Hi folks, any can please tell if it is possible to achieve active/standby HA setup with 2 Vault instances? maybe if we use s3 as storage backend, can 2 vault instances use same bucket and operate in HA mode?
For true HA, you need at least 3, otherwise I would expect leader elections to fail with only a single remaining node.
Generally speaking, any HA setup (Vault or otherwise) should be an odd number of nodes, otherwise you risk a split-brain situation where each of the two nodes thinks its the main/leader.