Skip to content

Fix KVM incremental volume snapshot creation #12666

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
JoaoJandre wants to merge 1 commit into
base: 4.22
Choose a base branch
from
+19 −2
Open

Fix KVM incremental volume snapshot creation #12666

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
21 changes: 19 additions & 2 deletions ...s/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/KVMStorageProcessor.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2093,8 +2093,25 @@ protected void rebaseSnapshot(SnapshotObjectTO snapshotObjectTO, KVMStoragePool
QemuImg qemuImg = new QemuImg(wait);
qemuImg.rebase(snapshotFile, parentSnapshotFile, PhysicalDiskFormat.QCOW2.toString(), false);
} catch (LibvirtException | QemuImgException e) {
logger.error("Exception while rebasing incremental snapshot [{}] due to: [{}].", snapshotName, e.getMessage(), e);
throw new CloudRuntimeException(e);
if (!StringUtils.contains(e.getMessage(), "Is another process using the image")) {
Copy link
Contributor

@sureshanaparti sureshanaparti Feb 19, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@JoaoJandre is this string case sensitive? can you paste the sample error message here. thanks.

Copy link
Contributor Author

@JoaoJandre JoaoJandre Feb 19, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@sureshanaparti :

qemu-img: Could not open '<path>': Failed to get "write" lockIs another process using the image [<path>]?].

logger.error("Exception while rebasing incremental snapshot [{}] due to: [{}].", snapshotName, e.getMessage(), e);
throw new CloudRuntimeException(e);
}
retryRebase(snapshotName, wait, e, snapshotFile, parentSnapshotFile);
}
}

private void retryRebase(String snapshotName, int wait, Exception e, QemuImgFile snapshotFile, QemuImgFile parentSnapshotFile) {
logger.warn("Libvirt still has not released the lock, will wait 60 seconds and try again later.");
try {
Thread.sleep(60*1000);
Copy link
Contributor

@sureshanaparti sureshanaparti Feb 19, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

is it required to keep this wait time configurable?

QemuImg qemuImg = new QemuImg(wait);
qemuImg.rebase(snapshotFile, parentSnapshotFile, PhysicalDiskFormat.QCOW2.toString(), false);
} catch (LibvirtException | QemuImgException | InterruptedException ex) {
logger.error("Unable to rebase snapshot [{}].", snapshotName, ex);
CloudRuntimeException cre = new CloudRuntimeException(ex);
cre.addSuppressed(e);
throw cre;
}
}

Expand Down
Loading