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Don't rely on device name provided by Cinder
See issue kubernetes#33128 We can't rely on the device name provided by Cinder, and thus must perform detection based on the drive serial number (aka It's cinder ID) on the kubelet itself. This patch re-works the cinder volume attacher to ignore the supplied deviceName, and instead defer to the pre-existing GetDevicePath method to discover the device path based on it's serial number and /dev/disk/by-id mapping. This new behavior is controller by a config option, as falling back to the cinder value when we can't discover a device would risk devices not showing up, falling back to cinder's guess, and detecting the wrong disk as attached.
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