On Tue, Jun 22, 2021 at 02:36:00PM +0200, Ml Ml wrote:
Hello List,
oversudden i can not mount a specific rbd device anymore:
root@proxmox-backup:~# rbd map backup-proxmox/cluster5 -k /etc/ceph/ceph.client.admin.keyring /dev/rbd0
root@proxmox-backup:~# mount /dev/rbd0 /mnt/backup-cluster5/ (just never times out)
Hi, there used to be some kernel lock issues when the kernel rbd client tried to access an OSD on the same machine. Not sure if these issues still exist (but I would guess so) and if you use your proxmox cluster in a hyperconverged manner (nodes providing VMs and storage service at the same time) you may just have been lucky that it had worked before. Instead of the kernel client mount you can try to export the volume as an NBD device (https://docs.ceph.com/en/latest/man/8/rbd-nbd/) and mounting that. rbd-nbd runs in userspace and should not have that locking problem. Matthias