On Wednesday 30 November 2005 1:59 pm, A. Khattri wrote:
>
> Im wondering if anyone has written a script (or maybe there's a tool to do
> this) that will make binary packages of everything installed on a server
> which can then be used to perform very quick restores in the event of a
> major failure?
>
I use the following to do a quick and complete restore for a remote gentoo
server at 1and1.
----------------------------------------
| Linux Backup and Bare Metal Recovery |
----------------------------------------
-- Backup
1) save metadata about how the disk is partitioned.
# sfdisk -l > /etc/partition.bak
# cp /etc/fstab /etc/fstab.bak
2) back up master boot record (MBR)
# dd if=/dev/hda of=/etc/mbr.bak bs=512 count=1
3) back up the operating system:
# mount /boot ## if its not already
# cd /
# tar -jcf --anchored --exclude '/sys' --anchored --exclude '/proc'
--anchored --exclude '/lost+found' - / | ssh target "cat >
filename.tar.bz2"
TODO: ssh -> ftp for 1and1
-- Restore
1) boot rescue mode ( debian 2.6 at 1and1 )
2) partition drive(s)
# ssh backupserver 'cat /etc/partition.bak'
Disk /dev/sda: 9729 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting
from 0
Device Boot Start End #cyls #blocks Id System
/dev/sda1 * 0+ 8 9- 72261 83 Linux
/dev/sda2 9 133 125 1004062+ 82 Linux swap /
Solaris
/dev/sda3 134 9728 9595 77071837+ 83 Linux
/dev/sda4 0 - 0 0 0 Empty
# sfdisk /dev/sda << EOF
0,9,83,*
9,125,82
134,9595,83
,,0;
EOF
notes:
sfdisk reads lines of the form <start> <size> <id> <bootable>
<c,h,s> <c,h,s>
where each line fills one partition descriptor.
3) create file systems
# mke2fs /dev/sda1
# mke2fs -j /dev/sda3
# mkswap /dev/sda2
# mkdir /mnt/gentoo
# mkdir /mnt/gentoo/boot
# swapon /dev/sda2
# mount -t ext3 /dev/sda3 /mnt/gentoo
# mount /dev/sda1 /mnt/gentoo/boot
4) restore OS and data
# cd /mnt/gentoo
# ssh target "cat filename.tar.bz2" | tar jpvxf -
notes:
-j Decompress with bzip2
-p Preserve permissions
-v Verbose
-x Extract
-f File
TODO: ssh -> ftp for 1and1
5) restore MBR
# dd if=/mnt/gentoo/etc/mbr.bak of=/dev/sda bs=512 count=1
notes:
one could run grub-install --no-floppy /dev/sda instead.
--end
--
Michael Irey
System Administrator
......................................................................
SightWorks, Inc.
5331 SW Macadam Avenue, Suite 348
Portland, Oregon 97239
Web: http://www.sightworks.com
SightWorks : Creative Internet Technologies
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