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 |
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