estination rules, or service entries
in one namespace and then reuse them in other namespaces, if they are exported
to those namespaces.
Istio exports all traffic management resources to all namespaces by default,
but you can override the visibility with the <code>exportTo</code> field.
For example, only requests from workloads in the same namespace can be affected by the following virtual service:</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: networking.istio.io/v1alph