use <a href=https://docs.lightstep.com/docs/instrument-with-istio-as-your-service-mesh#cacertpem-file>this certificate</a>.
If you deploy the Bookinfo application in a different namespace, create the secret in that namespace instead.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ CACERT=$(cat Cert_Auth.crt | base64) # Cert_Auth.crt contains the necessary CACert
$ NAMESPACE=default
</code></pre><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ cat &lt;&lt;EOF |