's3backup' adc contributed by David Bremner
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Sitaram Chamarty
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contrib/adc/s3backup
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contrib/adc/s3backup
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#!/usr/bin/perl
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# Copyright 2011, David Bremner <bremner@debian.org>
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#
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# This add-on to gitolite is licensed under the same terms as gitolite
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# At the time of this writing this is GPL-2, but I also grant
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# Sitaram Chamarty the right to re-license as he chooses.
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=pod
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S3BACKUP - Backup the whole gitolite home directory to amazon s3.
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RUNNING
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To run it (assuming you call this "s3backup")
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As an ADC, only by a user with read access to gitolite-admin :
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ssh git@server s3backup [-v error|warning|notice|info|debug] [subcommands]
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You must pass the AWS_SECRET_ACCESS_KEY on stdin.
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SUBCOMMANDS
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You may optionally pass one of the following sub commands
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=over
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=item incr|full
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Run incremental or full backup. By default, leave it to duplicity to
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guess.
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=item prune
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remove all but $S3_KEEP_FULL (see Configuration below)
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=back
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OPTIONS
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-v specifies a log level, passed straight to duplicity.
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incr or full specify backup level
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CONFIGURATION
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Make a file ~git/.s3backup.rc that looks like
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$S3_EUROPE=0; # 1 to store in europe
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# (only matters at creation)
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$S3_KEEP_FULL=3; # keep 3 full backups
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$S3_BUCKET="my_bucket"; # s3 bucket name, will be created
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# if it doesn't exist.
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$S3_AWS_KEY_ID="ABADABA57DOO"; # this is the _non_ secret one
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$S3_ENCRYPT_KEY="DEADBEEF AA232332"; # gpg keys, space delimited.
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# note that duplicity will abort if
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# these keys are not trusted
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=cut
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use strict;
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use warnings;
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die "ENV GL_RC not set\n" unless $ENV{GL_RC};
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die "ENV GL_BINDIR not set\n" unless $ENV{GL_BINDIR};
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unshift @INC, $ENV{GL_BINDIR};
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require gitolite or die "parse gitolite.pm failed\n";
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gitolite->import;
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my ($perm, $creator) = check_access("gitolite-admin");
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die "no read access to gitolite-admin\n" unless $perm =~ /R/;
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our ($S3_EUROPE, $S3_BUCKET, $S3_AWS_KEY_ID, $S3_ENCRYPT_KEYS, $S3_KEEP_FULL);
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chdir($ENV{HOME}) or die "chdir $ENV{HOME} : $!\n";
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my $configfile = $ENV{HOME} . "/.s3backup.rc";
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do $configfile or die "error parsing $configfile\n";
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# ANCHOR ALL PATTERNS
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die 'bad value for $S3_EUROPE'
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unless (defined($S3_EUROPE) && $S3_EUROPE =~ m/^0|1$/);
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die 'bad value for $S3_KEEP_FULL'
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unless (defined($S3_KEEP_FULL) && $S3_KEEP_FULL =~ m/^[0-9]+$/);
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die 'bad value for $S3_BACKUP'
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unless (defined($S3_BUCKET) && $S3_BUCKET =~ m/^[a-z\-_0-9\.]+$/);
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die 'bad value for $S3_AWS_KEY_ID'
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unless (defined($S3_AWS_KEY_ID) && $S3_AWS_KEY_ID =~ m/^[A-Z0-9]+$/);
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die 'bad value for $S3_ENCRYPT_KEYS'
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unless (defined($S3_ENCRYPT_KEYS) &&
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$S3_ENCRYPT_KEYS =~ m/^[a-fA-F0-9]+(\s+[a-fA-F0-9]+)*/);
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my $verbosity='notice';
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if (scalar(@ARGV)>0 and $ARGV[0] eq '-v'){
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shift;
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$verbosity = shift;
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}
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die "bad verbosity" unless ($verbosity =~ m/^(error|warning|notice|info|debug)$/);
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my $subcommand=shift || 'default';
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die "bad subcommand" if (defined($subcommand) &&
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$subcommand !~ m/^(incr|full|prune|default)$/);
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$ENV{AWS_ACCESS_KEY_ID}=$S3_AWS_KEY_ID;
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chomp($ENV{AWS_SECRET_ACCESS_KEY}=<>) or
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die "must pass SECRET_ACCESS_KEY on stdin";
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my @args=();
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if ($subcommand ne 'default' ){
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if ($subcommand eq 'prune') {
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push(@args, 'remove-all-but-n-full', $S3_KEEP_FULL, '--force');
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} else {
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push(@args, $subcommand);
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}
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}
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push(@args, '--verb', $verbosity);
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push(@args, '--s3-use-new-style');
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foreach my $key (split(' ',$S3_ENCRYPT_KEYS)){
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push(@args, '--encrypt-key', $key);
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}
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push(@args, '--s3-european-buckets') if ($S3_EUROPE);
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push(@args, $ENV{HOME}) unless ($subcommand eq 'prune');
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push(@args, 's3+http://'.$S3_BUCKET);
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system '/usr/bin/duplicity', @args;
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