I tested exporting a volume from an iSCSI storage.
First I installed Debian in a VM on a LUN and then exported the volume:
```
$ pvesm export tgtstorage:0.0.1.scsi-360000000000000000e00000000010001
raw+size output
3915055104 bytes (3.9 GB, 3.6 GiB) copied, 11 s, 356 MB/s
65472+0 records in
65472+0 records out
4290772992 bytes (4.3 GB, 4.0 GiB) copied, 12.0677 s, 356 MB/s
```
Then I imported the volume into a directory storage:
```
$ pvesm import local:117/vm-117-disk-0.raw raw+size output
```
Assigned the disk to a VM and it booted up just fine.
Trying to import into an iSCSI storage fails as expected:
```
$ pvesm import tgtstorage raw+size output
cannot import into volume 'tgtstorage'
```
Tested-by: Filip Schauer <f.scha...@proxmox.com>
On 17/12/2024 16:48, Fiona Ebner wrote:
Signed-off-by: Fiona Ebner <f.eb...@proxmox.com>
---
New in v2.
src/PVE/Storage/ISCSIPlugin.pm | 48 ++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/src/PVE/Storage/ISCSIPlugin.pm b/src/PVE/Storage/ISCSIPlugin.pm
index 6de7610..eb70453 100644
--- a/src/PVE/Storage/ISCSIPlugin.pm
+++ b/src/PVE/Storage/ISCSIPlugin.pm
@@ -596,5 +596,53 @@ sub volume_has_feature {
return undef;
}
+sub volume_export_formats {
+ my ($class, $scfg, $storeid, $volname, $snapshot, $base_snapshot,
$with_snapshots) = @_;
+
+ return () if defined($snapshot); # not supported
+ return () if defined($base_snapshot); # not supported
+ return () if $with_snapshots; # not supported
+ return ('raw+size');
+}
+
+sub volume_export {
+ my (
+ $class,
+ $scfg,
+ $storeid,
+ $fh,
+ $volname,
+ $format,
+ $snapshot,
+ $base_snapshot,
+ $with_snapshots,
+ ) = @_;
+
+ die "volume export format $format not available for $class\n" if $format
ne 'raw+size';
+ die "cannot export volumes together with their snapshots in $class\n" if
$with_snapshots;
+ die "cannot export an incremental stream in $class\n" if
defined($base_snapshot);
+ die "cannot export a snapshot in $class\n" if defined($snapshot);
+
+ my $file = $class->filesystem_path($scfg, $volname, $snapshot);
+ my $size;
+ run_command(['/sbin/blockdev', '--getsize64', $file], outfunc => sub {
+ my ($line) = @_;
+ die "unexpected output from /sbin/blockdev: $line\n" if $line !~
/^(\d+)$/;
+ $size = int($1);
+ });
+ PVE::Storage::Plugin::write_common_header($fh, $size);
+ run_command(['dd', "if=$file", "bs=64k", "status=progress"], output =>
'>&'.fileno($fh));
+ return;
+}
+
+sub volume_import_formats {
+ my ($class, $scfg, $storeid, $volname, $snapshot, $base_snapshot,
$with_snapshots) = @_;
+
+ return ();
+}
+
+sub volume_import {
+ die "volume import is not possible on iscsi storage\n";
+}
1;
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