Google Cloud SQL runs outside of your network (on a public IP). Thus it doesn't respect your firewall rules and can't use internal network addresses. I run my o

Google Cloud SQL runs outside of your network (on a public IP). Thus it doesn't respect your firewall rules and can't use internal network addresses. I run my own replicated compute engine mysql nodes for this reason. Amazon RDS and Aurora were superior DBAAS products when I was using AWS. Kubernetes on Google Container Engine is ultimately what convinced me to switch though.