bootstrap-vz/bootstrapvz/plugins/docker_daemon/manifest-schema.json

{
	"$schema": "http://json-schema.org/draft-04/schema#",
	"title": "Install Docker plugin manifest",
	"type": "object",
	"properties": {
		"system": {
			"type": "object",
			"properties": {
				"architecture": {
					"type": "string",
					"enum": ["amd64"]
					// Docker runs on x86_64 only
				},
				"release": {
					"not": {
						"type": "string",
						"enum": ["squeeze", "oldstable"]
						// Docker needs at least wheezy + backports.
					}
				}
			}
		}
	}
}