- pre-hook script to do mysql backup via bacula (old, 2009-04-17)

Changed files:
    bacula-backup-mysql -> 1.1

diff --git a/bacula-backup-mysql b/bacula-backup-mysql
new file mode 100644 (file)
index 0000000..e41b5f8
--- /dev/null
+++ b/bacula-backup-mysql
@@ -0,0 +1,120 @@
+#!/usr/bin/perl -w
+use strict;
+use POSIX qw(setuid setgid);
+
+use DBI;
+use File::Temp qw(tempdir);
+use File::Path qw(rmtree);
+use delfi::mycnf;
+
+# path to ini-style config
+my $config = '/etc/bacula/backup-mysql.conf';
+my $c = new delfi::mycnf($config);
+# force reading config file before we switch user
+$c->get("");
+
+# how change to user mysql after we've read config
+unless ($<) {
+       my $uid = getpwnam('mysql');
+       my $gid = getgrnam('mysql');
+       die "Can't find user/group mysql\n" unless $uid or $gid;
+
+       $) = "$gid $gid";
+       $( = $gid;
+       $> = $< = $uid;
+}
+
+# setup tmpdir
+my $backup_dir = $c->get('options', 'outdir') or die "'outdir' not defined in config\n";
+my $tmpdir = $c->get('options', 'tmpdir')  or die "'tmpdir' not defined in config\n";
+
+if (!-d $backup_dir && !mkdir($backup_dir) && !-d $backup_dir) {
+       die "backup dir '$backup_dir' not present and can't be created\n";
+}
+if (!-d $tmpdir && !mkdir($tmpdir) && !-d $tmpdir) {
+       die "tmpdir '$tmpdir' not present and can't be created\n";
+}
+
+# process each cluster
+for my $cluster ($c->get('clusters', 'cluster')) {
+       print ">>> $cluster\n";
+       backup_cluster($cluster);
+       print "<<< $cluster\n";
+}
+
+# 
+# Usage: mysqlhotcopy $CLUSTER $DATABASE $USERNAME $PASSWORD $SOCKET
+#
+sub mysqlhotcopy {
+       my ($cluster, $database, $user, $password, $socket) = @_;
+
+       my $dstdir = tempdir("bbm.XXXXXX", DIR => $tmpdir);
+
+       # make backup with mysqlhotcopy
+       my @shell = ('mysqlhotcopy');
+       push(@shell, '-u', $user) if $user;
+       push(@shell, '-p', $password) if $password;
+       push(@shell, '-S', $socket) if $socket;
+       push(@shell, $database, $dstdir);
+       system(@shell) == 0 or die "mysqlhotcopy failed: $?\n";
+
+       # put it to "production dir"
+       my $cluster_dir = "$backup_dir/$cluster";
+       if (!-d $cluster_dir && !mkdir($cluster_dir) && !-d $cluster_dir) {
+               die "cluster dir '$cluster_dir' not present and can't be created\n";
+       }
+
+       my $dirname = "$backup_dir/$cluster/$database";
+       if (-d $dirname) {
+               rmtree($dirname);
+       }
+
+       my $srcdir= "$dstdir/$database";
+       rename($srcdir, $dirname) or die "Rename '$srcdir'->'$dirname' failed: $!\n";
+
+       rmdir($dstdir) or warn $!;
+}
+
+sub backup_cluster {
+       my ($cluster) = @_;
+
+       # get db connection info
+       my $user = $c->get($cluster, 'user') || $c->get('client', 'user');
+       my $password = $c->get($cluster, 'password') || $c->get('client', 'password');
+       my $socket = $c->get($cluster, 'socket') || $c->get('client', 'socket');
+
+       # get databases to backup
+       my @dbs;
+
+       my @include = $c->get($cluster, 'include_databases');
+       my @exclude = $c->get($cluster, 'exclude_databases');
+       if (@exclude or !@include) {
+               my $dbh = new DB($user, $password, $socket);
+               my $sth = $dbh->prepare("show databases");
+               $sth->execute();
+               while (my($dbname) = $sth->fetchrow_array) {
+                       next if lc($dbname) eq 'information_schema';
+                       push @dbs, $dbname unless grep { m{^\Q$dbname\E$} } @exclude;
+               }
+               undef $dbh;
+       }
+
+       # now do the backup
+       foreach my $db (@dbs) {
+               mysqlhotcopy($cluster, $db, $user, $password, $socket);
+       }
+}
+
+package DB;
+
+# DB class for simple Database connection
+sub new {
+       my $self = shift;
+       my $class = ref($self) || $self;
+
+       my ($user, $password, $socket) = @_;
+       my $dsn = '';
+       $dsn .= "mysql_socket=$socket" if $socket;
+       my $dbh = DBI->connect("DBI:mysql:$dsn", $user, $password, { PrintError => 0, RaiseError => 1 });
+       return $dbh;
+}