User:Nomaster/Backup: Difference between revisions
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<blockquote> | |||
Jesus saves. Buddha does incremental backups. | |||
</blockquote> | |||
In celebration of [http://ask.slashdot.org/story/12/03/31/1543200/ask-slashdot-its-world-backup-day-how-do-you-back-up World Backup Day], I hereby release my backup strategy. | |||
== Features == | |||
* daily backup, fully accessible | |||
* compressed storage | |||
* block device encryption | |||
* '''speed''' | |||
== Requirements == | |||
* external harddrive | |||
* modern linux kernel (use [[Wikipedia:Arch_Linux|Arch Linux]]!) | |||
* current version of btrfs-progs (I have 0.19.20120110-2) | |||
* a strong password (you may follow [http://www.thegeekstuff.com/2008/06/the-ultimate-guide-for-creating-strong-passwords/ this] guide or similar) | |||
== Daily Routine == | |||
# Wake up | |||
# Drink tea | |||
# Go shit | |||
# Exercise Yoga | |||
# Eat breakfast | |||
# '''Backup ALL the files''' (during hygiene) | |||
# Leave home | |||
My external harddrive is totally occupied by a [[Wikipedia:Linux_Unified_Key_Setup|LUKS]] container. After connecting the drive to my laptop, I start like this: | |||
cryptsetup luksOpen /dev/sdb backup | |||
Inside, there is [[Wikipedia:Btrfs|btrfs]] filesystem, I mount using compression. | |||
mount -o compress -t btrfs /dev/sdb /mnt/backup | |||
For may backups, I use rsync (with delete) to copy my files to an external hard drive. Vanished files will be deleted. | |||
rsync -aPv --delete --exclude downloads --exclude music --exclude .cache /home/nomaster/ /mnt/backup/nomaster/ | |||
After each sync, I make a snapshot of this state of my files. | |||
sudo btrfs subvolume snapshot /mnt/backup/nomaster /mnt/backup/nomaster120331 | |||
Lastly, I unmount the filesystem and close the container. | |||
sudo umount /mnt | |||
sudo cryptsetup luksClose backup | |||
Then, I disconnect the drive. | |||
When my drive will be full at some point in the future, I’m going to remove old snapshots to free space occupied by large files deleted a long time ago. | |||
== Initial Setup == | |||
'''I assume the external drive is /dev/sdb. If you have no idea about this, stop right now and come back when you know.''' | |||
First, make sure, the external drive is clear to use. So mount it and have a look at the files if present. | |||
Overwrite everything with zeroes. | |||
sudo dd if=/dev/zero of=/dev/sdb bs=1024 | |||
Format the drive | |||
sudo cryptsetup luksFormat /dev/sdb | |||
(follow the instructions) | |||
Open the crypto container | |||
sudo cryptsetup luksOpen /dev/sdb backup | |||
Create a BTRFS file system | |||
sudo mkfs.btrfs /dev/mapper/backup | |||
Mount it (with compression) | |||
sudo mount -o compress /dev/mapper/backup /mnt | |||
Create a subvolume | |||
sudo btrfs subvolume create /mnt/nomaster # <- insert username here | |||
Unmount, close and continue with '''daily routine'''. | |||
sudo umount /mnt | |||
sudo cryptsetup luksClose backup | |||
Revision as of 04:33, 26 March 2013
Jesus saves. Buddha does incremental backups.
In celebration of World Backup Day, I hereby release my backup strategy.
Features
- daily backup, fully accessible
- compressed storage
- block device encryption
- speed
Requirements
- external harddrive
- modern linux kernel (use Arch Linux!)
- current version of btrfs-progs (I have 0.19.20120110-2)
- a strong password (you may follow this guide or similar)
Daily Routine
- Wake up
- Drink tea
- Go shit
- Exercise Yoga
- Eat breakfast
- Backup ALL the files (during hygiene)
- Leave home
My external harddrive is totally occupied by a LUKS container. After connecting the drive to my laptop, I start like this:
cryptsetup luksOpen /dev/sdb backup
Inside, there is btrfs filesystem, I mount using compression.
mount -o compress -t btrfs /dev/sdb /mnt/backup
For may backups, I use rsync (with delete) to copy my files to an external hard drive. Vanished files will be deleted.
rsync -aPv --delete --exclude downloads --exclude music --exclude .cache /home/nomaster/ /mnt/backup/nomaster/
After each sync, I make a snapshot of this state of my files.
sudo btrfs subvolume snapshot /mnt/backup/nomaster /mnt/backup/nomaster120331
Lastly, I unmount the filesystem and close the container.
sudo umount /mnt sudo cryptsetup luksClose backup
Then, I disconnect the drive.
When my drive will be full at some point in the future, I’m going to remove old snapshots to free space occupied by large files deleted a long time ago.
Initial Setup
I assume the external drive is /dev/sdb. If you have no idea about this, stop right now and come back when you know.
First, make sure, the external drive is clear to use. So mount it and have a look at the files if present.
Overwrite everything with zeroes.
sudo dd if=/dev/zero of=/dev/sdb bs=1024
Format the drive
sudo cryptsetup luksFormat /dev/sdb
(follow the instructions)
Open the crypto container
sudo cryptsetup luksOpen /dev/sdb backup
Create a BTRFS file system
sudo mkfs.btrfs /dev/mapper/backup
Mount it (with compression)
sudo mount -o compress /dev/mapper/backup /mnt
Create a subvolume
sudo btrfs subvolume create /mnt/nomaster # <- insert username here
Unmount, close and continue with daily routine.
sudo umount /mnt sudo cryptsetup luksClose backup