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