一、 cinder存储类型为lvm盘转换成ceph盘
1 转换前，需要将原来的虚拟机删掉，注意默认删除虚拟机是不会删除虚拟机对应的volume，用笔记本记得虚拟机所在的volume id或者name。
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# openstack volume list --long | grep 980c87ad-35e7-4a02-a67e-2606f3e39f2d
| 980c87ad-35e7-4a02-a67e-2606f3e39f2d | disk1005sg | in-use | 1 | None | true | Attached to vm1005sg on /dev/vda | |
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作者环境默认存储为lvm，显示为None。
删除虚拟机
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# openstack server delete vm1005sg
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2 使用volume:980c87ad-35e7-4a02-a67e-2606f3e39f2d创建image，采用qcow2。
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# openstack image create --container-format bare --disk-format qcow2 --volume 980c87ad-35e7-4a02-a67e-2606f3e39f2d disk-for-lvm-cirros
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查看image
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# openstack image list
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显示如下：
根据这个镜像创建类型为rbd-1的volume
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# openstack volume create --image disk-for-lvm-cirros --type rbd-1 --size 1 --bootable disk1108
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查看volume列表：
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# openstack volume list
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发觉出错了：
在查看log:
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# tailf /var/log/kolla/cinder/cinder-volume.log
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/taskflow/engines/action_engine/executor.py", line 53, in _execute_task
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server result = task.execute(**arguments)
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/cinder/volume/flows/manager/create_volume.py", line 1049, in execute
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server **volume_spec)
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/cinder/volume/flows/manager/create_volume.py", line 963, in _create_from_image
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server image_meta=image_meta)
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/cinder/volume/flows/manager/create_volume.py", line 444, in _handle_bootable_volume_glance_meta
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server raise exception.MetadataCopyFailure(reason=ex)
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server MetadataCopyFailure: Failed to copy metadata to volume: Glance metadata cannot be updated, key signature_verified exists for volume id 13e2f13a-fa3d-45d0-99f3-b582b7fb582e
2020-11-08 15:57:00.299 34 ERROR oslo_messaging.rpc.server
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注意黑体字的描述，其实就是因为磁盘格式问题，ceph不支持qcow2。
2 将image创建镜像及出错的盘删除
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# openstack image delete disk-for-lvm-cirros
# openstack volume delete disk1108
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重新使用volume:980c87ad-35e7-4a02-a67e-2606f3e39f2d创建image，采用raw。
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# openstack image create --container-format bare --disk-format raw --volume 980c87ad-35e7-4a02-a67e-2606f3e39f2d disk-for-lvm-cirros
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根据这个镜像创建类型为rbd-1的volume
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#openstack volume create --image disk-for-lvm-cirros --type rbd-1 --size 1 --bootable disk1108
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查看volume列表：
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# openstack volume list
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显示正常：
根据这个盘创建虚拟机:
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# openstack server create vm1108 --flavor nano.v1.128M.1G --volume disk1108 --network network1003
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等待一段时间，查看虚拟机显示正常：
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# openstack server list
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进入虚拟机：
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openstack console url show b9135ae9-4bd0-43fa-9489-f4debd05a4ca
+-------+-----------------------------------------------------------------------------------+
| Field | Value |
+-------+-----------------------------------------------------------------------------------+
| type | novnc |
| url | http://192.168.3.18:6080/vnc_auto.html?token=723af56f-80ef-462a-aa4b-6ade10259690 |
+-------+-----------------------------------------------------------------------------------+
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显示：