Proxy Requests to a Service

This tutorial shows you how to create a basic route with the Ingress Controller that proxies requests to a sample service running in the cluster and verify that the routing functions correctly.

Prerequisite

1. Complete Set Up Ingress Controller and Gateway.

Start an Example Upstream Service

Create the following Kubernetes manifest to deploy an HTTPBIN service in the aic namespace:

httpbin.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: aic
  name: httpbin
spec:
  replicas: 1
  selector:
    matchLabels:
      app: httpbin
  template:
    metadata:
      labels:
        app: httpbin
    spec:
      containers:
      - name: httpbin
        image: kennethreitz/httpbin
        imagePullPolicy: IfNotPresent
        ports:
        - name: http
          containerPort: 80
          protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
  namespace: aic
  name: httpbin
spec:
  selector:
    app: httpbin
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 80
  type: ClusterIP

Apply the manifest:

kubectl apply -f httpbin.yaml

Create a Route

Create a Kubernetes manifest file for a route that will proxy requests to the HTTPBIN sample upstream service:

Gateway API

httpbin-route.yaml

apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  namespace: aic
  name: getting-started-ip
spec:
  parentRefs:
  - name: apisix
  rules:
  - matches:
    - path:
        type: Exact
        value: /ip
    backendRefs:
    - name: httpbin
      port: 80

Ingress

httpbin-route.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  namespace: aic
  name: getting-started-ip
spec:
  ingressClassName: apisix
  rules:
    - http:
        paths:
          - backend:
              service:
                name: httpbin
                port:
                  number: 80
            path: /ip
            pathType: Exact

APISIX CRD

httpbin-route.yaml

apiVersion: apisix.apache.org/v2
kind: ApisixRoute
metadata:
  namespace: aic
  name: getting-started-ip
spec:
  ingressClassName: apisix
  http:
    - name: getting-started-ip
      match:
        paths:
          - /ip
      backends:
        - serviceName: httpbin
          servicePort: 80

Apply the configurations to your cluster:

kubectl apply -f httpbin-route.yaml

Verify Routing

Expose the gateway’s service port to your local machine:

# replace with your gateway’s service name
kubectl port-forward svc/<gateway-service-name> 9080:80 &

Send a request to the route:

curl "http://127.0.0.1:9080/ip"

You should see a response of the following:

{
  "origin": "127.0.0.1"
}

Delete the Route

To remove the previously created route, run the following command:

kubectl delete -f httpbin-route.yaml

Next Step

You have now learned the basics of proxying requests with a route. Next, you will explore the broader capabilities provided by the plugin ecosystem.