Routing via Ingress

Routing via Ingress

Routing BookNest Through an Ingress

Remove the demo Ingress and its generated Gateway, apply k8s/gateway.yaml, and send requests through the entry point; --resolve supplies the DNS record a real domain would have:

Routing BookNest through the GatewayShell

kubectl delete ingress shop >/dev/null && kubectl delete gateway kind-ingress-gateway >/dev/null
kubectl apply -f k8s/gateway.yaml
kubectl wait --for=condition=Programmed gateway/booknest --timeout=60s >/dev/null
kubectl get gateway booknest
IP=$(kubectl get gateway booknest -o jsonpath='{.status.addresses[0].value}')
curl -s --resolve books.example.com:80:$IP http://books.example.com/version; echo
curl -s --cacert ~/books.crt --resolve books.example.com:443:$IP \
  https://books.example.com/api/books/3 | cut -c1-70
curl -s -o /dev/null -w '%{http_code}\n' -H 'Host: shop.example.com' http://$IP/
docker ps --filter name=kindccm-gw --format '{{.Names}}  {{.Ports}}' | cut -d, -f1,3

Output

gateway.gateway.networking.k8s.io/booknest created
httproute.gateway.networking.k8s.io/booknest created
NAME       CLASS                 ADDRESS      PROGRAMMED   AGE
booknest   cloud-provider-kind   172.18.0.5   True         5s
{"version":"1.4.0"}
{"id":3,"title":"Salt and Saffron","author":"Priya Nair","genre":"Cook
404
kindccm-gw-06379590c43f  0.0.0.0:32796->80/tcp, 0.0.0.0:32797->443/tcp

HTTP and HTTPS both reached the API, and an unknown host got Envoy 117,531 's 404. The kind 14,561 network is not routable from Windows, so Docker 514 publishes Envoy's ports 80 and 443 on ephemeral host ports (last line): map books.example.com to 127.0.0.1 in the Windows hosts file and browse to that name with the port shown.

The NodePort from Exposing BookNest is now redundant. Delete type: NodePort and nodePort: 30080 from k8s/web.yaml, apply it, and commit:

Retiring the NodePort and committing the routeShell

kubectl apply -f k8s/web.yaml | grep service && kubectl get service web
curl -s -m 3 http://127.0.0.1:33080/ || echo "33080: no answer"
git add k8s/gateway.yaml k8s/web.yaml
git commit -qm "Route BookNest through a Gateway and retire the web NodePort"

Output

service/web configured
NAME   TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE
web    ClusterIP   10.96.98.219   <none>        80/TCP    15m
33080: no answer

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