Your customer is running a MySQL database on-premises with read replicas.

Create a Google Kubernetes Engine (GKE) cluster, install MySQL on the cluster, and then import the dump file.

Use the mysqldump utility to take a backup of the existing on-premises database, and then import it into Cloud SQL.

Create a Compute Engine VM, install MySQL on the VM, and then import the dump file.

Create an external replica, and use Cloud SQL to synchronize the data to the replica.