In several topologies , there are servers that are more suited to be master if possible and others that might be a DR or we would only like to be a master as a last resort.
I would like the ability to prioritize the servers that are reviewed for master eligibility in a failover.
For example, If I am currently running master on MariaDB-1 and I also have MariaDB-2, MariaDB-3, and MariaDB-DR, In the event of failover, I want MariaDB-2 and then MariaDB-3 to be checked for Master viability before ever checking MariaDB-DR. I don't want to exclude DR entirely with servers_no_promotion, but I want it to be the very last resort in the event 1, 2, & 3 are all down.
Similarly, I might have more resources allocated to MariaDB1 & MariaDB2 but have a smaller server running as a backup slave on MariaDB3 (not an ideal scenario, but not uncommon with limited budgets). In a failover scenario, I might want to always prioritize failing over to 1 & 2 before resorting to 3.