 and configure the
<em>ratings</em> microservice to use it. You define a
<a href=/v1.3/docs/reference/config/networking/v1alpha3/service-entry/>Service Entry</a> to allow the in-mesh applications to
access the external database.</p><h2 id=bookinfo-sample-application-with-external-ratings-database>Bookinfo sample application with external ratings database</h2><p>First, you set up a MySQL database instance to hold book ratings data outside of your Kubernetes cluster. Then you
modify the <a href=/v1.3/docs/exa