According to the CyberArk Sentry Secrets Manager documentation, Conjur is a secrets management solution that consists of a leader node and one or more follower nodes. The leader node is responsible for managing the secrets, policies, and audit records, while the follower nodes are read-only replicas that can serve secrets requests from applications. Additionally, Conjur supports a standby node, which is a special type of follower node that can be promoted to a leader node in case of a leader failure. A standby node is synchronized with the leader node and can take over its role in a disaster recovery scenario. A possible Conjur node role change is when a standby node is promoted to a leader node, either manually or automatically, using the auto-failover feature. A follower node cannot be promoted to a leader node, as it does not have the same data and functionality as the leader node. A standby node cannot be promoted to a follower node, as it already has the same capabilities as a follower node, plus the ability to become a leader node. A leader node cannot be demoted to a standby node in the event of a failover, as it would lose its data and functionality and would not be able to resume its role as a leader node. References: 1: Conjur Architecture 2: Deploying Conjur on AWS 3: Auto-failover