t &lt;&lt;EOF &gt; ./proxyconfig-foo.yaml
apiVersion: networking.istio.io/v1beta1
kind: ProxyConfig
metadata:
  name: foopc
  namespace: foo
spec:
  environmentVariables:
    ISTIO_META_CERT_SIGNER: foo
EOF
$ kubectl apply  -f ./proxyconfig-foo.yaml
</code></pre></li><li><p>Deploy the <code>httpbin</code> and <code>sleep</code> sample applications in the <code>foo</code> and <code>bar</code> namespaces.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl label ns foo istio-inje