74 lines
2.3 KiB
Bash
Executable file
74 lines
2.3 KiB
Bash
Executable file
#!/bin/sh -e
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# Backup script to be run from pre_update_hook
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# Written by Markus Armbruster, 2005-2012
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# This script is in the public domain.
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# Use: edit configuration variables below to taste, then set
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# pre_update_hook = /wherever/backup
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# in econfig.
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# Rules when running as pre_update_hook:
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# Data directory is working directory.
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# stdin, stdout, stderr are redirected to /dev/null
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# Exit code other than zero cancels update!
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#
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# This script is as simple as possible, since failure cancels the
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# update.
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# Configuration
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# How to name backups
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#
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# If you back up multiple games to the same directories, better change
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# this to include a unique game name.
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#
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# Single name, keep just the last backup:
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name=data
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# Name with timestamp, keep all backups:
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#name=data-`date +%Y-%m-%d-%H:%M`
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# Where to store the backups on the local machine
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#
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# Storing backups on the same machine is stupid, and on the same file
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# system is criminally stupid, so you better change this, unless you
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# copy them to another machine.
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local_dir=../backup
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# Copy backups to remote machine using SSH
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#
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# Don't copy (are you *sure* you want to be stupid?):
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remote_host=
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remote_dir=
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remote_email=
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#
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# Do copy:
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#remote_host=user@host
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#remote_dir=empire/backup
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#email=user@host
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# End of configuration
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# Create local backup directory if necessary
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mkdir -p $local_dir
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# Tar up the data directory
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arc=$local_dir/$name.tar.gz
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tar czf $arc .
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# Copy the backup to another machine with SSH, in the background
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#
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# The obvious method requires a key that is not protected by a
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# passphrase. Trusting such keys remotely is usually a bad idea, but
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# it might be tolerable if a special user runs the server, and that
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# user's privileges are carefully limited.
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if [ "$remote_host" ]
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then
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nohup sh -c "scp -qBp '$arc' '$remote_host:$remote_dir' 2>&1 | mailx -s 'Empire backup save failed' '$email'" </dev/null >/dev/null 2>&1 &
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fi
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#
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# A more secure alternative is to replace the scp command by something like
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# ssh -q -T -o BatchMode=yes -o IdentitiesOnly=yes -i "$HOME/.ssh/empire_id_rsa" $remote_host <"$arc"
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# where $HOME/.ssh/empire_id_rsa contains a private key specifically
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# created for Empire backup, without a passphrase, and authorized_keys
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# on $remote_host contains the matching public key prepended by
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# command="cat >empire/backup/data-`/bin/date +%Y-%m-%d-%H:%M`.tar.gz",no-pty,no-port-forwarding
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