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模块命令行说明：

gs_dbmind component cluster_diagnosis --help

显示如下帮助信息：

usage: [-h] --conf CONF --host HOST --role {cn,dn} [--time TIME] [--method {logical,tree}]
Cluster diagnosis.
optional arguments:
  -h, --help            show this help message and exit
  --conf CONF           set the directory of configuration files
  --host HOST           set the host of the cluster node, ip only.
  --role {cn,dn}        set the role of instance for diagnosis. roles: [cn]
                        are not supported for centralized DB.
  --time TIME           set time for diagnosis in timestamp(ms) or datetime format
  --method {logical,tree}
                        set method for the model: logical: if-else, tree: xgboost.