Intermittent issues with Cinder block storage attaching.

asked 2014-11-17 11:47:47 -0500

Heather gravatar image

We are seeing intermittent issues where we allocate and attach cinder storage in HOT where it works fine sometimes and other times the storage does not show up.

We attach it to /dev/vdb. Most times it's there and works great. Occasionally, it does not. You do a df and it doesn't show. Do a soft reboot of the instance and it will then show up. We are doing steps serially to prevent race conditions and our chef recipe will loop for 2 minutes waiting for it to become available. We cannot re-create this at will. As I said, most of the time it works.

Is this a known issue?

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Hi Heather,

We had the same problem, just sometimes the storage doesn't show up. We did a rescan of the PCI bus to fix the problem. After that the disk show up again:

echo 1 > /sys/bus/pci/rescan
Daniel Isla gravatar imageDaniel Isla ( 2016-07-19 09:13:06 -0500 )edit