TECH.kulish.com

More for my records than anyone elses. Still someone may find some use for this information.

I started off by doing a standard network install of Debian Woody. After that I installed ssh and got to work.

Before doing anything else, I create a “poor man’s” disk mirror. This probably isn’t the best solution but it works for my needs. The first thing we need to do here is take a look at the current partition info:

venus:/# df | grep ^/dev
/dev/hde2 1999804 100580 1899224 6% /
/dev/hde1 999868 42036 957832 5% /boot
/dev/hde5 4000088 163476 3836612 5% /usr
/dev/hde6 999868 32840 967028 4% /tmp
/dev/hde7 4000088 37680 3962408 1% /home
/dev/hde8 16028688 198940 15829748 2% /var

The easiest way I have found to mirror the partition structure is using sfdisk.

venus:~# sfdisk -d /dev/hde | sfdisk /dev/hdg

sfdisk sends quite a bit of information to STDOUT, but the important data looks something like this:

Device Boot Start End #sectors Id System
/dev/hdg1 * 63 1999871 1999809 83 Linux
/dev/hdg2 1999872 5999615 3999744 83 Linux
/dev/hdg3 56058912 60058655 3999744 82 Linux swap
/dev/hdg4 5999616 56058911 50059296 5 Extended
/dev/hdg5 5999679 14000111 8000433 83 Linux
/dev/hdg6 14000175 15999983 1999809 83 Linux
/dev/hdg7 16000047 24000479 8000433 83 Linux
/dev/hdg8 24000543 56058911 32058369 83 Linux
Successfully wrote the new partition table

Re-reading the partition table …

The reiserfs filesystem was used, so reiserfsprogs is needed:

venus:/# apt-get install reiserfsprogs
venus:/# mkfs.reiserfs /dev/hdg2 (all the way through /dev/hdg8 from above)
Created a directory structure for mount points.
Mounted all the hdg filesystems.

venus:/# mount | grep ^/dev
/dev/hde2 on / type reiserfs (rw)
/dev/hde1 on /boot type reiserfs (rw)
/dev/hde5 on /usr type reiserfs (rw)
/dev/hde6 on /tmp type reiserfs (rw)
/dev/hde7 on /home type reiserfs (rw)
/dev/hde8 on /var type reiserfs (rw)
/dev/hdg2 on /SYSMIRROR/root type reiserfs (rw)
/dev/hdg1 on /SYSMIRROR/boot type reiserfs (rw)
/dev/hdg5 on /SYSMIRROR/usr type reiserfs (rw)
/dev/hdg6 on /SYSMIRROR/tmp type reiserfs (rw)
/dev/hdg7 on /SYSMIRROR/home type reiserfs (rw)
/dev/hdg8 on /SYSMIRROR/var type reiserfs (rw)

Created a system mirroring script and tested it:

venus:/SYSMIRROR# cat /usr/local/bin/sysmirror.sh
#!/bin/sh
cp -aux / /SYSMIRROR/root
cp -aux /boot/* /SYSMIRROR/boot
cp -aux /usr/* /SYSMIRROR/usr
cp -aux /tmp/* /SYSMIRROR/tmp
cp -aux /home/* /SYSMIRROR/home
cp -aux /var/* /SYSMIRROR/var
touch /var/log/sysmirror

After testing was completed, /etc/fstab was updated with the filesystems.

/dev/hde2 / reiserfs defaults 0 0
/dev/hde3 none swap sw 0 0
proc /proc proc defaults 0 0
/dev/fd0 /floppy auto user,noauto 0 0
/dev/cdrom /cdrom iso9660 ro,user,noauto 0 0
/dev/hde1 /boot reiserfs defaults 0 0
/dev/hde5 /usr reiserfs defaults 0 0
/dev/hde6 /tmp reiserfs defaults 0 0
/dev/hde7 /home reiserfs defaults 0 0
/dev/hde8 /var reiserfs defaults 0 0

/dev/hdg2 /SYSMIRROR/root reiserfs defaults 0 0
/dev/hdg1 /SYSMIRROR/boot reiserfs defaults 0 0
/dev/hdg5 /SYSMIRROR/usr reiserfs defaults 0 0
/dev/hdg6 /SYSMIRROR/tmp reiserfs defaults 0 0
/dev/hdg7 /SYSMIRROR/home reiserfs defaults 0 0
/dev/hdg8 /SYSMIRROR/var reiserfs defaults 0 0

reboot

Added crontab entry for the mirroring:

venus:~# crontab -l
#####
# Hourly entries
#####
00 * * * * /usr/local/bin/sysmirror.sh > /dev/null 2>&1

Updated /etc/apt/sources.list to move to Sarge

deb http://mirrors.kernel.org/debian/ sarge main non-free contrib
deb-src http://mirrors.kernel.org/debian/ sarge main non-free contrib
deb http://non-us.debian.org/debian-non-US sarge/non-US main contrib non-free
deb-src http://non-us.debian.org/debian-non-US sarge/non-US main contrib non-free
deb http://security.debian.org/ sarge/updates main contrib non-free

apt-get update
apt-get upgrade
apt-get dist-upgrade

Installed the following deb packages:

smp kernel
mysql
ntp-refclock
bind9
ssmtp
host

Created directory structure for NFS mount points and system backup:
Kludged a script together to backup over the network:

venus:~# cat /usr/local/bin/nfsmirror.sh
#!/bin/sh
mount 10.1.1.1:/DATA/backup /DATA
cp -aux / /DATA/venus/root
cp -aux /boot/* /DATA/venus/boot
cp -aux /home/* /DATA/venus/home
cp -aux /usr/* /DATA/venus/usr
cp -aux /var/* /DATA/venus/var
cp -aux /tmp/* /DATA/venus/tmp
touch /var/log/nfsmirror
umount /DATA

Added cron entry to backup entire system to the NFS mount once per day:

venus:~# crontab -l
#####
# Hourly entries
#####
00 * * * * /usr/local/bin/sysmirror.sh > /dev/null 2>&1

#####
# Daily entries
#####
30 00 * * * /usr/local/bin/nfsmirror.sh > /dev/null 2>&1

Installed mysqlbu.pl script.
Edited to fit environment.
Added cron entry to backup all databases once per hour, just prior to hourly system mirror:

#####
# Hourly entries
#####
00 * * * * /usr/local/bin/sysmirror.sh > /dev/null 2>&1
45 * * * * /usr/local/bin/mysqlbu.pl > /dev/null 2>&1

#####
# Daily entries
#####
30 00 * * * /usr/local/bin/nfsmirror.sh > /dev/null 2>&1