Is there a way to track Node state change in MongoDB Replica set

Ops and Admin Replication
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1

Hi Team,

Can we capture state changes in MongoDB replica set.
For Ex.
Node1 was primary yesterday.
Today it became secondary due to weekly maintenance on Node1.

Is there a way If we would like to track these changes such as previous state of Node1 and current state of Node1 and when the state was changed.

Thanks

2

Hi @venkata_reddy,

Replica set member history is typically tracked by way of a monitoring solution which will generally also include proactive alerting for changes of interest (for example, increasing replication lag or election of a new primary).

See Monitoring for MongoDB for a list of some common tools, services, and server commands used.

You can also derive replication history like replica member state changes and reconfiguration from the MongoDB server logs, but I would usually reserve that effort for diagnostic investigation when changes cannot be adequately explained via your monitoring solution.

Regards,
Stennie