{ "$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. } } } } } }