130 lines
5 KiB
Markdown
130 lines
5 KiB
Markdown
BackupPC_archiveHost_s3
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=======================
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This is a Python script that acts as an interface between
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[BackupPC](http://backuppc.sourceforge.net/) and
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[Amazon S3](http://aws.amazon.com/s3/). It uses BackupPC's
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[archive function](http://backuppc.sourceforge.net/faq/BackupPC.html#archive_functions)
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to extract a tarball and split it into chunks, like the normal archive
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function. Then, the chunks are encrypted using gpg and transmitted to
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S3 using [Boto](http://code.google.com/p/boto/).
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Installation
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------------
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I wrote this script some years ago, and can't remember how to get it going.
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But, here's going to be my best guess :-)
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### Install the prerequisites
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> You will need Python, [Boto](http://code.google.com/p/boto/), and a
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> working BackupPC installation.
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### Download and install this script
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> Something like this seems like a good idea:
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>
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> cd /usr/local/src/
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> git clone git://github.com/rtucker/backuppc-archive-s3.git
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>
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> Then create a link from `/usr/share/backuppc/bin/` to here:
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>
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> ln -s /usr/local/src/backuppc-archive-s3/BackupPC_archiveHost_s3 /usr/share/backuppc/bin/
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### Configure this script
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> Create a file in this directory called `secrets.py`, based upon the
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> `secrets.py.orig` file. It should have your AWS Access and Shared keys,
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> a passphrase that will be used to encrypt the tarballs, and, optionally,
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> a path to a file that contains a maximum upload rate in kilobits per
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> second:
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>
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> accesskey = 'ASDIASDVINASDVASsvblahblah'
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> sharedkey = '889rv98rv8fmasmvasdvsdvasdv'
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> gpgsymmetrickey = 'hunter2'
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> speedfile = '/var/cache/speedlimit.txt'
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>
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> If you use the `speedfile` option, you can change this on the fly to
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> limit upstream bandwidth usage during peak hours, etc.
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### Configure BackupPC
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> From the BackupPC configuration interface, go to `Edit Hosts` and add a
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> new host, `archiveS3`, which looks like the existing `archive` host.
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> Save this, select the `archives3` host, and then `Edit Config` for that
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> host.
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>
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> Change the settings on each tab as follows:
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>
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>> #### Xfer
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>> XferMethod: archive
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>> ArchiveDest: /var/lib/backuppc/archives3
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>> ArchiveComp: bzip2
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>> ArchiveSplit: 500
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>> ArchiveClientCmd: $Installdir/bin/BackupPC_archiveHost_s3 $tarCreatePath $splitpath $parpath $host $backupnumber $compression $compext $splitsize $archiveloc $parfile *
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>>
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>> #### Backup Settings
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>> ClientTimeout: 720000
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>
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> That should be just about it. Note that `ArchiveDest` is where it will
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> stage the tarballs before it uploads them; this must have enough disk
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> space for your archive! `ArchiveSplit` is the size of each tar file,
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> in megabytes; you may want to adjust this for your needs. Also, the
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> `ArchiveClientCmd` is the default, except with the `_s3` added.
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### Use it
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> Go to the main page for the `archives3` host and click `Start Archive`.
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> To start with, just tick the box next to the smallest backup you have,
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> then `Archive selected hosts`. Go with the defaults (which look
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> suspiciously like what you set on the Xfer tab, do they not? :-) and
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> then `Start the Archive`.
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>
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> Watch syslog and hopefully everything will work.
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backup-manager.py
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-----------------
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There is a companion script, `backup-manager.py`, that can be used to see
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what's on S3. Run it with no arguments to get a listing of backups and
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their ages, or use the `--help` argument to see what it can do.
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The "crown jewel" of this whole system is the `script` command, which
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produces a script that can be used to restore a backup. It uses S3's
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[Query String Request Authentication](http://docs.amazonwebservices.com/AmazonS3/latest/dev/index.html?RESTAuthentication.html#RESTAuthenticationQueryStringAuth)
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mechanism to generate temporary URLs to download each file required to
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restore a backup.
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Each night, from `cron`, I run a script:
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#!/bin/sh
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BACKUPMGR=/path/to/backup-manager.py
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# Delete all backups older than 30 days.
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$BACKUPMGR delete --age=30
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# Create restore scripts, valid for one week, for all of my computers
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cd /home/rtucker/Dropbox/RestoreScripts/
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$BACKUPMGR --expire=604800 --host=gandalf script > restore_gandalf.sh
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$BACKUPMGR --expire=604800 --host=witte script > restore_witte.sh
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# etc, etc
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# Output a list of what's on the server
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$BACKUPMGR
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The output of this is mailed to me, so I always know what's going on!
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FAQs
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----
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* BackupPC is written in Perl. Why is this thing written in Python?
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I know Python much better than I know Perl, so I wrote it in Python.
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The good news is that BackupPC doesn't care, but it does mean this
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probably won't be part of the BackupPC main distribution any time soon.
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* Is this project dead?
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You could say that. A lot of [my projects](https://github.com/rtucker/)
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are one-off scripts that solve a very specific need I have, and I don't
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put too much thought into making them useful for other people. This
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script works for me and (sorta) meets my needs, so that's where it is.
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