How did you configure the external component for automatic voting for the leader in the Galera cluster?

To configure an external component for automatic leader voting in a Galera cluster, tools that monitor node status and initiate voting when necessary are typically used.

Main steps:

1. Monitoring the cluster nodes' status (e.g., using scripts or monitoring systems).
2. Setting up an external coordinator (e.g., using utilities like garbd — Galera Arbitrator Daemon), which does not store data but participates in voting.
3. Configuring Galera parameters to allow automatic voting and proper response to node failures.

Example: running garbd on a separate server with connection parameters to the cluster to ensure quorum when one of the main nodes fails.

Thus, an external component (e.g., garbd) helps maintain quorum and automatically select a leader, increasing the cluster's fault tolerance.