Hello Stephen
If you want to upgrade 3.4.X to 4.14.1 (the latest version at this moment), the best (and quickest) approach is to export your instance and import in a fresh 4.14.1+MySQL 8 instance, take a look at this.
Anyway, I ran some utf8mb4_0900_ai_ci collation tests with the following configuration (using MySQL 8.0.33 on Docker):
My my.cnf config:
[client] default-character-set=utf8mb4 [mysql] default-character-set=utf8mb4 [mysqld] collation-server = utf8mb4_0900_ai_ci init-connect='SET NAMES utf8mb4' character-set-server = utf8mb4Rundeck runs well. In any case, make sure to test the config in a non-prod environment first.
Apologies for the delayed reply.
Regards!