What is the problem that needs to be solved?

All possible error states and failures reported in the mongod and mongos log files are not raised as alerts in the Ops Manager alerting system. This prevents users from configuring alerts on important events in MongoDB deployments.

Why is it a problem? (the pain)

For some users specific errors such as FATAL or ERROR lines in the mongod log need to be alerted and addressed with urgency. Since the specific high priority event is different for different users, a configurable, string matching (regex) driven alerting system that constantly monitors the mongod and mongos log files is needed for maximum flexibility.