We have a setup MongoDB cluster that consists of a total of 5 nodes of which 3 are on-premise and 2 nodes on cloud server. We have configured 2 nodes on cloud servers to be hidden and priority-0 to avoid delays in writes due to latency.
In case of an outage at our DC, the only nodes that will remain in our cluster will be the hidden nodes that are on the cloud. In such a scenario, can we somehow make the hidden nodes primary and secondary? And later add more nodes to it?