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从 websocket 熟悉 k8s 以及 APISIX-Ingress

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CheverJohn

My env:

kubectl version: Client Version: v1.23.5   Server Version: v1.23.4
kind version: kind v0.12.0 go1.17.8 linux/amd64
helm version: version.BuildInfo{Version:"v3.8.1", GitCommit:"5cb9af4b1b271d11d7a97a71df3ac337dd94ad37", GitTreeState:"clean", GoVersion:"go1.17.5"}
ingress version:

I will describe my successful recurrence process as follows.

Install APISIX Ingress​

Config APISIX Cluster​

Commands as follows:

cat <<EOF | kind create cluster --config=-
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
  kubeadmConfigPatches:
  - |
    kind: InitConfiguration
    nodeRegistration:
      kubeletExtraArgs:
        node-labels: "ingress-ready=true"
  extraPortMappings:
  - containerPort: 80
    hostPort: 80
    protocol: TCP
  - containerPort: 443
    hostPort: 443
    protocol: TCP
EOF

Install APISIX Ingress​

commands as follows:

helm repo add apisix https://charts.apiseven.com
helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo update
kubectl create ns ingress-apisix
helm install apisix apisix/apisix \
  --set gateway.type=NodePort \
  --set ingress-controller.enabled=true \
  --namespace ingress-apisix \
  --set ingress-controller.config.apisix.serviceNamespace=ingress-apisix
kubectl get service --namespace ingress-apisix

Enable web-socket backend service​

You can refer to this link for more information.

// pull image jmalloc/echo-server
kubectl run websocket-server --image jmalloc/echo-server --port 8080

// expose pod
kubectl expose pod websocket-server --port 8080

// check the service
kubectl get service websocket-server

Create a resource​

create a websocket.yaml

apiVersion: apisix.apache.org/v2beta3
kind: ApisixRoute
metadata:
  name: ws-route
spec:
  http:
  - name: websocket
    match:
      hosts:
      - ws.foo.org
      paths:
      - /*
    websocket: true
    backends:
       - serviceName: websocket-server
         servicePort: 8080
kubectl apply -f websock.yaml

Test​

kubectl exec -it -n ingress-apisix apisix-cfcdc4999-7jq8l -- curl http://127.0.0.1:9180/apisix/admin/routes -H 'X-API-Key: edd1c9f034335f136f87ad84b625c8f1'

kubectl exec -it -n ingress-apisix apisix-cfcdc4999-7jq8l -- curl http://127.0.0.1:9080/headers -H 'Host: ws.foo.org'

Then you will see:

chever@cloud-native-01:~/api7/cloud_native/websock$ kubectl exec -it -n ingress-apisix apisix-cfcdc4999-7jq8l -- curl http://127.0.0.1:9080/headers -H 'Host: ws.foo.org'
Defaulted container "apisix" out of: apisix, wait-etcd (init)
Request served by websocket-server
 
HTTP/1.1 GET /headers

Host: ws.foo.org
X-Forwarded-Host: ws.foo.org
X-Forwarded-Port: 9080
User-Agent: curl/7.79.1
Accept: */*
X-Real-Ip: 127.0.0.1
X-Forwarded-For: 127.0.0.1
X-Forwarded-Proto: http