de>v1</code> of a test service. Then,
you will apply a rule to mirror a portion of traffic to <code>v2</code>.</p><h2 id=before-you-begin>Before you begin</h2><ul><li><p>Set up Istio by following the instructions in the
<a href=/v1.2/docs/setup/>Installation guide</a>.</p></li><li><p>Start by deploying two versions of the <a href=https://github.com/istio/istio/tree/release-1.2/samples/httpbin>httpbin</a> service that have access logging enabled:</p><p><strong>httpbin-v1:</strong></p><pre><code class=languag