Advanced features for RBD and intercluster replication

[gagipro]

Yes I already tried setting up intercluster replication, it do work at Ceph level, not Rook level

Is this a bug report or feature request?

• Feature Request

What should the feature do:
Allow advanced RBD features which are prereq for intercluster pool replication
begin to test as kernel 5.4 with object-map and fast-diff supports now prereq for Ceph

What is use case behind this feature:
allow disaster recovery when cluster loss

Environment:

[travisn]

@gagipro Are you referring to rbd mirroring? Today Rook will start the rbd mirroring daemons with this setting, then you need to configure the pools and images for replication in the toolbox. Some are already using this in their clusters and it is a work item to provide a more complete solution in Rook. Can you provide more details for what you tried in Rook so we can troubleshoot what didn't work?

[gagipro]

@gagipro Are you referring to rbd mirroring? Today Rook will start the rbd mirroring daemons with this setting, then you need to configure the pools and images for replication in the toolbox. Some are already using this in their clusters and it is a work item to provide a more complete solution in Rook. Can you provide more details for what you tried in Rook so we can troubleshoot what didn't work?

Hi,

Yes RBD mirroring, it doesn't seem possible to setup other features than layering one at Rook level.

it seems exclusive-lock and journaling are prereq for rbd mirroring, you can set this up manually at Ceph level but it doesn't seem supported by Rook at the moment if I'm not wrong. Should it be in the roadmap for 1.4?

Edit
When defining kind: StorageClass
provisioner: rook-ceph.rbd.csi.ceph.com
You cannot set parameters

# RBD image features. Available for imageFormat: "2". CSI RBD currently supports only `layering` feature.
imageFeatures: layering

So, I’m wondering if it is now possible to implement other features needed rbd mirroring like exclusive lock and journaling.

Thanks in advance for your help and clarification

[gagipro]

Perhaps have to wait 3.0 milestone of csi driver.

ceph/ceph-csi#676

ceph/ceph-csi#684

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in a week if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed due to inactivity. Please re-open if this still requires investigation.

[travisn]

We will be looking into this for 1.5