Mongodb分片安全认证

官网：

http://www.mongodb.org/display/DOCS/Security+and+Authentication#SecurityandAuthentication-ReplicaSetandShardingAuthentication

http://www.mongodb.org/display/DOCS/Replica+Set+Authentication

实在不行还可以使用：

IP Address Binding：http://www.mongodb.org/display/DOCS/Security+and+Authentication#SecurityandAuthentication-IPAddressBinding