ing External Web Services</a>, I described how external services
can be consumed by in-mesh Istio applications via HTTPS. In this post, I demonstrate consuming external services
over TCP. You will use the <a href=/v1.10/docs/examples/bookinfo/>Istio Bookinfo sample application</a>, the version in which the book
ratings data is persisted in a MySQL database. You deploy this database outside the cluster and configure the
<em>ratings</em> microservice to use it. You define a
<a href=/v1.10/docs/reference/confi