Native Ceph RBD SM driver for XCP-ng

psafont

@benapetr You're right. Unfortunately, there's no VDI revert that allows the revert to happen '. This is shown in the documentation: https://xapi-project.github.io/new-docs/toolstack/features/snapshots/index.html (see revert section)

There's an old proposal to do add this: https://xapi-project.github.io/new-docs/design/snapshot-revert/index.html

But the effort fizzed out because currently the imports do not set the snapshot_of correctly, and the operation needs to work even if the field is not set correctly, as it is now. (falling back to the current code seems sensible) https://github.com/xapi-project/xen-api/pull/2058

This needs some effort to get fixed, I'll set up some ticketing so it can be prioritized accordingly.

Maelstrom96

This post is deleted!

olivierlambert

The author of the main recent effort is basically the person who posted just before you

Maelstrom96

@olivierlambert you basically replied just after that I noticed that and deleted my message...

JamesG

Nothing fruitful to add....

But...

Oooof....

This will be somewhat messy to clean up. I'm rooting for you guys though!!

olivierlambert

There's some nice progress on @psafont's work regarding improved revert. I'm confident we'll get there

henri9813

Hello,

Thanks for your work !

We have some hypervisors of tests at Gladhost, we can use them with pleasure to test your work on xcp-ng 8.3 !

Best regards

Maelstrom96

@benapetr Good news, seems like the latest version for SM will implement vdi_revert which should work nicely with Ceph RBD. The only thing now is to have the newer Ceph kernel drivers in XCP-ng since the current driver is very old... (v12 I believe, we're now at v20, soon v22)

henri9813

Hello @Maelstrom96.

This should be possible in the future version of XCP-NG built on top of alma 9

olivierlambert

It's more like "partially"/loosely based on Alma (10, not 9). And yes, the kernel will be far more recent, same for Xen and so on.