Deploy the HTTPBin application - Alibaba Cloud Service Mesh

HTTPBin is an open source application for testing and is commonly used for web debugging. After you deploy the HTTPBin application, you can easily view the methods, headers, and authorization information of HTTP requests. This topic describes how to deploy the HTTPBin application.

Prerequisites

Procedure

Deploy the HTTPBin application in the Container Service for Kubernetes (ACK) cluster on the data plane.

Use the following content to create an httpbin-application.yaml file:

Expand to view the httpbin-application.yaml file

apiVersion: v1
kind: ServiceAccount
metadata:
  name: httpbin
---
apiVersion: v1
kind: Service
metadata:
  name: httpbin
  labels:
    app: httpbin
    service: httpbin
spec:
  ports:
  - name: http
    port: 8000
    targetPort: 80
  selector:
    app: httpbin
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: httpbin
spec:
  replicas: 1
  selector:
    matchLabels:
      app: httpbin
      version: v1
  template:
    metadata:
      labels:
        app: httpbin
        version: v1
    spec:
      serviceAccountName: httpbin
      containers:
      - image: registry-cn-hangzhou.ack.aliyuncs.com/ack-demo/httpbin:0.1.0
        imagePullPolicy: IfNotPresent
        name: httpbin
        ports:
        - containerPort: 80

Use kubectl to connect to the ACK cluster and run the following command to deploy the HTTPBin application:
```
kubectl apply -f httpbin-application.yaml
```

Configure a traffic rule for the HTTPBin application.

Use the following content to create an Istio gateway. For more information, see Manage Istio gateways.

apiVersion: networking.istio.io/v1beta1
kind: Gateway
metadata:
  name: httpbin
  namespace: default
spec:
  selector:
    istio: ingressgateway
  servers:
    - hosts:
        - '*'
      port:
        name: test
        number: 80
        protocol: HTTP

Use the following content to create a virtual service. For more information, see Manage virtual services.

apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: httpbin-vs
  namespace: default
spec:
  gateways:
    - httpbin
  hosts:
    - '*'
  http:
    - name: test
      route:
        - destination:
            host: httpbin.default.svc.cluster.local
            port:
              number: 8000

Perform access tests.
Replace the IP address of the ASM gateway in the following commands with the actual IP address of the ASM gateway. For more information about how to obtain the IP address of the gateway, see Obtain the IP address of the ingress gateway.
1. Run the following command to access the /status/200 path of the HTTPBin application:
```
curl http://${IP address of the ASM gateway}/status/200 -v
```
  200 OK is returned.
2. Run the following command to access the /status/418 path of the HTTPBin application:
```
curl http://${IP address of the ASM gateway}/status/418 -v
```
  418 Unknown is returned.
3. Run the following command to access the /status/403 path of the HTTPBin application:
```
curl http://${IP address of the ASM gateway}/status/403 -v
```
  403 Forbidden is returned.
4. Run the following command to access the /headers path of the HTTPBin application:
```
curl http://${IP address of the ASM gateway}/headers -H test-header:test-value -v
```
  The response contains the headers carried in the request.

Related operations

You can also deploy the sleep service in the cluster on the data plane and use the sleep service to access the HTTPBin application to verify that the HTTPBin application is deployed successfully.

Use the following content to create a sleep.yaml file:

##################################################################################################
# Sample sleep service 
##################################################################################################
apiVersion: v1
kind: ServiceAccount
metadata:
  name: sleep
---
apiVersion: v1
kind: Service
metadata:
  name: sleep
  labels:
    app: sleep
    service: sleep
spec:
  ports:
  - port: 80
    name: http
  selector:
    app: sleep
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: sleep
spec:
  replicas: 1
  selector:
    matchLabels:
      app: sleep
  template:
    metadata:
      labels:
        app: sleep
    spec:
      terminationGracePeriodSeconds: 0
      serviceAccountName: sleep
      containers:
      - name: sleep
        image: registry.cn-hangzhou.aliyuncs.com/acs/curl:8.1.2
        command: ["/bin/sleep", "infinity"]
        imagePullPolicy: IfNotPresent
        volumeMounts:
        - mountPath: /etc/sleep/tls
          name: secret-volume
      volumes:
      - name: secret-volume
        secret:
          secretName: sleep-secret
          optional: true
---

Run the following command to create the sleep service:
```
kubectl apply -f sleep.yaml -n default
```
Run the following command to go to the shell terminal of the sleep pod:
```
kubectl exec -it deploy/sleep -- sh
```

Run the following command to send a request to the HTTPBin application:

curl -I http://httpbin:8000/headers

Expected output:

HTTP/1.1 200 OK
server: envoy
date: Tue, 26 Dec 2023 07:23:49 GMT
content-type: application/json
content-length: 353
access-control-allow-origin: *
access-control-allow-credentials: true
x-envoy-upstream-service-time: 1

200 OK is returned, which indicates that the access is successful. The HTTPBin application is deployed successfully.