ng guides and codelabs on
how to write your own extensions for custom integrations.</p><p>By changing the extension model, we were also able to remove dozens of CRDs.
You no longer need a unique CRD for every piece of software you integrate with
Istio.</p><p>Installing Istio 1.5 with the &lsquo;preview&rsquo; configuration profile won&rsquo;t install
Mixer. If you upgrade from a previous release, or install the &lsquo;default&rsquo; profile,
we still keep Mixer around, to be safe. When using Prometheus or S