[openstack-dev] [nova] Device tagging: rebuild config drive upon instance reboot to refresh metadata on it

Tim Bell Tim.Bell at cern.ch
Mon Feb 20 17:07:53 UTC 2017

Is there cloud-init support for this mode or do we still need to mount as a config drive?


On 20.02.17, 17:50, "Jeremy Stanley" <fungi at yuggoth.org> wrote:

    On 2017-02-20 15:46:43 +0000 (+0000), Daniel P. Berrange wrote:
    > The data is exposed either as a block device or as a character device
    > in Linux - which one depends on how the NVDIMM is configured. Once
    > opening the right device you can simply mmap() the FD and read the
    > data. So exposing it as a file under sysfs doesn't really buy you
    > anything better.
    Oh! Fair enough, if you can already access it as a character device
    then I agree that solves the use cases I was considering.
    Jeremy Stanley
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