<p>Say for example I have rendered all the manifests of a tool called cert-manager and I have deployed in kubernetes environment using kustomize, If I want to perform an upgrade version of cert-manager through helm, How do I do that??</p>

magic
<p>You can just run the command</p>
<pre><code>helm repo add jetstack https://charts.jetstack.io
</code></pre>
<p>update the variable or value you would like to change</p>
<pre><code>helm install \
  cert-manager jetstack/cert-manager \
  --namespace cert-manager \
  --create-namespace \
  --version v1.7.1 \
  # --set installCRDs=true
</code></pre>
<p>make sure you use the <strong>same name</strong> of <strong>deployment</strong> or <strong>stateful</strong> sets, so accordingly PODs or deployment will get rolled out.</p>
<p>i think, the cert-manager does not use the <strong>PVC</strong> or <strong>PV</strong> so nothing worry about the <strong>Read Write Many</strong>.</p>
<p>Ref doc : <a href="https://cert-manager.io/docs/installation/helm/" rel="nofollow noreferrer">https://cert-manager.io/docs/installation/helm/</a></p>
