Open Stack

I found a fun little legacy nugget of compute API non-interoperability 
joy tonight.

The "allow_instance_snapshots" config option disables the createImage 
server action API. Completely config driven and therefore not discoverable.

What intrigues me is that this isn't applied to the createBackup or 
shelve APIs, which also create a snapshot of the instance. Is this by 
design? I'm guessing probably not. In fact, this predates the use of 
Gerrit [1] so this was probably just something hacked in so long ago it 
makes zero sense now. The way to disable any of these APIs now is via 
policy.

Unless anyone has an issue with this, I'm going to deprecate it for removal.

[1] 
https://github.com/openstack/nova/commit/9633e9877c7836c18c30b51c8494abfb025e64ca

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Thanks,

Matt