Set up routing for sample apps

The following example creates an HTTP virtual gateway listener and route table for your sample apps on the www.example.com host. You can use this setup to test most Gloo policies, such as traffic management, security, and resiliency policies.

Set up routing link

1. Create a VirtualGateway resource to configure an HTTP listener on your ingress gateway proxy, which starts a process that continuously listens for incoming client requests for a specific host, port, and protocol.

     kubectl apply -f- <<EOF
   apiVersion: networking.gloo.solo.io/v2
   kind: VirtualGateway
   metadata:
     name: istio-ingressgateway
     namespace: bookinfo
   spec:
     listeners:
     - http: {}
       port:
         number: 80
     workloads:
     - selector:
         labels:
           istio: ingressgateway
   EOF
     

2. Set up a route table to forward incoming requests to the services of the Bookinfo and httpbin apps that you exposed with the HTTP gateway.

     kubectl apply -f- <<EOF
   apiVersion: networking.gloo.solo.io/v2
   kind: RouteTable
   metadata:
     name: www-example-com
     namespace: bookinfo
   spec:
     hosts:
       - www.example.com
     # Selects the virtual gateway you previously created
     virtualGateways:
       - name: istio-ingressgateway
         namespace: bookinfo
     http:
       # Route for the main productpage app
       - name: productpage
         matchers:
         - uri:
             prefix: /productpage
         forwardTo:
           destinations:
             - ref:
                 name: productpage
                 namespace: bookinfo
               port:
                 number: 9080
       # Routes all /reviews requests to the reviews-v1 or reviews-v2 apps
       - name: reviews
         labels: 
           route: reviews
         matchers:
         - uri:
             prefix: /reviews
         forwardTo:
           destinations:
             - ref:
                 name: reviews
                 namespace: bookinfo
               port:
                 number: 9080
       # Routes all /ratings requests to the ratings-v1 app
       - name: ratings-ingress
         labels:
           route: ratings
         matchers:
         - uri:
             prefix: /ratings
         forwardTo:
           destinations:
             - ref:
                 name: ratings
                 namespace: bookinfo
               port:
                 number: 9080
       # Route for the httpbin app
       - name: httpbin-ingress
         labels:
           route: httpbin
         matchers:
         - headers:
           - name: X-httpbin
         forwardTo:
           destinations:
             - ref:
                 name: httpbin
                 namespace: httpbin
               port:
                 number: 8000
   
   EOF
     

3. Save the external address of the ingress gateway.

     export INGRESS_GW_ADDRESS=$(kubectl get svc -n gloo-mesh-gateways istio-ingressgateway -o jsonpath="{.status.loadBalancer.ingress[0]['hostname','ip']}")
   echo $INGRESS_GW_ADDRESS
     

4. Send a request to each route to verify that you can reach the apps’ services. If not, try Debugging your route.

   • productpage:

       curl -vik http://www.example.com:80/productpage --resolve www.example.com:80:$INGRESS_GW_ADDRESS
       

     Example output:

       HTTP/2 200 
     ...
       

   • ratings:

       curl -vik http://www.example.com:80/ratings/1 --resolve www.example.com:80:$INGRESS_GW_ADDRESS
       

     Example output:

       HTTP/2 200
     ...
     {"id":1,"ratings":{"Reviewer1":5,"Reviewer2":4}}
       

   • reviews:

       curl -vik http://www.example.com:80/reviews/1 --resolve www.example.com:80:$INGRESS_GW_ADDRESS
     curl -vik http://www.example.com:80/reviews/2 --resolve www.example.com:80:$INGRESS_GW_ADDRESS
       

     Example output:

       HTTP/2 200 
     ...
     {"id": "1","podname": "reviews-v1-55b668fc65-6pc2c","clustername": "null","reviews": [{  "reviewer": "Reviewer1",  "text": "An extremely entertaining play by Shakespeare. The slapstick humour is refreshing!"},{  "reviewer": "Reviewer2",  "text": "Absolutely fun and entertaining. The play lacks thematic depth when compared to other plays by Shakespeare."}]}
       

   • httpbin:

       curl -vik http://www.example.com:80/status/200 -H "X-httpbin: true" --resolve www.example.com:80:$INGRESS_GW_ADDRESS
       

     Example output:

       HTTP/2 200
       

Next link

Apply a fault injection policy to the reviews service to delay requests and simulate network issues or an overloaded service.