placement-multi-region-async.json

{
    "version": 1,
    "replicas": [
        {
            "count": 2,
            "constraints": {
                "rack": "west"
            }
        }
    ],
    "observers": [
        {
        "count": 2,
            "constraints": {
                "rack": "east"
            }
        }
    ]
}