<p>My Gateway and VirtualService for the sample BookInfo looks like this:</p>
<pre><code>apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: bookinfo-gateway
spec:
  selector:
    istio: ingressgateway # use istio default controller
  servers:
  - port:
      number: 80
      name: http
      protocol: HTTP
    hosts:
    - &quot;*&quot;
    tls:
      httpsRedirect: true
  - port:
      number: 443
      name: https
      protocol: HTTPS
    hosts:
    - &quot;*&quot;
    tls:
      mode: SIMPLE 
      serverCertificate: /etc/istio/ingressgateway-certs/tls.crt
      privateKey: /etc/istio/ingressgateway-certs/tls.key
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: bookinfo
spec:
  hosts:
  - &quot;*&quot;
  gateways:
  - bookinfo-gateway
  http:
  - match:
    - uri:
        exact: /productpage
    - uri:
        prefix: /static
    - uri:
        exact: /login
    - uri:
        exact: /logout
    route:
    - destination:
        host: productpage
        port:
          number: 9080
  - match:
    - uri:
        regex: &quot;v1&quot;
    route:
    - destination:
        host: productpage
        port:
          number: 9080
</code></pre>
<p>I am terminating TLS at the gateway and in the HTTP route, I have configured a regex match on &quot;v1&quot; for HTTP and routing it the productpage service.</p>
<p>I am testing this by sending a request to <code>http://External-IP/api/v1/products</code> (the sample application's productpage service is configured to return a text body on this endpoint), but the request fails with HTTP 404. I am not sure what I am doing wrong here, any help is highly appreciated.</p>

<p>I think I found the mistake here, the <code>regex : &quot;v1&quot;</code> does not do partial match.</p>
<pre><code>  - match:
    - uri:
        regex: v1
    route:
    - destination:
        host: productpage
        port:
          number: 9080
</code></pre>
<p>Instead I had to specify <code>regex : .*v1.*</code> to make it work. I am able to route now.</p>
<pre><code>  - match:
    - uri:
        regex: .*v1.*
    route:
    - destination:
        host: productpage
        port:
          number: 9080
</code></pre>
