Database Manual / Reference / mongosh Methods / Databases

db.hello() (mongosh method方法)

db.hello()

New in version 5.0.在版本5.0中新增。

Returns a document that describes the role of the mongod instance.返回一个描述mongod实例角色的文档。

If the mongod is a member of a replica set, then the isWritablePrimary and secondary fields report if the instance is the primary or if it is a secondary member of the replica set.如果mongod是副本集的成员，那么isWritablePrimary和secondary字段会报告该实例是副本集中的primary还是secondary成员。

Tip

See: 请参阅：

hello for the complete documentation of the output of db.hello().获取db.hello()输出的完整文档。

Compatibility兼容性

This method is available in deployments hosted in the following environments:此方法在以下环境中托管的部署中可用：

  • MongoDB Atlas: The fully managed service for MongoDB deployments in the cloud：云中MongoDB部署的完全托管服务

Note

This command is supported in all MongoDB Atlas clusters. 所有MongoDB Atlas集群都支持此命令。For information on Atlas support for all commands, see Unsupported Commands.有关Atlas支持所有命令的信息，请参阅不支持的命令。

  • MongoDB Enterprise: The subscription-based, self-managed version of MongoDB：MongoDB的基于订阅的自我管理版本
  • MongoDB Community: The source-available, free-to-use, and self-managed version of MongoDB：MongoDB的源代码可用、免费使用和自我管理版本