[pmg-devel] [RFC pmg-api 02/12] Backup: split backup creation and creating tar

[Stoiko Ivanov <s.ivanov@proxmox.com>]

In preparation for integrating PMG with PBS split the current creation of
a PMG backup into 2 methods:
* create all files in a backup in a target directory
* create a tarball from a backup in a temporary directory

use the changed method in the backup API call.

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
---
 src/PMG/API2/Backup.pm |  2 +-
 src/PMG/Backup.pm      | 41 ++++++++++++++++++++++++++++++++---------
 2 files changed, 33 insertions(+), 10 deletions(-)

diff --git a/src/PMG/API2/Backup.pm b/src/PMG/API2/Backup.pm
index 0bfcfc9..08c06b5 100644
--- a/src/PMG/API2/Backup.pm
+++ b/src/PMG/API2/Backup.pm
@@ -131,7 +131,7 @@ __PACKAGE__->register_method ({
 
 	    print "starting backup to: $filename\n";
 
-	    PMG::Backup::pmg_backup($filename, $param->{statistic});
+	    PMG::Backup::pmg_backup_pack($filename, $param->{statistic});
 
 	    print "backup finished\n";
 
diff --git a/src/PMG/Backup.pm b/src/PMG/Backup.pm
index 025bac2..3854a5d 100644
--- a/src/PMG/Backup.pm
+++ b/src/PMG/Backup.pm
@@ -133,10 +133,11 @@ sub dumpstatdb {
 }
 
 sub pmg_backup {
-    my ($filename, $include_statistics) = @_;
+    my ($backupdir, $include_statistics) = @_;
+
 
     my $time = time;
-    my $dirname = "/tmp/proxbackup_$$.$time";
+    my $dirname = $backupdir // '/var/lib/pmg/backup/current';
     my $dbfn = "Proxmox_ruledb.sql";
     my $statfn = "Proxmox_statdb.sql";
     my $tarfn = "config_backup.tar";
@@ -145,12 +146,7 @@ sub pmg_backup {
 
     eval {
 
-	my $targetdir = dirname($filename);
-	mkdir $targetdir; # try to create target dir
-	-d $targetdir ||
-	    die "unable to access target directory '$targetdir'\n";
-
-	# create a temporary directory
+	# create backup directory
 	mkdir $dirname;
 
 	# dump the database first
@@ -197,7 +193,34 @@ sub pmg_backup {
 	system("cd $dirname; md5sum $tarfn $dbfn $extradb $verfn> $sigfn") == 0 ||
 	    die "unable to create backup signature: ERROR";
 
-	system("rm -f $filename; tar czf $filename -C $dirname $verfn $sigfn $dbfn $extradb $tarfn") == 0 ||
+    };
+    my $err = $@;
+
+    if ($err) {
+	die $err;
+    }
+}
+
+sub pmg_backup_pack {
+    my ($filename, $include_statistics) = @_;
+
+    my $time = time;
+    my $dirname = "/tmp/proxbackup_$$.$time";
+
+    eval {
+
+	my $targetdir = dirname($filename);
+	mkdir $targetdir; # try to create target dir
+	-d $targetdir ||
+	    die "unable to access target directory '$targetdir'\n";
+
+	rmtree $dirname;
+	# create backup directory
+	mkdir $dirname;
+
+	pmg_backup($dirname, $include_statistics);
+
+	system("rm -f $filename; tar czf $filename --strip-components=1 -C $dirname .") == 0 ||
 	    die "unable to create backup archive: ERROR";
     };
     my $err = $@;
-- 
2.20.1