Hi,

I don't have much to contribute, but according to the source code [1] this seems to be a non-fatal message:
void CreatePrimaryRequest<I>::handle_unlink_peer(int r) {
  CephContext *cct = m_image_ctx->cct;
  ldout(cct, 15) << "r=" << r << dendl;

  if (r < 0) {
    lderr(cct) << "failed to unlink peer: " << cpp_strerror(r) << dendl;
    finish(0); // not fatal
    return;
  }

I guess if you increased debug level to 15, you might see where exactly that message comes from. But I don't know how to get rid of them, so maybe one of the devs can comment on that.
Regards,
Eugen

[1] https://github.com/ceph/ceph/blob/v17.2.7/src/librbd/mirror/snapshot/CreatePrimaryRequest.cc#L260
Zitat von Scott Cairns <scott.cai...@tecnica-ltd.co.uk>:

Hi,

Following the introduction of an additional node to our Ceph cluster, we've started to see unlink errors when taking a rbd mirror snapshot.
We've had RBD mirroring configured for over a year now and it's been  
working flawlessly, however after we created OSD's on a new node  
we've receiving the following error:
librbd::mirror::snapshot::CreatePrimaryRequest: 0x7f60c80056f0  
handle_unlink_peer: failed to unlink peer: (2) No such file or  
directory
This seemed to appear on around 3 of 150 snapshots on the first  
night and over the weeks has progressed to almost every snapshot.
What's odd, is that the snapshot appears to be taken without any  
issues and does mirror to the DR site - we can see the snapshot ID  
taken on the source side is mirrored to the destination side when  
checking the rbd snap ls, and we've tested promoting an image on the  
DR site to ensure the snapshot does include up to date data, which  
it does.
I can't see any other errors generated when the snapshot is taken to  
identify what file/directory isn't found - everything appears to be  
working okay it's just generating an error during the snapshot.

I've also tried disabling mirroring on the disk and re-enabling however it doesn't appear to make any difference - there's no error on the initial mirror image, or the first snapshot taken after that, but every subsequent snapshot shows the error again.
Any ideas?

Thanks,
Scott

________________________________

The content of this e-mail and any attachment is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of Tecnica Limited.
If you have received this e-mail in error please notify the sender.
Any use, dissemination, forwarding, printing, or copying of this e-mail or any attachments thereto, in whole or part, without permission is strictly prohibited.
Tecnica Limited Registered office: 5 Castle Court, Carnegie Campus,  
Dunfermline, Fife, KY11 8PB.
Registered in Scotland No. SC250307.
VAT No. 827 5110 42.

This footnote also confirms that this email message has been swept for the presence of computer viruses.
_______________________________________________
ceph-users mailing list -- ceph-users@ceph.io
To unsubscribe send an email to ceph-users-le...@ceph.io

_______________________________________________
ceph-users mailing list -- ceph-users@ceph.io
To unsubscribe send an email to ceph-users-le...@ceph.io

Reply via email to