go/src/v.io/x/playground/config/db-cloud-example.json

{
  "dataSourceName": "<username>:<password>@tcp(<ip_address>:3306)/<database>",
  "tlsServerName": "<gce-project>:<instance>",
  "rootCertPath": "path/server-ca.pem",
  "clientCertPath": "path/client-cert.pem",
  "clientKeyPath": "path/client-key.pem"
}