Simple mysql and filesystem backups with S3 support (with optional encryption)
We needed a backup solution that will satisfy the following requirements:
- simple to install and configure
- support for simple ‘tar’ backups of directories (with includes/excludes)
- support for simple mysqldump of mysql databases
- support for symmetric or public key encryption
- support for local filesystem and Amazon S3 for storage
- support for backup rotation. we don’t want backups filling all the diskspace or cost a fortune on S3
And since we didn't find any, we wrote our own :)
Usage: astrails-safe [OPTIONS] CONFIG_FILE Options: -h, --help This help screen -v, --verbose be verbose, duh! -n, --dry-run just pretend, don't do anything. -L, --local skip S3
Note: CONFIG_FILE will be created from template if missing
If you want to encrypt your backups you have 2 options:
- use simple password encryption
- use GPG public key encryption
For simple password, just add password entry in gpg section. For public key encryption you will need to create a public/secret keypair.
We recommend to create your GPG keys only on your local machine and then transfer your public key to the server that will do the backups.
This way the server will only know how to encrypt the backups but only you will be able to decrypt them using the secret key you have locally. Of course you MUST backup your backup encryption key :) We recommend also pringing the hard paper copy of your GPG key 'just in case'.
The procedure to create and transfer the key is as follows:
run 'gpg --gen-gen' on your local machine and follow onscreen instructions to create the key (you can accept all the defaults).
import public key on the remote system:
$ gpg --import firstname.lastname@example.org gpg: key 45CA9403: public key "Test Backup " imported gpg: Total number processed: 1 gpg: imported: 1
since we don't keep the secret part of the key on the remote server, gpg has no way to know its yours and can be trusted. To fix that we can sign it with other trusted key, or just directly modify its trust level in gpg (use level 5):
$ gpg --edit-key email@example.com ... Command> trust ... 1 = I don't know or won't say 2 = I do NOT trust 3 = I trust marginally 4 = I trust fully 5 = I trust ultimately m = back to the main menu Your decision? 5 ... Command> quit
export your secret key for backup (we recommend to print it on paper and burn to a CD/DVD and store in a safe place):
$ gpg -a --export-secret-key firstname.lastname@example.org > email@example.com
safe do local :path => "/backup/:kind/:id" s3 do key "...................." secret "........................................" bucket "backup.astrails.com" path "servers/alpha/:kind/:id" end gpg do # symmetric encryption key # password "qwe" # public GPG key (must be known to GPG, i.e. be on the keyring) key "firstname.lastname@example.org" end keep do local 2 s3 2 end mysqldump do options "-ceKq --single-transaction --create-options" user "root" password "............" socket "/var/run/mysqld/mysqld.sock" database :blog database :servershape database :astrails_com database :secret_project_com end tar do archive "git-repositories", :files => "/home/git/repositories" archive "dot-configs", :files => "/home/*/.[^.]*" archive "etc", :files => "/etc", :exclude => "/etc/puppet/other" archive "blog-astrails-com" do files "/var/www/blog.astrails.com/" exclude ["/var/www/blog.astrails.com/log", "/var/www/blog.astrails.com/tmp"] end archive "astrails-com" do files "/var/www/astrails.com/" exclude ["/var/www/astrails.com/log", "/var/www/astrails.com/tmp"] end end end
Copyright (c) 2009 Astrails Ltd. See LICENSE for details.