You can achieve at certain level multi master replication using postgres native logical replication. Latest version 18 has good conflict resolution as well.
The client required the multimaster replication on the production environment. I want help regarding the following things: 1. How to setup multi-master replication on postgresql ? 2. How to handle the conflicts regarding the writes on both masters servers ? 3. Is it reliable for production ? Any other suggestions or options for multimaster ?