What is a possible approach to avoid the split brain scenario?

To avoid the split brain scenario, using a DNS alias for the vault is a viable approach. The split brain problem arises in distributed systems when two or more nodes lose communication with each other but continue to operate independently, potentially leading to data inconsistency or conflicting states.

By implementing a DNS alias for the vault, it allows for a single point of access, which can be redirected to a healthy node if one goes down. This way, clients are directed to the operational node, reducing the risk of multiple nodes attempting to process requests simultaneously and therefore minimizing the chances of data conflicts and inconsistencies.

The other approaches do not address the specific issue of split brain as effectively. A load balancer can help manage traffic and workload distribution, but it may not solve the problem if individual nodes become disconnected. Increasing server hardware resources could improve performance but does not directly relate to communication failures. Disabling network redundancy altogether increases the risk of a split brain scenario, as it would eliminate the means for nodes to communicate effectively and failover correctly.