[Openstack] Metadata and File Injection

Jay Pipes jaypipes at gmail.com
Wed Dec 14 17:28:52 UTC 2011

On Wed, Dec 14, 2011 at 9:04 AM, McNally, Dave <dave.mcnally at hp.com> wrote:
> Hi,
> I've recently been looking at file and metadata injection in Nova and I have
> a question relating to it.
> (BTW this is based off what I have seen in nova/virt/disk.py)
> I notice that for key/value pairs specified as metadata during boot of an
> instance these values are injected into a file /meta.js in the instance.
> However if a file (and corresponding injection location) are specified when
> booting the instance the file does not get injected.

Not on libvirt/KVM. It works on Xen, though:


> I was wondering if there was an intentional decision not to use a similar
> method to that used when injecting meta.js to inject other files? Because it
> seems to me the addition of such functionality would be fairly
> straightforward.

I'm interested in the answer to this question as well...

> Also on a vaguely related note why is the metadata injected into a file
> rather than stored in a location where it can be retrieved from the metadata
> service?

No idea. :(


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