ceph with luminous can't be used with KRBD with Xenial 4.4 kernel
Bug #1716735 reported by
Chris MacNaughton
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Ceph Monitor Charm |
Triaged
|
Medium
|
Unassigned | ||
| OpenStack Ceph Charm (Retired) |
Won't Fix
|
Medium
|
Unassigned | ||
Bug Description
The message protocol in Luminous is too new for the Xenial version of the kernel, leading to
feature set mismatch, my 106b84a842a42 < server's 40106b84a842a42, missing 400000000000000
when trying to mount a RBD device. It is possible to fix this in a running ceph cluster by running
`ceph osd crush tunables legacy`
on a monitor node
| tags: | added: arm64 uosci |
| Changed in charm-ceph: | |
| importance: | Undecided → Medium |
| Changed in charm-ceph-mon: | |
| importance: | Undecided → Medium |
| Changed in charm-ceph: | |
| status: | New → Triaged |
| Changed in charm-ceph-mon: | |
| status: | New → Triaged |
Revision history for this message
| James Page (james-page) wrote | #1 |
| summary: |
- ceph with luminous can't be used with KRBD + ceph with luminous can't be used with KRBD with Xenial 4.4 kernel |
Revision history for this message
| Billy Olsen (billy-olsen) wrote | #2 |
| Changed in charm-ceph: | |
| status: | Triaged → Won't Fix |
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Note that if newer HWE kernels are in use, this workaround is not required as the tunables for Jewel are supported from 4.5 onwards - so this only impacts the release 4.4 kernels.
For 4.4, use:
sudo ceph osd crush tunables hammer
as legacy reverts right back to argonaut