 enabled by the fact that the <code>productpage</code> service
adds a custom <code>end-user</code> header to all outbound HTTP requests to the reviews
service.</p><p>Remember, <code>reviews:v2</code> is the version that includes the star ratings feature.</p><ol><li><p>Run the following command to enable user-based routing:</p><div><a data-skipendnotes=true style=display:none href=https://raw.githubusercontent.com/istio/istio/release-1.5/samples/bookinfo/networking/virtual-service-reviews-test-v2.yaml>Zip</a