Let me know if you notice anything broken or borked… just moved the blog to a new server.

Since my last post I’ve added a few new things to my github account… one is a mmorpg rails plugin and another is a server automator for fresh installs to get them production/development ready.

Server Setup Fu

A collection of shell scripts that you run once to setup a bare metal server for development or production.

mmo_fu

A rails plugin to interact with MMO websites like: wow armory, lotro armory, etc.

Servly is also still chugging a long and is going to be offered as SaaS — I’ll post more information about how to sign up once we get closer to launching it.

After about an hour of tinkering around on google and in the terminal here is what you need to do:

wget http://www.lua.org/ftp/lua-5.1.2.tar.gz
tar xfz lua-5.1.2.tar.gz
cd lua-5.1.2
nano src/Makefile

Replace:

 CFLAGS= -O2 -Wall $(MYCFLAGS) 

With:

 CFLAGS= -O2 -Wall -fPIC $(MYCFLAGS) 

make linux install

wget http://luaforge.net/frs/download.php/2384/md5-1.0.2.tar.gz
tar xfz md5-1.0.2.tar.gz
cd md5-1.0.2
make
make install
cd ..
wget http://luaforge.net/frs/download.php/1678/luazlib-0.0.1.rar

wget wget http://www.rarlab.com/rar/unrar-3.7.7-centos.gz
gunzip unrar-3.7.7-centos.gz
chmod +x unrar-3.7.7-centos
./unrar-3.7.7-centos x luazlib-0.0.1.rar
cd luazlib-0.0.1
make
make install

export LUA_CFLAGS="-I/usr/local/include"
export LUA_LIBS="-L/usr/local/lib -llua"

cd LIGHTTPD_DIRECTORY
./configure -with-lua
make
make install

All done!

Thanks to:
http://gadelkareem.com/2007/09/17/dynamic-content-caching-using-lighty-mod_magnet-lua/ && http://www.verlihub-project.org/doku.phpid=howto_install_lua_library_on_64_bit

• v1.2 – 10/27/2008 – RELEASED
  1. Fixed all short tags (if you still get an error let me know, I’m 99.9% sure I got them all)
  2. Script now works properly in sub directories – see demo for in-action.

Took me about 20 minutes to figure out why this wasn’t working when installing yum:

After you follow the instructions at http://wiki.centos.org/TipsAndTricks/BrokenVserver
You get to the part where your trying to install rpm-python. This doesn’t work quite as you’d hoped.Â

Error:

# rpm -Uvh rpm-python-4.4.2-48.el5.i386.rpm

warning: rpm-python-4.4.2-48.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID e8562897

error: Failed dependencies:

        rpm = 4.4.2-48.el5 is needed by rpm-python-4.4.2-48.el5.i386

So clear all the other RPM’s you installed, download these three from the repository (varies if your using 64 bit or i386)

rpm-4.4.2-48.el5.i386.rpm    rpm-python-4.4.2-48.el5.i386.rpm

rpm-libs-4.4.2-48.el5.i386.rpm Â

Make sure all these are present then run:

rpm -Uvh *.rpm

 This will install the libs and the RPM update at the same time so the error isn’t thrown.

I’m always trying to find a good method of monitoring system performance and logging it, but today I ran into a rather strange issue that I couldn’t find on google.

sar 0 was returning high idle percentages:

# sar -u 0

08:17:29 AM       CPU     %user     %nice   %system   %iowait     %idle

08:17:29 AM       all     18.11      0.01     11.66     70.22    3549.42
running top didn't produce 3.5k % idle and in fact the system was nearly 98% idle. 
The quick fix is to simply run

yum update sysstat
That fixed the problem immediately on the box I was using.

Hope this helps someone else.