al&quot;]
    methods: [&quot;GET&quot;, &quot;HEAD&quot;]
    constraints:
    - key: &quot;destination.labels[version]&quot;
      values: [&quot;v1&quot;, &quot;v2&quot;]
</code></pre><p>A ServiceRoleBinding specification includes two parts:</p><ul><li>The <code>roleRef</code> field that refers to a ServiceRole object in the same namespace.</li><li>A list of <code>subjects</code> that are assigned the roles.</li></ul><p>In addition to a simple <code>user</code> field, operators can also use custom keys i