Coordination Mechanism

Stalwart requires a coordination mechanism to enable communication between nodes in a cluster. Coordination allows nodes to exchange internal updates, detect failures, and remain synchronized during operation. For a full overview of how coordination works and the available options (such as peer-to-peer, Kafka, NATS, and Redis), refer to the Coordination section of this documentation.

To configure coordination in a Stalwart cluster, each node must be assigned a coordinator using the cluster.coordinator setting. This value refers to the identifier of a configured coordination backend (defined in the [store."..."] section of the configuration). All nodes in the cluster must use the same coordination mechanism to function correctly.

Example:

[cluster]
coordinator = "peer-to-peer"