{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "additionalItems": false,
    "description": "IP address/port for primary/backup server pair",
    "items": {
        "properties": {
            "address": {
                "type": "string"
            },
            "port": {
                "maximum": 65535,
                "minimum": 0,
                "type": "integer"
            }
        },
        "required": [
            "address",
            "port"
        ],
        "type": "object"
    },
    "maxItems": 2,
    "minItems": 2,
    "title": "Primary and Backup Servers",
    "type": "array",
    "_uniqueItems": true
}