setting up a db template on rackspace cloud debian

gistfile1.txt

1. system upgrade (lenny to squeeze)
================
apt-get update
apt-get upgrade
// keep old configs - hit [enter]
nano /etc/apt/source.list
// replace lenny with squeeze
apt-get update
apt-get upgrade
// keep old - keep hitting [enter]
apt-get dist-upgrade
// keep old - keep hitting [enter]
shutdown -r now
// making sure everything works
// box should come back within 30 sec
unset HISTFILE
rm .bash_history
echo "unset HISTFILE" >> .profile
// this turns off the bash history
echo "vm.swappiness=0" >> /etc/sysctl.conf
// turn off swappiness
nano /etc/rsyslog.conf
// comment out all rules like:
#auth,authpriv.*                        -/var/log/auth.log
#*.*;auth,authpriv.none         -/var/log/syslog
#cron.*                         -/var/log/cron.log
#daemon.*                       -/var/log/daemon.log
#kern.*                         -/var/log/kern.log
#lpr.*                          -/var/log/lpr.log
#mail.*                         -/var/log/mail.log
#user.*                         -/var/log/user.log
// all the way down to the end of the file
// but leave the very last block "daemon.*;mail.*; and following lines untouched
// also the a bit further up from the last line *.emerge *
mv /etc/cron.daily/logrotate /etc/cron.hourly/
// move the daily logrotate to hourly
nano /etc/logrotate.conf
// change "weekly" to "daily"
// change "rotate 4" to "rotate 0"
// add the line "shred" and another line "size 0k" after "#compress"
// in the "wtmp" and "btmp" config block comment out "monthly" and "rotate 1"
// now open all log rotate configs within /etc/logrotate.d/ and comment out 
// every line that says daily, monthly, yearly, compress, rotate or size
/etc/init.d/cron restart
nano /etc/default/rsyslog
// change "-c4" to "-m 0"
nano /etc/ssh/sshd_config
// change default listen Port from 22 to something else for example 222



2. installing mongodb
=====================
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10
nano /etc/apt/source.list
// add following line to the bottom
// deb http://downloads-distro.mongodb.org/repo/debian-sysvinit dist 10gen
// use "ubuntu-upstart" for ubuntu
apt-get update
apt-get install mongodb-10gen
ps aux | grep mongodb
// should show a running mongodb process
/etc/init.d/mongodb stop
// turn off mongodb for reconfigure
nano /etc/mongodb.conf
// change the following:
logpath = /dev/null
logappend = false
// comment out following if in use:
#port
#bind_ip
nano /etc/init.d/mongodb
// open the init script and add the following after ENABLE_MONGODB=yes
IP=`ifconfig | grep 'inet addr:10' | cut -d: -f2 | cut -d ' ' -f1`
// change LOGPATH into /dev/null
// and change the following line:
DAEMON_OPTS=${DAEMON_OPTS:-"--dbpath $DATA --logpath $LOGFILE run"}
// into this:
DAEMON_OPTS=${DAEMON_OPTS:-"--bind_ip $IP --shardsvr --replSet shard1 --dbpath $DATA --logpath $LOGFILE run"}
// remember that the replSet name is the only hardcoded variable that 
// has to be the same within all replica set mongodb instances within a shard!
// you need to set this variable by hand - there is literally no way to feed it 
// into the config without adding meta data on startup or server managing scripts
// IMPORTANT: this single variable has to be manually set for reach replica set!
/etc/init.d/mongodb start
ps aux | grep mongodb
// should look like this:
// /usr/bin/mongod --bind_ip 10.177.167.55 --shardsvr --replSet shard1 --dbpath /var/lib/mongodb --logpath /var/log/mongodb/mongodb.log run --config /etc/mongodb.conf


3. installing redis
===================
nano /etc/apt/source.list
// add following lines
deb http://packages.dotdeb.org stable all
deb-src http://packages.dotdeb.org stable all
// and save
wget -q -O - http://www.dotdeb.org/dotdeb.gpg | sudo apt-key add -
// add dotdeb gpg key
apt-get update
apt-get install redis-server
nano /etc/logrotate.d/redis-server
// comment out every line that says daily, monthly, yearly, compress, rotate or size
// looks like this:
/var/log/redis/*.log {
#        weekly
        missingok
        copytruncate
#        rotate 12
#        compress
        notifempty
}
// and save
nano /etc/init.d/redis-config
// add following lines after PIDFILE variable
IP=`ifconfig | grep 'inet addr:10' | cut -d: -f2 | cut -d ' ' -f1`
sed -i "s/127.0.0.1/$IP/g" /etc/redis/redis.conf
// and add the following line inside the start block after the "fi" and before ";;"
sed -i "s/$IP/127.0.0.1/g" /etc/redis/redis.conf
// this will change the local 127.0.0.1 bind ip to the local ip inside the redis.config file 
// and after starting it change it back so the script works for the next restart (even after cloning the image)
/etc/init.d/redis-server restart


4. install memcached
====================
apt-get install memcached
nano /etc/memcached.conf
// comment out -l 127.0.0.1 to:
#-l 127.0.0.1
nano /usr/share/memcached/scripts/start-memcached
// add the following line after "my $params;…" line
my $ip = `ifconfig | grep 'inet addr:10' | cut -d: -f2 | cut -d ' ' -f1`;
// also add the following line after "push @$params, …" and before "$params = join "", @$params;" 
push @$params, "-l ", $ip;
/etc/init.d/memcached restart



5. final
========
shutdown -r now
// make sure (ps aux or ps -HAf) when server comes back mongodb and memcached are running on the internal ip 
// (-l for memcache and bind_ip for mongodb)
// if memcached is not showing the line restart memcached and shutdown -r now again
// it should now definitely show the -l param in the process