- Select aurora cluster
- Create a reader making sure all the options are correct and they are in the same db parameter group
- Make sure the reader completes setup and the replica lag is withing acceptable range 13 - 20 ms
- Set the highest failover priority for the reader after its completely setup usually failover-0
- Make sure there are no pending changes
- Select writer and select failover and accept prompts
- Wait for the failover process to complete (30 - 60 seconds)
- You should have the reader promoted to a writer
Reference: