use a DNS address, it can contain up to 60 characters. ◦ https://cloud.google.com/sql/docs/mysql/replication/replication-from-external#setup-source-instance • Route 53に短い名前をCNAMEで登録して解決 22 very-long-name.rds.amazonaws.com CNAME short-name.example.com very-long-name.rds.amazon.com SOURCE HOST: short-name.example.com 名前解決 Connect