For production use, the use of a
configuration file instead of <code>--set</code> is recommended.</p><p>If you omit the <code>-f</code> flag, Istio upgrades using the default profile.</p><p>After performing several checks, <code>istioctl</code> will ask you to confirm whether to proceed.</p></li><li><p><code>istioctl</code> will in-place upgrade the Istio control plane and gateways to the new version and indicate the
completion status.</p></li><li><p>After <code>istioctl</code> completes the upgrade, you mu