{
    "summary": [
        {
            "name": "clusters",
            "title": "集群定义",
            "primary": ["id"],
            "catelog": "entity"
        }
    ],
    "fields": [
        {"name": "id", "title": "集群ID", "type": "str", "length": 32, "nullable": "no"},
        {"name": "name", "title": "集群名称", "type": "str", "length": 128, "nullable": "no"},
        {"name": "description", "title": "集群描述", "type": "str", "length": 512},
        {"name": "master_node_id", "title": "主机节点", "type": "str", "length": 32},
        {"name": "standby_node_id", "title": "备机节点", "type": "str", "length": 32},
        {"name": "check_interval", "title": "检测间隔(秒)", "type": "int", "nullable": "no", "default": "10"},
        {"name": "failover_threshold", "title": "故障判定阈值(次)", "type": "int", "nullable": "no", "default": "3"},
        {"name": "status", "title": "集群状态", "type": "str", "length": 32, "nullable": "no", "default": "stopped"},
        {"name": "created_at", "title": "创建时间", "type": "datetime"},
        {"name": "updated_at", "title": "更新时间", "type": "datetime"}
    ],
    "indexes": [
        {"name": "idx_clusters_name", "idxtype": "unique", "idxfields": ["name"]}
    ],
    "codes": [
        {"field": "status", "table": "appcodes_kv", "valuefield": "k", "textfield": "v", "cond": "parentid='cluster_status'"},
        {"field": "master_node_id", "table": "nodes", "valuefield": "id", "textfield": "host"},
        {"field": "standby_node_id", "table": "nodes", "valuefield": "id", "textfield": "host"}
    ]
}