Hey @Paul_Welch ,
I realized I was approaching this the wrong way. First we need to ensure that all resources and configurations are identical across all three nodes.
- The first step is to convert the standalone instance into a single-primary replica set.
- Once that’s done, we should take an EBS snapshot of the primary and attach it to the other two nodes.
- This ensures the replication ID (stored in the local database) matches the primary.
- After that, we can simply run rs.add() to add the remaining nodes as secondaries and complete the PSS replica setup.