e></div></li><li><p>Update the <code>MONGO_DB_URL</code> environment variable to the value of your MongoDB:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl set env deployment/ratings-v2 &#34;MONGO_DB_URL=mongodb://bookinfo:$BOOKINFO_PASSWORD@$MONGODB_HOST:$MONGODB_PORT/test?authSource=test&amp;ssl=true&#34;
deployment.extensions/ratings-v2 env updated
</code></pre></li><li><p>Route all the traffic destined to the <em>reviews</em> service to its <em>v3</em> version. You do t