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错误：[/backcolor] 实例 "m5" 执行所请求操作失败，实例处于错误状态。: 请稍后再试 [错误: Build of instance 24140772-ebf8-414f-9ebd-734c5dd10e2e aborted: Volume ab51e239-b0f3-4ada-9074-6fa3c6eb9b77 did not finish being created even after we waited 3 seconds or 2 attempts. And its status is error.].
解决办法：
# vim /var/lib/config-data/nova_libvirt/etc/nova/nova.conf
Find the following two parameters and increase them:
Raw
block_device_allocate_retries=120
block_device_allocate_retries_interval=6
这里发现并不是我们nova的配置有问题，而是cinder-volume设备上值设置有问题
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