traffic destined to the <em>ratings</em>
service to <em>ratings v2</em> that uses your database.</p><p>Specify the routing for both services above by adding two
<a href=/v1.8/docs/reference/config/networking/virtual-service/>virtual services</a>. These virtual services are
specified in <code>samples/bookinfo/networking/virtual-service-ratings-mongodb.yaml</code> of an Istio release archive.
<strong><em>Important:</em></strong> make sure you
<a href=/v1.8/docs/examples/bookinfo/#apply-default-destination-rul