.00s  0.01s  0.00s w
[root@burst1 ~]# free
             total       used       free     shared    buffers     cached
Mem:        524800      49100     475700          0          0          0
-/+ buffers/cache:      49100     475700
Swap:            0          0          0

All things considered, fairly happy with the result.


Syndicated 2012-08-07 16:17:40 from Lateral Opinion

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