nd cert-manager:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl delete ns foo
$ kubectl delete ns bar
$ istioctl uninstall --purge -y
$ helm delete -n cert-manager cert-manager
$ kubectl delete ns istio-system cert-manager
$ unset ISTIOCA FOOCA BARCA
$ rm -rf istio.yaml proxyconfig-foo.yaml proxyconfig-bar.yaml selfsigned-issuer.yaml
</code></pre></li></ul><h2 id=reasons-to-use-this-feature>Reasons to use this feature</h2><ul><li><p>Custom CA Integration - By specifying a 