[openstack-dev] [nova] Device tagging: rebuild config drive upon instance reboot to refresh metadata on it
Joshua Harlow
harlowja at fastmail.com
Mon Feb 27 17:20:58 UTC 2017
Not afaik, first time I've heard about this type of device/data.
Tim Bell wrote:
> Is there cloud-init support for this mode or do we still need to mount as a config drive?
>
> Tim
>
> 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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