On Tue, Sep 17, 2019 at 8:54 AM 潘东元 <dongyuanpan0@xxxxxxxxx> wrote:
>
> Thank you for your reply.
> so,i would like to verify this problem. i create a new VM as a
> client,it is kernel version:
> [root@localhost ~]# uname -a
> Linux localhost.localdomain 5.2.9-200.fc30.x86_64 #1 SMP Fri Aug 16
> 21:37:45 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
>
> First of all,use command:ceph features in my cluster
> [root@node-1 ~]# ceph features
> {
> "mon": {
> "group": {
> "features": "0x3ffddff8eeacfffb",
> "release": "luminous",
> "num": 3
> }
> },
> "osd": {
> "group": {
> "features": "0x3ffddff8eeacfffb",
> "release": "luminous",
> "num": 12
> }
> },
> "client": {
> "group": {
> "features": "0x3ffddff8eeacfffb",
> "release": "luminous",
> "num": 7
> }
> }
> }
>
> now, i have no jewel client.And then,i map a rbd image to new VM
> [root@localhost ~]# rbd map test
> /dev/rbd0
> map successful!
> new,use ceph features
> [root@node-1 ~]# ceph features
> {
> "mon": {
> "group": {
> "features": "0x3ffddff8eeacfffb",
> "release": "luminous",
> "num": 3
> }
> },
> "osd": {
> "group": {
> "features": "0x3ffddff8eeacfffb",
> "release": "luminous",
> "num": 12
> }
> },
> "client": {
> "group": {
> "features": "0x27018fb86aa42ada",
> "release": "jewel",
> "num": 1
> },
> "group": {
> "features": "0x3ffddff8eeacfffb",
> "release": "luminous",
> "num": 7
> }
> }
> }
> I have a jewel client.It is not an expectation.
> why? is it means i still can not use upmap feature?
You can. The kernel client reports itself as jewel due to a technical
issue, fixed in kernel 5.3. All luminous features are fully supported,
all you need to do is "ceph osd set-require-min-compat-client luminous"
to allow them to be used.
Note that if you actually enable upmap, it will prevent older clients
from connecting, so you will no longer be able to use pre-luminous and
pre-4.13 (RHEL/CentOS 7.5) kernels.
Thanks,
Ilya
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