e">whitelist</code> checking for the ratings service. Save the following YAML snippet as <code class="highlighter-rouge">checkversion-rule.yaml</code>:</p><div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">apiVersion</span><span class="pi">:</span> <span class="s">config.istio.io/v1alpha2</span>
<span class="na">kind</span><span class="pi">:</span> <span class="s">rule</span>
<span class="na">metadata</span><span class="pi">:</span>
  <span clas