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rbd: do not try to run resizefs on an encrypted BlockMode volume

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When a volume has AccessType=Block and is encrypted with LUKS, a resize
of the filesystem on the (decrypted) block-device is attempted. This
should not be done, as the application that requested the Block volume
is the only authoritive reader/writer of the data.

In particular VirtualMachines that use RBD volumes as a disk, usually
have a partition table on the disk, instead of only a single filesystem.
The `resizefs` command will not be able to resize the filesystem on the
block-device, as it is a partition table.

When `resizefs` fails during NodeStageVolume, the volume is unstaged and
an error is returned.

Resizing an encrypted block-device requires `cryptsetup resize` so that
the LUKS header on the RBD-image is updated with the correct size. But
there is no need to call `resizefs` in this case.

Fixes: #3945
Signed-off-by: Niels de Vos <ndevos@ibm.com>
This commit is contained in:
Niels de Vos 2023-06-30 09:22:09 +02:00 committed by mergify[bot]
parent 0efe8e4711
commit f60a358007
1 changed files with 8 additions and 0 deletions
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8
internal/rbd/nodeserver.go
View File

@ -512,6 +512,14 @@ func resizeNodeStagePath(ctx context.Context,
if err != nil {
return status.Error(codes.Internal, err.Error())
}
// If this is a AccessType=Block volume, do not attempt
// filesystem resize. The application is in charge of the data
// on top of the raw block-device, we can not assume there is a
// filesystem at all.
if isBlock {
return nil
}
}
// check stagingPath needs resize.
ok, err = resizer.NeedResize(devicePath, stagingTargetPath)