红帽全球峰会6.2. 临时解决方案
如前文所述，您需要在指定镜像支持的卷的大小时考虑镜像报告的卷大小与块存储服务之间的差异。这意味着，在指定镜像支持的卷的大小时，请在 glance 报告的镜像大小后使用下一个整数。
使用前面的例子，glance 会报告镜像大小为 1.01GB。这意味着，当您创建卷时，您需要指定大小为 2GB 的卷大小，而不是 1GB：
# cinder create --display-name vol2 --image-id c65f7eae-e2c1-44ba-8af1-e33695897559 2
+---------------------+--------------------------------------+
| Property | Value |
+---------------------+--------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| created_at | 2014-12-19T04:54:07.036260 |
| display_description | None |
| display_name | vol2 |
| encrypted | False |
| id | fcf49715-094d-4bba-9f05-8b7fa6deffce |
| image_id | c65f7eae-e2c1-44ba-8af1-e33695897559 |
| metadata | {} |
| size | 2 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| volume_type | None |
+---------------------+--------------------------------------+
+---------------------+--------------------------------------+
| Property | Value |
+---------------------+--------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| created_at | 2014-12-19T04:54:07.036260 |
| display_description | None |
| display_name | vol2 |
| encrypted | False |
| id | fcf49715-094d-4bba-9f05-8b7fa6deffce |
| image_id | c65f7eae-e2c1-44ba-8af1-e33695897559 |
| metadata | {} |
| size | 2 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| volume_type | None |
+---------------------+--------------------------------------+
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