定义
rs.remove(hostname)从当前副本集中删除由
hostname参数描述的成员。此函数将短暂断开 Shell 连接，并在副本集重新协商哪个成员为主节点时强制重新连接。所以即使该命令成功执行，Shell 也会显示错误。The
rs.remove()method has the following parameter:Parameter类型说明hostname字符串
副本集中系统的主机名。
注意
Before running the
rs.remove()operation, it is good practice to shut down the replica set member that you are removing.
兼容性
此方法可用于以下环境中托管的部署：
MongoDB Enterprise：基于订阅、自我管理的 MongoDB 版本
MongoDB Community：源代码可用、免费使用且可自行管理的 MongoDB 版本
行为
全局写关注
Removing a member changes the number of voting members in the replica set, which can change the implicit default write concern.
You must explicitly set the global default write concern before attempting to reconfigure a replica set with a configuration that would change the implicit default write concern. To set the global default write concern, use the setDefaultRWConcern command.
等到大多数节点安装副本配置后才删除
rs.remove() runs the replSetReconfig command with a configuration that omits the removed member. The method waits until a majority of voting replica set members install the new replica configuration before it returns success. A voting member is any replica set member where members[n].votes is 1, including arbiters. To learn how replica set members install a new configuration, see Reconfiguration Waits Until a Majority of Members Install the Replica Configuration.
rs.remove() does not accept a maxTimeMS limit. If a majority of voting members never install the new configuration, the operation waits indefinitely.
与已删除成员的连接
默认情况下，副本集节点等待 5 分钟，然后再删除到删除的节点的连接。在分片副本集中，您可以使用 ShardingTaskExecutorPoolHostTimeoutMS 服务器参数修改该超时。
要立即删除从副本集到已删除成员的所有传出连接，请对副本集的每个剩余成员运行 dropConnections 管理命令：
db.adminCommand( { "dropConnections" : 1, "hostAndPort" : [ "<hostname>:<port>" ] } )
将 <hostname> 替换为已删除成员的主机名，将 <port> 替换为 mongod 监听的端口。