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Experimenting with additional field for JSON filter

To: "openstack@xxxxxxxxxxxxxxxxxxx" <openstack@xxxxxxxxxxxxxxxxxxx>
From: Heng Xu <shouhengzhang.xu@xxxxxxxxxxxxxxxx>
Date: Mon, 13 Aug 2012 17:14:22 +0000
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Thread-index: Ac15dxTzvKGz9peNSVmS9l9zpveOng==
Thread-topic: Experimenting with additional field for JSON filter

Hello my friends,

I was trying to experiment with some of the scheduler’s functionality, as a mock-up, I was trying to augment the JSON filter’s functionality, JSON filter can filter anything in HostState class’s member fields, and I was trying to get the ID of a compute node, as in the compute_nodes table in the database, I added

self.currentid = 0

in __init__ method in HostState class, and added

databaseid = compute[‘id’]
self.currentid = databaseid

in update_from_compute_node method in HostState class, then in the hope that I can specify an id when pass a hint to JSON filter

nova boot –image 827d564a-e636-4fc4-a376-d36f7ebe1747 –flavor 1 –hint query=’[“=”,”$currentid”,1]’ server1

however, it always gives me an error on scheduling, I guess the scheduler could not find a compute node with id 1, but I just could not figure out, what is missing. Any thought and help is greatly appreciated.
Thanks
Heng