[Bug 1828617] Re: Hosts randomly 'losing' disks, breaking ceph-osd service enumeration
Wouter van Bommel
1828617 at bugs.launchpad.net
Fri May 31 01:45:52 UTC 2019
Hi,
Added the udevadm settle --timeout=5 in both the 2 remaining if block's
in the referenced script. That did not make a difference.
See https://pastebin.ubuntu.com/p/8f2ZXMRNgv/ for the ceph-volume-
systemd.log
At this boot, the osd's with numbers 4, 11 & 18 did not start, with the
missing symlinks
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https://bugs.launchpad.net/bugs/1828617
Title:
Hosts randomly 'losing' disks, breaking ceph-osd service enumeration
Status in ceph package in Ubuntu:
New
Bug description:
Ubuntu 18.04.2 Ceph deployment.
Ceph OSD devices utilizing LVM volumes pointing to udev-based physical devices.
LVM module is supposed to create PVs from devices using the links in /dev/disk/by-dname/ folder that are created by udev.
However on reboot it happens (not always, rather like race condition) that Ceph services cannot start, and pvdisplay doesn't show any volumes created. The folder /dev/disk/by-dname/ however has all necessary device created by the end of boot process.
The behaviour can be fixed manually by running "#/sbin/lvm pvscan
--cache --activate ay /dev/nvme0n1" command for re-activating the LVM
components and then the services can be started.
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