{
    "summary": [
        {
            "name": "nodes",
            "title": "节点管理",
            "primary": ["id"],
            "catelog": "entity"
        }
    ],
    "fields": [
        {"name": "id", "title": "节点ID", "type": "str", "length": 32, "nullable": "no"},
        {"name": "host", "title": "主机地址", "type": "str", "length": 255, "nullable": "no"},
        {"name": "name", "title": "节点名称", "type": "str", "length": 128},
        {"name": "ip", "title": "IP地址", "type": "str", "length": 64},
        {"name": "ssh_port", "title": "SSH端口", "type": "int", "nullable": "no", "default": "22"},
        {"name": "ssh_user", "title": "SSH用户", "type": "str", "length": 64, "default": "root"},
        {"name": "role", "title": "角色", "type": "str", "length": 16},
        {"name": "status", "title": "在线状态", "type": "str", "length": 16, "nullable": "no", "default": "offline"},
        {"name": "agent_version", "title": "Agent版本", "type": "str", "length": 32},
        {"name": "last_heartbeat", "title": "最后心跳", "type": "datetime"},
        {"name": "created_at", "title": "创建时间", "type": "datetime"},
        {"name": "updated_at", "title": "更新时间", "type": "datetime"}
    ],
    "indexes": [
        {"name": "idx_nodes_host", "idxtype": "unique", "idxfields": ["host"]}
    ],
    "codes": [
        {"field": "role", "table": "appcodes_kv", "valuefield": "k", "textfield": "v", "cond": "parentid='node_role'"},
        {"field": "status", "table": "appcodes_kv", "valuefield": "k", "textfield": "v", "cond": "parentid='node_status'"}
    ]
}