Dear all,
I installed QEMU, libvirtd and its RBD plugins and now trying
to make QEMU use my Ceph storage. I created 'iso' pool
and imported Windows installation image there (rbd import).
Also I created 'libvirt' pool and there, created 2.7-TB image
for Windows installation. I created client.iso and
client.libvirt accounts for Ceph authentication,
and configured their secrets for pool access in virsh
(as told in http://docs.ceph.com/docs/master/rbd/libvirt/ ).
Then I started pools and checked that I can list their contents
from virsh. Then I created a VM with dummy HDD and optical
drive, and edited them using 'virsh edit' :
<disk type='network' device='disk'>
<driver name='qemu'/>
<auth username='libvirt'>
<secret type='ceph' uuid='ac1d8d7b-d243-4474-841d-91c26fd93a14'/>
</auth>
<source protocol='rbd' name='libvirt/win206-test-3tb'>
<host name='192.168.200.230' port='6789'/>
</source>
<target dev='sda' bus='sata'/>
<boot order='2'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='network' device='cdrom'>
<driver name='qemu'/>
<auth username='iso'>
<secret type='ceph' uuid='cf00c7e4-740a-4935-9d7c-223d3c81871f'/>
</auth>
<source protocol='rbd'
name='iso/SW_DVD9_Win_Server_STD_CORE_2016_64Bit_Russian_-4_DC_STD_MLF_X21-70539.ISO'>
<host name='192.168.200.230' port='6789'/>
</source>
<target dev='sdb' bus='sata'/>
<readonly/>
<boot order='1'/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
Now I see this in the systemd journalctl :
чер 06 16:24:12 p10s qemu-system-x86_64[4907]: 2018-06-06 16:24:12.147
7f40f37fe700 -1 librbd::io::ObjectRequest: 0x7f40d4010500
handle_read_object: failed to read from object: (1) Operation not permitted
What should I check and where ?
I can map the same RBD using rbd-nbd and read sectors
from the mapped device. If I map using kernel RBD driver
(I know this is not recommended to do on the same host),
I get :
чер 06 16:27:54 p10s kernel: rbd: image
SW_DVD9_Win_Server_STD_CORE_2016_64Bit_Russian_-4_DC_STD_MLF_X21-70539.ISO:
image uses unsupported features: 0x38
and
RBD image feature set mismatch. You can disable features unsupported by
the kernel with "rbd feature disable
iso/SW_DVD9_Win_Server_STD_CORE_2016_64Bit_Russian_-4_DC_STD_MLF_X21-70539.ISO
object-map fast-diff deep-flatten".
Probably I need to change some attributes for the RBD
to be usable with QEMU. Please give some hints.
Thank you in advance.
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